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update mod

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astaxie 2018-11-09 12:37:28 +08:00
parent 9fdc1eaf3a
commit 5ea04bdfd3
548 changed files with 339257 additions and 46 deletions
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35
go.mod
View File

@ -1,8 +1,39 @@
module github.com/astaxie/beego
require (
github.com/BurntSushi/toml v0.3.1 // indirect
github.com/Knetic/govaluate v3.0.0+incompatible // indirect
github.com/beego/goyaml2 v0.0.0-20130207012346-5545475820dd
github.com/beego/x2j v0.0.0-20131220205130-a0352aadc542
github.com/belogik/goes v0.0.0-20151229125003-e54d722c3aff
github.com/bradfitz/gomemcache v0.0.0-20180710155616-bc664df96737
github.com/casbin/casbin v1.6.0
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58
github.com/couchbase/go-couchbase v0.0.0-20181019154153-595f46701cbc
github.com/couchbase/gomemcached v0.0.0-20180723192129-20e69a1ee160 // indirect
github.com/couchbase/goutils v0.0.0-20180530154633-e865a1461c8a // indirect
github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/edsrzf/mmap-go v0.0.0-20170320065105-0bce6a688712 // indirect
github.com/go-redis/redis v6.14.2+incompatible
github.com/go-sql-driver/mysql v1.4.0
github.com/gogo/protobuf v1.1.1
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db // indirect
github.com/gomodule/redigo v2.0.0+incompatible
github.com/lib/pq v1.0.0
github.com/mattn/go-sqlite3 v1.10.0
github.com/onsi/gomega v1.4.2 // indirect
github.com/pelletier/go-toml v1.2.0 // indirect
github.com/pkg/errors v0.8.0 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726 // indirect
github.com/siddontang/ledisdb v0.0.0-20181029004158-becf5f38d373
github.com/siddontang/rdb v0.0.0-20150307021120-fc89ed2e418d // indirect
github.com/ssdb/gossdb v0.0.0-20180723034631-88f6b59b84ec
github.com/stretchr/testify v1.2.2 // indirect
github.com/syndtr/goleveldb v0.0.0-20181105012736-f9080354173f // indirect
github.com/wendal/errors v0.0.0-20130201093226-f66c77a7882b // indirect
golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb
golang.org/x/net v0.0.0-20170920234330-b60f3a92103d
google.golang.org/appengine v1.1.0
google.golang.org/appengine v1.1.0 // indirect
gopkg.in/yaml.v2 v2.2.1
)

87
go.sum
View File

@ -1,7 +1,92 @@
github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/Knetic/govaluate v3.0.0+incompatible h1:7o6+MAPhYTCF0+fdvoz1xDedhRb4f6s9Tn1Tt7/WTEg=
github.com/Knetic/govaluate v3.0.0+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
github.com/beego/goyaml2 v0.0.0-20130207012346-5545475820dd h1:jZtX5jh5IOMu0fpOTC3ayh6QGSPJ/KWOv1lgPvbRw1M=
github.com/beego/goyaml2 v0.0.0-20130207012346-5545475820dd/go.mod h1:1b+Y/CofkYwXMUU0OhQqGvsY2Bvgr4j6jfT699wyZKQ=
github.com/beego/x2j v0.0.0-20131220205130-a0352aadc542 h1:nYXb+3jF6Oq/j8R/y90XrKpreCxIalBWfeyeKymgOPk=
github.com/beego/x2j v0.0.0-20131220205130-a0352aadc542/go.mod h1:kSeGC/p1AbBiEp5kat81+DSQrZenVBZXklMLaELspWU=
github.com/belogik/goes v0.0.0-20151229125003-e54d722c3aff h1:/kO0p2RTGLB8R5gub7ps0GmYpB2O8LXEoPq8tzFDCUI=
github.com/belogik/goes v0.0.0-20151229125003-e54d722c3aff/go.mod h1:PhH1ZhyCzHKt4uAasyx+ljRCgoezetRNf59CUtwUkqY=
github.com/bradfitz/gomemcache v0.0.0-20180710155616-bc664df96737 h1:rRISKWyXfVxvoa702s91Zl5oREZTrR3yv+tXrrX7G/g=
github.com/bradfitz/gomemcache v0.0.0-20180710155616-bc664df96737/go.mod h1:PmM6Mmwb0LSuEubjR8N7PtNe1KxZLtOUHtbeikc5h60=
github.com/casbin/casbin v1.6.0 h1:uIhuV5I0ilXGUm3y+xJ8nG7VOnYDeZZQiNsFOTF2QmI=
github.com/casbin/casbin v1.6.0/go.mod h1:c67qKN6Oum3UF5Q1+BByfFxkwKvhwW57ITjqwtzR1KE=
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58 h1:F1EaeKL/ta07PY/k9Os/UFtwERei2/XzGemhpGnBKNg=
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58/go.mod h1:EOBUe0h4xcZ5GoxqC5SDxFQ8gwyZPKQoEzownBlhI80=
github.com/couchbase/go-couchbase v0.0.0-20181019154153-595f46701cbc h1:Byzmalcea3rzOdgt4Ny3xrtXkd25zUMPFI5oeKksSbU=
github.com/couchbase/go-couchbase v0.0.0-20181019154153-595f46701cbc/go.mod h1:TWI8EKQMs5u5jLKW/tsb9VwauIrMIxQG1r5fMsswK5U=
github.com/couchbase/gomemcached v0.0.0-20180723192129-20e69a1ee160 h1:yaqs73s76owCkJbPZo8GKSosZoMjezdLDslJ8aaDk0w=
github.com/couchbase/gomemcached v0.0.0-20180723192129-20e69a1ee160/go.mod h1:srVSlQLB8iXBVXHgnqemxUXqN6FCvClgCMPCsjBDR7c=
github.com/couchbase/goutils v0.0.0-20180530154633-e865a1461c8a h1:Y5XsLCEhtEI8qbD9RP3Qlv5FXdTDHxZM9UPUnMRgBp8=
github.com/couchbase/goutils v0.0.0-20180530154633-e865a1461c8a/go.mod h1:BQwMFlJzDjFDG3DJUdU0KORxn88UlsOULuxLExMh3Hs=
github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76 h1:Lgdd/Qp96Qj8jqLpq2cI1I1X7BJnu06efS+XkhRoLUQ=
github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76/go.mod h1:vYwsqCOLxGiisLwp9rITslkFNpZD5rz43tf41QFkTWY=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/edsrzf/mmap-go v0.0.0-20170320065105-0bce6a688712 h1:aaQcKT9WumO6JEJcRyTqFVq4XUZiUcKR2/GI31TOcz8=
github.com/edsrzf/mmap-go v0.0.0-20170320065105-0bce6a688712/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/go-redis/redis v6.14.2+incompatible h1:UE9pLhzmWf+xHNmZsoccjXosPicuiNaInPgym8nzfg0=
github.com/go-redis/redis v6.14.2+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
github.com/go-sql-driver/mysql v1.4.0 h1:7LxgVwFb2hIQtMm87NdgAVfXjnt4OePseqT1tKx+opk=
github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
github.com/gogo/protobuf v1.1.1 h1:72R+M5VuhED/KujmZVcIquuo8mBgX4oVda//DQb3PXo=
github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/gomodule/redigo v2.0.0+incompatible h1:K/R+8tc58AaqLkqG2Ol3Qk+DR/TlNuhuh457pBFPtt0=
github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/lib/pq v1.0.0 h1:X5PMW56eZitiTeO7tKzZxFCSpbFZJtkMMooicw2us9A=
github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
github.com/onsi/ginkgo v1.6.0 h1:Ix8l273rp3QzYgXSR+c8d1fTG7UPgYkOSELPhiY/YGw=
github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
github.com/onsi/gomega v1.4.2 h1:3mYCb7aPxS/RU7TI1y4rkEn1oKmPRjNJLNEXgw7MH2I=
github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
github.com/pelletier/go-toml v1.2.0 h1:T5zMGML61Wp+FlcbWjRDT7yAxhJNAiPPLOFECq181zc=
github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726 h1:xT+JlYxNGqyT+XcU8iUrN18JYed2TvG9yN5ULG2jATM=
github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726/go.mod h1:3yhqj7WBBfRhbBlzyOC3gUxftwsU0u8gqevxwIHQpMw=
github.com/siddontang/ledisdb v0.0.0-20181029004158-becf5f38d373 h1:p6IxqQMjab30l4lb9mmkIkkcE1yv6o0SKbPhW5pxqHI=
github.com/siddontang/ledisdb v0.0.0-20181029004158-becf5f38d373/go.mod h1:mF1DpOSOUiJRMR+FDqaqu3EBqrybQtrDDszLUZ6oxPg=
github.com/siddontang/rdb v0.0.0-20150307021120-fc89ed2e418d h1:NVwnfyR3rENtlz62bcrkXME3INVUa4lcdGt+opvxExs=
github.com/siddontang/rdb v0.0.0-20150307021120-fc89ed2e418d/go.mod h1:AMEsy7v5z92TR1JKMkLLoaOQk++LVnOKL3ScbJ8GNGA=
github.com/ssdb/gossdb v0.0.0-20180723034631-88f6b59b84ec h1:q6XVwXmKvCRHRqesF3cSv6lNqqHi0QWOvgDlSohg8UA=
github.com/ssdb/gossdb v0.0.0-20180723034631-88f6b59b84ec/go.mod h1:QBvMkMya+gXctz3kmljlUCu/yB3GZ6oee+dUozsezQE=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/syndtr/goleveldb v0.0.0-20181105012736-f9080354173f h1:EEVjSRihF8NIbfyCcErpSpNHEKrY3s8EAwqiPENZZn8=
github.com/syndtr/goleveldb v0.0.0-20181105012736-f9080354173f/go.mod h1:Z4AUp2Km+PwemOoO/VB5AOx9XSsIItzFjoJlOSiYmn0=
github.com/wendal/errors v0.0.0-20130201093226-f66c77a7882b h1:0Ve0/CCjiAiyKddUMUn3RwIGlq2iTW4GuVzyoKBYO/8=
github.com/wendal/errors v0.0.0-20130201093226-f66c77a7882b/go.mod h1:Q12BUT7DqIlHRmgv3RskH+UCM/4eqVMgI0EMmlSpAXc=
golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb h1:Ah9YqXLj6fEgeKqcmBuLCbAsrF3ScD7dJ/bYM0C6tXI=
golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/net v0.0.0-20170920234330-b60f3a92103d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
google.golang.org/appengine v1.1.0 h1:igQkv0AAhEIvTEpD5LIpAfav2eeVO9HBTjvKHVJPRSs=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

28
vendor/github.com/Knetic/govaluate/.gitignore generated vendored Normal file
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@ -0,0 +1,28 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
coverage.out
manual_test.go
*.out
*.err

10
vendor/github.com/Knetic/govaluate/.travis.yml generated vendored Normal file
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@ -0,0 +1,10 @@
language: go
script: ./test.sh
go:
- 1.2
- 1.3
- 1.4
- 1.5
- 1.6

12
vendor/github.com/Knetic/govaluate/CONTRIBUTORS generated vendored Normal file
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@ -0,0 +1,12 @@
This library was authored by George Lester, and contains contributions from:
vjeantet (regex support)
iasci (ternary operator)
oxtoacart (parameter structures, deferred parameter retrieval)
wmiller848 (bitwise operators)
prashantv (optimization of bools)
dpaolella (exposure of variables used in an expression)
benpaxton (fix for missing type checks during literal elide process)
abrander (panic-finding testing tool)
xfennec (fix for dates being parsed in the current Location)
bgaifullin (lifting restriction on complex/struct types)

272
vendor/github.com/Knetic/govaluate/EvaluableExpression.go generated vendored Normal file
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@ -0,0 +1,272 @@
package govaluate
import (
"errors"
"fmt"
)
const isoDateFormat string = "2006-01-02T15:04:05.999999999Z0700"
const shortCircuitHolder int = -1
var DUMMY_PARAMETERS = MapParameters(map[string]interface{}{})
/*
EvaluableExpression represents a set of ExpressionTokens which, taken together,
are an expression that can be evaluated down into a single value.
*/
type EvaluableExpression struct {
/*
Represents the query format used to output dates. Typically only used when creating SQL or Mongo queries from an expression.
Defaults to the complete ISO8601 format, including nanoseconds.
*/
QueryDateFormat string
/*
Whether or not to safely check types when evaluating.
If true, this library will return error messages when invalid types are used.
If false, the library will panic when operators encounter types they can't use.
This is exclusively for users who need to squeeze every ounce of speed out of the library as they can,
and you should only set this to false if you know exactly what you're doing.
*/
ChecksTypes bool
tokens []ExpressionToken
evaluationStages *evaluationStage
inputExpression string
}
/*
Parses a new EvaluableExpression from the given [expression] string.
Returns an error if the given expression has invalid syntax.
*/
func NewEvaluableExpression(expression string) (*EvaluableExpression, error) {
functions := make(map[string]ExpressionFunction)
return NewEvaluableExpressionWithFunctions(expression, functions)
}
/*
Similar to [NewEvaluableExpression], except that instead of a string, an already-tokenized expression is given.
This is useful in cases where you may be generating an expression automatically, or using some other parser (e.g., to parse from a query language)
*/
func NewEvaluableExpressionFromTokens(tokens []ExpressionToken) (*EvaluableExpression, error) {
var ret *EvaluableExpression
var err error
ret = new(EvaluableExpression)
ret.QueryDateFormat = isoDateFormat
err = checkBalance(tokens)
if err != nil {
return nil, err
}
err = checkExpressionSyntax(tokens)
if err != nil {
return nil, err
}
ret.tokens, err = optimizeTokens(tokens)
if err != nil {
return nil, err
}
ret.evaluationStages, err = planStages(ret.tokens)
if err != nil {
return nil, err
}
ret.ChecksTypes = true
return ret, nil
}
/*
Similar to [NewEvaluableExpression], except enables the use of user-defined functions.
Functions passed into this will be available to the expression.
*/
func NewEvaluableExpressionWithFunctions(expression string, functions map[string]ExpressionFunction) (*EvaluableExpression, error) {
var ret *EvaluableExpression
var err error
ret = new(EvaluableExpression)
ret.QueryDateFormat = isoDateFormat
ret.inputExpression = expression
ret.tokens, err = parseTokens(expression, functions)
if err != nil {
return nil, err
}
err = checkBalance(ret.tokens)
if err != nil {
return nil, err
}
err = checkExpressionSyntax(ret.tokens)
if err != nil {
return nil, err
}
ret.tokens, err = optimizeTokens(ret.tokens)
if err != nil {
return nil, err
}
ret.evaluationStages, err = planStages(ret.tokens)
if err != nil {
return nil, err
}
ret.ChecksTypes = true
return ret, nil
}
/*
Same as `Eval`, but automatically wraps a map of parameters into a `govalute.Parameters` structure.
*/
func (this EvaluableExpression) Evaluate(parameters map[string]interface{}) (interface{}, error) {
if parameters == nil {
return this.Eval(nil)
}
return this.Eval(MapParameters(parameters))
}
/*
Runs the entire expression using the given [parameters].
e.g., If the expression contains a reference to the variable "foo", it will be taken from `parameters.Get("foo")`.
This function returns errors if the combination of expression and parameters cannot be run,
such as if a variable in the expression is not present in [parameters].
In all non-error circumstances, this returns the single value result of the expression and parameters given.
e.g., if the expression is "1 + 1", this will return 2.0.
e.g., if the expression is "foo + 1" and parameters contains "foo" = 2, this will return 3.0
*/
func (this EvaluableExpression) Eval(parameters Parameters) (interface{}, error) {
if this.evaluationStages == nil {
return nil, nil
}
if parameters != nil {
parameters = &sanitizedParameters{parameters}
}
return this.evaluateStage(this.evaluationStages, parameters)
}
func (this EvaluableExpression) evaluateStage(stage *evaluationStage, parameters Parameters) (interface{}, error) {
var left, right interface{}
var err error
if stage.leftStage != nil {
left, err = this.evaluateStage(stage.leftStage, parameters)
if err != nil {
return nil, err
}
}
if stage.isShortCircuitable() {
switch stage.symbol {
case AND:
if left == false {
return false, nil
}
case OR:
if left == true {
return true, nil
}
case COALESCE:
if left != nil {
return left, nil
}
case TERNARY_TRUE:
if left == false {
right = shortCircuitHolder
}
case TERNARY_FALSE:
if left != nil {
right = shortCircuitHolder
}
}
}
if right != shortCircuitHolder && stage.rightStage != nil {
right, err = this.evaluateStage(stage.rightStage, parameters)
if err != nil {
return nil, err
}
}
if this.ChecksTypes {
if stage.typeCheck == nil {
err = typeCheck(stage.leftTypeCheck, left, stage.symbol, stage.typeErrorFormat)
if err != nil {
return nil, err
}
err = typeCheck(stage.rightTypeCheck, right, stage.symbol, stage.typeErrorFormat)
if err != nil {
return nil, err
}
} else {
// special case where the type check needs to know both sides to determine if the operator can handle it
if !stage.typeCheck(left, right) {
errorMsg := fmt.Sprintf(stage.typeErrorFormat, left, stage.symbol.String())
return nil, errors.New(errorMsg)
}
}
}
return stage.operator(left, right, parameters)
}
func typeCheck(check stageTypeCheck, value interface{}, symbol OperatorSymbol, format string) error {
if check == nil {
return nil
}
if check(value) {
return nil
}
errorMsg := fmt.Sprintf(format, value, symbol.String())
return errors.New(errorMsg)
}
/*
Returns an array representing the ExpressionTokens that make up this expression.
*/
func (this EvaluableExpression) Tokens() []ExpressionToken {
return this.tokens
}
/*
Returns the original expression used to create this EvaluableExpression.
*/
func (this EvaluableExpression) String() string {
return this.inputExpression
}
/*
Returns an array representing the variables contained in this EvaluableExpression.
*/
func (this EvaluableExpression) Vars() []string {
var varlist []string
for _, val := range this.Tokens() {
if val.Kind == VARIABLE {
varlist = append(varlist, val.Value.(string))
}
}
return varlist
}

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package govaluate
import (
"errors"
"fmt"
"regexp"
"time"
)
/*
Returns a string representing this expression as if it were written in SQL.
This function assumes that all parameters exist within the same table, and that the table essentially represents
a serialized object of some sort (e.g., hibernate).
If your data model is more normalized, you may need to consider iterating through each actual token given by `Tokens()`
to create your query.
Boolean values are considered to be "1" for true, "0" for false.
Times are formatted according to this.QueryDateFormat.
*/
func (this EvaluableExpression) ToSQLQuery() (string, error) {
var stream *tokenStream
var transactions *expressionOutputStream
var transaction string
var err error
stream = newTokenStream(this.tokens)
transactions = new(expressionOutputStream)
for stream.hasNext() {
transaction, err = this.findNextSQLString(stream, transactions)
if err != nil {
return "", err
}
transactions.add(transaction)
}
return transactions.createString(" "), nil
}
func (this EvaluableExpression) findNextSQLString(stream *tokenStream, transactions *expressionOutputStream) (string, error) {
var token ExpressionToken
var ret string
token = stream.next()
switch token.Kind {
case STRING:
ret = fmt.Sprintf("'%v'", token.Value)
case PATTERN:
ret = fmt.Sprintf("'%s'", token.Value.(*regexp.Regexp).String())
case TIME:
ret = fmt.Sprintf("'%s'", token.Value.(time.Time).Format(this.QueryDateFormat))
case LOGICALOP:
switch logicalSymbols[token.Value.(string)] {
case AND:
ret = "AND"
case OR:
ret = "OR"
}
case BOOLEAN:
if token.Value.(bool) {
ret = "1"
} else {
ret = "0"
}
case VARIABLE:
ret = fmt.Sprintf("[%s]", token.Value.(string))
case NUMERIC:
ret = fmt.Sprintf("%g", token.Value.(float64))
case COMPARATOR:
switch comparatorSymbols[token.Value.(string)] {
case EQ:
ret = "="
case NEQ:
ret = "<>"
case REQ:
ret = "RLIKE"
case NREQ:
ret = "NOT RLIKE"
default:
ret = fmt.Sprintf("%s", token.Value.(string))
}
case TERNARY:
switch ternarySymbols[token.Value.(string)] {
case COALESCE:
left := transactions.rollback()
right, err := this.findNextSQLString(stream, transactions)
if err != nil {
return "", err
}
ret = fmt.Sprintf("COALESCE(%v, %v)", left, right)
case TERNARY_TRUE:
fallthrough
case TERNARY_FALSE:
return "", errors.New("Ternary operators are unsupported in SQL output")
}
case PREFIX:
switch prefixSymbols[token.Value.(string)] {
case INVERT:
ret = fmt.Sprintf("NOT")
default:
right, err := this.findNextSQLString(stream, transactions)
if err != nil {
return "", err
}
ret = fmt.Sprintf("%s%s", token.Value.(string), right)
}
case MODIFIER:
switch modifierSymbols[token.Value.(string)] {
case EXPONENT:
left := transactions.rollback()
right, err := this.findNextSQLString(stream, transactions)
if err != nil {
return "", err
}
ret = fmt.Sprintf("POW(%s, %s)", left, right)
case MODULUS:
left := transactions.rollback()
right, err := this.findNextSQLString(stream, transactions)
if err != nil {
return "", err
}
ret = fmt.Sprintf("MOD(%s, %s)", left, right)
default:
ret = fmt.Sprintf("%s", token.Value.(string))
}
case CLAUSE:
ret = "("
case CLAUSE_CLOSE:
ret = ")"
case SEPARATOR:
ret = ","
default:
errorMsg := fmt.Sprintf("Unrecognized query token '%s' of kind '%s'", token.Value, token.Kind)
return "", errors.New(errorMsg)
}
return ret, nil
}

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package govaluate
/*
Represents a single parsed token.
*/
type ExpressionToken struct {
Kind TokenKind
Value interface{}
}

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The MIT License (MIT)
Copyright (c) 2014-2016 George Lester
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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govaluate
====
This library contains quite a lot of functionality, this document is meant to be formal documentation on the operators and features of it.
Some of this documentation may duplicate what's in README.md, but should never conflict.
# Types
This library only officially deals with four types; `float64`, `bool`, `string`, and arrays.
All numeric literals, with or without a radix, will be converted to `float64` for evaluation. For instance; in practice, there is no difference between the literals "1.0" and "1", they both end up as `float64`. This matters to users because if you intend to return numeric values from your expressions, then the returned value will be `float64`, not any other numeric type.
Any string _literal_ (not parameter) which is interpretable as a date will be converted to a `float64` representation of that date's unix time. Any `time.Time` parameters will not be operable with these date literals; such parameters will need to use the `time.Time.Unix()` method to get a numeric representation.
Arrays are untyped, and can be mixed-type. Internally they're all just `interface{}`. Only two operators can interact with arrays, `IN` and `,`. All other operators will refuse to operate on arrays.
# Operators
## Modifiers
### Addition, concatenation `+`
If either left or right sides of the `+` operator are a `string`, then this operator will perform string concatenation and return that result. If neither are string, then both must be numeric, and this will return a numeric result.
Any other case is invalid.
### Arithmetic `-` `*` `/` `**` `%`
`**` refers to "take to the power of". For instance, `3 ** 4` == 81.
* _Left side_: numeric
* _Right side_: numeric
* _Returns_: numeric
### Bitwise shifts, masks `>>` `<<` `|` `&` `^`
All of these operators convert their `float64` left and right sides to `int64`, perform their operation, and then convert back.
Given how this library assumes numeric are represented (as `float64`), it is unlikely that this behavior will change, even though it may cause havoc with extremely large or small numbers.
* _Left side_: numeric
* _Right side_: numeric
* _Returns_: numeric
### Negation `-`
Prefix only. This can never have a left-hand value.
* _Right side_: numeric
* _Returns_: numeric
### Inversion `!`
Prefix only. This can never have a left-hand value.
* _Right side_: bool
* _Returns_: bool
### Bitwise NOT `~`
Prefix only. This can never have a left-hand value.
* _Right side_: numeric
* _Returns_: numeric
## Logical Operators
For all logical operators, this library will short-circuit the operation if the left-hand side is sufficient to determine what to do. For instance, `true || expensiveOperation()` will not actually call `expensiveOperation()`, since it knows the left-hand side is `true`.
### Logical AND/OR `&&` `||`
* _Left side_: bool
* _Right side_: bool
* _Returns_: bool
### Ternary true `?`
Checks if the left side is `true`. If so, returns the right side. If the left side is `false`, returns `nil`.
In practice, this is commonly used with the other ternary operator.
* _Left side_: bool
* _Right side_: Any type.
* _Returns_: Right side or `nil`
### Ternary false `:`
Checks if the left side is `nil`. If so, returns the right side. If the left side is non-nil, returns the left side.
In practice, this is commonly used with the other ternary operator.
* _Left side_: Any type.
* _Right side_: Any type.
* _Returns_: Right side or `nil`
### Null coalescence `??`
Similar to the C# operator. If the left value is non-nil, it returns that. If not, then the right-value is returned.
* _Left side_: Any type.
* _Right side_: Any type.
* _Returns_: No specific type - whichever is passed to it.
## Comparators
### Numeric/lexicographic comparators `>` `<` `>=` `<=`
If both sides are numeric, this returns the usual greater/lesser behavior that would be expected.
If both sides are string, this returns the lexicographic comparison of the strings. This uses Go's standard lexicographic compare.
* _Accepts_: Left and right side must either be both string, or both numeric.
* _Returns_: bool
### Regex comparators `=~` `!~`
These use go's standard `regexp` flavor of regex. The left side is expected to be the candidate string, the right side is the pattern. `=~` returns whether or not the candidate string matches the regex pattern given on the right. `!~` is the inverted version of the same logic.
* _Left side_: string
* _Right side_: string
* _Returns_: bool
## Arrays
### Separator `,`
The separator, always paired with parenthesis, creates arrays. It must always have both a left and right-hand value, so for instance `(, 0)` and `(0,)` are invalid uses of it.
Again, this should always be used with parenthesis; like `(1, 2, 3, 4)`.
### Membership `IN`
The only operator with a text name, this operator checks the right-hand side array to see if it contains a value that is equal to the left-side value.
Equality is determined by the use of the `==` operator, and this library doesn't check types between the values. Any two values, when cast to `interface{}`, and can still be checked for equality with `==` will act as expected.
Note that you can use a parameter for the array, but it must be an `[]interface{}`.
* _Left side_: Any type.
* _Right side_: array
* _Returns_: bool
# Parameters
Parameters must be passed in every time the expression is evaluated. Parameters can be of any type, but will not cause errors unless actually used in an erroneous way. There is no difference in behavior for any of the above operators for parameters - they are type checked when used.
All `int` and `float` values of any width will be converted to `float64` before use.
At no point is the parameter structure, or any value thereof, modified by this library.
## Alternates to maps
The default form of parameters as a map may not serve your use case. You may have parameters in some other structure, you may want to change the no-parameter-found behavior, or maybe even just have some debugging print statements invoked when a parameter is accessed.
To do this, define a type that implements the `govaluate.Parameters` interface. When you want to evaluate, instead call `EvaluableExpression.Eval` and pass your parameter structure.
# Functions
During expression parsing (_not_ evaluation), a map of functions can be given to `govaluate.NewEvaluableExpressionWithFunctions` (the lengthiest and finest of function names). The resultant expression will be able to invoke those functions during evaluation. Once parsed, an expression cannot have functions added or removed - a new expression will need to be created if you want to change the functions, or behavior of said functions.
Functions always take the form `<name>(<parameters>)`, including parens. Functions can have an empty list of parameters, like `<name>()`, but still must have parens.
If the expression contains something that looks like it ought to be a function (such as `foo()`), but no such function was given to it, it will error on parsing.
Functions must be of type `map[string]govaluate.ExpressionFunction`. `ExpressionFunction`, for brevity, has the following signature:
`func(args ...interface{}) (interface{}, error)`
Where `args` is whatever is passed to the function when called. If a non-nil error is returned from a function during evaluation, the evaluation stops and ultimately returns that error to the caller of `Evaluate()` or `Eval()`.
## Built-in functions
There aren't any builtin functions. The author is opposed to maintaining a standard library of functions to be used.
Every use case of this library is different, and even in simple use cases (such as parameters, see above) different users need different behavior, naming, or even functionality. The author prefers that users make their own decisions about what functions they need, and how they operate.
# Equality
The `==` and `!=` operators involve a moderately complex workflow. They use [`reflect.DeepEqual`](https://golang.org/pkg/reflect/#DeepEqual). This is for complicated reasons, but there are some types in Go that cannot be compared with the native `==` operator. Arrays, in particular, cannot be compared - Go will panic if you try. One might assume this could be handled with the type checking system in `govaluate`, but unfortunately without reflection there is no way to know if a variable is a slice/array. Worse, structs can be incomparable if they _contain incomparable types_.
It's all very complicated. Fortunately, Go includes the `reflect.DeepEqual` function to handle all the edge cases. Currently, `govaluate` uses that for all equality/inequality.

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package govaluate
/*
Represents the valid symbols for operators.
*/
type OperatorSymbol int
const (
VALUE OperatorSymbol = iota
LITERAL
NOOP
EQ
NEQ
GT
LT
GTE
LTE
REQ
NREQ
IN
AND
OR
PLUS
MINUS
BITWISE_AND
BITWISE_OR
BITWISE_XOR
BITWISE_LSHIFT
BITWISE_RSHIFT
MULTIPLY
DIVIDE
MODULUS
EXPONENT
NEGATE
INVERT
BITWISE_NOT
TERNARY_TRUE
TERNARY_FALSE
COALESCE
FUNCTIONAL
SEPARATE
)
type operatorPrecedence int
const (
noopPrecedence operatorPrecedence = iota
valuePrecedence
functionalPrecedence
prefixPrecedence
exponentialPrecedence
additivePrecedence
bitwisePrecedence
bitwiseShiftPrecedence
multiplicativePrecedence
comparatorPrecedence
ternaryPrecedence
logicalAndPrecedence
logicalOrPrecedence
separatePrecedence
)
func findOperatorPrecedenceForSymbol(symbol OperatorSymbol) operatorPrecedence {
switch symbol {
case NOOP:
return noopPrecedence
case VALUE:
return valuePrecedence
case EQ:
fallthrough
case NEQ:
fallthrough
case GT:
fallthrough
case LT:
fallthrough
case GTE:
fallthrough
case LTE:
fallthrough
case REQ:
fallthrough
case NREQ:
fallthrough
case IN:
return comparatorPrecedence
case AND:
return logicalAndPrecedence
case OR:
return logicalOrPrecedence
case BITWISE_AND:
fallthrough
case BITWISE_OR:
fallthrough
case BITWISE_XOR:
return bitwisePrecedence
case BITWISE_LSHIFT:
fallthrough
case BITWISE_RSHIFT:
return bitwiseShiftPrecedence
case PLUS:
fallthrough
case MINUS:
return additivePrecedence
case MULTIPLY:
fallthrough
case DIVIDE:
fallthrough
case MODULUS:
return multiplicativePrecedence
case EXPONENT:
return exponentialPrecedence
case BITWISE_NOT:
fallthrough
case NEGATE:
fallthrough
case INVERT:
return prefixPrecedence
case COALESCE:
fallthrough
case TERNARY_TRUE:
fallthrough
case TERNARY_FALSE:
return ternaryPrecedence
case FUNCTIONAL:
return functionalPrecedence
case SEPARATE:
return separatePrecedence
}
return valuePrecedence
}
/*
Map of all valid comparators, and their string equivalents.
Used during parsing of expressions to determine if a symbol is, in fact, a comparator.
Also used during evaluation to determine exactly which comparator is being used.
*/
var comparatorSymbols = map[string]OperatorSymbol{
"==": EQ,
"!=": NEQ,
">": GT,
">=": GTE,
"<": LT,
"<=": LTE,
"=~": REQ,
"!~": NREQ,
"in": IN,
}
var logicalSymbols = map[string]OperatorSymbol{
"&&": AND,
"||": OR,
}
var bitwiseSymbols = map[string]OperatorSymbol{
"^": BITWISE_XOR,
"&": BITWISE_AND,
"|": BITWISE_OR,
}
var bitwiseShiftSymbols = map[string]OperatorSymbol{
">>": BITWISE_RSHIFT,
"<<": BITWISE_LSHIFT,
}
var additiveSymbols = map[string]OperatorSymbol{
"+": PLUS,
"-": MINUS,
}
var multiplicativeSymbols = map[string]OperatorSymbol{
"*": MULTIPLY,
"/": DIVIDE,
"%": MODULUS,
}
var exponentialSymbolsS = map[string]OperatorSymbol{
"**": EXPONENT,
}
var prefixSymbols = map[string]OperatorSymbol{
"-": NEGATE,
"!": INVERT,
"~": BITWISE_NOT,
}
var ternarySymbols = map[string]OperatorSymbol{
"?": TERNARY_TRUE,
":": TERNARY_FALSE,
"??": COALESCE,
}
// this is defined separately from additiveSymbols et al because it's needed for parsing, not stage planning.
var modifierSymbols = map[string]OperatorSymbol{
"+": PLUS,
"-": MINUS,
"*": MULTIPLY,
"/": DIVIDE,
"%": MODULUS,
"**": EXPONENT,
"&": BITWISE_AND,
"|": BITWISE_OR,
"^": BITWISE_XOR,
">>": BITWISE_RSHIFT,
"<<": BITWISE_LSHIFT,
}
var separatorSymbols = map[string]OperatorSymbol{
",": SEPARATE,
}
/*
Returns true if this operator is contained by the given array of candidate symbols.
False otherwise.
*/
func (this OperatorSymbol) IsModifierType(candidate []OperatorSymbol) bool {
for _, symbolType := range candidate {
if this == symbolType {
return true
}
}
return false
}
/*
Generally used when formatting type check errors.
We could store the stringified symbol somewhere else and not require a duplicated codeblock to translate
OperatorSymbol to string, but that would require more memory, and another field somewhere.
Adding operators is rare enough that we just stringify it here instead.
*/
func (this OperatorSymbol) String() string {
switch this {
case NOOP:
return "NOOP"
case VALUE:
return "VALUE"
case EQ:
return "="
case NEQ:
return "!="
case GT:
return ">"
case LT:
return "<"
case GTE:
return ">="
case LTE:
return "<="
case REQ:
return "=~"
case NREQ:
return "!~"
case AND:
return "&&"
case OR:
return "||"
case IN:
return "in"
case BITWISE_AND:
return "&"
case BITWISE_OR:
return "|"
case BITWISE_XOR:
return "^"
case BITWISE_LSHIFT:
return "<<"
case BITWISE_RSHIFT:
return ">>"
case PLUS:
return "+"
case MINUS:
return "-"
case MULTIPLY:
return "*"
case DIVIDE:
return "/"
case MODULUS:
return "%"
case EXPONENT:
return "**"
case NEGATE:
return "-"
case INVERT:
return "!"
case BITWISE_NOT:
return "~"
case TERNARY_TRUE:
return "?"
case TERNARY_FALSE:
return ":"
case COALESCE:
return "??"
}
return ""
}

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govaluate
====
[![Build Status](https://travis-ci.org/Knetic/govaluate.svg?branch=master)](https://travis-ci.org/Knetic/govaluate)
[![Godoc](https://godoc.org/github.com/Knetic/govaluate?status.png)](https://godoc.org/github.com/Knetic/govaluate)
Provides support for evaluating arbitrary C-like artithmetic/string expressions.
Why can't you just write these expressions in code?
--
Sometimes, you can't know ahead-of-time what an expression will look like, or you want those expressions to be configurable.
Perhaps you've got a set of data running through your application, and you want to allow your users to specify some validations to run on it before committing it to a database. Or maybe you've written a monitoring framework which is capable of gathering a bunch of metrics, then evaluating a few expressions to see if any metrics should be alerted upon, but the conditions for alerting are different for each monitor.
A lot of people wind up writing their own half-baked style of evaluation language that fits their needs, but isn't complete. Or they wind up baking the expression into the actual executable, even if they know it's subject to change. These strategies may work, but they take time to implement, time for users to learn, and induce technical debt as requirements change. This library is meant to cover all the normal C-like expressions, so that you don't have to reinvent one of the oldest wheels on a computer.
How do I use it?
--
You create a new EvaluableExpression, then call "Evaluate" on it.
```go
expression, err := govaluate.NewEvaluableExpression("10 > 0");
result, err := expression.Evaluate(nil);
// result is now set to "true", the bool value.
```
Cool, but how about with parameters?
```go
expression, err := govaluate.NewEvaluableExpression("foo > 0");
parameters := make(map[string]interface{}, 8)
parameters["foo"] = -1;
result, err := expression.Evaluate(parameters);
// result is now set to "false", the bool value.
```
That's cool, but we can almost certainly have done all that in code. What about a complex use case that involves some math?
```go
expression, err := govaluate.NewEvaluableExpression("(requests_made * requests_succeeded / 100) >= 90");
parameters := make(map[string]interface{}, 8)
parameters["requests_made"] = 100;
parameters["requests_succeeded"] = 80;
result, err := expression.Evaluate(parameters);
// result is now set to "false", the bool value.
```
Or maybe you want to check the status of an alive check ("smoketest") page, which will be a string?
```go
expression, err := govaluate.NewEvaluableExpression("http_response_body == 'service is ok'");
parameters := make(map[string]interface{}, 8)
parameters["http_response_body"] = "service is ok";
result, err := expression.Evaluate(parameters);
// result is now set to "true", the bool value.
```
These examples have all returned boolean values, but it's equally possible to return numeric ones.
```go
expression, err := govaluate.NewEvaluableExpression("(mem_used / total_mem) * 100");
parameters := make(map[string]interface{}, 8)
parameters["total_mem"] = 1024;
parameters["mem_used"] = 512;
result, err := expression.Evaluate(parameters);
// result is now set to "50.0", the float64 value.
```
You can also do date parsing, though the formats are somewhat limited. Stick to RF3339, ISO8061, unix date, or ruby date formats. If you're having trouble getting a date string to parse, check the list of formats actually used: [parsing.go:248](https://github.com/Knetic/govaluate/blob/0580e9b47a69125afa0e4ebd1cf93c49eb5a43ec/parsing.go#L258).
```go
expression, err := govaluate.NewEvaluableExpression("'2014-01-02' > '2014-01-01 23:59:59'");
result, err := expression.Evaluate(nil);
// result is now set to true
```
Expressions are parsed once, and can be re-used multiple times. Parsing is the compute-intensive phase of the process, so if you intend to use the same expression with different parameters, just parse it once. Like so;
```go
expression, err := govaluate.NewEvaluableExpression("response_time <= 100");
parameters := make(map[string]interface{}, 8)
for {
parameters["response_time"] = pingSomething();
result, err := expression.Evaluate(parameters)
}
```
The normal C-standard order of operators is respected. When writing an expression, be sure that you either order the operators correctly, or use parenthesis to clarify which portions of an expression should be run first.
Escaping characters
--
Sometimes you'll have parameters that have spaces, slashes, pluses, ampersands or some other character
that this library interprets as something special. For example, the following expression will not
act as one might expect:
"response-time < 100"
As written, the library will parse it as "[response] minus [time] is less than 100". In reality,
"response-time" is meant to be one variable that just happens to have a dash in it.
There are two ways to work around this. First, you can escape the entire parameter name:
"[response-time] < 100"
Or you can use backslashes to escape only the minus sign.
"response\\-time < 100"
Backslashes can be used anywhere in an expression to escape the very next character. Square bracketed parameter names can be used instead of plain parameter names at any time.
Functions
--
You may have cases where you want to call a function on a parameter during execution of the expression. Perhaps you want to aggregate some set of data, but don't know the exact aggregation you want to use until you're writing the expression itself. Or maybe you have a mathematical operation you want to perform, for which there is no operator; like `log` or `tan` or `sqrt`. For cases like this, you can provide a map of functions to `NewEvaluableExpressionWithFunctions`, which will then be able to use them during execution. For instance;
```go
functions := map[string]govaluate.ExpressionFunction {
"strlen": func(args ...interface{}) (interface{}, error) {
length := len(args[0].(string))
return (float64)(length), nil
},
}
expString := "strlen('someReallyLongInputString') <= 16"
expression, _ := govaluate.NewEvaluableExpressionWithFunctions(expString, functions)
result, _ := expression.Evaluate(nil)
// result is now "false", the boolean value
```
Functions can accept any number of arguments, correctly handles nested functions, and arguments can be of any type (even if none of this library's operators support evaluation of that type). For instance, each of these usages of functions in an expression are valid (assuming that the appropriate functions and parameters are given):
```go
"sqrt(x1 ** y1, x2 ** y2)"
"max(someValue, abs(anotherValue), 10 * lastValue)"
```
Functions cannot be passed as parameters, they must be known at the time when the expression is parsed, and are unchangeable after parsing.
What operators and types does this support?
--
* Modifiers: `+` `-` `/` `*` `&` `|` `^` `**` `%` `>>` `<<`
* Comparators: `>` `>=` `<` `<=` `==` `!=` `=~` `!~`
* Logical ops: `||` `&&`
* Numeric constants, as 64-bit floating point (`12345.678`)
* String constants (single quotes: `'foobar'`)
* Date constants (single quotes, using any permutation of RFC3339, ISO8601, ruby date, or unix date; date parsing is automatically tried with any string constant)
* Boolean constants: `true` `false`
* Parenthesis to control order of evaluation `(` `)`
* Arrays (anything separated by `,` within parenthesis: `(1, 2, 'foo')`)
* Prefixes: `!` `-` `~`
* Ternary conditional: `?` `:`
* Null coalescence: `??`
See [MANUAL.md](https://github.com/Knetic/govaluate/blob/master/MANUAL.md) for exacting details on what types each operator supports.
Types
--
Some operators don't make sense when used with some types. For instance, what does it mean to get the modulo of a string? What happens if you check to see if two numbers are logically AND'ed together?
Everyone has a different intuition about the answers to these questions. To prevent confusion, this library will _refuse to operate_ upon types for which there is not an unambiguous meaning for the operation. See [MANUAL.md](https://github.com/Knetic/govaluate/blob/master/MANUAL.md) for details about what operators are valid for which types.
Benchmarks
--
If you're concerned about the overhead of this library, a good range of benchmarks are built into this repo. You can run them with `go test -bench=.`. The library is built with an eye towards being quick, but has not been aggressively profiled and optimized. For most applications, though, it is completely fine.
For a very rough idea of performance, here are the results output from a benchmark run on a 3rd-gen Macbook Pro (Linux Mint 17.1).
```
BenchmarkSingleParse-12 1000000 1382 ns/op
BenchmarkSimpleParse-12 200000 10771 ns/op
BenchmarkFullParse-12 30000 49383 ns/op
BenchmarkEvaluationSingle-12 50000000 30.1 ns/op
BenchmarkEvaluationNumericLiteral-12 10000000 119 ns/op
BenchmarkEvaluationLiteralModifiers-12 10000000 236 ns/op
BenchmarkEvaluationParameters-12 5000000 260 ns/op
BenchmarkEvaluationParametersModifiers-12 3000000 547 ns/op
BenchmarkComplexExpression-12 2000000 963 ns/op
BenchmarkRegexExpression-12 100000 20357 ns/op
BenchmarkConstantRegexExpression-12 1000000 1392 ns/op
ok
```
API Breaks
--
While this library has very few cases which will ever result in an API break, it can (and [has](https://github.com/Knetic/govaluate/releases/tag/2.0.0)) happened. If you are using this in production, vendor the commit you've tested against, or use gopkg.in to redirect your import (e.g., `import "gopkg.in/Knetic/govaluate.v2"`). Master branch (while infrequent) _may_ at some point contain API breaking changes, and the author will have no way to communicate these to downstreams, other than creating a new major release.
Releases will explicitly state when an API break happens, and if they do not specify an API break it should be safe to upgrade.
License
--
This project is licensed under the MIT general use license. You're free to integrate, fork, and play with this code as you feel fit without consulting the author, as long as you provide proper credit to the author in your works.

72
vendor/github.com/Knetic/govaluate/TokenKind.go generated vendored Normal file
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package govaluate
/*
Represents all valid types of tokens that a token can be.
*/
type TokenKind int
const (
UNKNOWN TokenKind = iota
PREFIX
NUMERIC
BOOLEAN
STRING
PATTERN
TIME
VARIABLE
FUNCTION
SEPARATOR
COMPARATOR
LOGICALOP
MODIFIER
CLAUSE
CLAUSE_CLOSE
TERNARY
)
/*
GetTokenKindString returns a string that describes the given TokenKind.
e.g., when passed the NUMERIC TokenKind, this returns the string "NUMERIC".
*/
func (kind TokenKind) String() string {
switch kind {
case PREFIX:
return "PREFIX"
case NUMERIC:
return "NUMERIC"
case BOOLEAN:
return "BOOLEAN"
case STRING:
return "STRING"
case PATTERN:
return "PATTERN"
case TIME:
return "TIME"
case VARIABLE:
return "VARIABLE"
case FUNCTION:
return "FUNCTION"
case SEPARATOR:
return "SEPARATOR"
case COMPARATOR:
return "COMPARATOR"
case LOGICALOP:
return "LOGICALOP"
case MODIFIER:
return "MODIFIER"
case CLAUSE:
return "CLAUSE"
case CLAUSE_CLOSE:
return "CLAUSE_CLOSE"
case TERNARY:
return "TERNARY"
}
return "UNKNOWN"
}

359
vendor/github.com/Knetic/govaluate/evaluationStage.go generated vendored Normal file
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@ -0,0 +1,359 @@
package govaluate
import (
"errors"
"fmt"
"math"
"regexp"
"reflect"
)
const (
logicalErrorFormat string = "Value '%v' cannot be used with the logical operator '%v', it is not a bool"
modifierErrorFormat string = "Value '%v' cannot be used with the modifier '%v', it is not a number"
comparatorErrorFormat string = "Value '%v' cannot be used with the comparator '%v', it is not a number"
ternaryErrorFormat string = "Value '%v' cannot be used with the ternary operator '%v', it is not a bool"
prefixErrorFormat string = "Value '%v' cannot be used with the prefix '%v'"
)
type evaluationOperator func(left interface{}, right interface{}, parameters Parameters) (interface{}, error)
type stageTypeCheck func(value interface{}) bool
type stageCombinedTypeCheck func(left interface{}, right interface{}) bool
type evaluationStage struct {
symbol OperatorSymbol
leftStage, rightStage *evaluationStage
// the operation that will be used to evaluate this stage (such as adding [left] to [right] and return the result)
operator evaluationOperator
// ensures that both left and right values are appropriate for this stage. Returns an error if they aren't operable.
leftTypeCheck stageTypeCheck
rightTypeCheck stageTypeCheck
// if specified, will override whatever is used in "leftTypeCheck" and "rightTypeCheck".
// primarily used for specific operators that don't care which side a given type is on, but still requires one side to be of a given type
// (like string concat)
typeCheck stageCombinedTypeCheck
// regardless of which type check is used, this string format will be used as the error message for type errors
typeErrorFormat string
}
var (
_true = interface{}(true)
_false = interface{}(false)
)
func (this *evaluationStage) swapWith(other *evaluationStage) {
temp := *other
other.setToNonStage(*this)
this.setToNonStage(temp)
}
func (this *evaluationStage) setToNonStage(other evaluationStage) {
this.symbol = other.symbol
this.operator = other.operator
this.leftTypeCheck = other.leftTypeCheck
this.rightTypeCheck = other.rightTypeCheck
this.typeCheck = other.typeCheck
this.typeErrorFormat = other.typeErrorFormat
}
func (this *evaluationStage) isShortCircuitable() bool {
switch this.symbol {
case AND:
fallthrough
case OR:
fallthrough
case TERNARY_TRUE:
fallthrough
case TERNARY_FALSE:
fallthrough
case COALESCE:
return true
}
return false
}
func noopStageRight(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return right, nil
}
func addStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
// string concat if either are strings
if isString(left) || isString(right) {
return fmt.Sprintf("%v%v", left, right), nil
}
return left.(float64) + right.(float64), nil
}
func subtractStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return left.(float64) - right.(float64), nil
}
func multiplyStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return left.(float64) * right.(float64), nil
}
func divideStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return left.(float64) / right.(float64), nil
}
func exponentStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return math.Pow(left.(float64), right.(float64)), nil
}
func modulusStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return math.Mod(left.(float64), right.(float64)), nil
}
func gteStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if isString(left) && isString(right) {
return boolIface(left.(string) >= right.(string)), nil
}
return boolIface(left.(float64) >= right.(float64)), nil
}
func gtStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if isString(left) && isString(right) {
return boolIface(left.(string) > right.(string)), nil
}
return boolIface(left.(float64) > right.(float64)), nil
}
func lteStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if isString(left) && isString(right) {
return boolIface(left.(string) <= right.(string)), nil
}
return boolIface(left.(float64) <= right.(float64)), nil
}
func ltStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if isString(left) && isString(right) {
return boolIface(left.(string) < right.(string)), nil
}
return boolIface(left.(float64) < right.(float64)), nil
}
func equalStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return boolIface(reflect.DeepEqual(left, right)), nil
}
func notEqualStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return boolIface(!reflect.DeepEqual(left, right)), nil
}
func andStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return boolIface(left.(bool) && right.(bool)), nil
}
func orStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return boolIface(left.(bool) || right.(bool)), nil
}
func negateStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return -right.(float64), nil
}
func invertStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return boolIface(!right.(bool)), nil
}
func bitwiseNotStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(^int64(right.(float64))), nil
}
func ternaryIfStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if left.(bool) {
return right, nil
}
return nil, nil
}
func ternaryElseStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if left != nil {
return left, nil
}
return right, nil
}
func regexStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
var pattern *regexp.Regexp
var err error
switch right.(type) {
case string:
pattern, err = regexp.Compile(right.(string))
if err != nil {
return nil, errors.New(fmt.Sprintf("Unable to compile regexp pattern '%v': %v", right, err))
}
case *regexp.Regexp:
pattern = right.(*regexp.Regexp)
}
return pattern.Match([]byte(left.(string))), nil
}
func notRegexStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
ret, err := regexStage(left, right, parameters)
if err != nil {
return nil, err
}
return !(ret.(bool)), nil
}
func bitwiseOrStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(int64(left.(float64)) | int64(right.(float64))), nil
}
func bitwiseAndStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(int64(left.(float64)) & int64(right.(float64))), nil
}
func bitwiseXORStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(int64(left.(float64)) ^ int64(right.(float64))), nil
}
func leftShiftStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(uint64(left.(float64)) << uint64(right.(float64))), nil
}
func rightShiftStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return float64(uint64(left.(float64)) >> uint64(right.(float64))), nil
}
func makeParameterStage(parameterName string) evaluationOperator {
return func(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
value, err := parameters.Get(parameterName)
if err != nil {
return nil, err
}
return value, nil
}
}
func makeLiteralStage(literal interface{}) evaluationOperator {
return func(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
return literal, nil
}
}
func makeFunctionStage(function ExpressionFunction) evaluationOperator {
return func(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
if right == nil {
return function()
}
switch right.(type) {
case []interface{}:
return function(right.([]interface{})...)
default:
return function(right)
}
}
}
func separatorStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
var ret []interface{}
switch left.(type) {
case []interface{}:
ret = append(left.([]interface{}), right)
default:
ret = []interface{}{left, right}
}
return ret, nil
}
func inStage(left interface{}, right interface{}, parameters Parameters) (interface{}, error) {
for _, value := range right.([]interface{}) {
if left == value {
return true, nil
}
}
return false, nil
}
//
func isString(value interface{}) bool {
switch value.(type) {
case string:
return true
}
return false
}
func isRegexOrString(value interface{}) bool {
switch value.(type) {
case string:
return true
case *regexp.Regexp:
return true
}
return false
}
func isBool(value interface{}) bool {
switch value.(type) {
case bool:
return true
}
return false
}
func isFloat64(value interface{}) bool {
switch value.(type) {
case float64:
return true
}
return false
}
/*
Addition usually means between numbers, but can also mean string concat.
String concat needs one (or both) of the sides to be a string.
*/
func additionTypeCheck(left interface{}, right interface{}) bool {
if isFloat64(left) && isFloat64(right) {
return true
}
if !isString(left) && !isString(right) {
return false
}
return true
}
/*
Comparison can either be between numbers, or lexicographic between two strings,
but never between the two.
*/
func comparatorTypeCheck(left interface{}, right interface{}) bool {
if isFloat64(left) && isFloat64(right) {
return true
}
if isString(left) && isString(right) {
return true
}
return false
}
func isArray(value interface{}) bool {
switch value.(type) {
case []interface{}:
return true
}
return false
}
/*
Converting a boolean to an interface{} requires an allocation.
We can use interned bools to avoid this cost.
*/
func boolIface(b bool) interface{} {
if b {
return _true
}
return _false
}

8
vendor/github.com/Knetic/govaluate/expressionFunctions.go generated vendored Normal file
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@ -0,0 +1,8 @@
package govaluate
/*
Represents a function that can be called from within an expression.
This method must return an error if, for any reason, it is unable to produce exactly one unambiguous result.
An error returned will halt execution of the expression.
*/
type ExpressionFunction func(arguments ...interface{}) (interface{}, error)

46
vendor/github.com/Knetic/govaluate/expressionOutputStream.go generated vendored Normal file
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@ -0,0 +1,46 @@
package govaluate
import (
"bytes"
)
/*
Holds a series of "transactions" which represent each token as it is output by an outputter (such as ToSQLQuery()).
Some outputs (such as SQL) require a function call or non-c-like syntax to represent an expression.
To accomplish this, this struct keeps track of each translated token as it is output, and can return and rollback those transactions.
*/
type expressionOutputStream struct {
transactions []string
}
func (this *expressionOutputStream) add(transaction string) {
this.transactions = append(this.transactions, transaction)
}
func (this *expressionOutputStream) rollback() string {
index := len(this.transactions) - 1
ret := this.transactions[index]
this.transactions = this.transactions[:index]
return ret
}
func (this *expressionOutputStream) createString(delimiter string) string {
var retBuffer bytes.Buffer
var transaction string
penultimate := len(this.transactions) - 1
for i := 0; i < penultimate; i++ {
transaction = this.transactions[i]
retBuffer.WriteString(transaction)
retBuffer.WriteString(delimiter)
}
retBuffer.WriteString(this.transactions[penultimate])
return retBuffer.String()
}

350
vendor/github.com/Knetic/govaluate/lexerState.go generated vendored Normal file
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@ -0,0 +1,350 @@
package govaluate
import (
"errors"
"fmt"
)
type lexerState struct {
isEOF bool
isNullable bool
kind TokenKind
validNextKinds []TokenKind
}
// lexer states.
// Constant for all purposes except compiler.
var validLexerStates = []lexerState{
lexerState{
kind: UNKNOWN,
isEOF: false,
isNullable: true,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
VARIABLE,
PATTERN,
FUNCTION,
STRING,
TIME,
CLAUSE,
},
},
lexerState{
kind: CLAUSE,
isEOF: false,
isNullable: true,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
VARIABLE,
PATTERN,
FUNCTION,
STRING,
TIME,
CLAUSE,
CLAUSE_CLOSE,
},
},
lexerState{
kind: CLAUSE_CLOSE,
isEOF: true,
isNullable: true,
validNextKinds: []TokenKind{
COMPARATOR,
MODIFIER,
NUMERIC,
BOOLEAN,
VARIABLE,
STRING,
PATTERN,
TIME,
CLAUSE,
CLAUSE_CLOSE,
LOGICALOP,
TERNARY,
SEPARATOR,
},
},
lexerState{
kind: NUMERIC,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
TERNARY,
SEPARATOR,
},
},
lexerState{
kind: BOOLEAN,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
TERNARY,
SEPARATOR,
},
},
lexerState{
kind: STRING,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
TERNARY,
SEPARATOR,
},
},
lexerState{
kind: TIME,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
SEPARATOR,
},
},
lexerState{
kind: PATTERN,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
SEPARATOR,
},
},
lexerState{
kind: VARIABLE,
isEOF: true,
isNullable: false,
validNextKinds: []TokenKind{
MODIFIER,
COMPARATOR,
LOGICALOP,
CLAUSE_CLOSE,
TERNARY,
SEPARATOR,
},
},
lexerState{
kind: MODIFIER,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
VARIABLE,
FUNCTION,
STRING,
BOOLEAN,
CLAUSE,
CLAUSE_CLOSE,
},
},
lexerState{
kind: COMPARATOR,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
VARIABLE,
FUNCTION,
STRING,
TIME,
CLAUSE,
CLAUSE_CLOSE,
PATTERN,
},
},
lexerState{
kind: LOGICALOP,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
VARIABLE,
FUNCTION,
STRING,
TIME,
CLAUSE,
CLAUSE_CLOSE,
},
},
lexerState{
kind: PREFIX,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
NUMERIC,
BOOLEAN,
VARIABLE,
FUNCTION,
CLAUSE,
CLAUSE_CLOSE,
},
},
lexerState{
kind: TERNARY,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
STRING,
TIME,
VARIABLE,
FUNCTION,
CLAUSE,
SEPARATOR,
},
},
lexerState{
kind: FUNCTION,
isEOF: false,
isNullable: false,
validNextKinds: []TokenKind{
CLAUSE,
},
},
lexerState{
kind: SEPARATOR,
isEOF: false,
isNullable: true,
validNextKinds: []TokenKind{
PREFIX,
NUMERIC,
BOOLEAN,
STRING,
TIME,
VARIABLE,
FUNCTION,
CLAUSE,
},
},
}
func (this lexerState) canTransitionTo(kind TokenKind) bool {
for _, validKind := range this.validNextKinds {
if validKind == kind {
return true
}
}
return false
}
func checkExpressionSyntax(tokens []ExpressionToken) error {
var state lexerState
var lastToken ExpressionToken
var err error
state = validLexerStates[0]
for _, token := range tokens {
if !state.canTransitionTo(token.Kind) {
// call out a specific error for tokens looking like they want to be functions.
if lastToken.Kind == VARIABLE && token.Kind == CLAUSE {
return errors.New("Undefined function " + lastToken.Value.(string))
}
firstStateName := fmt.Sprintf("%s [%v]", state.kind.String(), lastToken.Value)
nextStateName := fmt.Sprintf("%s [%v]", token.Kind.String(), token.Value)
return errors.New("Cannot transition token types from " + firstStateName + " to " + nextStateName)
}
state, err = getLexerStateForToken(token.Kind)
if err != nil {
return err
}
if !state.isNullable && token.Value == nil {
errorMsg := fmt.Sprintf("Token kind '%v' cannot have a nil value", token.Kind.String())
return errors.New(errorMsg)
}
lastToken = token
}
if !state.isEOF {
return errors.New("Unexpected end of expression")
}
return nil
}
func getLexerStateForToken(kind TokenKind) (lexerState, error) {
for _, possibleState := range validLexerStates {
if possibleState.kind == kind {
return possibleState, nil
}
}
errorMsg := fmt.Sprintf("No lexer state found for token kind '%v'\n", kind.String())
return validLexerStates[0], errors.New(errorMsg)
}

39
vendor/github.com/Knetic/govaluate/lexerStream.go generated vendored Normal file
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@ -0,0 +1,39 @@
package govaluate
type lexerStream struct {
source []rune
position int
length int
}
func newLexerStream(source string) *lexerStream {
var ret *lexerStream
var runes []rune
for _, character := range source {
runes = append(runes, character)
}
ret = new(lexerStream)
ret.source = runes
ret.length = len(runes)
return ret
}
func (this *lexerStream) readCharacter() rune {
var character rune
character = this.source[this.position]
this.position += 1
return character
}
func (this *lexerStream) rewind(amount int) {
this.position -= amount
}
func (this lexerStream) canRead() bool {
return this.position < this.length
}

32
vendor/github.com/Knetic/govaluate/parameters.go generated vendored Normal file
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package govaluate
import (
"errors"
)
/*
Parameters is a collection of named parameters that can be used by an EvaluableExpression to retrieve parameters
when an expression tries to use them.
*/
type Parameters interface {
/*
Get gets the parameter of the given name, or an error if the parameter is unavailable.
Failure to find the given parameter should be indicated by returning an error.
*/
Get(name string) (interface{}, error)
}
type MapParameters map[string]interface{}
func (p MapParameters) Get(name string) (interface{}, error) {
value, found := p[name]
if !found {
errorMessage := "No parameter '" + name + "' found."
return nil, errors.New(errorMessage)
}
return value, nil
}

450
vendor/github.com/Knetic/govaluate/parsing.go generated vendored Normal file
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package govaluate
import (
"bytes"
"errors"
"fmt"
"regexp"
"strconv"
"time"
"unicode"
)
func parseTokens(expression string, functions map[string]ExpressionFunction) ([]ExpressionToken, error) {
var ret []ExpressionToken
var token ExpressionToken
var stream *lexerStream
var state lexerState
var err error
var found bool
stream = newLexerStream(expression)
state = validLexerStates[0]
for stream.canRead() {
token, err, found = readToken(stream, state, functions)
if err != nil {
return ret, err
}
if !found {
break
}
state, err = getLexerStateForToken(token.Kind)
if err != nil {
return ret, err
}
// append this valid token
ret = append(ret, token)
}
err = checkBalance(ret)
if err != nil {
return nil, err
}
return ret, nil
}
func readToken(stream *lexerStream, state lexerState, functions map[string]ExpressionFunction) (ExpressionToken, error, bool) {
var function ExpressionFunction
var ret ExpressionToken
var tokenValue interface{}
var tokenTime time.Time
var tokenString string
var kind TokenKind
var character rune
var found bool
var completed bool
var err error
// numeric is 0-9, or .
// string starts with '
// variable is alphanumeric, always starts with a letter
// bracket always means variable
// symbols are anything non-alphanumeric
// all others read into a buffer until they reach the end of the stream
for stream.canRead() {
character = stream.readCharacter()
if unicode.IsSpace(character) {
continue
}
kind = UNKNOWN
// numeric constant
if isNumeric(character) {
tokenString = readTokenUntilFalse(stream, isNumeric)
tokenValue, err = strconv.ParseFloat(tokenString, 64)
if err != nil {
errorMsg := fmt.Sprintf("Unable to parse numeric value '%v' to float64\n", tokenString)
return ExpressionToken{}, errors.New(errorMsg), false
}
kind = NUMERIC
break
}
// comma, separator
if character == ',' {
tokenValue = ","
kind = SEPARATOR
break
}
// escaped variable
if character == '[' {
tokenValue, completed = readUntilFalse(stream, true, false, true, isNotClosingBracket)
kind = VARIABLE
if !completed {
return ExpressionToken{}, errors.New("Unclosed parameter bracket"), false
}
// above method normally rewinds us to the closing bracket, which we want to skip.
stream.rewind(-1)
break
}
// regular variable - or function?
if unicode.IsLetter(character) {
tokenString = readTokenUntilFalse(stream, isVariableName)
tokenValue = tokenString
kind = VARIABLE
// boolean?
if tokenValue == "true" {
kind = BOOLEAN
tokenValue = true
} else {
if tokenValue == "false" {
kind = BOOLEAN
tokenValue = false
}
}
// textual operator?
if tokenValue == "in" || tokenValue == "IN" {
// force lower case for consistency
tokenValue = "in"
kind = COMPARATOR
}
// function?
function, found = functions[tokenString]
if found {
kind = FUNCTION
tokenValue = function
}
break
}
if !isNotQuote(character) {
tokenValue, completed = readUntilFalse(stream, true, false, true, isNotQuote)
if !completed {
return ExpressionToken{}, errors.New("Unclosed string literal"), false
}
// advance the stream one position, since reading until false assumes the terminator is a real token
stream.rewind(-1)
// check to see if this can be parsed as a time.
tokenTime, found = tryParseTime(tokenValue.(string))
if found {
kind = TIME
tokenValue = tokenTime
} else {
kind = STRING
}
break
}
if character == '(' {
tokenValue = character
kind = CLAUSE
break
}
if character == ')' {
tokenValue = character
kind = CLAUSE_CLOSE
break
}
// must be a known symbol
tokenString = readTokenUntilFalse(stream, isNotAlphanumeric)
tokenValue = tokenString
// quick hack for the case where "-" can mean "prefixed negation" or "minus", which are used
// very differently.
if state.canTransitionTo(PREFIX) {
_, found = prefixSymbols[tokenString]
if found {
kind = PREFIX
break
}
}
_, found = modifierSymbols[tokenString]
if found {
kind = MODIFIER
break
}
_, found = logicalSymbols[tokenString]
if found {
kind = LOGICALOP
break
}
_, found = comparatorSymbols[tokenString]
if found {
kind = COMPARATOR
break
}
_, found = ternarySymbols[tokenString]
if found {
kind = TERNARY
break
}
errorMessage := fmt.Sprintf("Invalid token: '%s'", tokenString)
return ret, errors.New(errorMessage), false
}
ret.Kind = kind
ret.Value = tokenValue
return ret, nil, (kind != UNKNOWN)
}
func readTokenUntilFalse(stream *lexerStream, condition func(rune) bool) string {
var ret string
stream.rewind(1)
ret, _ = readUntilFalse(stream, false, true, true, condition)
return ret
}
/*
Returns the string that was read until the given [condition] was false, or whitespace was broken.
Returns false if the stream ended before whitespace was broken or condition was met.
*/
func readUntilFalse(stream *lexerStream, includeWhitespace bool, breakWhitespace bool, allowEscaping bool, condition func(rune) bool) (string, bool) {
var tokenBuffer bytes.Buffer
var character rune
var conditioned bool
conditioned = false
for stream.canRead() {
character = stream.readCharacter()
// Use backslashes to escape anything
if allowEscaping && character == '\\' {
character = stream.readCharacter()
tokenBuffer.WriteString(string(character))
continue
}
if unicode.IsSpace(character) {
if breakWhitespace && tokenBuffer.Len() > 0 {
conditioned = true
break
}
if !includeWhitespace {
continue
}
}
if condition(character) {
tokenBuffer.WriteString(string(character))
} else {
conditioned = true
stream.rewind(1)
break
}
}
return tokenBuffer.String(), conditioned
}
/*
Checks to see if any optimizations can be performed on the given [tokens], which form a complete, valid expression.
The returns slice will represent the optimized (or unmodified) list of tokens to use.
*/
func optimizeTokens(tokens []ExpressionToken) ([]ExpressionToken, error) {
var token ExpressionToken
var symbol OperatorSymbol
var err error
var index int
for index, token = range tokens {
// if we find a regex operator, and the right-hand value is a constant, precompile and replace with a pattern.
if token.Kind != COMPARATOR {
continue
}
symbol = comparatorSymbols[token.Value.(string)]
if symbol != REQ && symbol != NREQ {
continue
}
index++
token = tokens[index]
if token.Kind == STRING {
token.Kind = PATTERN
token.Value, err = regexp.Compile(token.Value.(string))
if err != nil {
return tokens, err
}
tokens[index] = token
}
}
return tokens, nil
}
/*
Checks the balance of tokens which have multiple parts, such as parenthesis.
*/
func checkBalance(tokens []ExpressionToken) error {
var stream *tokenStream
var token ExpressionToken
var parens int
stream = newTokenStream(tokens)
for stream.hasNext() {
token = stream.next()
if token.Kind == CLAUSE {
parens++
continue
}
if token.Kind == CLAUSE_CLOSE {
parens--
continue
}
}
if parens != 0 {
return errors.New("Unbalanced parenthesis")
}
return nil
}
func isNumeric(character rune) bool {
return unicode.IsDigit(character) || character == '.'
}
func isNotQuote(character rune) bool {
return character != '\'' && character != '"'
}
func isNotAlphanumeric(character rune) bool {
return !(unicode.IsDigit(character) ||
unicode.IsLetter(character) ||
character == '(' ||
character == ')' ||
!isNotQuote(character))
}
func isVariableName(character rune) bool {
return unicode.IsLetter(character) ||
unicode.IsDigit(character) ||
character == '_'
}
func isNotClosingBracket(character rune) bool {
return character != ']'
}
/*
Attempts to parse the [candidate] as a Time.
Tries a series of standardized date formats, returns the Time if one applies,
otherwise returns false through the second return.
*/
func tryParseTime(candidate string) (time.Time, bool) {
var ret time.Time
var found bool
timeFormats := [...]string{
time.ANSIC,
time.UnixDate,
time.RubyDate,
time.Kitchen,
time.RFC3339,
time.RFC3339Nano,
"2006-01-02", // RFC 3339
"2006-01-02 15:04", // RFC 3339 with minutes
"2006-01-02 15:04:05", // RFC 3339 with seconds
"2006-01-02 15:04:05-07:00", // RFC 3339 with seconds and timezone
"2006-01-02T15Z0700", // ISO8601 with hour
"2006-01-02T15:04Z0700", // ISO8601 with minutes
"2006-01-02T15:04:05Z0700", // ISO8601 with seconds
"2006-01-02T15:04:05.999999999Z0700", // ISO8601 with nanoseconds
}
for _, format := range timeFormats {
ret, found = tryParseExactTime(candidate, format)
if found {
return ret, true
}
}
return time.Now(), false
}
func tryParseExactTime(candidate string, format string) (time.Time, bool) {
var ret time.Time
var err error
ret, err = time.ParseInLocation(format, candidate, time.Local)
if err != nil {
return time.Now(), false
}
return ret, true
}

71
vendor/github.com/Knetic/govaluate/sanitizedParameters.go generated vendored Normal file
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package govaluate
// sanitizedParameters is a wrapper for Parameters that does sanitization as
// parameters are accessed.
type sanitizedParameters struct {
orig Parameters
}
func (p sanitizedParameters) Get(key string) (interface{}, error) {
value, err := p.orig.Get(key)
if err != nil {
return nil, err
}
// should be converted to fixed point?
if isFixedPoint(value) {
return castFixedPoint(value), nil
}
return value, nil
}
func isFixedPoint(value interface{}) bool {
switch value.(type) {
case uint8:
return true
case uint16:
return true
case uint32:
return true
case uint64:
return true
case int8:
return true
case int16:
return true
case int32:
return true
case int64:
return true
case int:
return true
}
return false
}
func castFixedPoint(value interface{}) float64 {
switch value.(type) {
case uint8:
return float64(value.(uint8))
case uint16:
return float64(value.(uint16))
case uint32:
return float64(value.(uint32))
case uint64:
return float64(value.(uint64))
case int8:
return float64(value.(int8))
case int16:
return float64(value.(int16))
case int32:
return float64(value.(int32))
case int64:
return float64(value.(int64))
case int:
return float64(value.(int))
}
return 0.0
}

675
vendor/github.com/Knetic/govaluate/stagePlanner.go generated vendored Normal file
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package govaluate
import (
"errors"
"time"
"fmt"
)
var stageSymbolMap = map[OperatorSymbol]evaluationOperator{
EQ: equalStage,
NEQ: notEqualStage,
GT: gtStage,
LT: ltStage,
GTE: gteStage,
LTE: lteStage,
REQ: regexStage,
NREQ: notRegexStage,
AND: andStage,
OR: orStage,
IN: inStage,
BITWISE_OR: bitwiseOrStage,
BITWISE_AND: bitwiseAndStage,
BITWISE_XOR: bitwiseXORStage,
BITWISE_LSHIFT: leftShiftStage,
BITWISE_RSHIFT: rightShiftStage,
PLUS: addStage,
MINUS: subtractStage,
MULTIPLY: multiplyStage,
DIVIDE: divideStage,
MODULUS: modulusStage,
EXPONENT: exponentStage,
NEGATE: negateStage,
INVERT: invertStage,
BITWISE_NOT: bitwiseNotStage,
TERNARY_TRUE: ternaryIfStage,
TERNARY_FALSE: ternaryElseStage,
COALESCE: ternaryElseStage,
SEPARATE: separatorStage,
}
/*
A "precedent" is a function which will recursively parse new evaluateionStages from a given stream of tokens.
It's called a `precedent` because it is expected to handle exactly what precedence of operator,
and defer to other `precedent`s for other operators.
*/
type precedent func(stream *tokenStream) (*evaluationStage, error)
/*
A convenience function for specifying the behavior of a `precedent`.
Most `precedent` functions can be described by the same function, just with different type checks, symbols, and error formats.
This struct is passed to `makePrecedentFromPlanner` to create a `precedent` function.
*/
type precedencePlanner struct {
validSymbols map[string]OperatorSymbol
validKinds []TokenKind
typeErrorFormat string
next precedent
nextRight precedent
}
var planPrefix precedent
var planExponential precedent
var planMultiplicative precedent
var planAdditive precedent
var planBitwise precedent
var planShift precedent
var planComparator precedent
var planLogicalAnd precedent
var planLogicalOr precedent
var planTernary precedent
var planSeparator precedent
func init() {
// all these stages can use the same code (in `planPrecedenceLevel`) to execute,
// they simply need different type checks, symbols, and recursive precedents.
// While not all precedent phases are listed here, most can be represented this way.
planPrefix = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: prefixSymbols,
validKinds: []TokenKind{PREFIX},
typeErrorFormat: prefixErrorFormat,
nextRight: planFunction,
})
planExponential = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: exponentialSymbolsS,
validKinds: []TokenKind{MODIFIER},
typeErrorFormat: modifierErrorFormat,
next: planFunction,
})
planMultiplicative = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: multiplicativeSymbols,
validKinds: []TokenKind{MODIFIER},
typeErrorFormat: modifierErrorFormat,
next: planExponential,
})
planAdditive = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: additiveSymbols,
validKinds: []TokenKind{MODIFIER},
typeErrorFormat: modifierErrorFormat,
next: planMultiplicative,
})
planShift = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: bitwiseShiftSymbols,
validKinds: []TokenKind{MODIFIER},
typeErrorFormat: modifierErrorFormat,
next: planAdditive,
})
planBitwise = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: bitwiseSymbols,
validKinds: []TokenKind{MODIFIER},
typeErrorFormat: modifierErrorFormat,
next: planShift,
})
planComparator = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: comparatorSymbols,
validKinds: []TokenKind{COMPARATOR},
typeErrorFormat: comparatorErrorFormat,
next: planBitwise,
})
planLogicalAnd = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: map[string]OperatorSymbol{"&&": AND},
validKinds: []TokenKind{LOGICALOP},
typeErrorFormat: logicalErrorFormat,
next: planComparator,
})
planLogicalOr = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: map[string]OperatorSymbol{"||": OR},
validKinds: []TokenKind{LOGICALOP},
typeErrorFormat: logicalErrorFormat,
next: planLogicalAnd,
})
planTernary = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: ternarySymbols,
validKinds: []TokenKind{TERNARY},
typeErrorFormat: ternaryErrorFormat,
next: planLogicalOr,
})
planSeparator = makePrecedentFromPlanner(&precedencePlanner{
validSymbols: separatorSymbols,
validKinds: []TokenKind{SEPARATOR},
next: planTernary,
})
}
/*
Given a planner, creates a function which will evaluate a specific precedence level of operators,
and link it to other `precedent`s which recurse to parse other precedence levels.
*/
func makePrecedentFromPlanner(planner *precedencePlanner) precedent {
var generated precedent
var nextRight precedent
generated = func(stream *tokenStream) (*evaluationStage, error) {
return planPrecedenceLevel(
stream,
planner.typeErrorFormat,
planner.validSymbols,
planner.validKinds,
nextRight,
planner.next,
)
}
if planner.nextRight != nil {
nextRight = planner.nextRight
} else {
nextRight = generated
}
return generated
}
/*
Creates a `evaluationStageList` object which represents an execution plan (or tree)
which is used to completely evaluate a set of tokens at evaluation-time.
The three stages of evaluation can be thought of as parsing strings to tokens, then tokens to a stage list, then evaluation with parameters.
*/
func planStages(tokens []ExpressionToken) (*evaluationStage, error) {
stream := newTokenStream(tokens)
stage, err := planTokens(stream)
if err != nil {
return nil, err
}
// while we're now fully-planned, we now need to re-order same-precedence operators.
// this could probably be avoided with a different planning method
reorderStages(stage)
stage = elideLiterals(stage)
return stage, nil
}
func planTokens(stream *tokenStream) (*evaluationStage, error) {
if !stream.hasNext() {
return nil, nil
}
return planSeparator(stream)
}
/*
The most usual method of parsing an evaluation stage for a given precedence.
Most stages use the same logic
*/
func planPrecedenceLevel(
stream *tokenStream,
typeErrorFormat string,
validSymbols map[string]OperatorSymbol,
validKinds []TokenKind,
rightPrecedent precedent,
leftPrecedent precedent) (*evaluationStage, error) {
var token ExpressionToken
var symbol OperatorSymbol
var leftStage, rightStage *evaluationStage
var checks typeChecks
var err error
var keyFound bool
if leftPrecedent != nil {
leftStage, err = leftPrecedent(stream)
if err != nil {
return nil, err
}
}
for stream.hasNext() {
token = stream.next()
if len(validKinds) > 0 {
keyFound = false
for _, kind := range validKinds {
if kind == token.Kind {
keyFound = true
break
}
}
if !keyFound {
break
}
}
if validSymbols != nil {
if !isString(token.Value) {
break
}
symbol, keyFound = validSymbols[token.Value.(string)]
if !keyFound {
break
}
}
if rightPrecedent != nil {
rightStage, err = rightPrecedent(stream)
if err != nil {
return nil, err
}
}
checks = findTypeChecks(symbol)
return &evaluationStage{
symbol: symbol,
leftStage: leftStage,
rightStage: rightStage,
operator: stageSymbolMap[symbol],
leftTypeCheck: checks.left,
rightTypeCheck: checks.right,
typeCheck: checks.combined,
typeErrorFormat: typeErrorFormat,
}, nil
}
stream.rewind()
return leftStage, nil
}
/*
A special case where functions need to be of higher precedence than values, and need a special wrapped execution stage operator.
*/
func planFunction(stream *tokenStream) (*evaluationStage, error) {
var token ExpressionToken
var rightStage *evaluationStage
var err error
token = stream.next()
if token.Kind != FUNCTION {
stream.rewind()
return planValue(stream)
}
rightStage, err = planValue(stream)
if err != nil {
return nil, err
}
return &evaluationStage{
symbol: FUNCTIONAL,
rightStage: rightStage,
operator: makeFunctionStage(token.Value.(ExpressionFunction)),
typeErrorFormat: "Unable to run function '%v': %v",
}, nil
}
/*
A truly special precedence function, this handles all the "lowest-case" errata of the process, including literals, parmeters,
clauses, and prefixes.
*/
func planValue(stream *tokenStream) (*evaluationStage, error) {
var token ExpressionToken
var symbol OperatorSymbol
var ret *evaluationStage
var operator evaluationOperator
var err error
token = stream.next()
switch token.Kind {
case CLAUSE:
ret, err = planTokens(stream)
if err != nil {
return nil, err
}
// advance past the CLAUSE_CLOSE token. We know that it's a CLAUSE_CLOSE, because at parse-time we check for unbalanced parens.
stream.next()
// the stage we got represents all of the logic contained within the parens
// but for technical reasons, we need to wrap this stage in a "noop" stage which breaks long chains of precedence.
// see github #33.
ret = &evaluationStage {
rightStage: ret,
operator: noopStageRight,
symbol: NOOP,
}
return ret, nil
case CLAUSE_CLOSE:
// when functions have empty params, this will be hit. In this case, we don't have any evaluation stage to do,
// so we just return nil so that the stage planner continues on its way.
stream.rewind()
return nil, nil
case VARIABLE:
operator = makeParameterStage(token.Value.(string))
case NUMERIC:
fallthrough
case STRING:
fallthrough
case PATTERN:
fallthrough
case BOOLEAN:
symbol = LITERAL
operator = makeLiteralStage(token.Value)
case TIME:
symbol = LITERAL
operator = makeLiteralStage(float64(token.Value.(time.Time).Unix()))
case PREFIX:
stream.rewind()
return planPrefix(stream)
}
if operator == nil {
errorMsg := fmt.Sprintf("Unable to plan token kind: '%s', value: '%v'", token.Kind.String(), token.Value)
return nil, errors.New(errorMsg)
}
return &evaluationStage{
symbol: symbol,
operator: operator,
}, nil
}
/*
Convenience function to pass a triplet of typechecks between `findTypeChecks` and `planPrecedenceLevel`.
Each of these members may be nil, which indicates that type does not matter for that value.
*/
type typeChecks struct {
left stageTypeCheck
right stageTypeCheck
combined stageCombinedTypeCheck
}
/*
Maps a given [symbol] to a set of typechecks to be used during runtime.
*/
func findTypeChecks(symbol OperatorSymbol) typeChecks {
switch symbol {
case GT:
fallthrough
case LT:
fallthrough
case GTE:
fallthrough
case LTE:
return typeChecks{
combined: comparatorTypeCheck,
}
case REQ:
fallthrough
case NREQ:
return typeChecks{
left: isString,
right: isRegexOrString,
}
case AND:
fallthrough
case OR:
return typeChecks{
left: isBool,
right: isBool,
}
case IN:
return typeChecks{
right: isArray,
}
case BITWISE_LSHIFT:
fallthrough
case BITWISE_RSHIFT:
fallthrough
case BITWISE_OR:
fallthrough
case BITWISE_AND:
fallthrough
case BITWISE_XOR:
return typeChecks{
left: isFloat64,
right: isFloat64,
}
case PLUS:
return typeChecks{
combined: additionTypeCheck,
}
case MINUS:
fallthrough
case MULTIPLY:
fallthrough
case DIVIDE:
fallthrough
case MODULUS:
fallthrough
case EXPONENT:
return typeChecks{
left: isFloat64,
right: isFloat64,
}
case NEGATE:
return typeChecks{
right: isFloat64,
}
case INVERT:
return typeChecks{
right: isBool,
}
case BITWISE_NOT:
return typeChecks{
right: isFloat64,
}
case TERNARY_TRUE:
return typeChecks{
left: isBool,
}
// unchecked cases
case EQ:
fallthrough
case NEQ:
return typeChecks{}
case TERNARY_FALSE:
fallthrough
case COALESCE:
fallthrough
default:
return typeChecks{}
}
}
/*
During stage planning, stages of equal precedence are parsed such that they'll be evaluated in reverse order.
For commutative operators like "+" or "-", it's no big deal. But for order-specific operators, it ruins the expected result.
*/
func reorderStages(rootStage *evaluationStage) {
// traverse every rightStage until we find multiples in a row of the same precedence.
var identicalPrecedences []*evaluationStage
var currentStage, nextStage *evaluationStage
var precedence, currentPrecedence operatorPrecedence
nextStage = rootStage
precedence = findOperatorPrecedenceForSymbol(rootStage.symbol)
for nextStage != nil {
currentStage = nextStage
nextStage = currentStage.rightStage
// left depth first, since this entire method only looks for precedences down the right side of the tree
if currentStage.leftStage != nil {
reorderStages(currentStage.leftStage)
}
currentPrecedence = findOperatorPrecedenceForSymbol(currentStage.symbol)
if currentPrecedence == precedence {
identicalPrecedences = append(identicalPrecedences, currentStage)
continue
}
// precedence break.
// See how many in a row we had, and reorder if there's more than one.
if len(identicalPrecedences) > 1 {
mirrorStageSubtree(identicalPrecedences)
}
identicalPrecedences = []*evaluationStage{currentStage}
precedence = currentPrecedence
}
if len(identicalPrecedences) > 1 {
mirrorStageSubtree(identicalPrecedences)
}
}
/*
Performs a "mirror" on a subtree of stages.
This mirror functionally inverts the order of execution for all members of the [stages] list.
That list is assumed to be a root-to-leaf (ordered) list of evaluation stages, where each is a right-hand stage of the last.
*/
func mirrorStageSubtree(stages []*evaluationStage) {
var rootStage, inverseStage, carryStage, frontStage *evaluationStage
stagesLength := len(stages)
// reverse all right/left
for _, frontStage = range stages {
carryStage = frontStage.rightStage
frontStage.rightStage = frontStage.leftStage
frontStage.leftStage = carryStage
}
// end left swaps with root right
rootStage = stages[0]
frontStage = stages[stagesLength-1]
carryStage = frontStage.leftStage
frontStage.leftStage = rootStage.rightStage
rootStage.rightStage = carryStage
// for all non-root non-end stages, right is swapped with inverse stage right in list
for i := 0; i < (stagesLength-2)/2+1; i++ {
frontStage = stages[i+1]
inverseStage = stages[stagesLength-i-1]
carryStage = frontStage.rightStage
frontStage.rightStage = inverseStage.rightStage
inverseStage.rightStage = carryStage
}
// swap all other information with inverse stages
for i := 0; i < stagesLength/2; i++ {
frontStage = stages[i]
inverseStage = stages[stagesLength-i-1]
frontStage.swapWith(inverseStage)
}
}
/*
Recurses through all operators in the entire tree, eliding operators where both sides are literals.
*/
func elideLiterals(root *evaluationStage) *evaluationStage {
if root.leftStage != nil {
root.leftStage = elideLiterals(root.leftStage)
}
if root.rightStage != nil {
root.rightStage = elideLiterals(root.rightStage)
}
return elideStage(root)
}
/*
Elides a specific stage, if possible.
Returns the unmodified [root] stage if it cannot or should not be elided.
Otherwise, returns a new stage representing the condensed value from the elided stages.
*/
func elideStage(root *evaluationStage) *evaluationStage {
var leftValue, rightValue, result interface{}
var err error
// right side must be a non-nil value. Left side must be nil or a value.
if root.rightStage == nil ||
root.rightStage.symbol != LITERAL ||
root.leftStage == nil ||
root.leftStage.symbol != LITERAL {
return root
}
// don't elide some operators
switch root.symbol {
case SEPARATE:
fallthrough
case IN:
return root
}
// both sides are values, get their actual values.
// errors should be near-impossible here. If we encounter them, just abort this optimization.
leftValue, err = root.leftStage.operator(nil, nil, nil)
if err != nil {
return root
}
rightValue, err = root.rightStage.operator(nil, nil, nil)
if err != nil {
return root
}
// typcheck, since the grammar checker is a bit loose with which operator symbols go together.
err = typeCheck(root.leftTypeCheck, leftValue, root.symbol, root.typeErrorFormat)
if err != nil {
return root
}
err = typeCheck(root.rightTypeCheck, rightValue, root.symbol, root.typeErrorFormat)
if err != nil {
return root
}
if root.typeCheck != nil && !root.typeCheck(leftValue, rightValue) {
return root
}
// pre-calculate, and return a new stage representing the result.
result, err = root.operator(leftValue, rightValue, nil)
if err != nil {
return root
}
return &evaluationStage {
symbol: LITERAL,
operator: makeLiteralStage(result),
}
}

32
vendor/github.com/Knetic/govaluate/test.sh generated vendored Normal file
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#!/bin/bash
# Script that runs tests, code coverage, and benchmarks all at once.
# Builds a symlink in /tmp, mostly to avoid messing with GOPATH at the user's shell level.
TEMPORARY_PATH="/tmp/govaluate_test"
SRC_PATH="${TEMPORARY_PATH}/src"
FULL_PATH="${TEMPORARY_PATH}/src/govaluate"
# set up temporary directory
rm -rf "${FULL_PATH}"
mkdir -p "${SRC_PATH}"
ln -s $(pwd) "${FULL_PATH}"
export GOPATH="${TEMPORARY_PATH}"
pushd "${TEMPORARY_PATH}/src/govaluate"
# run the actual tests.
export GOVALUATE_TORTURE_TEST="true"
go test -bench=. -benchmem -coverprofile coverage.out
status=$?
if [ "${status}" != 0 ];
then
exit $status
fi
# coverage
go tool cover -func=coverage.out
popd

36
vendor/github.com/Knetic/govaluate/tokenStream.go generated vendored Normal file
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package govaluate
type tokenStream struct {
tokens []ExpressionToken
index int
tokenLength int
}
func newTokenStream(tokens []ExpressionToken) *tokenStream {
var ret *tokenStream
ret = new(tokenStream)
ret.tokens = tokens
ret.tokenLength = len(tokens)
return ret
}
func (this *tokenStream) rewind() {
this.index -= 1
}
func (this *tokenStream) next() ExpressionToken {
var token ExpressionToken
token = this.tokens[this.index]
this.index += 1
return token
}
func (this tokenStream) hasNext() bool {
return this.index < this.tokenLength
}

22
vendor/github.com/beego/goyaml2/.gitignore generated vendored Normal file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe

4
vendor/github.com/beego/goyaml2/README.md generated vendored Normal file
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goyaml2
=======
YAML for Golang

41
vendor/github.com/beego/goyaml2/conv.go generated vendored Normal file
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package goyaml2
import (
"regexp"
"strconv"
//"time"
)
var (
RE_INT, _ = regexp.Compile("^[0-9,]+$")
RE_FLOAT, _ = regexp.Compile("^[0-9]+[.][0-9]+$")
RE_DATE, _ = regexp.Compile("^[0-9]{4}-[0-9]{2}-[0-9]{2}$")
RE_TIME, _ = regexp.Compile("^[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}$")
)
func string2Val(str string) interface{} {
tmp := []byte(str)
switch {
case str == "false":
return false
case str == "true":
return true
case RE_INT.Match(tmp):
// TODO check err
_int, _ := strconv.ParseInt(str, 10, 64)
return _int
case RE_FLOAT.Match(tmp):
_float, _ := strconv.ParseFloat(str, 64)
return _float
//TODO support time or Not?
/*
case RE_DATE.Match(tmp):
_date, _ := time.Parse("2006-01-02", str)
return _date
case RE_TIME.Match(tmp):
_time, _ := time.Parse("2006-01-02 03:04:05", str)
return _time
*/
}
return str
}

433
vendor/github.com/beego/goyaml2/reader.go generated vendored Normal file
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package goyaml2
import (
"bufio"
"fmt"
"github.com/wendal/errors"
"io"
"log"
"strings"
)
const (
DEBUG = true
MAP_KEY_ONLY = iota
)
func Read(r io.Reader) (interface{}, error) {
yr := &yamlReader{}
yr.br = bufio.NewReader(r)
obj, err := yr.ReadObject(0)
if err == io.EOF {
err = nil
}
if obj == nil {
log.Println("Obj == nil")
}
return obj, err
}
type yamlReader struct {
br *bufio.Reader
nodes []interface{}
lineNum int
lastLine string
}
func (y *yamlReader) ReadObject(minIndent int) (interface{}, error) {
line, err := y.NextLine()
if err != nil {
if err == io.EOF && line != "" {
//log.Println("Read EOF , but still some data here")
} else {
//log.Println("ReadERR", err)
return nil, err
}
}
y.lastLine = line
indent, str := getIndent(line)
if indent < minIndent {
//log.Println("Current Indent Unexpect : ", str, indent, minIndent)
return nil, y.Error("Unexpect Indent", nil)
}
if indent > minIndent {
//log.Println("Change minIndent from %d to %d", minIndent, indent)
minIndent = indent
}
switch str[0] {
case '-':
return y.ReadList(minIndent)
case '[':
fallthrough
case '{':
y.lastLine = ""
_, value, err := y.asMapKeyValue("tmp:" + str)
if err != nil {
return nil, y.Error("Err inline map/list", nil)
}
return value, nil
}
//log.Println("Read Objcet as Map", indent, str)
return y.ReadMap(minIndent)
}
func (y *yamlReader) ReadList(minIndent int) ([]interface{}, error) {
list := []interface{}{}
for {
line, err := y.NextLine()
if err != nil {
return list, err
}
indent, str := getIndent(line)
switch {
case indent < minIndent:
y.lastLine = line
if len(list) == 0 {
return nil, nil
}
return list, nil
case indent == minIndent:
if str[0] != '-' {
y.lastLine = line
return list, nil
}
if len(str) < 2 {
return nil, y.Error("ListItem is Emtry", nil)
}
key, value, err := y.asMapKeyValue(str[1:])
if err != nil {
return nil, err
}
switch value {
case nil:
list = append(list, key)
case MAP_KEY_ONLY:
return nil, y.Error("Not support List-Map yet", nil)
default:
_map := map[string]interface{}{key.(string): value}
list = append(list, _map)
_line, _err := y.NextLine()
if _err != nil && _err != io.EOF {
return nil, err
}
if _line == "" {
return list, nil
}
y.lastLine = _line
_indent, _str := getIndent(line)
if _indent >= minIndent+2 {
switch _str[0] {
case '-':
return nil, y.Error("Unexpect", nil)
case '[':
return nil, y.Error("Unexpect", nil)
case '{':
return nil, y.Error("Unexpect", nil)
}
// look like a map
_map2, _err := y.ReadMap(_indent)
if _map2 != nil {
_map2[key.(string)] = value
}
if err != nil {
return list, _err
}
}
}
continue
default:
return nil, y.Error("Bad Indent\n"+line, nil)
}
}
panic("ERROR")
return nil, errors.New("Impossible")
}
func (y *yamlReader) ReadMap(minIndent int) (map[string]interface{}, error) {
_map := map[string]interface{}{}
//log.Println("ReadMap", minIndent)
OUT:
for {
line, err := y.NextLine()
if err != nil {
return _map, err
}
indent, str := getIndent(line)
//log.Printf("Indent : %d, str = %s", indent, str)
switch {
case indent < minIndent:
y.lastLine = line
if len(_map) == 0 {
return nil, nil
}
return _map, nil
case indent == minIndent:
key, value, err := y.asMapKeyValue(str)
if err != nil {
return nil, err
}
//log.Println("Key=", key, "value=", value)
switch value {
case nil:
return nil, y.Error("Unexpect", nil)
case MAP_KEY_ONLY:
//log.Println("KeyOnly, read inner Map", key)
//--------------------------------------
_line, err := y.NextLine()
if err != nil {
if err == io.EOF {
if _line == "" {
// Emtry map item?
_map[key.(string)] = nil
return _map, err
}
} else {
return nil, y.Error("ERR?", err)
}
}
y.lastLine = _line
_indent, _str := getIndent(_line)
if _indent < minIndent {
return _map, nil
}
////log.Println("##>>", _indent, _str)
if _indent == minIndent {
if _str[0] == '-' {
//log.Println("Read Same-Indent ListItem for Map")
_list, err := y.ReadList(minIndent)
if _list != nil {
_map[key.(string)] = _list
}
if err != nil {
return _map, nil
}
continue OUT
} else {
// Emtry map item?
_map[key.(string)] = nil
continue OUT
}
}
//--------------------------------------
//log.Println("Read Map Item", _indent, _str)
obj, err := y.ReadObject(_indent)
if obj != nil {
_map[key.(string)] = obj
}
if err != nil {
return _map, err
}
default:
_map[key.(string)] = value
}
default:
//log.Println("Bad", indent, str)
return nil, y.Error("Bad Indent\n"+line, nil)
}
}
panic("ERROR")
return nil, errors.New("Impossible")
}
func (y *yamlReader) NextLine() (line string, err error) {
if y.lastLine != "" {
line = y.lastLine
y.lastLine = ""
//log.Println("Return lastLine", line)
return
}
for {
line, err = y.br.ReadString('\n')
y.lineNum++
if err != nil {
return
}
if strings.HasPrefix(line, "---") || strings.HasPrefix(line, "#") {
continue
}
line = strings.TrimRight(line, "\n\t\r ")
if line == "" {
continue
}
//log.Println("Return Line", line)
return
}
//log.Println("Impossbible : " + line)
return // impossbile!
}
func getIndent(str string) (int, string) {
indent := 0
for i, s := range str {
switch s {
case ' ':
indent++
case '\t':
indent += 4
default:
return indent, str[i:]
}
}
panic("Invalid indent : " + str)
return -1, ""
}
func (y *yamlReader) asMapKeyValue(str string) (key interface{}, val interface{}, err error) {
tokens := splitToken(str)
key = tokens[0]
if len(tokens) == 1 {
return key, nil, nil
}
if tokens[1] != ":" {
return "", nil, y.Error("Unexpect "+str, nil)
}
if len(tokens) == 2 {
return key, MAP_KEY_ONLY, nil
}
if len(tokens) == 3 {
return key, tokens[2], nil
}
switch tokens[2] {
case "[":
list := []interface{}{}
for i := 3; i < len(tokens)-1; i++ {
list = append(list, tokens[i])
}
return key, list, nil
case "{":
_map := map[string]interface{}{}
for i := 3; i < len(tokens)-1; i += 4 {
//log.Println(">>>", i, tokens[i])
if i > len(tokens)-2 {
return "", nil, y.Error("Unexpect "+str, nil)
}
if tokens[i+1] != ":" {
return "", nil, y.Error("Unexpect "+str, nil)
}
_map[tokens[i].(string)] = tokens[i+2]
if (i + 3) < (len(tokens) - 1) {
if tokens[i+3] != "," {
return "", "", y.Error("Unexpect "+str, nil)
}
} else {
break
}
}
return key, _map, nil
}
//log.Println(str, tokens)
return "", nil, y.Error("Unexpect "+str, nil)
}
func splitToken(str string) (tokens []interface{}) {
str = strings.Trim(str, "\r\t\n ")
if str == "" {
panic("Impossbile")
return
}
tokens = []interface{}{}
lastPos := 0
for i := 0; i < len(str); i++ {
switch str[i] {
case ':':
fallthrough
case '{':
fallthrough
case '[':
fallthrough
case '}':
fallthrough
case ']':
fallthrough
case ',':
if i > lastPos {
tokens = append(tokens, str[lastPos:i])
}
tokens = append(tokens, str[i:i+1])
lastPos = i + 1
case ' ':
if i > lastPos {
tokens = append(tokens, str[lastPos:i])
}
lastPos = i + 1
case '\'':
//log.Println("Scan End of String")
i++
start := i
for ; i < len(str); i++ {
if str[i] == '\'' {
//log.Println("Found End of String", start, i)
break
}
}
tokens = append(tokens, str[start:i])
lastPos = i + 1
case '"':
i++
start := i
for ; i < len(str); i++ {
if str[i] == '"' {
break
}
}
tokens = append(tokens, str[start:i])
lastPos = i + 1
}
}
////log.Println("last", lastPos)
if lastPos < len(str) {
tokens = append(tokens, str[lastPos:])
}
if len(tokens) == 1 {
tokens[0] = string2Val(tokens[0].(string))
return
}
if tokens[1] == ":" {
if len(tokens) == 2 {
return
}
if tokens[2] == "{" || tokens[2] == "[" {
return
}
str = strings.Trim(strings.SplitN(str, ":", 2)[1], "\t ")
if len(str) > 2 {
if str[0] == '\'' && str[len(str)-1] == '\'' {
str = str[1 : len(str)-1]
} else if str[0] == '"' && str[len(str)-1] == '"' {
str = str[1 : len(str)-1]
}
}
val := string2Val(str)
tokens = []interface{}{tokens[0], tokens[1], val}
return
}
if len(str) > 2 {
if str[0] == '\'' && str[len(str)-1] == '\'' {
str = str[1 : len(str)-1]
} else if str[0] == '"' && str[len(str)-1] == '"' {
str = str[1 : len(str)-1]
}
}
val := string2Val(str)
tokens = []interface{}{val}
return
}
func (y *yamlReader) Error(msg string, err error) error {
if err != nil {
return errors.New(fmt.Sprintf("line %d : %s : %v", y.lineNum, msg, err.Error()))
}
return errors.New(fmt.Sprintf("line %d >> %s", y.lineNum, msg))
}

29
vendor/github.com/beego/goyaml2/types.go generated vendored Normal file
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package goyaml2
const (
N_Map = iota
N_List
N_String
)
type Node interface {
Type() int
}
type MapNode map[string]interface{}
type ListNode []interface{}
type StringNode string
func (m *MapNode) Type() int {
return N_Map
}
func (l *ListNode) Type() int {
return N_List
}
func (s *StringNode) Type() int {
return N_String
}

9
vendor/github.com/beego/goyaml2/writer.go generated vendored Normal file
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package goyaml2
import (
"io"
)
func Write(w io.Writer, v interface{}) error {
return nil
}

28
vendor/github.com/beego/x2j/LICENSE generated vendored Normal file
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Copyright (c) 2012-2013 Charles Banning <clbanning@gmail.com>.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

157
vendor/github.com/beego/x2j/README generated vendored Normal file
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x2j.go - Unmarshal dynamic / arbitrary XML docs and extract values (using wildcards, if necessary).
ANNOUNCEMENTS
20 December 2013:
Non-UTF8 character sets supported via the X2jCharsetReader variable.
12 December 2013:
For symmetry, the package j2x has functions that marshal JSON strings and
map[string]interface{} values to XML encoded strings: http://godoc.org/github.com/clbanning/j2x.
Also, ToTree(), ToMap(), ToJson(), ToJsonIndent(), ReaderValuesFromTagPath() and ReaderValuesForTag() use io.Reader instead of string or []byte.
If you want to process a stream of XML messages check out XmlMsgsFromReader().
MOTIVATION
I make extensive use of JSON for messaging and typically unmarshal the messages into
map[string]interface{} variables. This is easily done using json.Unmarshal from the
standard Go libraries. Unfortunately, many legacy solutions use structured
XML messages; in those environments the applications would have to be refitted to
interoperate with my components.
The better solution is to just provide an alternative HTTP handler that receives
XML doc messages and parses it into a map[string]interface{} variable and then reuse
all the JSON-based code. The Go xml.Unmarshal() function does not provide the same
option of unmarshaling XML messages into map[string]interface{} variables. So I wrote
a couple of small functions to fill this gap.
Of course, once the XML doc was unmarshal'd into a map[string]interface{} variable it
was just a matter of calling json.Marshal() to provide it as a JSON string. Hence 'x2j'
rather than just 'x2m'.
USAGE
The package is fairly well self-documented. (http://godoc.org/github.com/clbanning/x2j)
The one really useful function is:
- Unmarshal(doc []byte, v interface{}) error
where v is a pointer to a variable of type 'map[string]interface{}', 'string', or
any other type supported by xml.Unmarshal().
To retrieve a value for specific tag use:
- DocValue(doc, path string, attrs ...string) (interface{},error)
- MapValue(m map[string]interface{}, path string, attr map[string]interface{}, recast ...bool) (interface{}, error)
The 'path' argument is a period-separated tag hierarchy - also known as dot-notation.
It is the program's responsibility to cast the returned value to the proper type; possible
types are the normal JSON unmarshaling types: string, float64, bool, []interface, map[string]interface{}.
To retrieve all values associated with a tag occurring anywhere in the XML document use:
- ValuesForTag(doc, tag string) ([]interface{}, error)
- ValuesForKey(m map[string]interface{}, key string) []interface{}
Demos: http://play.golang.org/p/m8zP-cpk0O
http://play.golang.org/p/cIteTS1iSg
http://play.golang.org/p/vd8pMiI21b
Returned values should be one of map[string]interface, []interface{}, or string.
All the values assocated with a tag-path that may include one or more wildcard characters -
'*' - can also be retrieved using:
- ValuesFromTagPath(doc, path string, getAttrs ...bool) ([]interface{}, error)
- ValuesFromKeyPath(map[string]interface{}, path string, getAttrs ...bool) []interface{}
Demos: http://play.golang.org/p/kUQnZ8VuhS
http://play.golang.org/p/l1aMHYtz7G
NOTE: care should be taken when using "*" at the end of a path - i.e., "books.book.*". See
the x2jpath_test.go case on how the wildcard returns all key values and collapses list values;
the same message structure can load a []interface{} or a map[string]interface{} (or an interface{})
value for a tag.
See the test cases in "x2jpath_test.go" and programs in "example" subdirectory for more.
XML PARSING CONVENTIONS
- Attributes are parsed to map[string]interface{} values by prefixing a hyphen, '-',
to the attribute label.
- If the element is a simple element and has attributes, the element value
is given the key '#text' for its map[string]interface{} representation. (See
the 'atomFeedString.xml' test data, below.)
BULK PROCESSING OF MESSAGE FILES
Sometime messages may be logged into files for transmission via FTP (e.g.) and subsequent
processing. You can use the bulk XML message processor to convert files of XML messages into
map[string]interface{} values with custom processing and error handler functions. See
the notes and test code for:
- XmlMsgsFromFile(fname string, phandler func(map[string]interface{}) bool, ehandler func(error) bool,recast ...bool) error
IMPLEMENTATION NOTES
Nothing fancy here, just brute force.
- Use xml.Decoder to parse the XML doc and build a tree.
- Walk the tree and load values into a map[string]interface{} variable, 'm', as
appropriate.
- Use json.Marshaler to convert 'm' to JSON.
As for testing:
- Copy an XML doc into 'x2j_test.xml'.
- Run "go test" and you'll get a full dump.
("pathTestString.xml" and "atomFeedString.xml" are test data from "read_test.go"
in the encoding/xml directory of the standard package library.)
USES
- putting a XML API on our message hub middleware (http://jsonhub.net)
- loading XML data into NoSQL database, such as, mongoDB
PERFORMANCE IMPROVEMENTS WITH GO 1.1 and 1.2
Upgrading to Go 1.1 environment results in performance improvements for XML and JSON
unmarshalling, in general. The x2j package gets an average performance boost of 40%.
----- Go 1.0.2 ----- ----------- Go 1.1 -----------
iterations ns/op iterations ns/op % improved
Benchmark_UseXml-4 100000 18776 200000 10377 45%
Benchmark_UseX2j-4 50000 55323 50000 33958 39%
Benchmark_UseJson-4 1000000 2257 1000000 1484 34%
Benchmark_UseJsonToMap-4 1000000 2531 1000000 1566 38%
BenchmarkBig_UseXml-4 100000 28918 100000 15876 45%
BenchmarkBig_UseX2j-4 20000 86338 50000 52661 39%
BenchmarkBig_UseJson-4 500000 4448 1000000 2664 40%
BenchmarkBig_UseJsonToMap-4 200000 9076 500000 5753 37%
BenchmarkBig3_UseXml-4 50000 42224 100000 24686 42%
BenchmarkBig3_UseX2j-4 10000 147407 20000 84332 43%
BenchmarkBig3_UseJson-4 500000 5921 500000 3930 34%
BenchmarkBig3_UseJsonToMap-4 200000 13037 200000 8670 33%
The x2j package gets an additional 15-20% performance boost going to Go 1.2.
------ Go 1.1 ------ ----------- Go 1.2 -----------
iterations ns/op iterations ns/op % improved
Benchmark_UseXml-4 200000 10377 200000 11031 -6%
Benchmark_UseX2j-4 50000 33958 100000 29188 14%
Benchmark_UseJson-4 1000000 1484 1000000 1347 9%
Benchmark_UseJsonToMap-4 1000000 1566 1000000 1434 8%
BenchmarkBig_UseXml-4 100000 15876 100000 16585 -4%
BenchmarkBig_UseX2j-4 50000 52661 50000 43452 17%
BenchmarkBig_UseJson-4 1000000 2664 1000000 2523 5%
BenchmarkBig_UseJsonToMap-4 500000 5753 500000 4992 13%
BenchmarkBig3_UseXml-4 100000 24686 100000 24348 1%
BenchmarkBig3_UseX2j-4 20000 84332 50000 66736 21%
BenchmarkBig3_UseJson-4 500000 3930 500000 3733 5%
BenchmarkBig3_UseJsonToMap-4 200000 8670 200000 7810 10%

54
vendor/github.com/beego/x2j/atomFeedString.xml generated vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en-us" updated="2009-10-04T01:35:58+00:00"><title>Code Review - My issues</title><link href="http://codereview.appspot.com/" rel="alternate"></link><link href="http://codereview.appspot.com/rss/mine/rsc" rel="self"></link><id>http://codereview.appspot.com/</id><author><name>rietveld&lt;&gt;</name></author><entry><title>rietveld: an attempt at pubsubhubbub
</title><link href="http://codereview.appspot.com/126085" rel="alternate"></link><updated>2009-10-04T01:35:58+00:00</updated><author><name>email-address-removed</name></author><id>urn:md5:134d9179c41f806be79b3a5f7877d19a</id><summary type="html">
An attempt at adding pubsubhubbub support to Rietveld.
http://code.google.com/p/pubsubhubbub
http://code.google.com/p/rietveld/issues/detail?id=155
The server side of the protocol is trivial:
1. add a &amp;lt;link rel=&amp;quot;hub&amp;quot; href=&amp;quot;hub-server&amp;quot;&amp;gt; tag to all
feeds that will be pubsubhubbubbed.
2. every time one of those feeds changes, tell the hub
with a simple POST request.
I have tested this by adding debug prints to a local hub
server and checking that the server got the right publish
requests.
I can&amp;#39;t quite get the server to work, but I think the bug
is not in my code. I think that the server expects to be
able to grab the feed and see the feed&amp;#39;s actual URL in
the link rel=&amp;quot;self&amp;quot;, but the default value for that drops
the :port from the URL, and I cannot for the life of me
figure out how to get the Atom generator deep inside
django not to do that, or even where it is doing that,
or even what code is running to generate the Atom feed.
(I thought I knew but I added some assert False statements
and it kept running!)
Ignoring that particular problem, I would appreciate
feedback on the right way to get the two values at
the top of feeds.py marked NOTE(rsc).
</summary></entry><entry><title>rietveld: correct tab handling
</title><link href="http://codereview.appspot.com/124106" rel="alternate"></link><updated>2009-10-03T23:02:17+00:00</updated><author><name>email-address-removed</name></author><id>urn:md5:0a2a4f19bb815101f0ba2904aed7c35a</id><summary type="html">
This fixes the buggy tab rendering that can be seen at
http://codereview.appspot.com/116075/diff/1/2
The fundamental problem was that the tab code was
not being told what column the text began in, so it
didn&amp;#39;t know where to put the tab stops. Another problem
was that some of the code assumed that string byte
offsets were the same as column offsets, which is only
true if there are no tabs.
In the process of fixing this, I cleaned up the arguments
to Fold and ExpandTabs and renamed them Break and
_ExpandTabs so that I could be sure that I found all the
call sites. I also wanted to verify that ExpandTabs was
not being used from outside intra_region_diff.py.
</summary></entry></feed> `

20
vendor/github.com/beego/x2j/pathTestString.xml generated vendored Normal file
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<Result>
<Before>1</Before>
<Items>
<Item1>
<Value>A</Value>
</Item1>
<Item2>
<Value>B</Value>
</Item2>
<Item1>
<Value>C</Value>
<Value>D</Value>
</Item1>
<_>
<Value>E</Value>
</_>
</Items>
<After>2</After>
</Result>

105
vendor/github.com/beego/x2j/reader2j.go generated vendored Normal file
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// io.Reader --> map[string]interface{} or JSON string
// nothing magic - just implements generic Go case
package x2j
import (
"encoding/json"
"encoding/xml"
"io"
)
// ToTree() - parse a XML io.Reader to a tree of Nodes
func ToTree(rdr io.Reader) (*Node, error) {
p := xml.NewDecoder(rdr)
p.CharsetReader = X2jCharsetReader
n, perr := xmlToTree("", nil, p)
if perr != nil {
return nil, perr
}
return n, nil
}
// ToMap() - parse a XML io.Reader to a map[string]interface{}
func ToMap(rdr io.Reader, recast ...bool) (map[string]interface{}, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
n, err := ToTree(rdr)
if err != nil {
return nil, err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(r)
return m, nil
}
// ToJson() - parse a XML io.Reader to a JSON string
func ToJson(rdr io.Reader, recast ...bool) (string, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
m, merr := ToMap(rdr, r)
if m == nil || merr != nil {
return "", merr
}
b, berr := json.Marshal(m)
if berr != nil {
return "", berr
}
return string(b), nil
}
// ToJsonIndent - the pretty form of ReaderToJson
func ToJsonIndent(rdr io.Reader, recast ...bool) (string, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
m, merr := ToMap(rdr, r)
if m == nil || merr != nil {
return "", merr
}
b, berr := json.MarshalIndent(m, "", " ")
if berr != nil {
return "", berr
}
// NOTE: don't have to worry about safe JSON marshaling with json.Marshal, since '<' and '>" are reservedin XML.
return string(b), nil
}
// ReaderValuesFromTagPath - io.Reader version of ValuesFromTagPath()
func ReaderValuesFromTagPath(rdr io.Reader, path string, getAttrs ...bool) ([]interface{}, error) {
var a bool
if len(getAttrs) == 1 {
a = getAttrs[0]
}
m, err := ToMap(rdr)
if err != nil {
return nil, err
}
return ValuesFromKeyPath(m, path, a), nil
}
// ReaderValuesForTag - io.Reader version of ValuesForTag()
func ReaderValuesForTag(rdr io.Reader, tag string) ([]interface{}, error) {
m, err := ToMap(rdr)
if err != nil {
return nil, err
}
return ValuesForKey(m, tag), nil
}

29
vendor/github.com/beego/x2j/songTextString.xml generated vendored Normal file
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@ -0,0 +1,29 @@
<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<verses>
<verse name="verse 1" no="1">
<line no="1">Henry was a renegade</line>
<line no="2">Didn't like to play it safe</line>
<line no="3">One component at a time</line>
<line no="4">There's got to be a better way</line>
<line no="5">Oh, people came from miles around</line>
<line no="6">Searching for a steady job</line>
<line no="7">Welcome to the Motor Town</line>
<line no="8">Booming like an atom bomb</line>
</verse>
<verse name="verse 2" no="2">
<line no="1">Oh, Henry was the end of the story</line>
<line no="2">Then everything went wrong</line>
<line no="3">And we'll return it to its former glory</line>
<line no="4">But it just takes so long</line>
</verse>
</verses>
<chorus>
<line no="1">It's going to take a long time</line>
<line no="2">It's going to take it, but we'll make it one day</line>
<line no="3">It's going to take a long time</line>
<line no="4">It's going to take it, but we'll make it one day</line>
</chorus>
</song>
</msg>

656
vendor/github.com/beego/x2j/x2j.go generated vendored Normal file
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// Unmarshal dynamic / arbitrary XML docs and extract values (using wildcards, if necessary).
// Copyright 2012-2013 Charles Banning. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
/*
Unmarshal dynamic / arbitrary XML docs and extract values (using wildcards, if necessary).
One useful function is:
- Unmarshal(doc []byte, v interface{}) error
where v is a pointer to a variable of type 'map[string]interface{}', 'string', or
any other type supported by xml.Unmarshal().
To retrieve a value for specific tag use:
- DocValue(doc, path string, attrs ...string) (interface{},error)
- MapValue(m map[string]interface{}, path string, attr map[string]interface{}, recast ...bool) (interface{}, error)
The 'path' argument is a period-separated tag hierarchy - also known as dot-notation.
It is the program's responsibility to cast the returned value to the proper type; possible
types are the normal JSON unmarshaling types: string, float64, bool, []interface, map[string]interface{}.
To retrieve all values associated with a tag occurring anywhere in the XML document use:
- ValuesForTag(doc, tag string) ([]interface{}, error)
- ValuesForKey(m map[string]interface{}, key string) []interface{}
Demos: http://play.golang.org/p/m8zP-cpk0O
http://play.golang.org/p/cIteTS1iSg
http://play.golang.org/p/vd8pMiI21b
Returned values should be one of map[string]interface, []interface{}, or string.
All the values assocated with a tag-path that may include one or more wildcard characters -
'*' - can also be retrieved using:
- ValuesFromTagPath(doc, path string, getAttrs ...bool) ([]interface{}, error)
- ValuesFromKeyPath(map[string]interface{}, path string, getAttrs ...bool) []interface{}
Demos: http://play.golang.org/p/kUQnZ8VuhS
http://play.golang.org/p/l1aMHYtz7G
NOTE: care should be taken when using "*" at the end of a path - i.e., "books.book.*". See
the x2jpath_test.go case on how the wildcard returns all key values and collapses list values;
the same message structure can load a []interface{} or a map[string]interface{} (or an interface{})
value for a tag.
See the test cases in "x2jpath_test.go" and programs in "example" subdirectory for more.
XML PARSING CONVENTIONS
- Attributes are parsed to map[string]interface{} values by prefixing a hyphen, '-',
to the attribute label.
- If the element is a simple element and has attributes, the element value
is given the key '#text' for its map[string]interface{} representation. (See
the 'atomFeedString.xml' test data, below.)
io.Reader HANDLING
ToTree(), ToMap(), ToJson(), and ToJsonIndent() provide parsing of messages from an io.Reader.
If you want to handle a message stream, look at XmlMsgsFromReader().
NON-UTF8 CHARACTER SETS
Use the X2jCharsetReader variable to assign io.Reader for alternative character sets.
*/
package x2j
import (
"bytes"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"io"
"regexp"
"strconv"
"strings"
)
// If X2jCharsetReader != nil, it will be used to decode the doc or stream if required
// import charset "code.google.com/p/go-charset/charset"
// ...
// x2j.X2jCharsetReader = charset.NewReader
// s, err := x2j.DocToJson(doc)
var X2jCharsetReader func(charset string, input io.Reader)(io.Reader, error)
type Node struct {
dup bool // is member of a list
attr bool // is an attribute
key string // XML tag
val string // element value
nodes []*Node
}
// DocToJson - return an XML doc as a JSON string.
// If the optional argument 'recast' is 'true', then values will be converted to boolean or float64 if possible.
func DocToJson(doc string, recast ...bool) (string, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
m, merr := DocToMap(doc, r)
if m == nil || merr != nil {
return "", merr
}
b, berr := json.Marshal(m)
if berr != nil {
return "", berr
}
// NOTE: don't have to worry about safe JSON marshaling with json.Marshal, since '<' and '>" are reservedin XML.
return string(b), nil
}
// DocToJsonIndent - return an XML doc as a prettified JSON string.
// If the optional argument 'recast' is 'true', then values will be converted to boolean or float64 if possible.
// Note: recasting is only applied to element values, not attribute values.
func DocToJsonIndent(doc string, recast ...bool) (string, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
m, merr := DocToMap(doc, r)
if m == nil || merr != nil {
return "", merr
}
b, berr := json.MarshalIndent(m, "", " ")
if berr != nil {
return "", berr
}
// NOTE: don't have to worry about safe JSON marshaling with json.Marshal, since '<' and '>" are reservedin XML.
return string(b), nil
}
// DocToMap - convert an XML doc into a map[string]interface{}.
// (This is analogous to unmarshalling a JSON string to map[string]interface{} using json.Unmarshal().)
// If the optional argument 'recast' is 'true', then values will be converted to boolean or float64 if possible.
// Note: recasting is only applied to element values, not attribute values.
func DocToMap(doc string, recast ...bool) (map[string]interface{}, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
n, err := DocToTree(doc)
if err != nil {
return nil, err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(r)
return m, nil
}
// DocToTree - convert an XML doc into a tree of nodes.
func DocToTree(doc string) (*Node, error) {
// xml.Decoder doesn't properly handle whitespace in some doc
// see songTextString.xml test case ...
reg, _ := regexp.Compile("[ \t\n\r]*<")
doc = reg.ReplaceAllString(doc, "<")
b := bytes.NewBufferString(doc)
p := xml.NewDecoder(b)
p.CharsetReader = X2jCharsetReader
n, berr := xmlToTree("", nil, p)
if berr != nil {
return nil, berr
}
return n, nil
}
// (*Node)WriteTree - convert a tree of nodes into a printable string.
// 'padding' is the starting indentation; typically: n.WriteTree().
func (n *Node) WriteTree(padding ...int) string {
var indent int
if len(padding) == 1 {
indent = padding[0]
}
var s string
if n.val != "" {
for i := 0; i < indent; i++ {
s += " "
}
s += n.key + " : " + n.val + "\n"
} else {
for i := 0; i < indent; i++ {
s += " "
}
s += n.key + " :" + "\n"
for _, nn := range n.nodes {
s += nn.WriteTree(indent + 1)
}
}
return s
}
// xmlToTree - load a 'clean' XML doc into a tree of *Node.
func xmlToTree(skey string, a []xml.Attr, p *xml.Decoder) (*Node, error) {
n := new(Node)
n.nodes = make([]*Node, 0)
if skey != "" {
n.key = skey
if len(a) > 0 {
for _, v := range a {
na := new(Node)
na.attr = true
na.key = `-` + v.Name.Local
na.val = v.Value
n.nodes = append(n.nodes, na)
}
}
}
for {
t, err := p.Token()
if err != nil {
return nil, err
}
switch t.(type) {
case xml.StartElement:
tt := t.(xml.StartElement)
// handle root
if n.key == "" {
n.key = tt.Name.Local
if len(tt.Attr) > 0 {
for _, v := range tt.Attr {
na := new(Node)
na.attr = true
na.key = `-` + v.Name.Local
na.val = v.Value
n.nodes = append(n.nodes, na)
}
}
} else {
nn, nnerr := xmlToTree(tt.Name.Local, tt.Attr, p)
if nnerr != nil {
return nil, nnerr
}
n.nodes = append(n.nodes, nn)
}
case xml.EndElement:
// scan n.nodes for duplicate n.key values
n.markDuplicateKeys()
return n, nil
case xml.CharData:
tt := string(t.(xml.CharData))
if len(n.nodes) > 0 {
nn := new(Node)
nn.key = "#text"
nn.val = tt
n.nodes = append(n.nodes, nn)
} else {
n.val = tt
}
default:
// noop
}
}
// Logically we can't get here, but provide an error message anyway.
return nil, errors.New("Unknown parse error in xmlToTree() for: " + n.key)
}
// (*Node)markDuplicateKeys - set node.dup flag for loading map[string]interface{}.
func (n *Node) markDuplicateKeys() {
l := len(n.nodes)
for i := 0; i < l; i++ {
if n.nodes[i].dup {
continue
}
for j := i + 1; j < l; j++ {
if n.nodes[i].key == n.nodes[j].key {
n.nodes[i].dup = true
n.nodes[j].dup = true
}
}
}
}
// (*Node)treeToMap - convert a tree of nodes into a map[string]interface{}.
// (Parses to map that is structurally the same as from json.Unmarshal().)
// Note: root is not instantiated; call with: "m[n.key] = n.treeToMap(recast)".
func (n *Node) treeToMap(r bool) interface{} {
if len(n.nodes) == 0 {
return recast(n.val, r)
}
m := make(map[string]interface{}, 0)
for _, v := range n.nodes {
// just a value
if !v.dup && len(v.nodes) == 0 {
m[v.key] = recast(v.val, r)
continue
}
// a list of values
if v.dup {
var a []interface{}
if vv, ok := m[v.key]; ok {
a = vv.([]interface{})
} else {
a = make([]interface{}, 0)
}
a = append(a, v.treeToMap(r))
m[v.key] = interface{}(a)
continue
}
// it's a unique key
m[v.key] = v.treeToMap(r)
}
return interface{}(m)
}
// recast - try to cast string values to bool or float64
func recast(s string, r bool) interface{} {
if r {
// handle numeric strings ahead of boolean
if f, err := strconv.ParseFloat(s, 64); err == nil {
return interface{}(f)
}
// ParseBool treats "1"==true & "0"==false
if b, err := strconv.ParseBool(s); err == nil {
return interface{}(b)
}
}
return interface{}(s)
}
// WriteMap - dumps the map[string]interface{} for examination.
// 'offset' is initial indentation count; typically: WriteMap(m).
// NOTE: with XML all element types are 'string'.
// But code written as generic for use with maps[string]interface{} values from json.Unmarshal().
// Or it can handle a DocToMap(doc,true) result where values have been recast'd.
func WriteMap(m interface{}, offset ...int) string {
var indent int
if len(offset) == 1 {
indent = offset[0]
}
var s string
switch m.(type) {
case nil:
return "[nil] nil"
case string:
return "[string] " + m.(string)
case float64:
return "[float64] " + strconv.FormatFloat(m.(float64), 'e', 2, 64)
case bool:
return "[bool] " + strconv.FormatBool(m.(bool))
case []interface{}:
s += "[[]interface{}]"
for i, v := range m.([]interface{}) {
s += "\n"
for i := 0; i < indent; i++ {
s += " "
}
s += "[item: " + strconv.FormatInt(int64(i), 10) + "]"
switch v.(type) {
case string, float64, bool:
s += "\n"
default:
// noop
}
for i := 0; i < indent; i++ {
s += " "
}
s += WriteMap(v, indent+1)
}
case map[string]interface{}:
for k, v := range m.(map[string]interface{}) {
s += "\n"
for i := 0; i < indent; i++ {
s += " "
}
// s += "[map[string]interface{}] "+k+" :"+WriteMap(v,indent+1)
s += k + " :" + WriteMap(v, indent+1)
}
default:
// shouldn't ever be here ...
s += fmt.Sprintf("unknown type for: %v", m)
}
return s
}
// ------------------------ value extraction from XML doc --------------------------
// DocValue - return a value for a specific tag
// 'doc' is a valid XML message.
// 'path' is a hierarchy of XML tags, e.g., "doc.name".
// 'attrs' is an OPTIONAL list of "name:value" pairs for attributes.
// Note: 'recast' is not enabled here. Use DocToMap(), NewAttributeMap(), and MapValue() calls for that.
func DocValue(doc, path string, attrs ...string) (interface{}, error) {
n, err := DocToTree(doc)
if err != nil {
return nil, err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(false)
a, aerr := NewAttributeMap(attrs...)
if aerr != nil {
return nil, aerr
}
v, verr := MapValue(m, path, a)
if verr != nil {
return nil, verr
}
return v, nil
}
// MapValue - retrieves value based on walking the map, 'm'.
// 'm' is the map value of interest.
// 'path' is a period-separated hierarchy of keys in the map.
// 'attr' is a map of attribute "name:value" pairs from NewAttributeMap(). May be 'nil'.
// If the path can't be traversed, an error is returned.
// Note: the optional argument 'r' can be used to coerce attribute values, 'attr', if done so for 'm'.
func MapValue(m map[string]interface{}, path string, attr map[string]interface{}, r ...bool) (interface{}, error) {
// attribute values may have been recasted during map construction; default is 'false'.
if len(r) == 1 && r[0] == true {
for k, v := range attr {
attr[k] = recast(v.(string), true)
}
}
// parse the path
keys := strings.Split(path, ".")
// initialize return value to 'm' so a path of "" will work correctly
var v interface{} = m
var ok bool
var okey string
var isMap bool = true
if keys[0] == "" && len(attr) == 0 {
return v, nil
}
for _, key := range keys {
if !isMap {
return nil, errors.New("no keys beyond: " + okey)
}
if v, ok = m[key]; !ok {
return nil, errors.New("no key in map: " + key)
} else {
switch v.(type) {
case map[string]interface{}:
m = v.(map[string]interface{})
isMap = true
default:
isMap = false
}
}
// save 'key' for error reporting
okey = key
}
// match attributes; value is "#text" or nil
if attr == nil {
return v, nil
}
return hasAttributes(v, attr)
}
// hasAttributes() - interface{} equality works for string, float64, bool
func hasAttributes(v interface{}, a map[string]interface{}) (interface{}, error) {
switch v.(type) {
case []interface{}:
// run through all entries looking one with matching attributes
for _, vv := range v.([]interface{}) {
if vvv, vvverr := hasAttributes(vv, a); vvverr == nil {
return vvv, nil
}
}
return nil, errors.New("no list member with matching attributes")
case map[string]interface{}:
// do all attribute name:value pairs match?
nv := v.(map[string]interface{})
for key, val := range a {
if vv, ok := nv[key]; !ok {
return nil, errors.New("no attribute with name: " + key[1:])
} else if val != vv {
return nil, errors.New("no attribute key:value pair: " + fmt.Sprintf("%s:%v", key[1:], val))
}
}
// they all match; so return value associated with "#text" key.
if vv, ok := nv["#text"]; ok {
return vv, nil
} else {
// this happens when another element is value of tag rather than just a string value
return nv, nil
}
}
return nil, errors.New("no match for attributes")
}
// NewAttributeMap() - generate map of attributes=value entries as map["-"+string]string.
// 'kv' arguments are "name:value" pairs that appear as attributes, name="value".
// If len(kv) == 0, the return is (nil, nil).
func NewAttributeMap(kv ...string) (map[string]interface{}, error) {
if len(kv) == 0 {
return nil, nil
}
m := make(map[string]interface{}, 0)
for _, v := range kv {
vv := strings.Split(v, ":")
if len(vv) != 2 {
return nil, errors.New("attribute not \"name:value\" pair: " + v)
}
// attributes are stored as keys prepended with hyphen
m["-"+vv[0]] = interface{}(vv[1])
}
return m, nil
}
//------------------------- get values for key ----------------------------
// ValuesForTag - return all values in doc associated with 'tag'.
// Returns nil if the 'tag' does not occur in the doc.
// If there is an error encounted while parsing doc, that is returned.
// If you want values 'recast' use DocToMap() and ValuesForKey().
func ValuesForTag(doc, tag string) ([]interface{}, error) {
m, err := DocToMap(doc)
if err != nil {
return nil, err
}
return ValuesForKey(m, tag), nil
}
// ValuesForKey - return all values in map associated with 'key'
// Returns nil if the 'key' does not occur in the map
func ValuesForKey(m map[string]interface{}, key string) []interface{} {
ret := make([]interface{}, 0)
hasKey(m, key, &ret)
if len(ret) > 0 {
return ret
}
return nil
}
// hasKey - if the map 'key' exists append it to array
// if it doesn't do nothing except scan array and map values
func hasKey(iv interface{}, key string, ret *[]interface{}) {
switch iv.(type) {
case map[string]interface{}:
vv := iv.(map[string]interface{})
if v, ok := vv[key]; ok {
*ret = append(*ret, v)
}
for _, v := range iv.(map[string]interface{}) {
hasKey(v, key, ret)
}
case []interface{}:
for _, v := range iv.([]interface{}) {
hasKey(v, key, ret)
}
}
}
// ======== 2013.07.01 - x2j.Unmarshal, wraps xml.Unmarshal ==============
// Unmarshal - wraps xml.Unmarshal with handling of map[string]interface{}
// and string type variables.
// Usage: x2j.Unmarshal(doc,&m) where m of type map[string]interface{}
// x2j.Unmarshal(doc,&s) where s of type string (Overrides xml.Unmarshal().)
// x2j.Unmarshal(doc,&struct) - passed to xml.Unmarshal()
// x2j.Unmarshal(doc,&slice) - passed to xml.Unmarshal()
func Unmarshal(doc []byte, v interface{}) error {
switch v.(type) {
case *map[string]interface{}:
m, err := ByteDocToMap(doc)
vv := *v.(*map[string]interface{})
for k, v := range m {
vv[k] = v
}
return err
case *string:
s, err := ByteDocToJson(doc)
*(v.(*string)) = s
return err
default:
b := bytes.NewBuffer(doc)
p := xml.NewDecoder(b)
p.CharsetReader = X2jCharsetReader
return p.Decode(v)
// return xml.Unmarshal(doc, v)
}
return nil
}
// ByteDocToJson - return an XML doc as a JSON string.
// If the optional argument 'recast' is 'true', then values will be converted to boolean or float64 if possible.
func ByteDocToJson(doc []byte, recast ...bool) (string, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
m, merr := ByteDocToMap(doc, r)
if m == nil || merr != nil {
return "", merr
}
b, berr := json.Marshal(m)
if berr != nil {
return "", berr
}
// NOTE: don't have to worry about safe JSON marshaling with json.Marshal, since '<' and '>" are reservedin XML.
return string(b), nil
}
// ByteDocToMap - convert an XML doc into a map[string]interface{}.
// (This is analogous to unmarshalling a JSON string to map[string]interface{} using json.Unmarshal().)
// If the optional argument 'recast' is 'true', then values will be converted to boolean or float64 if possible.
// Note: recasting is only applied to element values, not attribute values.
func ByteDocToMap(doc []byte, recast ...bool) (map[string]interface{}, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
n, err := ByteDocToTree(doc)
if err != nil {
return nil, err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(r)
return m, nil
}
// ByteDocToTree - convert an XML doc into a tree of nodes.
func ByteDocToTree(doc []byte) (*Node, error) {
// xml.Decoder doesn't properly handle whitespace in some doc
// see songTextString.xml test case ...
reg, _ := regexp.Compile("[ \t\n\r]*<")
doc = reg.ReplaceAll(doc, []byte("<"))
b := bytes.NewBuffer(doc)
p := xml.NewDecoder(b)
p.CharsetReader = X2jCharsetReader
n, berr := xmlToTree("", nil, p)
if berr != nil {
return nil, berr
}
return n, nil
}

127
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// Copyright 2012-2013 Charles Banning. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
// x2j_bulk.go: Process files with multiple XML messages.
// Extends x2m_bulk.go to work with JSON strings rather than map[string]interface{}.
package x2j
import (
"bytes"
"encoding/json"
"io"
"os"
"regexp"
)
// XmlMsgsFromFileAsJson()
// 'fname' is name of file
// 'phandler' is the JSON string processing handler. Return of 'false' stops further processing.
// 'ehandler' is the parsing error handler. Return of 'false' stops further processing and returns error.
// Note: phandler() and ehandler() calls are blocking, so reading and processing of messages is serialized.
// This means that you can stop reading the file on error or after processing a particular message.
// To have reading and handling run concurrently, pass arguments to a go routine in handler and return true.
func XmlMsgsFromFileAsJson(fname string, phandler func(string)(bool), ehandler func(error)(bool), recast ...bool) error {
var r bool
if len(recast) == 1 {
r = recast[0]
}
fi, fierr := os.Stat(fname)
if fierr != nil {
return fierr
}
fh, fherr := os.Open(fname)
if fherr != nil {
return fherr
}
defer fh.Close()
buf := make([]byte,fi.Size())
_, rerr := fh.Read(buf)
if rerr != nil {
return rerr
}
doc := string(buf)
// xml.Decoder doesn't properly handle whitespace in some doc
// see songTextString.xml test case ...
reg,_ := regexp.Compile("[ \t\n\r]*<")
doc = reg.ReplaceAllString(doc,"<")
b := bytes.NewBufferString(doc)
for {
s, serr := XmlBufferToJson(b,r)
if serr != nil && serr != io.EOF {
if ok := ehandler(serr); !ok {
// caused reader termination
return serr
}
}
if s != "" {
if ok := phandler(s); !ok {
break
}
}
if serr == io.EOF {
break
}
}
return nil
}
// XmlBufferToJson - process XML message from a bytes.Buffer
// 'b' is the buffer
// Optional argument 'recast' coerces values to float64 or bool where possible.
func XmlBufferToJson(b *bytes.Buffer,recast ...bool) (string,error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
n,err := XmlBufferToTree(b)
if err != nil {
return "", err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(r)
j, jerr := json.Marshal(m)
return string(j), jerr
}
// ============================= io.Reader version for stream processing ======================
// XmlMsgsFromReaderAsJson() - io.Reader version of XmlMsgsFromFileAsJson
// 'rdr' is an io.Reader for an XML message (stream)
// 'phandler' is the JSON string processing handler. Return of 'false' stops further processing.
// 'ehandler' is the parsing error handler. Return of 'false' stops further processing and returns error.
// Note: phandler() and ehandler() calls are blocking, so reading and processing of messages is serialized.
// This means that you can stop reading the file on error or after processing a particular message.
// To have reading and handling run concurrently, pass arguments to a go routine in handler and return true.
func XmlMsgsFromReaderAsJson(rdr io.Reader, phandler func(string)(bool), ehandler func(error)(bool), recast ...bool) error {
var r bool
if len(recast) == 1 {
r = recast[0]
}
for {
s, serr := ToJson(rdr,r)
if serr != nil && serr != io.EOF {
if ok := ehandler(serr); !ok {
// caused reader termination
return serr
}
}
if s != "" {
if ok := phandler(s); !ok {
break
}
}
if serr == io.EOF {
break
}
}
return nil
}

29
vendor/github.com/beego/x2j/x2j_test.xml generated vendored Normal file
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@ -0,0 +1,29 @@
<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<verses>
<verse name="verse 1" no="1">
<line no="1">Henry was a renegade</line>
<line no="2">Didn't like to play it safe</line>
<line no="3">One component at a time</line>
<line no="4">There's got to be a better way</line>
<line no="5">Oh, people came from miles around</line>
<line no="6">Searching for a steady job</line>
<line no="7">Welcome to the Motor Town</line>
<line no="8">Booming like an atom bomb</line>
</verse>
<verse name="verse 2" no="2">
<line no="1">Oh, Henry was the end of the story</line>
<line no="2">Then everything went wrong</line>
<line no="3">And we'll return it to its former glory</line>
<line no="4">But it just takes so long</line>
</verse>
</verses>
<chorus>
<line no="1">It's going to take a long time</line>
<line no="2">It's going to take it, but we'll make it one day</line>
<line no="3">It's going to take a long time</line>
<line no="4">It's going to take it, but we'll make it one day</line>
</chorus>
</song>
</msg>

125
vendor/github.com/beego/x2j/x2j_valuesFrom.go generated vendored Normal file
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// Copyright 2012-2013 Charles Banning. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
// x2j_valuesFrom.go: Extract values from an arbitrary XML doc. Tag path can include wildcard characters.
package x2j
import (
"strings"
)
// ------------------- sweep up everything for some point in the node tree ---------------------
// ValuesFromTagPath - deliver all values for a path node from a XML doc
// If there are no values for the path 'nil' is returned.
// A return value of (nil, nil) means that there were no values and no errors parsing the doc.
// 'doc' is the XML document
// 'path' is a dot-separated path of tag nodes
// 'getAttrs' can be set 'true' to return attribute values for "*"-terminated path
// If a node is '*', then everything beyond is scanned for values.
// E.g., "doc.books' might return a single value 'book' of type []interface{}, but
// "doc.books.*" could return all the 'book' entries as []map[string]interface{}.
// "doc.books.*.author" might return all the 'author' tag values as []string - or
// "doc.books.*.author.lastname" might be required, depending on he schema.
func ValuesFromTagPath(doc, path string, getAttrs ...bool) ([]interface{}, error) {
var a bool
if len(getAttrs) == 1 {
a = getAttrs[0]
}
m, err := DocToMap(doc)
if err != nil {
return nil, err
}
v := ValuesFromKeyPath(m, path, a)
return v, nil
}
// ValuesFromKeyPath - deliver all values for a path node from a map[string]interface{}
// If there are no values for the path 'nil' is returned.
// 'm' is the map to be walked
// 'path' is a dot-separated path of key values
// 'getAttrs' can be set 'true' to return attribute values for "*"-terminated path
// If a node is '*', then everything beyond is walked.
// E.g., see ValuesFromTagPath documentation.
func ValuesFromKeyPath(m map[string]interface{}, path string, getAttrs ...bool) []interface{} {
var a bool
if len(getAttrs) == 1 {
a = getAttrs[0]
}
keys := strings.Split(path, ".")
ret := make([]interface{}, 0)
valuesFromKeyPath(&ret, m, keys, a)
if len(ret) == 0 {
return nil
}
return ret
}
func valuesFromKeyPath(ret *[]interface{}, m interface{}, keys []string, getAttrs bool) {
lenKeys := len(keys)
// load 'm' values into 'ret'
// expand any lists
if lenKeys == 0 {
switch m.(type) {
case map[string]interface{}:
*ret = append(*ret, m)
case []interface{}:
for _, v := range m.([]interface{}) {
*ret = append(*ret, v)
}
default:
*ret = append(*ret, m)
}
return
}
// key of interest
key := keys[0]
switch key {
case "*": // wildcard - scan all values
switch m.(type) {
case map[string]interface{}:
for k, v := range m.(map[string]interface{}) {
if string(k[:1]) == "-" && !getAttrs { // skip attributes?
continue
}
valuesFromKeyPath(ret, v, keys[1:], getAttrs)
}
case []interface{}:
for _, v := range m.([]interface{}) {
switch v.(type) {
// flatten out a list of maps - keys are processed
case map[string]interface{}:
for kk, vv := range v.(map[string]interface{}) {
if string(kk[:1]) == "-" && !getAttrs { // skip attributes?
continue
}
valuesFromKeyPath(ret, vv, keys[1:], getAttrs)
}
default:
valuesFromKeyPath(ret, v, keys[1:], getAttrs)
}
}
}
default: // key - must be map[string]interface{}
switch m.(type) {
case map[string]interface{}:
if v, ok := m.(map[string]interface{})[key]; ok {
valuesFromKeyPath(ret, v, keys[1:], getAttrs)
}
case []interface{}: // may be buried in list
for _, v := range m.([]interface{}) {
switch v.(type) {
case map[string]interface{}:
if vv, ok := v.(map[string]interface{})[key]; ok {
valuesFromKeyPath(ret, vv, keys[1:], getAttrs)
}
}
}
}
}
}

201
vendor/github.com/beego/x2j/x2m_bulk.go generated vendored Normal file
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// Copyright 2012-2013 Charles Banning. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
// x2m_bulk.go: Process files with multiple XML messages.
package x2j
import (
"bytes"
"encoding/xml"
"errors"
"io"
"os"
"regexp"
"sync"
)
// XmlMsgsFromFile()
// 'fname' is name of file
// 'phandler' is the map processing handler. Return of 'false' stops further processing.
// 'ehandler' is the parsing error handler. Return of 'false' stops further processing and returns error.
// Note: phandler() and ehandler() calls are blocking, so reading and processing of messages is serialized.
// This means that you can stop reading the file on error or after processing a particular message.
// To have reading and handling run concurrently, pass arguments to a go routine in handler and return true.
func XmlMsgsFromFile(fname string, phandler func(map[string]interface{})(bool), ehandler func(error)(bool), recast ...bool) error {
var r bool
if len(recast) == 1 {
r = recast[0]
}
fi, fierr := os.Stat(fname)
if fierr != nil {
return fierr
}
fh, fherr := os.Open(fname)
if fherr != nil {
return fherr
}
defer fh.Close()
buf := make([]byte,fi.Size())
_, rerr := fh.Read(buf)
if rerr != nil {
return rerr
}
doc := string(buf)
// xml.Decoder doesn't properly handle whitespace in some doc
// see songTextString.xml test case ...
reg,_ := regexp.Compile("[ \t\n\r]*<")
doc = reg.ReplaceAllString(doc,"<")
b := bytes.NewBufferString(doc)
for {
m, merr := XmlBufferToMap(b,r)
if merr != nil && merr != io.EOF {
if ok := ehandler(merr); !ok {
// caused reader termination
return merr
}
}
if m != nil {
if ok := phandler(m); !ok {
break
}
}
if merr == io.EOF {
break
}
}
return nil
}
// XmlBufferToMap - process XML message from a bytes.Buffer
// 'b' is the buffer
// Optional argument 'recast' coerces map values to float64 or bool where possible.
func XmlBufferToMap(b *bytes.Buffer,recast ...bool) (map[string]interface{},error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
n,err := XmlBufferToTree(b)
if err != nil {
return nil, err
}
m := make(map[string]interface{})
m[n.key] = n.treeToMap(r)
return m,nil
}
// BufferToTree - derived from DocToTree()
func XmlBufferToTree(b *bytes.Buffer) (*Node, error) {
p := xml.NewDecoder(b)
p.CharsetReader = X2jCharsetReader
n, berr := xmlToTree("",nil,p)
if berr != nil {
return nil, berr
}
return n,nil
}
// XmlBuffer - create XML decoder buffer for a string from anywhere, not necessarily a file.
type XmlBuffer struct {
cnt uint64
str *string
buf *bytes.Buffer
}
var mtx sync.Mutex
var cnt uint64
var activeXmlBufs = make(map[uint64]*XmlBuffer)
// NewXmlBuffer() - creates a bytes.Buffer from a string with multiple messages
// Use Close() function to release the buffer for garbage collection.
func NewXmlBuffer(s string) *XmlBuffer {
// xml.Decoder doesn't properly handle whitespace in some doc
// see songTextString.xml test case ...
reg,_ := regexp.Compile("[ \t\n\r]*<")
s = reg.ReplaceAllString(s,"<")
b := bytes.NewBufferString(s)
buf := new(XmlBuffer)
buf.str = &s
buf.buf = b
mtx.Lock()
defer mtx.Unlock()
buf.cnt = cnt ; cnt++
activeXmlBufs[buf.cnt] = buf
return buf
}
// BytesNewXmlBuffer() - creates a bytes.Buffer from b with possibly multiple messages
// Use Close() function to release the buffer for garbage collection.
func BytesNewXmlBuffer(b []byte) *XmlBuffer {
bb := bytes.NewBuffer(b)
buf := new(XmlBuffer)
buf.buf = bb
mtx.Lock()
defer mtx.Unlock()
buf.cnt = cnt ; cnt++
activeXmlBufs[buf.cnt] = buf
return buf
}
// Close() - release the buffer address for garbage collection
func (buf *XmlBuffer)Close() {
mtx.Lock()
defer mtx.Unlock()
delete(activeXmlBufs,buf.cnt)
}
// NextMap() - retrieve next XML message in buffer as a map[string]interface{} value.
// The optional argument 'recast' will try and coerce values to float64 or bool as appropriate.
func (buf *XmlBuffer)NextMap(recast ...bool) (map[string]interface{}, error) {
var r bool
if len(recast) == 1 {
r = recast[0]
}
if _, ok := activeXmlBufs[buf.cnt]; !ok {
return nil, errors.New("Buffer is not active.")
}
return XmlBufferToMap(buf.buf,r)
}
// ============================= io.Reader version for stream processing ======================
// XmlMsgsFromReader() - io.Reader version of XmlMsgsFromFile
// 'rdr' is an io.Reader for an XML message (stream)
// 'phandler' is the map processing handler. Return of 'false' stops further processing.
// 'ehandler' is the parsing error handler. Return of 'false' stops further processing and returns error.
// Note: phandler() and ehandler() calls are blocking, so reading and processing of messages is serialized.
// This means that you can stop reading the file on error or after processing a particular message.
// To have reading and handling run concurrently, pass arguments to a go routine in handler and return true.
func XmlMsgsFromReader(rdr io.Reader, phandler func(map[string]interface{})(bool), ehandler func(error)(bool), recast ...bool) error {
var r bool
if len(recast) == 1 {
r = recast[0]
}
for {
m, merr := ToMap(rdr,r)
if merr != nil && merr != io.EOF {
if ok := ehandler(merr); !ok {
// caused reader termination
return merr
}
}
if m != nil {
if ok := phandler(m); !ok {
break
}
}
if merr == io.EOF {
break
}
}
return nil
}

67
vendor/github.com/beego/x2j/x2m_bulk.xml generated vendored Normal file
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<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<verses>
<verse name="verse 1" no="1">
<line no="1">Henry was a renegade</line>
<line no="2">Didn't like to play it safe</line>
<line no="3">One component at a time</line>
<line no="4">There's got to be a better way</line>
<line no="5">Oh, people came from miles around</line>
<line no="6">Searching for a steady job</line>
<line no="7">Welcome to the Motor Town</line>
<line no="8">Booming like an atom bomb</line>
</verse>
<verse name="verse 2" no="2">
<line no="1">Oh, Henry was the end of the story</line>
<line no="2">Then everything went wrong</line>
<line no="3">And we'll return it to its former glory</line>
<line no="4">But it just takes so long</line>
</verse>
</verses>
<chorus>
<line no="1">It's going to take a long time</line>
<line no="2">It's going to take it, but we'll make it one day</line>
<line no="3">It's going to take a long time</line>
<line no="4">It's going to take it, but we'll make it one day</line>
</chorus>
</song>
</msg>
<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<verses>
<verse name="verse 1" no="1">
<line no="1">Henry was a renegade</line>
<line no="2">Didn't like to play it safe</line>
<line no="3">One component at a time</line>
<line no="4">There's got to be a better way</line>
<line no="5">Oh, people came from miles around</line>
<line no="6">Searching for a steady job</line>
<line no="7">Welcome to the Motor Town</line>
<line no="8">Booming like an atom bomb</line>
</verse>
</verses>
</song>
</msg>
<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<chorus>
<line no="1">It's going to take a long time</line>
<line no="2">It's going to take it, but we'll make it one day</line>
<line no="3">It's going to take a long time</line>
<line no="4">It's going to take it, but we'll make it one day</line>
</chorus>
</song>
</msg>
<msg mtype="alert" mpriority="1">
<text>help me!</text>
<song title="A Long Time" author="Mayer Hawthorne">
<chorus>
<line no="1">It's going to take a long time</line>
<line no="2">It's going to take it, but we'll make it one day</line>
<line no="3">It's going to take a long time</line>
<line no="4">It's going to take it, but we'll make it one day</line>
</song>
</msg>

2
vendor/github.com/belogik/goes/.gitignore generated vendored Normal file
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@ -0,0 +1,2 @@
*.test
*.swp

35
vendor/github.com/belogik/goes/.travis.yml generated vendored Normal file
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@ -0,0 +1,35 @@
language: go
go:
- 1.1
- 1.2
- 1.3
- 1.4.2
- 1.4.3
- 1.5
- 1.5.1
env:
matrix:
- ES_VERSION=1.0.3 GROOVY_VER=2.0.0
- ES_VERSION=1.1.2 GROOVY_VER=2.0.0
- ES_VERSION=1.2.1 GROOVY_VER=2.2.0
- ES_VERSION=1.3.4
- ES_VERSION=1.4.4
- ES_VERSION=1.5.2
- ES_VERSION=1.6.0
- ES_VERSION=1.7.0
before_script:
- mkdir ${HOME}/elasticsearch
- wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-${ES_VERSION}.tar.gz
- tar -xzf elasticsearch-${ES_VERSION}.tar.gz -C ${HOME}/elasticsearch
- "echo 'script.groovy.sandbox.enabled: true' >> ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/config/elasticsearch.yml"
- 'if [[ "${ES_VERSION}" < "1.3" ]]; then ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/bin/plugin --install elasticsearch/elasticsearch-lang-groovy/${GROOVY_VER}; fi'
- ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/bin/elasticsearch >/dev/null &
install:
- go get gopkg.in/check.v1
script:
- make test

27
vendor/github.com/belogik/goes/LICENSE generated vendored Normal file
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@ -0,0 +1,27 @@
Copyright (c) 2013 Belogik. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Belogik nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

10
vendor/github.com/belogik/goes/Makefile generated vendored Normal file
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@ -0,0 +1,10 @@
help:
@echo "Available targets:"
@echo "- test: run tests"
@echo "- installdependencies: installs dependencies declared in dependencies.txt"
installdependencies:
cat dependencies.txt | xargs go get
test: installdependencies
go test -i && go test

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There is a new maintener for this library.
Please go here : https://github.com/OwnLocal/goes
!!!!! By using this repo you are running on thin ice !!!!!!
https://github.com/belogik/goes/issues/40 might be of interest for you.

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- Add Gzip support to bulk data to save bandwith

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launchpad.net/gocheck

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// Copyright 2013 Belogik. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package goes provides an API to access Elasticsearch.
package goes
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"reflect"
"strconv"
"strings"
)
const (
BULK_COMMAND_INDEX = "index"
BULK_COMMAND_DELETE = "delete"
)
func (err *SearchError) Error() string {
return fmt.Sprintf("[%d] %s", err.StatusCode, err.Msg)
}
// NewConnection initiates a new Connection to an elasticsearch server
//
// This function is pretty useless for now but might be useful in a near future
// if wee need more features like connection pooling or load balancing.
func NewConnection(host string, port string) *Connection {
return &Connection{host, port, http.DefaultClient}
}
func (c *Connection) WithClient(cl *http.Client) *Connection {
c.Client = cl
return c
}
// CreateIndex creates a new index represented by a name and a mapping
func (c *Connection) CreateIndex(name string, mapping interface{}) (*Response, error) {
r := Request{
Conn: c,
Query: mapping,
IndexList: []string{name},
method: "PUT",
}
return r.Run()
}
// DeleteIndex deletes an index represented by a name
func (c *Connection) DeleteIndex(name string) (*Response, error) {
r := Request{
Conn: c,
IndexList: []string{name},
method: "DELETE",
}
return r.Run()
}
// RefreshIndex refreshes an index represented by a name
func (c *Connection) RefreshIndex(name string) (*Response, error) {
r := Request{
Conn: c,
IndexList: []string{name},
method: "POST",
api: "_refresh",
}
return r.Run()
}
// UpdateIndexSettings updates settings for existing index represented by a name and a settings
// as described here: https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-update-settings.html
func (c *Connection) UpdateIndexSettings(name string, settings interface{}) (*Response, error) {
r := Request{
Conn: c,
Query: settings,
IndexList: []string{name},
method: "PUT",
api: "_settings",
}
return r.Run()
}
// Optimize an index represented by a name, extra args are also allowed please check:
// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-optimize.html#indices-optimize
func (c *Connection) Optimize(indexList []string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
IndexList: indexList,
ExtraArgs: extraArgs,
method: "POST",
api: "_optimize",
}
return r.Run()
}
// Stats fetches statistics (_stats) for the current elasticsearch server
func (c *Connection) Stats(indexList []string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
IndexList: indexList,
ExtraArgs: extraArgs,
method: "GET",
api: "_stats",
}
return r.Run()
}
// IndexStatus fetches the status (_status) for the indices defined in
// indexList. Use _all in indexList to get stats for all indices
func (c *Connection) IndexStatus(indexList []string) (*Response, error) {
r := Request{
Conn: c,
IndexList: indexList,
method: "GET",
api: "_status",
}
return r.Run()
}
// Bulk adds multiple documents in bulk mode
func (c *Connection) BulkSend(documents []Document) (*Response, error) {
// We do not generate a traditional JSON here (often a one liner)
// Elasticsearch expects one line of JSON per line (EOL = \n)
// plus an extra \n at the very end of the document
//
// More informations about the Bulk JSON format for Elasticsearch:
//
// - http://www.elasticsearch.org/guide/reference/api/bulk.html
//
// This is quite annoying for us as we can not use the simple JSON
// Marshaler available in Run().
//
// We have to generate this special JSON by ourselves which leads to
// the code below.
//
// I know it is unreadable I must find an elegant way to fix this.
// len(documents) * 2 : action + optional_sources
// + 1 : room for the trailing \n
bulkData := make([][]byte, len(documents)*2+1)
i := 0
for _, doc := range documents {
action, err := json.Marshal(map[string]interface{}{
doc.BulkCommand: map[string]interface{}{
"_index": doc.Index,
"_type": doc.Type,
"_id": doc.Id,
},
})
if err != nil {
return &Response{}, err
}
bulkData[i] = action
i++
if doc.Fields != nil {
if docFields, ok := doc.Fields.(map[string]interface{}); ok {
if len(docFields) == 0 {
continue
}
} else {
typeOfFields := reflect.TypeOf(doc.Fields)
if typeOfFields.Kind() == reflect.Ptr {
typeOfFields = typeOfFields.Elem()
}
if typeOfFields.Kind() != reflect.Struct {
return &Response{}, fmt.Errorf("Document fields not in struct or map[string]interface{} format")
}
if typeOfFields.NumField() == 0 {
continue
}
}
sources, err := json.Marshal(doc.Fields)
if err != nil {
return &Response{}, err
}
bulkData[i] = sources
i++
}
}
// forces an extra trailing \n absolutely necessary for elasticsearch
bulkData[len(bulkData)-1] = []byte(nil)
r := Request{
Conn: c,
method: "POST",
api: "_bulk",
bulkData: bytes.Join(bulkData, []byte("\n")),
}
return r.Run()
}
// Search executes a search query against an index
func (c *Connection) Search(query interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
Query: query,
IndexList: indexList,
TypeList: typeList,
method: "POST",
api: "_search",
ExtraArgs: extraArgs,
}
return r.Run()
}
// Count executes a count query against an index, use the Count field in the response for the result
func (c *Connection) Count(query interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
Query: query,
IndexList: indexList,
TypeList: typeList,
method: "POST",
api: "_count",
ExtraArgs: extraArgs,
}
return r.Run()
}
//Query runs a query against an index using the provided http method.
//This method can be used to execute a delete by query, just pass in "DELETE"
//for the HTTP method.
func (c *Connection) Query(query interface{}, indexList []string, typeList []string, httpMethod string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
Query: query,
IndexList: indexList,
TypeList: typeList,
method: httpMethod,
api: "_query",
ExtraArgs: extraArgs,
}
return r.Run()
}
// Scan starts scroll over an index
func (c *Connection) Scan(query interface{}, indexList []string, typeList []string, timeout string, size int) (*Response, error) {
v := url.Values{}
v.Add("search_type", "scan")
v.Add("scroll", timeout)
v.Add("size", strconv.Itoa(size))
r := Request{
Conn: c,
Query: query,
IndexList: indexList,
TypeList: typeList,
method: "POST",
api: "_search",
ExtraArgs: v,
}
return r.Run()
}
// Scroll fetches data by scroll id
func (c *Connection) Scroll(scrollId string, timeout string) (*Response, error) {
v := url.Values{}
v.Add("scroll", timeout)
r := Request{
Conn: c,
method: "POST",
api: "_search/scroll",
ExtraArgs: v,
Body: []byte(scrollId),
}
return r.Run()
}
// Get a typed document by its id
func (c *Connection) Get(index string, documentType string, id string, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
IndexList: []string{index},
method: "GET",
api: documentType + "/" + id,
ExtraArgs: extraArgs,
}
return r.Run()
}
// Index indexes a Document
// The extraArgs is a list of url.Values that you can send to elasticsearch as
// URL arguments, for example, to control routing, ttl, version, op_type, etc.
func (c *Connection) Index(d Document, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
Query: d.Fields,
IndexList: []string{d.Index.(string)},
TypeList: []string{d.Type},
ExtraArgs: extraArgs,
method: "POST",
}
if d.Id != nil {
r.method = "PUT"
r.id = d.Id.(string)
}
return r.Run()
}
// Delete deletes a Document d
// The extraArgs is a list of url.Values that you can send to elasticsearch as
// URL arguments, for example, to control routing.
func (c *Connection) Delete(d Document, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
IndexList: []string{d.Index.(string)},
TypeList: []string{d.Type},
ExtraArgs: extraArgs,
method: "DELETE",
id: d.Id.(string),
}
return r.Run()
}
// Run executes an elasticsearch Request. It converts data to Json, sends the
// request and returns the Response obtained
func (req *Request) Run() (*Response, error) {
body, statusCode, err := req.run()
esResp := &Response{Status: statusCode}
if err != nil {
return esResp, err
}
if req.method != "HEAD" {
err = json.Unmarshal(body, &esResp)
if err != nil {
return esResp, err
}
err = json.Unmarshal(body, &esResp.Raw)
if err != nil {
return esResp, err
}
}
if req.api == "_bulk" && esResp.Errors {
for _, item := range esResp.Items {
for _, i := range item {
if i.Error != "" {
return esResp, &SearchError{i.Error, i.Status}
}
}
}
return esResp, &SearchError{Msg: "Unknown error while bulk indexing"}
}
if esResp.Error != "" {
return esResp, &SearchError{esResp.Error, esResp.Status}
}
return esResp, nil
}
func (req *Request) run() ([]byte, uint64, error) {
postData := []byte{}
// XXX : refactor this
if len(req.Body) > 0 {
postData = req.Body
} else if req.api == "_bulk" {
postData = req.bulkData
} else {
b, err := json.Marshal(req.Query)
if err != nil {
return nil, 0, err
}
postData = b
}
reader := bytes.NewReader(postData)
newReq, err := http.NewRequest(req.method, req.Url(), reader)
if err != nil {
return nil, 0, err
}
if req.method == "POST" || req.method == "PUT" {
newReq.Header.Set("Content-Type", "application/json")
}
resp, err := req.Conn.Client.Do(newReq)
if err != nil {
return nil, 0, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, uint64(resp.StatusCode), err
}
if resp.StatusCode > 201 && resp.StatusCode < 400 {
return nil, uint64(resp.StatusCode), errors.New(string(body))
}
return body, uint64(resp.StatusCode), nil
}
// Url builds a Request for a URL
func (r *Request) Url() string {
path := "/" + strings.Join(r.IndexList, ",")
if len(r.TypeList) > 0 {
path += "/" + strings.Join(r.TypeList, ",")
}
// XXX : for indexing documents using the normal (non bulk) API
if len(r.id) > 0 {
path += "/" + r.id
}
path += "/" + r.api
u := url.URL{
Scheme: "http",
Host: fmt.Sprintf("%s:%s", r.Conn.Host, r.Conn.Port),
Path: path,
RawQuery: r.ExtraArgs.Encode(),
}
return u.String()
}
// Buckets returns list of buckets in aggregation
func (a Aggregation) Buckets() []Bucket {
result := []Bucket{}
if buckets, ok := a["buckets"]; ok {
for _, bucket := range buckets.([]interface{}) {
result = append(result, bucket.(map[string]interface{}))
}
}
return result
}
// Key returns key for aggregation bucket
func (b Bucket) Key() interface{} {
return b["key"]
}
// DocCount returns count of documents in this bucket
func (b Bucket) DocCount() uint64 {
return uint64(b["doc_count"].(float64))
}
// Aggregation returns aggregation by name from bucket
func (b Bucket) Aggregation(name string) Aggregation {
if agg, ok := b[name]; ok {
return agg.(map[string]interface{})
} else {
return Aggregation{}
}
}
// PutMapping registers a specific mapping for one or more types in one or more indexes
func (c *Connection) PutMapping(typeName string, mapping interface{}, indexes []string) (*Response, error) {
r := Request{
Conn: c,
Query: mapping,
IndexList: indexes,
method: "PUT",
api: "_mappings/" + typeName,
}
return r.Run()
}
func (c *Connection) GetMapping(types []string, indexes []string) (*Response, error) {
r := Request{
Conn: c,
IndexList: indexes,
method: "GET",
api: "_mapping/" + strings.Join(types, ","),
}
return r.Run()
}
// IndicesExist checks whether index (or indices) exist on the server
func (c *Connection) IndicesExist(indexes []string) (bool, error) {
r := Request{
Conn: c,
IndexList: indexes,
method: "HEAD",
}
resp, err := r.Run()
return resp.Status == 200, err
}
func (c *Connection) Update(d Document, query interface{}, extraArgs url.Values) (*Response, error) {
r := Request{
Conn: c,
Query: query,
IndexList: []string{d.Index.(string)},
TypeList: []string{d.Type},
ExtraArgs: extraArgs,
method: "POST",
api: "_update",
}
if d.Id != nil {
r.id = d.Id.(string)
}
return r.Run()
}
// DeleteMapping deletes a mapping along with all data in the type
func (c *Connection) DeleteMapping(typeName string, indexes []string) (*Response, error) {
r := Request{
Conn: c,
IndexList: indexes,
method: "DELETE",
api: "_mappings/" + typeName,
}
return r.Run()
}
func (c *Connection) modifyAlias(action string, alias string, indexes []string) (*Response, error) {
command := map[string]interface{}{
"actions": make([]map[string]interface{}, 1),
}
for _, index := range indexes {
command["actions"] = append(command["actions"].([]map[string]interface{}), map[string]interface{}{
action: map[string]interface{}{
"index": index,
"alias": alias,
},
})
}
r := Request{
Conn: c,
Query: command,
method: "POST",
api: "_aliases",
}
return r.Run()
}
// AddAlias creates an alias to one or more indexes
func (c *Connection) AddAlias(alias string, indexes []string) (*Response, error) {
return c.modifyAlias("add", alias, indexes)
}
// RemoveAlias removes an alias to one or more indexes
func (c *Connection) RemoveAlias(alias string, indexes []string) (*Response, error) {
return c.modifyAlias("remove", alias, indexes)
}
// AliasExists checks whether alias is defined on the server
func (c *Connection) AliasExists(alias string) (bool, error) {
r := Request{
Conn: c,
method: "HEAD",
api: "_alias/" + alias,
}
resp, err := r.Run()
return resp.Status == 200, err
}

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// Copyright 2013 Belogik. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package goes
import (
"net/http"
"net/url"
)
// Represents a Connection object to elasticsearch
type Connection struct {
// The host to connect to
Host string
// The port to use
Port string
// Client is the http client used to make requests, allowing settings things
// such as timeouts etc
Client *http.Client
}
// Represents a Request to elasticsearch
type Request struct {
// Which connection will be used
Conn *Connection
// A search query
Query interface{}
// Which index to search into
IndexList []string
// Which type to search into
TypeList []string
// HTTP Method to user (GET, POST ...)
method string
// Which api keyword (_search, _bulk, etc) to use
api string
// Bulk data
bulkData []byte
// Request body
Body []byte
// A list of extra URL arguments
ExtraArgs url.Values
// Used for the id field when indexing a document
id string
}
// Represents a Response from elasticsearch
type Response struct {
Acknowledged bool
Error string
Errors bool
Status uint64
Took uint64
TimedOut bool `json:"timed_out"`
Shards Shard `json:"_shards"`
Hits Hits
Index string `json:"_index"`
Id string `json:"_id"`
Type string `json:"_type"`
Version int `json:"_version"`
Found bool
Count int
// Used by the _stats API
All All `json:"_all"`
// Used by the _bulk API
Items []map[string]Item `json:"items,omitempty"`
// Used by the GET API
Source map[string]interface{} `json:"_source"`
Fields map[string]interface{} `json:"fields"`
// Used by the _status API
Indices map[string]IndexStatus
// Scroll id for iteration
ScrollId string `json:"_scroll_id"`
Aggregations map[string]Aggregation `json:"aggregations,omitempty"`
Raw map[string]interface{}
}
// Represents an aggregation from response
type Aggregation map[string]interface{}
// Represents a bucket for aggregation
type Bucket map[string]interface{}
// Represents a document to send to elasticsearch
type Document struct {
// XXX : interface as we can support nil values
Index interface{}
Type string
Id interface{}
BulkCommand string
Fields interface{}
}
// Represents the "items" field in a _bulk response
type Item struct {
Type string `json:"_type"`
Id string `json:"_id"`
Index string `json:"_index"`
Version int `json:"_version"`
Error string `json:"error"`
Status uint64 `json:"status"`
}
// Represents the "_all" field when calling the _stats API
// This is minimal but this is what I only need
type All struct {
Indices map[string]StatIndex `json:"indices"`
Primaries map[string]StatPrimary `json:"primaries"`
}
type StatIndex struct {
Primaries map[string]StatPrimary `json:"primaries"`
}
type StatPrimary struct {
// primary/docs:
Count int
Deleted int
}
// Represents the "shard" struct as returned by elasticsearch
type Shard struct {
Total uint64
Successful uint64
Failed uint64
}
// Represent a hit returned by a search
type Hit struct {
Index string `json:"_index"`
Type string `json:"_type"`
Id string `json:"_id"`
Score float64 `json:"_score"`
Source map[string]interface{} `json:"_source"`
Highlight map[string]interface{} `json:"highlight"`
Fields map[string]interface{} `json:"fields"`
}
// Represent the hits structure as returned by elasticsearch
type Hits struct {
Total uint64
// max_score may contain the "null" value
MaxScore interface{} `json:"max_score"`
Hits []Hit
}
type SearchError struct {
Msg string
StatusCode uint64
}
// Represent the status for a given index for the _status command
type IndexStatus struct {
// XXX : problem, int will be marshaled to a float64 which seems logical
// XXX : is it better to use strings even for int values or to keep
// XXX : interfaces and deal with float64 ?
Index map[string]interface{}
Translog map[string]uint64
Docs map[string]uint64
Merges map[string]interface{}
Refresh map[string]interface{}
Flush map[string]interface{}
// TODO: add shards support later, we do not need it for the moment
}

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
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including but not limited to software source code, documentation
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"Work" shall mean the work of authorship, whether in Source or
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unless required by applicable law (such as deliberate and grossly
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has been advised of the possibility of such damages.
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the Work or Derivative Works thereof, You may choose to offer,
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or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
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boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
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Licensed under the Apache License, Version 2.0 (the "License");
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687
vendor/github.com/bradfitz/gomemcache/memcache/memcache.go generated vendored Normal file
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/*
Copyright 2011 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Package memcache provides a client for the memcached cache server.
package memcache
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"net"
"strconv"
"strings"
"sync"
"time"
)
// Similar to:
// https://godoc.org/google.golang.org/appengine/memcache
var (
// ErrCacheMiss means that a Get failed because the item wasn't present.
ErrCacheMiss = errors.New("memcache: cache miss")
// ErrCASConflict means that a CompareAndSwap call failed due to the
// cached value being modified between the Get and the CompareAndSwap.
// If the cached value was simply evicted rather than replaced,
// ErrNotStored will be returned instead.
ErrCASConflict = errors.New("memcache: compare-and-swap conflict")
// ErrNotStored means that a conditional write operation (i.e. Add or
// CompareAndSwap) failed because the condition was not satisfied.
ErrNotStored = errors.New("memcache: item not stored")
// ErrServer means that a server error occurred.
ErrServerError = errors.New("memcache: server error")
// ErrNoStats means that no statistics were available.
ErrNoStats = errors.New("memcache: no statistics available")
// ErrMalformedKey is returned when an invalid key is used.
// Keys must be at maximum 250 bytes long and not
// contain whitespace or control characters.
ErrMalformedKey = errors.New("malformed: key is too long or contains invalid characters")
// ErrNoServers is returned when no servers are configured or available.
ErrNoServers = errors.New("memcache: no servers configured or available")
)
const (
// DefaultTimeout is the default socket read/write timeout.
DefaultTimeout = 100 * time.Millisecond
// DefaultMaxIdleConns is the default maximum number of idle connections
// kept for any single address.
DefaultMaxIdleConns = 2
)
const buffered = 8 // arbitrary buffered channel size, for readability
// resumableError returns true if err is only a protocol-level cache error.
// This is used to determine whether or not a server connection should
// be re-used or not. If an error occurs, by default we don't reuse the
// connection, unless it was just a cache error.
func resumableError(err error) bool {
switch err {
case ErrCacheMiss, ErrCASConflict, ErrNotStored, ErrMalformedKey:
return true
}
return false
}
func legalKey(key string) bool {
if len(key) > 250 {
return false
}
for i := 0; i < len(key); i++ {
if key[i] <= ' ' || key[i] == 0x7f {
return false
}
}
return true
}
var (
crlf = []byte("\r\n")
space = []byte(" ")
resultOK = []byte("OK\r\n")
resultStored = []byte("STORED\r\n")
resultNotStored = []byte("NOT_STORED\r\n")
resultExists = []byte("EXISTS\r\n")
resultNotFound = []byte("NOT_FOUND\r\n")
resultDeleted = []byte("DELETED\r\n")
resultEnd = []byte("END\r\n")
resultOk = []byte("OK\r\n")
resultTouched = []byte("TOUCHED\r\n")
resultClientErrorPrefix = []byte("CLIENT_ERROR ")
)
// New returns a memcache client using the provided server(s)
// with equal weight. If a server is listed multiple times,
// it gets a proportional amount of weight.
func New(server ...string) *Client {
ss := new(ServerList)
ss.SetServers(server...)
return NewFromSelector(ss)
}
// NewFromSelector returns a new Client using the provided ServerSelector.
func NewFromSelector(ss ServerSelector) *Client {
return &Client{selector: ss}
}
// Client is a memcache client.
// It is safe for unlocked use by multiple concurrent goroutines.
type Client struct {
// Timeout specifies the socket read/write timeout.
// If zero, DefaultTimeout is used.
Timeout time.Duration
// MaxIdleConns specifies the maximum number of idle connections that will
// be maintained per address. If less than one, DefaultMaxIdleConns will be
// used.
//
// Consider your expected traffic rates and latency carefully. This should
// be set to a number higher than your peak parallel requests.
MaxIdleConns int
selector ServerSelector
lk sync.Mutex
freeconn map[string][]*conn
}
// Item is an item to be got or stored in a memcached server.
type Item struct {
// Key is the Item's key (250 bytes maximum).
Key string
// Value is the Item's value.
Value []byte
// Flags are server-opaque flags whose semantics are entirely
// up to the app.
Flags uint32
// Expiration is the cache expiration time, in seconds: either a relative
// time from now (up to 1 month), or an absolute Unix epoch time.
// Zero means the Item has no expiration time.
Expiration int32
// Compare and swap ID.
casid uint64
}
// conn is a connection to a server.
type conn struct {
nc net.Conn
rw *bufio.ReadWriter
addr net.Addr
c *Client
}
// release returns this connection back to the client's free pool
func (cn *conn) release() {
cn.c.putFreeConn(cn.addr, cn)
}
func (cn *conn) extendDeadline() {
cn.nc.SetDeadline(time.Now().Add(cn.c.netTimeout()))
}
// condRelease releases this connection if the error pointed to by err
// is nil (not an error) or is only a protocol level error (e.g. a
// cache miss). The purpose is to not recycle TCP connections that
// are bad.
func (cn *conn) condRelease(err *error) {
if *err == nil || resumableError(*err) {
cn.release()
} else {
cn.nc.Close()
}
}
func (c *Client) putFreeConn(addr net.Addr, cn *conn) {
c.lk.Lock()
defer c.lk.Unlock()
if c.freeconn == nil {
c.freeconn = make(map[string][]*conn)
}
freelist := c.freeconn[addr.String()]
if len(freelist) >= c.maxIdleConns() {
cn.nc.Close()
return
}
c.freeconn[addr.String()] = append(freelist, cn)
}
func (c *Client) getFreeConn(addr net.Addr) (cn *conn, ok bool) {
c.lk.Lock()
defer c.lk.Unlock()
if c.freeconn == nil {
return nil, false
}
freelist, ok := c.freeconn[addr.String()]
if !ok || len(freelist) == 0 {
return nil, false
}
cn = freelist[len(freelist)-1]
c.freeconn[addr.String()] = freelist[:len(freelist)-1]
return cn, true
}
func (c *Client) netTimeout() time.Duration {
if c.Timeout != 0 {
return c.Timeout
}
return DefaultTimeout
}
func (c *Client) maxIdleConns() int {
if c.MaxIdleConns > 0 {
return c.MaxIdleConns
}
return DefaultMaxIdleConns
}
// ConnectTimeoutError is the error type used when it takes
// too long to connect to the desired host. This level of
// detail can generally be ignored.
type ConnectTimeoutError struct {
Addr net.Addr
}
func (cte *ConnectTimeoutError) Error() string {
return "memcache: connect timeout to " + cte.Addr.String()
}
func (c *Client) dial(addr net.Addr) (net.Conn, error) {
type connError struct {
cn net.Conn
err error
}
nc, err := net.DialTimeout(addr.Network(), addr.String(), c.netTimeout())
if err == nil {
return nc, nil
}
if ne, ok := err.(net.Error); ok && ne.Timeout() {
return nil, &ConnectTimeoutError{addr}
}
return nil, err
}
func (c *Client) getConn(addr net.Addr) (*conn, error) {
cn, ok := c.getFreeConn(addr)
if ok {
cn.extendDeadline()
return cn, nil
}
nc, err := c.dial(addr)
if err != nil {
return nil, err
}
cn = &conn{
nc: nc,
addr: addr,
rw: bufio.NewReadWriter(bufio.NewReader(nc), bufio.NewWriter(nc)),
c: c,
}
cn.extendDeadline()
return cn, nil
}
func (c *Client) onItem(item *Item, fn func(*Client, *bufio.ReadWriter, *Item) error) error {
addr, err := c.selector.PickServer(item.Key)
if err != nil {
return err
}
cn, err := c.getConn(addr)
if err != nil {
return err
}
defer cn.condRelease(&err)
if err = fn(c, cn.rw, item); err != nil {
return err
}
return nil
}
func (c *Client) FlushAll() error {
return c.selector.Each(c.flushAllFromAddr)
}
// Get gets the item for the given key. ErrCacheMiss is returned for a
// memcache cache miss. The key must be at most 250 bytes in length.
func (c *Client) Get(key string) (item *Item, err error) {
err = c.withKeyAddr(key, func(addr net.Addr) error {
return c.getFromAddr(addr, []string{key}, func(it *Item) { item = it })
})
if err == nil && item == nil {
err = ErrCacheMiss
}
return
}
// Touch updates the expiry for the given key. The seconds parameter is either
// a Unix timestamp or, if seconds is less than 1 month, the number of seconds
// into the future at which time the item will expire. Zero means the item has
// no expiration time. ErrCacheMiss is returned if the key is not in the cache.
// The key must be at most 250 bytes in length.
func (c *Client) Touch(key string, seconds int32) (err error) {
return c.withKeyAddr(key, func(addr net.Addr) error {
return c.touchFromAddr(addr, []string{key}, seconds)
})
}
func (c *Client) withKeyAddr(key string, fn func(net.Addr) error) (err error) {
if !legalKey(key) {
return ErrMalformedKey
}
addr, err := c.selector.PickServer(key)
if err != nil {
return err
}
return fn(addr)
}
func (c *Client) withAddrRw(addr net.Addr, fn func(*bufio.ReadWriter) error) (err error) {
cn, err := c.getConn(addr)
if err != nil {
return err
}
defer cn.condRelease(&err)
return fn(cn.rw)
}
func (c *Client) withKeyRw(key string, fn func(*bufio.ReadWriter) error) error {
return c.withKeyAddr(key, func(addr net.Addr) error {
return c.withAddrRw(addr, fn)
})
}
func (c *Client) getFromAddr(addr net.Addr, keys []string, cb func(*Item)) error {
return c.withAddrRw(addr, func(rw *bufio.ReadWriter) error {
if _, err := fmt.Fprintf(rw, "gets %s\r\n", strings.Join(keys, " ")); err != nil {
return err
}
if err := rw.Flush(); err != nil {
return err
}
if err := parseGetResponse(rw.Reader, cb); err != nil {
return err
}
return nil
})
}
// flushAllFromAddr send the flush_all command to the given addr
func (c *Client) flushAllFromAddr(addr net.Addr) error {
return c.withAddrRw(addr, func(rw *bufio.ReadWriter) error {
if _, err := fmt.Fprintf(rw, "flush_all\r\n"); err != nil {
return err
}
if err := rw.Flush(); err != nil {
return err
}
line, err := rw.ReadSlice('\n')
if err != nil {
return err
}
switch {
case bytes.Equal(line, resultOk):
break
default:
return fmt.Errorf("memcache: unexpected response line from flush_all: %q", string(line))
}
return nil
})
}
func (c *Client) touchFromAddr(addr net.Addr, keys []string, expiration int32) error {
return c.withAddrRw(addr, func(rw *bufio.ReadWriter) error {
for _, key := range keys {
if _, err := fmt.Fprintf(rw, "touch %s %d\r\n", key, expiration); err != nil {
return err
}
if err := rw.Flush(); err != nil {
return err
}
line, err := rw.ReadSlice('\n')
if err != nil {
return err
}
switch {
case bytes.Equal(line, resultTouched):
break
case bytes.Equal(line, resultNotFound):
return ErrCacheMiss
default:
return fmt.Errorf("memcache: unexpected response line from touch: %q", string(line))
}
}
return nil
})
}
// GetMulti is a batch version of Get. The returned map from keys to
// items may have fewer elements than the input slice, due to memcache
// cache misses. Each key must be at most 250 bytes in length.
// If no error is returned, the returned map will also be non-nil.
func (c *Client) GetMulti(keys []string) (map[string]*Item, error) {
var lk sync.Mutex
m := make(map[string]*Item)
addItemToMap := func(it *Item) {
lk.Lock()
defer lk.Unlock()
m[it.Key] = it
}
keyMap := make(map[net.Addr][]string)
for _, key := range keys {
if !legalKey(key) {
return nil, ErrMalformedKey
}
addr, err := c.selector.PickServer(key)
if err != nil {
return nil, err
}
keyMap[addr] = append(keyMap[addr], key)
}
ch := make(chan error, buffered)
for addr, keys := range keyMap {
go func(addr net.Addr, keys []string) {
ch <- c.getFromAddr(addr, keys, addItemToMap)
}(addr, keys)
}
var err error
for _ = range keyMap {
if ge := <-ch; ge != nil {
err = ge
}
}
return m, err
}
// parseGetResponse reads a GET response from r and calls cb for each
// read and allocated Item
func parseGetResponse(r *bufio.Reader, cb func(*Item)) error {
for {
line, err := r.ReadSlice('\n')
if err != nil {
return err
}
if bytes.Equal(line, resultEnd) {
return nil
}
it := new(Item)
size, err := scanGetResponseLine(line, it)
if err != nil {
return err
}
it.Value = make([]byte, size+2)
_, err = io.ReadFull(r, it.Value)
if err != nil {
it.Value = nil
return err
}
if !bytes.HasSuffix(it.Value, crlf) {
it.Value = nil
return fmt.Errorf("memcache: corrupt get result read")
}
it.Value = it.Value[:size]
cb(it)
}
}
// scanGetResponseLine populates it and returns the declared size of the item.
// It does not read the bytes of the item.
func scanGetResponseLine(line []byte, it *Item) (size int, err error) {
pattern := "VALUE %s %d %d %d\r\n"
dest := []interface{}{&it.Key, &it.Flags, &size, &it.casid}
if bytes.Count(line, space) == 3 {
pattern = "VALUE %s %d %d\r\n"
dest = dest[:3]
}
n, err := fmt.Sscanf(string(line), pattern, dest...)
if err != nil || n != len(dest) {
return -1, fmt.Errorf("memcache: unexpected line in get response: %q", line)
}
return size, nil
}
// Set writes the given item, unconditionally.
func (c *Client) Set(item *Item) error {
return c.onItem(item, (*Client).set)
}
func (c *Client) set(rw *bufio.ReadWriter, item *Item) error {
return c.populateOne(rw, "set", item)
}
// Add writes the given item, if no value already exists for its
// key. ErrNotStored is returned if that condition is not met.
func (c *Client) Add(item *Item) error {
return c.onItem(item, (*Client).add)
}
func (c *Client) add(rw *bufio.ReadWriter, item *Item) error {
return c.populateOne(rw, "add", item)
}
// Replace writes the given item, but only if the server *does*
// already hold data for this key
func (c *Client) Replace(item *Item) error {
return c.onItem(item, (*Client).replace)
}
func (c *Client) replace(rw *bufio.ReadWriter, item *Item) error {
return c.populateOne(rw, "replace", item)
}
// CompareAndSwap writes the given item that was previously returned
// by Get, if the value was neither modified or evicted between the
// Get and the CompareAndSwap calls. The item's Key should not change
// between calls but all other item fields may differ. ErrCASConflict
// is returned if the value was modified in between the
// calls. ErrNotStored is returned if the value was evicted in between
// the calls.
func (c *Client) CompareAndSwap(item *Item) error {
return c.onItem(item, (*Client).cas)
}
func (c *Client) cas(rw *bufio.ReadWriter, item *Item) error {
return c.populateOne(rw, "cas", item)
}
func (c *Client) populateOne(rw *bufio.ReadWriter, verb string, item *Item) error {
if !legalKey(item.Key) {
return ErrMalformedKey
}
var err error
if verb == "cas" {
_, err = fmt.Fprintf(rw, "%s %s %d %d %d %d\r\n",
verb, item.Key, item.Flags, item.Expiration, len(item.Value), item.casid)
} else {
_, err = fmt.Fprintf(rw, "%s %s %d %d %d\r\n",
verb, item.Key, item.Flags, item.Expiration, len(item.Value))
}
if err != nil {
return err
}
if _, err = rw.Write(item.Value); err != nil {
return err
}
if _, err := rw.Write(crlf); err != nil {
return err
}
if err := rw.Flush(); err != nil {
return err
}
line, err := rw.ReadSlice('\n')
if err != nil {
return err
}
switch {
case bytes.Equal(line, resultStored):
return nil
case bytes.Equal(line, resultNotStored):
return ErrNotStored
case bytes.Equal(line, resultExists):
return ErrCASConflict
case bytes.Equal(line, resultNotFound):
return ErrCacheMiss
}
return fmt.Errorf("memcache: unexpected response line from %q: %q", verb, string(line))
}
func writeReadLine(rw *bufio.ReadWriter, format string, args ...interface{}) ([]byte, error) {
_, err := fmt.Fprintf(rw, format, args...)
if err != nil {
return nil, err
}
if err := rw.Flush(); err != nil {
return nil, err
}
line, err := rw.ReadSlice('\n')
return line, err
}
func writeExpectf(rw *bufio.ReadWriter, expect []byte, format string, args ...interface{}) error {
line, err := writeReadLine(rw, format, args...)
if err != nil {
return err
}
switch {
case bytes.Equal(line, resultOK):
return nil
case bytes.Equal(line, expect):
return nil
case bytes.Equal(line, resultNotStored):
return ErrNotStored
case bytes.Equal(line, resultExists):
return ErrCASConflict
case bytes.Equal(line, resultNotFound):
return ErrCacheMiss
}
return fmt.Errorf("memcache: unexpected response line: %q", string(line))
}
// Delete deletes the item with the provided key. The error ErrCacheMiss is
// returned if the item didn't already exist in the cache.
func (c *Client) Delete(key string) error {
return c.withKeyRw(key, func(rw *bufio.ReadWriter) error {
return writeExpectf(rw, resultDeleted, "delete %s\r\n", key)
})
}
// DeleteAll deletes all items in the cache.
func (c *Client) DeleteAll() error {
return c.withKeyRw("", func(rw *bufio.ReadWriter) error {
return writeExpectf(rw, resultDeleted, "flush_all\r\n")
})
}
// Increment atomically increments key by delta. The return value is
// the new value after being incremented or an error. If the value
// didn't exist in memcached the error is ErrCacheMiss. The value in
// memcached must be an decimal number, or an error will be returned.
// On 64-bit overflow, the new value wraps around.
func (c *Client) Increment(key string, delta uint64) (newValue uint64, err error) {
return c.incrDecr("incr", key, delta)
}
// Decrement atomically decrements key by delta. The return value is
// the new value after being decremented or an error. If the value
// didn't exist in memcached the error is ErrCacheMiss. The value in
// memcached must be an decimal number, or an error will be returned.
// On underflow, the new value is capped at zero and does not wrap
// around.
func (c *Client) Decrement(key string, delta uint64) (newValue uint64, err error) {
return c.incrDecr("decr", key, delta)
}
func (c *Client) incrDecr(verb, key string, delta uint64) (uint64, error) {
var val uint64
err := c.withKeyRw(key, func(rw *bufio.ReadWriter) error {
line, err := writeReadLine(rw, "%s %s %d\r\n", verb, key, delta)
if err != nil {
return err
}
switch {
case bytes.Equal(line, resultNotFound):
return ErrCacheMiss
case bytes.HasPrefix(line, resultClientErrorPrefix):
errMsg := line[len(resultClientErrorPrefix) : len(line)-2]
return errors.New("memcache: client error: " + string(errMsg))
}
val, err = strconv.ParseUint(string(line[:len(line)-2]), 10, 64)
if err != nil {
return err
}
return nil
})
return val, err
}

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/*
Copyright 2011 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package memcache
import (
"hash/crc32"
"net"
"strings"
"sync"
)
// ServerSelector is the interface that selects a memcache server
// as a function of the item's key.
//
// All ServerSelector implementations must be safe for concurrent use
// by multiple goroutines.
type ServerSelector interface {
// PickServer returns the server address that a given item
// should be shared onto.
PickServer(key string) (net.Addr, error)
Each(func(net.Addr) error) error
}
// ServerList is a simple ServerSelector. Its zero value is usable.
type ServerList struct {
mu sync.RWMutex
addrs []net.Addr
}
// staticAddr caches the Network() and String() values from any net.Addr.
type staticAddr struct {
ntw, str string
}
func newStaticAddr(a net.Addr) net.Addr {
return &staticAddr{
ntw: a.Network(),
str: a.String(),
}
}
func (s *staticAddr) Network() string { return s.ntw }
func (s *staticAddr) String() string { return s.str }
// SetServers changes a ServerList's set of servers at runtime and is
// safe for concurrent use by multiple goroutines.
//
// Each server is given equal weight. A server is given more weight
// if it's listed multiple times.
//
// SetServers returns an error if any of the server names fail to
// resolve. No attempt is made to connect to the server. If any error
// is returned, no changes are made to the ServerList.
func (ss *ServerList) SetServers(servers ...string) error {
naddr := make([]net.Addr, len(servers))
for i, server := range servers {
if strings.Contains(server, "/") {
addr, err := net.ResolveUnixAddr("unix", server)
if err != nil {
return err
}
naddr[i] = newStaticAddr(addr)
} else {
tcpaddr, err := net.ResolveTCPAddr("tcp", server)
if err != nil {
return err
}
naddr[i] = newStaticAddr(tcpaddr)
}
}
ss.mu.Lock()
defer ss.mu.Unlock()
ss.addrs = naddr
return nil
}
// Each iterates over each server calling the given function
func (ss *ServerList) Each(f func(net.Addr) error) error {
ss.mu.RLock()
defer ss.mu.RUnlock()
for _, a := range ss.addrs {
if err := f(a); nil != err {
return err
}
}
return nil
}
// keyBufPool returns []byte buffers for use by PickServer's call to
// crc32.ChecksumIEEE to avoid allocations. (but doesn't avoid the
// copies, which at least are bounded in size and small)
var keyBufPool = sync.Pool{
New: func() interface{} {
b := make([]byte, 256)
return &b
},
}
func (ss *ServerList) PickServer(key string) (net.Addr, error) {
ss.mu.RLock()
defer ss.mu.RUnlock()
if len(ss.addrs) == 0 {
return nil, ErrNoServers
}
if len(ss.addrs) == 1 {
return ss.addrs[0], nil
}
bufp := keyBufPool.Get().(*[]byte)
n := copy(*bufp, key)
cs := crc32.ChecksumIEEE((*bufp)[:n])
keyBufPool.Put(bufp)
return ss.addrs[cs%uint32(len(ss.addrs))], nil
}

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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof
.idea/
*.iml

12
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@ -0,0 +1,12 @@
language: go
sudo: false
go:
- tip
before_install:
- go get github.com/mattn/goveralls
script:
- $HOME/gopath/bin/goveralls -service=travis-ci

201
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@ -0,0 +1,201 @@
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366
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Casbin
====
[![Go Report Card](https://goreportcard.com/badge/github.com/casbin/casbin)](https://goreportcard.com/report/github.com/casbin/casbin)
[![Build Status](https://travis-ci.org/casbin/casbin.svg?branch=master)](https://travis-ci.org/casbin/casbin)
[![Coverage Status](https://coveralls.io/repos/github/casbin/casbin/badge.svg?branch=master)](https://coveralls.io/github/casbin/casbin?branch=master)
[![Godoc](https://godoc.org/github.com/casbin/casbin?status.svg)](https://godoc.org/github.com/casbin/casbin)
[![Release](https://img.shields.io/github/release/casbin/casbin.svg)](https://github.com/casbin/casbin/releases/latest)
[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/casbin/lobby)
[![Patreon](https://img.shields.io/badge/patreon-donate-yellow.svg)](http://www.patreon.com/yangluo)
[![Sourcegraph Badge](https://sourcegraph.com/github.com/casbin/casbin/-/badge.svg)](https://sourcegraph.com/github.com/casbin/casbin?badge)
**News**: still worry about how to write the correct Casbin policy? ``Casbin online editor`` is coming to help! Try it at: http://casbin.org/editor/
![casbin Logo](casbin-logo.png)
Casbin is a powerful and efficient open-source access control library for Golang projects. It provides support for enforcing authorization based on various [access control models](https://en.wikipedia.org/wiki/Computer_security_model).
## All the languages supported by Casbin:
- Golang: [Casbin](https://github.com/casbin/casbin) (production-ready)
- Java: [jCasbin](https://github.com/casbin/jcasbin) (production-ready)
- PHP: [PHP-Casbin](https://github.com/sstutz/php-casbin) (experimental)
- Node.js: [node-casbin](https://github.com/casbin/node-casbin) (WIP)
- C++: xCasbin (WIP)
## Table of contents
- [Supported models](#supported-models)
- [How it works?](#how-it-works)
- [Features](#features)
- [Installation](#installation)
- [Documentation](#documentation)
- [Online editor](#online-editor)
- [Tutorials](#tutorials)
- [Get started](#get-started)
- [Policy management](#policy-management)
- [Policy persistence](#policy-persistence)
- [Policy consistence between multiple nodes](#policy-consistence-between-multiple-nodes)
- [Role manager](#role-manager)
- [Multi-threading](#multi-threading)
- [Benchmarks](#benchmarks)
- [Examples](#examples)
- [How to use Casbin as a service?](#how-to-use-casbin-as-a-service)
- [Our adopters](#our-adopters)
## Supported models
1. [**ACL (Access Control List)**](https://en.wikipedia.org/wiki/Access_control_list)
2. **ACL with [superuser](https://en.wikipedia.org/wiki/Superuser)**
3. **ACL without users**: especially useful for systems that don't have authentication or user log-ins.
3. **ACL without resources**: some scenarios may target for a type of resources instead of an individual resource by using permissions like ``write-article``, ``read-log``. It doesn't control the access to a specific article or log.
4. **[RBAC (Role-Based Access Control)](https://en.wikipedia.org/wiki/Role-based_access_control)**
5. **RBAC with resource roles**: both users and resources can have roles (or groups) at the same time.
6. **RBAC with domains/tenants**: users can have different role sets for different domains/tenants.
7. **[ABAC (Attribute-Based Access Control)](https://en.wikipedia.org/wiki/Attribute-Based_Access_Control)**: syntax sugar like ``resource.Owner`` can be used to get the attribute for a resource.
8. **[RESTful](https://en.wikipedia.org/wiki/Representational_state_transfer)**: supports paths like ``/res/*``, ``/res/:id`` and HTTP methods like ``GET``, ``POST``, ``PUT``, ``DELETE``.
9. **Deny-override**: both allow and deny authorizations are supported, deny overrides the allow.
10. **Priority**: the policy rules can be prioritized like firewall rules.
## How it works?
In Casbin, an access control model is abstracted into a CONF file based on the **PERM metamodel (Policy, Effect, Request, Matchers)**. So switching or upgrading the authorization mechanism for a project is just as simple as modifying a configuration. You can customize your own access control model by combining the available models. For example, you can get RBAC roles and ABAC attributes together inside one model and share one set of policy rules.
The most basic and simplest model in Casbin is ACL. ACL's model CONF is:
```ini
# Request definition
[request_definition]
r = sub, obj, act
# Policy definition
[policy_definition]
p = sub, obj, act
# Policy effect
[policy_effect]
e = some(where (p.eft == allow))
# Matchers
[matchers]
m = r.sub == p.sub && r.obj == p.obj && r.act == p.act
# We also support multi-line mode by appending '\' in the end:
# m = r.sub == p.sub && r.obj == p.obj \
# && r.act == p.act
```
An example policy for ACL model is like:
```
p, alice, data1, read
p, bob, data2, write
```
It means:
- alice can read data1
- bob can write data2
## Features
What Casbin does:
1. enforce the policy in the classic ``{subject, object, action}`` form or a customized form as you defined, both allow and deny authorizations are supported.
2. handle the storage of the access control model and its policy.
3. manage the role-user mappings and role-role mappings (aka role hierarchy in RBAC).
4. support built-in superuser like ``root`` or ``administrator``. A superuser can do anything without explict permissions.
5. multiple built-in operators to support the rule matching. For example, ``keyMatch`` can map a resource key ``/foo/bar`` to the pattern ``/foo*``.
What Casbin does NOT do:
1. authentication (aka verify ``username`` and ``password`` when a user logs in)
2. manage the list of users or roles. I believe it's more convenient for the project itself to manage these entities. Users usually have their passwords, and Casbin is not designed as a password container. However, Casbin stores the user-role mapping for the RBAC scenario.
## Installation
```
go get github.com/casbin/casbin
```
## Documentation
For documentation, please see: [Our Wiki](https://github.com/casbin/casbin/wiki)
## Online editor
You can also use the online editor (http://casbin.org/editor/) to write your Casbin model and policy in your web browser. It provides functionality such as ``syntax highlighting`` and ``code completion``, just like an IDE for a programming language.
## Tutorials
- [Basic Role-Based HTTP Authorization in Go with Casbin](https://zupzup.org/casbin-http-role-auth) (or [Chinese translation](https://studygolang.com/articles/12323))
- [Policy enforcements on Kubernetes with Banzai Cloud's Pipeline and Casbin](https://banzaicloud.com/blog/policy-enforcement-k8s/)
- [Using Casbin with Beego: 1. Get started and test (in Chinese)](https://blog.csdn.net/hotqin888/article/details/78460385)
- [Using Casbin with Beego: 2. Policy storage (in Chinese)](https://blog.csdn.net/hotqin888/article/details/78571240)
- [Using Casbin with Beego: 3. Policy query (in Chinese)](https://blog.csdn.net/hotqin888/article/details/78992250)
- [Using Casbin with Beego: 4. Policy update (in Chinese)](https://blog.csdn.net/hotqin888/article/details/80032538)
## Get started
1. New a Casbin enforcer with a model file and a policy file:
```go
e := casbin.NewEnforcer("path/to/model.conf", "path/to/policy.csv")
```
Note: you can also initialize an enforcer with policy in DB instead of file, see [Persistence](#persistence) section for details.
2. Add an enforcement hook into your code right before the access happens:
```go
sub := "alice" // the user that wants to access a resource.
obj := "data1" // the resource that is going to be accessed.
act := "read" // the operation that the user performs on the resource.
if e.Enforce(sub, obj, act) == true {
// permit alice to read data1
} else {
// deny the request, show an error
}
```
3. Besides the static policy file, Casbin also provides API for permission management at run-time. For example, You can get all the roles assigned to a user as below:
```go
roles := e.GetRoles("alice")
```
See [Policy management APIs](#policy-management) for more usage.
4. Please refer to the ``_test.go`` files for more usage.
## Policy management
Casbin provides two sets of APIs to manage permissions:
- [Management API](https://github.com/casbin/casbin/blob/master/management_api.go): the primitive API that provides full support for Casbin policy management. See [here](https://github.com/casbin/casbin/blob/master/management_api_test.go) for examples.
- [RBAC API](https://github.com/casbin/casbin/blob/master/rbac_api.go): a more friendly API for RBAC. This API is a subset of Management API. The RBAC users could use this API to simplify the code. See [here](https://github.com/casbin/casbin/blob/master/rbac_api_test.go) for examples.
We also provide a web-based UI for model management and policy management:
![model editor](https://hsluoyz.github.io/casbin/ui_model_editor.png)
![policy editor](https://hsluoyz.github.io/casbin/ui_policy_editor.png)
## Policy persistence
In Casbin, the policy storage is implemented as an adapter (aka middleware for Casbin). To keep light-weight, we don't put adapter code in the main library (except the default file adapter). A complete list of Casbin adapters is provided as below. Any 3rd-party contribution on a new adapter is welcomed, please inform us and I will put it in this list:)
Adapter | Type | Author | Description
----|------|----|----
[File Adapter (built-in)](https://github.com/casbin/casbin/wiki/Policy-persistence#file-adapter) | File | Casbin | Persistence for [.CSV (Comma-Separated Values)](https://en.wikipedia.org/wiki/Comma-separated_values) files
[Filtered File Adapter (built-in)](https://github.com/casbin/casbin#policy-enforcement-at-scale) | File | [@faceless-saint](https://github.com/faceless-saint) | Persistence for [.CSV (Comma-Separated Values)](https://en.wikipedia.org/wiki/Comma-separated_values) files with policy subset loading support
[Xorm Adapter](https://github.com/casbin/xorm-adapter) | ORM | Casbin | MySQL, PostgreSQL, TiDB, SQLite, SQL Server, Oracle are supported by [Xorm](https://github.com/go-xorm/xorm/)
[Gorm Adapter](https://github.com/casbin/gorm-adapter) | ORM | Casbin | MySQL, PostgreSQL, Sqlite3, SQL Server are supported by [Gorm](https://github.com/jinzhu/gorm/)
[Beego ORM Adapter](https://github.com/casbin/beego-orm-adapter) | ORM | Casbin | MySQL, PostgreSQL, Sqlite3 are supported by [Beego ORM](https://beego.me/docs/mvc/model/overview.md)
[MongoDB Adapter](https://github.com/casbin/mongodb-adapter) | NoSQL | Casbin | Persistence for [MongoDB](https://www.mongodb.com)
[Cassandra Adapter](https://github.com/casbin/cassandra-adapter) | NoSQL | Casbin | Persistence for [Apache Cassandra DB](http://cassandra.apache.org)
[Consul Adapter](https://github.com/ankitm123/consul-adapter) | KV store | [@ankitm123](https://github.com/ankitm123) | Persistence for [HashiCorp Consul](https://www.consul.io/)
[Redis Adapter](https://github.com/casbin/redis-adapter) | KV store | Casbin | Persistence for [Redis](https://redis.io/)
[Protobuf Adapter](https://github.com/casbin/protobuf-adapter) | Stream | Casbin | Persistence for [Google Protocol Buffers](https://developers.google.com/protocol-buffers/)
[JSON Adapter](https://github.com/casbin/json-adapter) | String | Casbin | Persistence for [JSON](https://www.json.org/)
[String Adapter](https://github.com/qiangmzsx/string-adapter) | String | [@qiangmzsx](https://github.com/qiangmzsx) | Persistence for String
[RQLite Adapter](https://github.com/edomosystems/rqlite-adapter) | SQL | [EDOMO Systems](https://github.com/edomosystems) | Persistence for [RQLite](https://github.com/rqlite/rqlite/)
[PostgreSQL Adapter](https://github.com/going/casbin-postgres-adapter) | SQL | [Going](https://github.com/going) | Persistence for [PostgreSQL](https://www.postgresql.org/)
[RethinkDB Adapter](https://github.com/adityapandey9/rethinkdb-adapter) | NoSQL | [@adityapandey9](https://github.com/adityapandey9) | Persistence for [RethinkDB](https://rethinkdb.com/)
[DynamoDB Adapter](https://github.com/HOOQTV/dynacasbin) | NoSQL | [HOOQ](https://github.com/HOOQTV) | Persistence for [Amazon DynamoDB](https://aws.amazon.com/dynamodb/)
[Minio/AWS S3 Adapter](https://github.com/Soluto/casbin-minio-adapter) | Object storage | [Soluto](https://github.com/Soluto) | Persistence for [Minio](https://github.com/minio/minio) and [Amazon S3](https://aws.amazon.com/s3/)
[Bolt Adapter](https://github.com/wirepair/bolt-adapter) | KV store | [@wirepair](https://github.com/wirepair) | Persistence for [Bolt](https://github.com/boltdb/bolt)
For details of adapters, please refer to the documentation: https://github.com/casbin/casbin/wiki/Policy-persistence
## Policy enforcement at scale
Some adapters support filtered policy management. This means that the policy loaded by Casbin is a subset of the policy in storage based on a given filter. This allows for efficient policy enforcement in large, multi-tenant environments when parsing the entire policy becomes a performance bottleneck.
To use filtered policies with a supported adapter, simply call the `LoadFilteredPolicy` method. The valid format for the filter parameter depends on the adapter used. To prevent accidental data loss, the `SavePolicy` method is disabled when a filtered policy is loaded.
For example, the following code snippet uses the built-in filtered file adapter and the RBAC model with domains. In this case, the filter limits the policy to a single domain. Any policy lines for domains other than `"domain1"` are omitted from the loaded policy:
```go
import (
"github.com/casbin/casbin"
)
enforcer := casbin.NewEnforcer()
adapter := fileadapter.NewFilteredAdapter("examples/rbac_with_domains_policy.csv")
enforcer.InitWithAdapter("examples/rbac_with_domains_model.conf", adapter)
filter := &fileadapter.Filter{
P: []string{"", "domain1"},
G: []string{"", "", "domain1"},
}
enforcer.LoadFilteredPolicy(filter)
// The loaded policy now only contains the entries pertaining to "domain1".
```
## Policy consistence between multiple nodes
We support to use distributed messaging systems like [etcd](https://github.com/coreos/etcd) to keep consistence between multiple Casbin enforcer instances. So our users can concurrently use multiple Casbin enforcers to handle large number of permission checking requests.
Similar to policy storage adapters, we don't put watcher code in the main library. Any support for a new messaging system should be implemented as a watcher. A complete list of Casbin watchers is provided as below. Any 3rd-party contribution on a new watcher is welcomed, please inform us and I will put it in this list:)
Watcher | Type | Author | Description
----|------|----|----
[Etcd Watcher](https://github.com/casbin/etcd-watcher) | KV store | Casbin | Watcher for [etcd](https://github.com/coreos/etcd)
[NATS Watcher](https://github.com/Soluto/casbin-nats-watcher) | Messaging system | [Soluto](https://github.com/Soluto) | Watcher for [NATS](https://nats.io/)
[ZooKeeper Watcher](https://github.com/grepsr/casbin-zk-watcher) | KV store | [Grepsr](https://github.com/grepsr) | Watcher for [Apache ZooKeeper](https://zookeeper.apache.org/)
[Redis Watcher](https://github.com/billcobbler/casbin-redis-watcher) | KV store | [@billcobbler](https://github.com/billcobbler) | Watcher for [Redis](http://redis.io/)
## Role manager
The role manager is used to manage the RBAC role hierarchy (user-role mapping) in Casbin. A role manager can retrieve the role data from Casbin policy rules or external sources such as LDAP, Okta, Auth0, Azure AD, etc. We support different implementations of a role manager. To keep light-weight, we don't put role manager code in the main library (except the default role manager). A complete list of Casbin role managers is provided as below. Any 3rd-party contribution on a new role manager is welcomed, please inform us and I will put it in this list:)
Role manager | Author | Description
----|----|----
[Default Role Manager (built-in)](https://github.com/casbin/casbin/blob/master/rbac/default-role-manager/role_manager.go) | Casbin | Supports role hierarchy stored in Casbin policy
[Session Role Manager](https://github.com/casbin/session-role-manager) | [EDOMO Systems](https://github.com/edomosystems) | Supports role hierarchy stored in Casbin policy, with time-range-based sessions
[Okta Role Manager](https://github.com/casbin/okta-role-manager) | Casbin | Supports role hierarchy stored in [Okta](https://www.okta.com/)
[Auth0 Role Manager](https://github.com/casbin/auth0-role-manager) | Casbin | Supports role hierarchy stored in [Auth0](https://auth0.com/)'s [Authorization Extension](https://auth0.com/docs/extensions/authorization-extension/v2)
For developers: all role managers must implement the [RoleManager](https://github.com/casbin/casbin/blob/master/rbac/role_manager.go) interface. [Session Role Manager](https://github.com/casbin/session-role-manager) can be used as a reference implementation.
## Multi-threading
If you use Casbin in a multi-threading manner, you can use the synchronized wrapper of the Casbin enforcer: https://github.com/casbin/casbin/blob/master/enforcer_synced.go.
It also supports the ``AutoLoad`` feature, which means the Casbin enforcer will automatically load the latest policy rules from DB if it has changed. Call ``StartAutoLoadPolicy()`` to start automatically loading policy periodically and call ``StopAutoLoadPolicy()`` to stop it.
## Benchmarks
The overhead of policy enforcement is benchmarked in [model_b_test.go](https://github.com/casbin/casbin/blob/master/model_b_test.go). The testbed is:
```
Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz, 2601 Mhz, 4 Core(s), 8 Logical Processor(s)
```
The benchmarking result of ``go test -bench=. -benchmem`` is as follows (op = an ``Enforce()`` call, ms = millisecond, KB = kilo bytes):
Test case | Size | Time overhead | Memory overhead
----|------|------|----
ACL | 2 rules (2 users) | 0.015493 ms/op | 5.649 KB
RBAC | 5 rules (2 users, 1 role) | 0.021738 ms/op | 7.522 KB
RBAC (small) | 1100 rules (1000 users, 100 roles) | 0.164309 ms/op | 80.620 KB
RBAC (medium) | 11000 rules (10000 users, 1000 roles) | 2.258262 ms/op | 765.152 KB
RBAC (large) | 110000 rules (100000 users, 10000 roles) | 23.916776 ms/op | 7.606 MB
RBAC with resource roles | 6 rules (2 users, 2 roles) | 0.021146 ms/op | 7.906 KB
RBAC with domains/tenants | 6 rules (2 users, 1 role, 2 domains) | 0.032696 ms/op | 10.755 KB
ABAC | 0 rule (0 user) | 0.007510 ms/op | 2.328 KB
RESTful | 5 rules (3 users) | 0.045398 ms/op | 91.774 KB
Deny-override | 6 rules (2 users, 1 role) | 0.023281 ms/op | 8.370 KB
Priority | 9 rules (2 users, 2 roles) | 0.016389 ms/op | 5.313 KB
## Examples
Model | Model file | Policy file
----|------|----
ACL | [basic_model.conf](https://github.com/casbin/casbin/blob/master/examples/basic_model.conf) | [basic_policy.csv](https://github.com/casbin/casbin/blob/master/examples/basic_policy.csv)
ACL with superuser | [basic_model_with_root.conf](https://github.com/casbin/casbin/blob/master/examples/basic_with_root_model.conf) | [basic_policy.csv](https://github.com/casbin/casbin/blob/master/examples/basic_policy.csv)
ACL without users | [basic_model_without_users.conf](https://github.com/casbin/casbin/blob/master/examples/basic_without_users_model.conf) | [basic_policy_without_users.csv](https://github.com/casbin/casbin/blob/master/examples/basic_without_users_policy.csv)
ACL without resources | [basic_model_without_resources.conf](https://github.com/casbin/casbin/blob/master/examples/basic_without_resources_model.conf) | [basic_policy_without_resources.csv](https://github.com/casbin/casbin/blob/master/examples/basic_without_resources_policy.csv)
RBAC | [rbac_model.conf](https://github.com/casbin/casbin/blob/master/examples/rbac_model.conf) | [rbac_policy.csv](https://github.com/casbin/casbin/blob/master/examples/rbac_policy.csv)
RBAC with resource roles | [rbac_model_with_resource_roles.conf](https://github.com/casbin/casbin/blob/master/examples/rbac_with_resource_roles_model.conf) | [rbac_policy_with_resource_roles.csv](https://github.com/casbin/casbin/blob/master/examples/rbac_with_resource_roles_policy.csv)
RBAC with domains/tenants | [rbac_model_with_domains.conf](https://github.com/casbin/casbin/blob/master/examples/rbac_with_domains_model.conf) | [rbac_policy_with_domains.csv](https://github.com/casbin/casbin/blob/master/examples/rbac_with_domains_policy.csv)
ABAC | [abac_model.conf](https://github.com/casbin/casbin/blob/master/examples/abac_model.conf) | N/A
RESTful | [keymatch_model.conf](https://github.com/casbin/casbin/blob/master/examples/keymatch_model.conf) | [keymatch_policy.csv](https://github.com/casbin/casbin/blob/master/examples/keymatch_policy.csv)
Deny-override | [rbac_model_with_deny.conf](https://github.com/casbin/casbin/blob/master/examples/rbac_with_deny_model.conf) | [rbac_policy_with_deny.csv](https://github.com/casbin/casbin/blob/master/examples/rbac_with_deny_policy.csv)
Priority | [priority_model.conf](https://github.com/casbin/casbin/blob/master/examples/priority_model.conf) | [priority_policy.csv](https://github.com/casbin/casbin/blob/master/examples/priority_policy.csv)
## How to use Casbin as a service?
- [Go-Simple-API-Gateway](https://github.com/Soontao/go-simple-api-gateway): A simple API gateway written by golang, supports for authentication and authorization
- [Casbin Server](https://github.com/casbin/casbin-server): Casbin as a Service via RESTful, only exposed permission checking API
- [middleware-acl](https://github.com/luk4z7/middleware-acl): RESTful access control middleware based on Casbin
## Our adopters
### Web frameworks
- [Beego](https://github.com/astaxie/beego): An open-source, high-performance web framework for Go, via built-in plugin: [plugins/authz](https://github.com/astaxie/beego/blob/master/plugins/authz)
- [Caddy](https://github.com/mholt/caddy): Fast, cross-platform HTTP/2 web server with automatic HTTPS, via plugin: [caddy-authz](https://github.com/casbin/caddy-authz)
- [Gin](https://github.com/gin-gonic/gin): A HTTP web framework featuring a Martini-like API with much better performance, via plugin: [authz](https://github.com/gin-contrib/authz)
- [Revel](https://github.com/revel/revel): A high productivity, full-stack web framework for the Go language, via plugin: [auth/casbin](https://github.com/revel/modules/tree/master/auth/casbin)
- [Echo](https://github.com/labstack/echo): High performance, minimalist Go web framework, via plugin: [echo-authz](https://github.com/labstack/echo-contrib/tree/master/casbin) (thanks to [@xqbumu](https://github.com/xqbumu))
- [Iris](https://github.com/kataras/iris): The fastest web framework for Go in (THIS) Earth. HTTP/2 Ready-To-GO, via plugin: [casbin](https://github.com/iris-contrib/middleware/tree/master/casbin) (thanks to [@hiveminded](https://github.com/hiveminded))
- [Negroni](https://github.com/urfave/negroni): Idiomatic HTTP Middleware for Golang, via plugin: [negroni-authz](https://github.com/casbin/negroni-authz)
- [Tango](https://github.com/lunny/tango): Micro & pluggable web framework for Go, via plugin: [authz](https://github.com/tango-contrib/authz)
- [Chi](https://github.com/pressly/chi): A lightweight, idiomatic and composable router for building HTTP services, via plugin: [chi-authz](https://github.com/casbin/chi-authz)
- [Macaron](https://github.com/go-macaron/macaron): A high productive and modular web framework in Go, via plugin: [authz](https://github.com/go-macaron/authz)
- [DotWeb](https://github.com/devfeel/dotweb): Simple and easy go web micro framework, via plugin: [authz](https://github.com/devfeel/middleware/tree/master/authz)
- [Baa](https://github.com/go-baa/baa): An express Go web framework with routing, middleware, dependency injection and http context, via plugin: [authz](https://github.com/baa-middleware/authz)
### Others
- [Intel RMD](https://github.com/intel/rmd): Intel's resource management daemon, via direct integration, see: [model](https://github.com/intel/rmd/blob/master/etc/rmd/acl/url/model.conf), [policy rules](https://github.com/intel/rmd/blob/master/etc/rmd/acl/url/policy.csv)
- [VMware Dispatch](https://github.com/vmware/dispatch): A framework for deploying and managing serverless style applications, via direct integration, see: [model (in code)](https://github.com/vmware/dispatch/blob/master/pkg/identity-manager/handlers.go#L46-L55), [policy rules (in code)](https://github.com/vmware/dispatch/blob/master/pkg/identity-manager/handlers_test.go#L35-L45)
- [Banzai Pipeline](https://github.com/banzaicloud/pipeline): [Banzai Cloud](https://github.com/banzaicloud)'s RESTful API to provision or reuse managed Kubernetes clusters in the cloud, via direct integration, see: [model (in code)](https://github.com/banzaicloud/pipeline/blob/master/auth/authz.go#L15-L30), [policy rules (in code)](https://github.com/banzaicloud/pipeline/blob/master/auth/authz.go#L84-L93)
- [Docker](https://github.com/docker/docker): The world's leading software container platform, via plugin: [casbin-authz-plugin](https://github.com/casbin/casbin-authz-plugin) ([recommended by Docker](https://docs.docker.com/engine/extend/legacy_plugins/#authorization-plugins))
- [Gobis](https://github.com/orange-cloudfoundry/gobis): [Orange](https://github.com/orange-cloudfoundry)'s lightweight API Gateway written in go, via plugin: [casbin](https://github.com/orange-cloudfoundry/gobis-middlewares/tree/master/casbin), see [model (in code)](https://github.com/orange-cloudfoundry/gobis-middlewares/blob/master/casbin/model.go#L52-L65), [policy rules (from request)](https://github.com/orange-cloudfoundry/gobis-middlewares/blob/master/casbin/adapter.go#L46-L64)
- [Skydive](https://github.com/skydive-project/skydive): An open source real-time network topology and protocols analyzer, via direct integration, see: [model (in code)](https://github.com/skydive-project/skydive/blob/master/config/config.go#L136-L140), [policy rules](https://github.com/skydive-project/skydive/blob/master/rbac/policy.csv)
- [Zenpress](https://github.com/insionng/zenpress): A CMS system written in Golang, via direct integration, see: [model](https://github.com/insionng/zenpress/blob/master/content/config/rbac_model.conf), [policy rules (in Gorm)](https://github.com/insionng/zenpress/blob/master/model/user.go#L53-L77)
- [Argo CD](https://github.com/argoproj/argo-cd): GitOps continuous delivery for Kubernetes, via direct integration, see: [model](https://github.com/argoproj/argo-cd/blob/master/util/rbac/model.conf), [policy rules](https://github.com/argoproj/argo-cd/blob/master/util/rbac/builtin-policy.csv)
- [EngineerCMS](https://github.com/3xxx/EngineerCMS): A CMS to manage knowledge for engineers, via direct integration, see: [model](https://github.com/3xxx/EngineerCMS/blob/master/conf/rbac_model.conf), [policy rules (in SQLite)](https://github.com/3xxx/EngineerCMS/blob/master/database/engineer.db)
- [Cyber Auth API](https://github.com/CyberlifeCN/cyber-auth-api): A Golang authentication API project, via direct integration, see: [model](https://github.com/CyberlifeCN/cyber-auth-api/blob/master/conf/authz_model.conf), [policy rules](https://github.com/CyberlifeCN/cyber-auth-api/blob/master/conf/authz_policy.csv)
- [IRIS Community](https://github.com/irisnet/iris-community): Website for IRIS Community Activities, via direct integration, see: [model](https://github.com/irisnet/iris-community/blob/master/authz/authz_model.conf), [policy rules](https://github.com/irisnet/iris-community/blob/master/authz/authz_policy.csv)
- [Metadata DB](https://github.com/Bnei-Baruch/mdb): BB archive metadata database, via direct integration, see: [model](https://github.com/Bnei-Baruch/mdb/blob/master/data/permissions_model.conf), [policy rules](https://github.com/Bnei-Baruch/mdb/blob/master/data/permissions_policy.csv)
## License
This project is licensed under the [Apache 2.0 license](https://github.com/casbin/casbin/blob/master/LICENSE).
## Contact
If you have any issues or feature requests, please contact us. PR is welcomed.
- https://github.com/casbin/casbin/issues
- hsluoyz@gmail.com
- Tencent QQ group: [546057381](//shang.qq.com/wpa/qunwpa?idkey=8ac8b91fc97ace3d383d0035f7aa06f7d670fd8e8d4837347354a31c18fac885)
## Donation
[![Patreon](https://hsluoyz.github.io/donation/patreon.png)](http://www.patreon.com/yangluo)
![Alipay](https://hsluoyz.github.io/donation/donate_alipay.png)
![Wechat](https://hsluoyz.github.io/donation/donate_weixin.png)

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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"os"
"strconv"
"strings"
"sync"
)
var (
// DEFAULT_SECTION specifies the name of a section if no name provided
DEFAULT_SECTION = "default"
// DEFAULT_COMMENT defines what character(s) indicate a comment `#`
DEFAULT_COMMENT = []byte{'#'}
// DEFAULT_COMMENT_SEM defines what alternate character(s) indicate a comment `;`
DEFAULT_COMMENT_SEM = []byte{';'}
// DEFAULT_MULTI_LINE_SEPARATOR defines what character indicates a multi-line content
DEFAULT_MULTI_LINE_SEPARATOR = []byte{'\\'}
)
// ConfigInterface defines the behavior of a Config implemenation
type ConfigInterface interface {
String(key string) string
Strings(key string) []string
Bool(key string) (bool, error)
Int(key string) (int, error)
Int64(key string) (int64, error)
Float64(key string) (float64, error)
Set(key string, value string) error
}
// Config represents an implementation of the ConfigInterface
type Config struct {
// map is not safe.
sync.RWMutex
// Section:key=value
data map[string]map[string]string
}
// NewConfig create an empty configuration representation from file.
func NewConfig(confName string) (ConfigInterface, error) {
c := &Config{
data: make(map[string]map[string]string),
}
err := c.parse(confName)
return c, err
}
// NewConfigFromText create an empty configuration representation from text.
func NewConfigFromText(text string) (ConfigInterface, error) {
c := &Config{
data: make(map[string]map[string]string),
}
err := c.parseBuffer(bufio.NewReader(strings.NewReader(text)))
return c, err
}
// AddConfig adds a new section->key:value to the configuration.
func (c *Config) AddConfig(section string, option string, value string) bool {
if section == "" {
section = DEFAULT_SECTION
}
if _, ok := c.data[section]; !ok {
c.data[section] = make(map[string]string)
}
_, ok := c.data[section][option]
c.data[section][option] = value
return !ok
}
func (c *Config) parse(fname string) (err error) {
c.Lock()
f, err := os.Open(fname)
if err != nil {
return err
}
defer c.Unlock()
defer f.Close()
buf := bufio.NewReader(f)
return c.parseBuffer(buf)
}
func (c *Config) parseBuffer(buf *bufio.Reader) error {
var section string
var lineNum int
var buffer bytes.Buffer
var canWrite bool
for {
if canWrite {
if err := c.write(section, lineNum, &buffer); err != nil {
return err
} else {
canWrite = false
}
}
lineNum++
line, _, err := buf.ReadLine()
if err == io.EOF {
// force write when buffer is not flushed yet
if buffer.Len() > 0 {
if err := c.write(section, lineNum, &buffer); err != nil {
return err
}
}
break
} else if err != nil {
return err
}
line = bytes.TrimSpace(line)
switch {
case bytes.Equal(line, []byte{}), bytes.HasPrefix(line, DEFAULT_COMMENT_SEM),
bytes.HasPrefix(line, DEFAULT_COMMENT):
canWrite = true
continue
case bytes.HasPrefix(line, []byte{'['}) && bytes.HasSuffix(line, []byte{']'}):
// force write when buffer is not flushed yet
if buffer.Len() > 0 {
if err := c.write(section, lineNum, &buffer); err != nil {
return err
}
canWrite = false
}
section = string(line[1 : len(line)-1])
default:
var p []byte
if bytes.HasSuffix(line, DEFAULT_MULTI_LINE_SEPARATOR) {
p = bytes.TrimSpace(line[:len(line)-1])
} else {
p = line
canWrite = true
}
if _, err := buffer.Write(p); err != nil {
return err
}
}
}
return nil
}
func (c *Config) write(section string, lineNum int, b *bytes.Buffer) error {
if b.Len() <= 0 {
return nil
}
optionVal := bytes.SplitN(b.Bytes(), []byte{'='}, 2)
if len(optionVal) != 2 {
return fmt.Errorf("parse the content error : line %d , %s = ? ", lineNum, optionVal[0])
}
option := bytes.TrimSpace(optionVal[0])
value := bytes.TrimSpace(optionVal[1])
c.AddConfig(section, string(option), string(value))
// flush buffer after adding
b.Reset()
return nil
}
// Bool lookups up the value using the provided key and converts the value to a bool
func (c *Config) Bool(key string) (bool, error) {
return strconv.ParseBool(c.get(key))
}
// Int lookups up the value using the provided key and converts the value to a int
func (c *Config) Int(key string) (int, error) {
return strconv.Atoi(c.get(key))
}
// Int64 lookups up the value using the provided key and converts the value to a int64
func (c *Config) Int64(key string) (int64, error) {
return strconv.ParseInt(c.get(key), 10, 64)
}
// Float64 lookups up the value using the provided key and converts the value to a float64
func (c *Config) Float64(key string) (float64, error) {
return strconv.ParseFloat(c.get(key), 64)
}
// String lookups up the value using the provided key and converts the value to a string
func (c *Config) String(key string) string {
return c.get(key)
}
// Strings lookups up the value using the provided key and converts the value to an array of string
// by splitting the string by comma
func (c *Config) Strings(key string) []string {
v := c.get(key)
if v == "" {
return nil
}
return strings.Split(v, ",")
}
// Set sets the value for the specific key in the Config
func (c *Config) Set(key string, value string) error {
c.Lock()
defer c.Unlock()
if len(key) == 0 {
return errors.New("key is empty")
}
var (
section string
option string
)
keys := strings.Split(strings.ToLower(key), "::")
if len(keys) >= 2 {
section = keys[0]
option = keys[1]
} else {
option = keys[0]
}
c.AddConfig(section, option, value)
return nil
}
// section.key or key
func (c *Config) get(key string) string {
var (
section string
option string
)
keys := strings.Split(strings.ToLower(key), "::")
if len(keys) >= 2 {
section = keys[0]
option = keys[1]
} else {
section = DEFAULT_SECTION
option = keys[0]
}
if value, ok := c.data[section][option]; ok {
return value
}
return ""
}

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// Copyright 2018 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package effect
import "github.com/pkg/errors"
// DefaultEffector is default effector for Casbin.
type DefaultEffector struct {
}
// NewDefaultEffector is the constructor for DefaultEffector.
func NewDefaultEffector() *DefaultEffector {
e := DefaultEffector{}
return &e
}
// MergeEffects merges all matching results collected by the enforcer into a single decision.
func (e *DefaultEffector) MergeEffects(expr string, effects []Effect, results []float64) (bool, error) {
result := false
if expr == "some(where (p_eft == allow))" {
result = false
for _, eft := range effects {
if eft == Allow {
result = true
break
}
}
} else if expr == "!some(where (p_eft == deny))" {
result = true
for _, eft := range effects {
if eft == Deny {
result = false
break
}
}
} else if expr == "some(where (p_eft == allow)) && !some(where (p_eft == deny))" {
result = false
for _, eft := range effects {
if eft == Allow {
result = true
} else if eft == Deny {
result = false
break
}
}
} else if expr == "priority(p_eft) || deny" {
result = false
for _, eft := range effects {
if eft != Indeterminate {
if eft == Allow {
result = true
} else {
result = false
}
break
}
}
} else {
return false, errors.New("unsupported effect")
}
return result, nil
}

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// Copyright 2018 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package effect
// Effect is the result for a policy rule.
type Effect int
// Values for policy effect.
const (
Allow Effect = iota
Indeterminate
Deny
)
// Effector is the interface for Casbin effectors.
type Effector interface {
// MergeEffects merges all matching results collected by the enforcer into a single decision.
MergeEffects(expr string, effects []Effect, results []float64) (bool, error)
}

425
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
import (
"errors"
"fmt"
"github.com/Knetic/govaluate"
"github.com/casbin/casbin/effect"
"github.com/casbin/casbin/model"
"github.com/casbin/casbin/persist"
"github.com/casbin/casbin/persist/file-adapter"
"github.com/casbin/casbin/rbac"
"github.com/casbin/casbin/rbac/default-role-manager"
"github.com/casbin/casbin/util"
)
// Enforcer is the main interface for authorization enforcement and policy management.
type Enforcer struct {
modelPath string
model model.Model
fm model.FunctionMap
eft effect.Effector
adapter persist.Adapter
watcher persist.Watcher
rm rbac.RoleManager
enabled bool
autoSave bool
autoBuildRoleLinks bool
}
// NewEnforcer creates an enforcer via file or DB.
// File:
// e := casbin.NewEnforcer("path/to/basic_model.conf", "path/to/basic_policy.csv")
// MySQL DB:
// a := mysqladapter.NewDBAdapter("mysql", "mysql_username:mysql_password@tcp(127.0.0.1:3306)/")
// e := casbin.NewEnforcer("path/to/basic_model.conf", a)
func NewEnforcer(params ...interface{}) *Enforcer {
e := &Enforcer{}
e.rm = defaultrolemanager.NewRoleManager(10)
e.eft = effect.NewDefaultEffector()
parsedParamLen := 0
if len(params) >= 1 {
enableLog, ok := params[len(params)-1].(bool)
if ok {
e.EnableLog(enableLog)
parsedParamLen++
}
}
if len(params)-parsedParamLen == 2 {
switch params[0].(type) {
case string:
switch params[1].(type) {
case string:
e.InitWithFile(params[0].(string), params[1].(string))
default:
e.InitWithAdapter(params[0].(string), params[1].(persist.Adapter))
}
default:
switch params[1].(type) {
case string:
panic("Invalid parameters for enforcer.")
default:
e.InitWithModelAndAdapter(params[0].(model.Model), params[1].(persist.Adapter))
}
}
} else if len(params)-parsedParamLen == 1 {
switch params[0].(type) {
case string:
e.InitWithFile(params[0].(string), "")
default:
e.InitWithModelAndAdapter(params[0].(model.Model), nil)
}
} else if len(params)-parsedParamLen == 0 {
e.InitWithFile("", "")
} else {
panic("Invalid parameters for enforcer.")
}
return e
}
// InitWithFile initializes an enforcer with a model file and a policy file.
func (e *Enforcer) InitWithFile(modelPath string, policyPath string) {
a := fileadapter.NewAdapter(policyPath)
e.InitWithAdapter(modelPath, a)
}
// InitWithAdapter initializes an enforcer with a database adapter.
func (e *Enforcer) InitWithAdapter(modelPath string, adapter persist.Adapter) {
m := NewModel(modelPath, "")
e.InitWithModelAndAdapter(m, adapter)
e.modelPath = modelPath
}
// InitWithModelAndAdapter initializes an enforcer with a model and a database adapter.
func (e *Enforcer) InitWithModelAndAdapter(m model.Model, adapter persist.Adapter) {
e.adapter = adapter
e.watcher = nil
e.model = m
e.model.PrintModel()
e.fm = model.LoadFunctionMap()
e.initialize()
if e.adapter != nil {
// error intentionally ignored
e.LoadPolicy()
}
}
func (e *Enforcer) initialize() {
e.enabled = true
e.autoSave = true
e.autoBuildRoleLinks = true
}
// NewModel creates a model.
func NewModel(text ...string) model.Model {
m := make(model.Model)
if len(text) == 2 {
if text[0] != "" {
m.LoadModel(text[0])
}
} else if len(text) == 1 {
m.LoadModelFromText(text[0])
} else if len(text) != 0 {
panic("Invalid parameters for model.")
}
return m
}
// LoadModel reloads the model from the model CONF file.
// Because the policy is attached to a model, so the policy is invalidated and needs to be reloaded by calling LoadPolicy().
func (e *Enforcer) LoadModel() {
e.model = NewModel()
e.model.LoadModel(e.modelPath)
e.model.PrintModel()
e.fm = model.LoadFunctionMap()
}
// GetModel gets the current model.
func (e *Enforcer) GetModel() model.Model {
return e.model
}
// SetModel sets the current model.
func (e *Enforcer) SetModel(m model.Model) {
e.model = m
e.fm = model.LoadFunctionMap()
}
// GetAdapter gets the current adapter.
func (e *Enforcer) GetAdapter() persist.Adapter {
return e.adapter
}
// SetAdapter sets the current adapter.
func (e *Enforcer) SetAdapter(adapter persist.Adapter) {
e.adapter = adapter
}
// SetWatcher sets the current watcher.
func (e *Enforcer) SetWatcher(watcher persist.Watcher) {
e.watcher = watcher
// error intentionally ignored
watcher.SetUpdateCallback(func(string) { e.LoadPolicy() })
}
// SetRoleManager sets the current role manager.
func (e *Enforcer) SetRoleManager(rm rbac.RoleManager) {
e.rm = rm
}
// SetEffector sets the current effector.
func (e *Enforcer) SetEffector(eft effect.Effector) {
e.eft = eft
}
// ClearPolicy clears all policy.
func (e *Enforcer) ClearPolicy() {
e.model.ClearPolicy()
}
// LoadPolicy reloads the policy from file/database.
func (e *Enforcer) LoadPolicy() error {
e.model.ClearPolicy()
if err := e.adapter.LoadPolicy(e.model); err != nil {
return err
}
e.model.PrintPolicy()
if e.autoBuildRoleLinks {
e.BuildRoleLinks()
}
return nil
}
// LoadFilteredPolicy reloads a filtered policy from file/database.
func (e *Enforcer) LoadFilteredPolicy(filter interface{}) error {
e.model.ClearPolicy()
var filteredAdapter persist.FilteredAdapter
// Attempt to cast the Adapter as a FilteredAdapter
switch e.adapter.(type) {
case persist.FilteredAdapter:
filteredAdapter = e.adapter.(persist.FilteredAdapter)
default:
return errors.New("filtered policies are not supported by this adapter")
}
if err := filteredAdapter.LoadFilteredPolicy(e.model, filter); err != nil {
return err
}
e.model.PrintPolicy()
if e.autoBuildRoleLinks {
e.BuildRoleLinks()
}
return nil
}
// IsFiltered returns true if the loaded policy has been filtered.
func (e *Enforcer) IsFiltered() bool {
filteredAdapter, ok := e.adapter.(persist.FilteredAdapter)
if !ok {
return false
}
return filteredAdapter.IsFiltered()
}
// SavePolicy saves the current policy (usually after changed with Casbin API) back to file/database.
func (e *Enforcer) SavePolicy() error {
if e.IsFiltered() {
return errors.New("cannot save a filtered policy")
}
if err := e.adapter.SavePolicy(e.model); err != nil {
return err
}
if e.watcher != nil {
return e.watcher.Update()
}
return nil
}
// EnableEnforce changes the enforcing state of Casbin, when Casbin is disabled, all access will be allowed by the Enforce() function.
func (e *Enforcer) EnableEnforce(enable bool) {
e.enabled = enable
}
// EnableLog changes whether to print Casbin log to the standard output.
func (e *Enforcer) EnableLog(enable bool) {
util.EnableLog = enable
}
// EnableAutoSave controls whether to save a policy rule automatically to the adapter when it is added or removed.
func (e *Enforcer) EnableAutoSave(autoSave bool) {
e.autoSave = autoSave
}
// EnableAutoBuildRoleLinks controls whether to rebuild the role inheritance relations when a role is added or deleted.
func (e *Enforcer) EnableAutoBuildRoleLinks(autoBuildRoleLinks bool) {
e.autoBuildRoleLinks = autoBuildRoleLinks
}
// BuildRoleLinks manually rebuild the role inheritance relations.
func (e *Enforcer) BuildRoleLinks() {
// error intentionally ignored
e.rm.Clear()
e.model.BuildRoleLinks(e.rm)
}
// Enforce decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (sub, obj, act).
func (e *Enforcer) Enforce(rvals ...interface{}) bool {
if !e.enabled {
return true
}
functions := make(map[string]govaluate.ExpressionFunction)
for key, function := range e.fm {
functions[key] = function
}
if _, ok := e.model["g"]; ok {
for key, ast := range e.model["g"] {
rm := ast.RM
functions[key] = util.GenerateGFunction(rm)
}
}
expString := e.model["m"]["m"].Value
expression, _ := govaluate.NewEvaluableExpressionWithFunctions(expString, functions)
var policyEffects []effect.Effect
var matcherResults []float64
if policyLen := len(e.model["p"]["p"].Policy); policyLen != 0 {
policyEffects = make([]effect.Effect, policyLen)
matcherResults = make([]float64, policyLen)
for i, pvals := range e.model["p"]["p"].Policy {
// util.LogPrint("Policy Rule: ", pvals)
parameters := make(map[string]interface{}, 8)
for j, token := range e.model["r"]["r"].Tokens {
parameters[token] = rvals[j]
}
for j, token := range e.model["p"]["p"].Tokens {
parameters[token] = pvals[j]
}
result, err := expression.Evaluate(parameters)
// util.LogPrint("Result: ", result)
if err != nil {
policyEffects[i] = effect.Indeterminate
panic(err)
}
switch result.(type) {
case bool:
if !result.(bool) {
policyEffects[i] = effect.Indeterminate
continue
}
case float64:
if result.(float64) == 0 {
policyEffects[i] = effect.Indeterminate
continue
} else {
matcherResults[i] = result.(float64)
}
default:
panic(errors.New("matcher result should be bool, int or float"))
}
if eft, ok := parameters["p_eft"]; ok {
if eft == "allow" {
policyEffects[i] = effect.Allow
} else if eft == "deny" {
policyEffects[i] = effect.Deny
} else {
policyEffects[i] = effect.Indeterminate
}
} else {
policyEffects[i] = effect.Allow
}
if e.model["e"]["e"].Value == "priority(p_eft) || deny" {
break
}
}
} else {
policyEffects = make([]effect.Effect, 1)
matcherResults = make([]float64, 1)
parameters := make(map[string]interface{}, 8)
for j, token := range e.model["r"]["r"].Tokens {
parameters[token] = rvals[j]
}
for _, token := range e.model["p"]["p"].Tokens {
parameters[token] = ""
}
result, err := expression.Evaluate(parameters)
// util.LogPrint("Result: ", result)
if err != nil {
policyEffects[0] = effect.Indeterminate
panic(err)
}
if result.(bool) {
policyEffects[0] = effect.Allow
} else {
policyEffects[0] = effect.Indeterminate
}
}
// util.LogPrint("Rule Results: ", policyEffects)
result, err := e.eft.MergeEffects(e.model["e"]["e"].Value, policyEffects, matcherResults)
if err != nil {
panic(err)
}
// only generate the request --> result string if the message
// is going to be logged.
if util.EnableLog {
reqStr := "Request: "
for i, rval := range rvals {
if i != len(rvals)-1 {
reqStr += fmt.Sprintf("%v, ", rval)
} else {
reqStr += fmt.Sprintf("%v", rval)
}
}
reqStr += fmt.Sprintf(" ---> %t", result)
util.LogPrint(reqStr)
}
return result
}

74
vendor/github.com/casbin/casbin/enforcer_cached.go generated vendored Normal file
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// Copyright 2018 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
import (
"sync"
)
// CachedEnforcer wraps Enforcer and provides decision cache
type CachedEnforcer struct {
*Enforcer
m map[string]bool
enableCache bool
locker *sync.Mutex
}
// NewCachedEnforcer creates a cached enforcer via file or DB.
func NewCachedEnforcer(params ...interface{}) *CachedEnforcer {
e := &CachedEnforcer{}
e.Enforcer = NewEnforcer(params...)
e.enableCache = true
e.m = make(map[string]bool)
e.locker = new(sync.Mutex)
return e
}
// EnableCache determines whether to enable cache on Enforce(). When enableCache is enabled, cached result (true | false) will be returned for previous decisions.
func (e *CachedEnforcer) EnableCache(enableCache bool) {
e.enableCache = enableCache
}
// Enforce decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (sub, obj, act).
// if rvals is not string , ingore the cache
func (e *CachedEnforcer) Enforce(rvals ...interface{}) bool {
if !e.enableCache {
return e.Enforcer.Enforce(rvals...)
}
key := ""
for _, rval := range rvals {
if val, ok := rval.(string); ok {
key += val + "$$"
} else {
return e.Enforcer.Enforce(rvals...)
}
}
e.locker.Lock()
defer e.locker.Unlock()
if _, ok := e.m[key]; ok {
return e.m[key]
} else {
res := e.Enforcer.Enforce(rvals...)
e.m[key] = res
return res
}
}
// InvalidateCache deletes all the existing cached decisions.
func (e *CachedEnforcer) InvalidateCache() {
e.m = make(map[string]bool)
}

102
vendor/github.com/casbin/casbin/enforcer_safe.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
import (
"fmt"
)
// NewEnforcerSafe calls NewEnforcer in a safe way, returns error instead of causing panic.
func NewEnforcerSafe(params ...interface{}) (e *Enforcer, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
e = nil
}
}()
e = NewEnforcer(params...)
err = nil
return
}
// LoadModelSafe calls LoadModel in a safe way, returns error instead of causing panic.
func (e *Enforcer) LoadModelSafe() (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
}
}()
e.LoadModel()
err = nil
return
}
// EnforceSafe calls Enforce in a safe way, returns error instead of causing panic.
func (e *Enforcer) EnforceSafe(rvals ...interface{}) (result bool, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
result = false
}
}()
result = e.Enforce(rvals...)
err = nil
return
}
// AddPolicySafe calls AddPolicy in a safe way, returns error instead of causing panic.
func (e *Enforcer) AddPolicySafe(params ...interface{}) (result bool, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
result = false
}
}()
result = e.AddNamedPolicy("p", params...)
err = nil
return
}
// RemovePolicySafe calls RemovePolicy in a safe way, returns error instead of causing panic.
func (e *Enforcer) RemovePolicySafe(params ...interface{}) (result bool, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
result = false
}
}()
result = e.RemoveNamedPolicy("p", params...)
err = nil
return
}
// RemoveFilteredPolicySafe calls RemoveFilteredPolicy in a safe way, returns error instead of causing panic.
func (e *Enforcer) RemoveFilteredPolicySafe(fieldIndex int, fieldValues ...string) (result bool, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%v", r)
result = false
}
}()
result = e.RemoveFilteredNamedPolicy("p", fieldIndex, fieldValues...)
err = nil
return
}

223
vendor/github.com/casbin/casbin/enforcer_synced.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
import (
"log"
"sync"
"time"
"github.com/casbin/casbin/persist"
)
// SyncedEnforcer wraps Enforcer and provides synchronized access
type SyncedEnforcer struct {
*Enforcer
m sync.RWMutex
autoLoad bool
}
// NewSyncedEnforcer creates a synchronized enforcer via file or DB.
func NewSyncedEnforcer(params ...interface{}) *SyncedEnforcer {
e := &SyncedEnforcer{}
e.Enforcer = NewEnforcer(params...)
e.autoLoad = false
return e
}
// StartAutoLoadPolicy starts a go routine that will every specified duration call LoadPolicy
func (e *SyncedEnforcer) StartAutoLoadPolicy(d time.Duration) {
e.autoLoad = true
go func() {
n := 1
log.Print("Start automatically load policy")
for {
if !e.autoLoad {
log.Print("Stop automatically load policy")
break
}
// error intentionally ignored
e.LoadPolicy()
// Uncomment this line to see when the policy is loaded.
// log.Print("Load policy for time: ", n)
n++
time.Sleep(d)
}
}()
}
// StopAutoLoadPolicy causes the go routine to exit.
func (e *SyncedEnforcer) StopAutoLoadPolicy() {
e.autoLoad = false
}
// SetWatcher sets the current watcher.
func (e *SyncedEnforcer) SetWatcher(watcher persist.Watcher) {
e.watcher = watcher
// error intentionally ignored
watcher.SetUpdateCallback(func(string) { e.LoadPolicy() })
}
// ClearPolicy clears all policy.
func (e *SyncedEnforcer) ClearPolicy() {
e.m.Lock()
defer e.m.Unlock()
e.Enforcer.ClearPolicy()
}
// LoadPolicy reloads the policy from file/database.
func (e *SyncedEnforcer) LoadPolicy() error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.LoadPolicy()
}
// SavePolicy saves the current policy (usually after changed with Casbin API) back to file/database.
func (e *SyncedEnforcer) SavePolicy() error {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.SavePolicy()
}
// BuildRoleLinks manually rebuild the role inheritance relations.
func (e *SyncedEnforcer) BuildRoleLinks() {
e.m.RLock()
defer e.m.RUnlock()
e.Enforcer.BuildRoleLinks()
}
// Enforce decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (sub, obj, act).
func (e *SyncedEnforcer) Enforce(rvals ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.Enforce(rvals...)
}
// GetAllSubjects gets the list of subjects that show up in the current policy.
func (e *SyncedEnforcer) GetAllSubjects() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllSubjects()
}
// GetAllObjects gets the list of objects that show up in the current policy.
func (e *SyncedEnforcer) GetAllObjects() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllObjects()
}
// GetAllActions gets the list of actions that show up in the current policy.
func (e *SyncedEnforcer) GetAllActions() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllActions()
}
// GetAllRoles gets the list of roles that show up in the current policy.
func (e *SyncedEnforcer) GetAllRoles() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllRoles()
}
// GetPolicy gets all the authorization rules in the policy.
func (e *SyncedEnforcer) GetPolicy() [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetPolicy()
}
// GetFilteredPolicy gets all the authorization rules in the policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredPolicy(fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredPolicy(fieldIndex, fieldValues...)
}
// GetGroupingPolicy gets all the role inheritance rules in the policy.
func (e *SyncedEnforcer) GetGroupingPolicy() [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetGroupingPolicy()
}
// GetFilteredGroupingPolicy gets all the role inheritance rules in the policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredGroupingPolicy(fieldIndex, fieldValues...)
}
// HasPolicy determines whether an authorization rule exists.
func (e *SyncedEnforcer) HasPolicy(params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasPolicy(params...)
}
// AddPolicy adds an authorization rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddPolicy(params ...interface{}) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddPolicy(params...)
}
// RemovePolicy removes an authorization rule from the current policy.
func (e *SyncedEnforcer) RemovePolicy(params ...interface{}) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemovePolicy(params...)
}
// RemoveFilteredPolicy removes an authorization rule from the current policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredPolicy(fieldIndex int, fieldValues ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredPolicy(fieldIndex, fieldValues...)
}
// HasGroupingPolicy determines whether a role inheritance rule exists.
func (e *SyncedEnforcer) HasGroupingPolicy(params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasGroupingPolicy(params...)
}
// AddGroupingPolicy adds a role inheritance rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddGroupingPolicy(params ...interface{}) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddGroupingPolicy(params...)
}
// RemoveGroupingPolicy removes a role inheritance rule from the current policy.
func (e *SyncedEnforcer) RemoveGroupingPolicy(params ...interface{}) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveGroupingPolicy(params...)
}
// RemoveFilteredGroupingPolicy removes a role inheritance rule from the current policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredGroupingPolicy(fieldIndex, fieldValues...)
}

85
vendor/github.com/casbin/casbin/internal_api.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
const (
notImplemented = "not implemented"
)
// addPolicy adds a rule to the current policy.
func (e *Enforcer) addPolicy(sec string, ptype string, rule []string) bool {
ruleAdded := e.model.AddPolicy(sec, ptype, rule)
if !ruleAdded {
return ruleAdded
}
if e.adapter != nil && e.autoSave {
if err := e.adapter.AddPolicy(sec, ptype, rule); err != nil {
if err.Error() != notImplemented {
panic(err)
}
}
if e.watcher != nil {
// error intentionally ignored
e.watcher.Update()
}
}
return ruleAdded
}
// removePolicy removes a rule from the current policy.
func (e *Enforcer) removePolicy(sec string, ptype string, rule []string) bool {
ruleRemoved := e.model.RemovePolicy(sec, ptype, rule)
if !ruleRemoved {
return ruleRemoved
}
if e.adapter != nil && e.autoSave {
if err := e.adapter.RemovePolicy(sec, ptype, rule); err != nil {
if err.Error() != notImplemented {
panic(err)
}
}
if e.watcher != nil {
// error intentionally ignored
e.watcher.Update()
}
}
return ruleRemoved
}
// removeFilteredPolicy removes rules based on field filters from the current policy.
func (e *Enforcer) removeFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) bool {
ruleRemoved := e.model.RemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...)
if !ruleRemoved {
return ruleRemoved
}
if e.adapter != nil && e.autoSave {
if err := e.adapter.RemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...); err != nil {
if err.Error() != notImplemented {
panic(err)
}
}
if e.watcher != nil {
// error intentionally ignored
e.watcher.Update()
}
}
return ruleRemoved
}

265
vendor/github.com/casbin/casbin/management_api.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
// GetAllSubjects gets the list of subjects that show up in the current policy.
func (e *Enforcer) GetAllSubjects() []string {
return e.GetAllNamedSubjects("p")
}
// GetAllNamedSubjects gets the list of subjects that show up in the current named policy.
func (e *Enforcer) GetAllNamedSubjects(ptype string) []string {
return e.model.GetValuesForFieldInPolicy("p", ptype, 0)
}
// GetAllObjects gets the list of objects that show up in the current policy.
func (e *Enforcer) GetAllObjects() []string {
return e.GetAllNamedObjects("p")
}
// GetAllNamedObjects gets the list of objects that show up in the current named policy.
func (e *Enforcer) GetAllNamedObjects(ptype string) []string {
return e.model.GetValuesForFieldInPolicy("p", ptype, 1)
}
// GetAllActions gets the list of actions that show up in the current policy.
func (e *Enforcer) GetAllActions() []string {
return e.GetAllNamedActions("p")
}
// GetAllNamedActions gets the list of actions that show up in the current named policy.
func (e *Enforcer) GetAllNamedActions(ptype string) []string {
return e.model.GetValuesForFieldInPolicy("p", ptype, 2)
}
// GetAllRoles gets the list of roles that show up in the current policy.
func (e *Enforcer) GetAllRoles() []string {
return e.GetAllNamedRoles("g")
}
// GetAllNamedRoles gets the list of roles that show up in the current named policy.
func (e *Enforcer) GetAllNamedRoles(ptype string) []string {
return e.model.GetValuesForFieldInPolicy("g", ptype, 1)
}
// GetPolicy gets all the authorization rules in the policy.
func (e *Enforcer) GetPolicy() [][]string {
return e.GetNamedPolicy("p")
}
// GetFilteredPolicy gets all the authorization rules in the policy, field filters can be specified.
func (e *Enforcer) GetFilteredPolicy(fieldIndex int, fieldValues ...string) [][]string {
return e.GetFilteredNamedPolicy("p", fieldIndex, fieldValues...)
}
// GetNamedPolicy gets all the authorization rules in the named policy.
func (e *Enforcer) GetNamedPolicy(ptype string) [][]string {
return e.model.GetPolicy("p", ptype)
}
// GetFilteredNamedPolicy gets all the authorization rules in the named policy, field filters can be specified.
func (e *Enforcer) GetFilteredNamedPolicy(ptype string, fieldIndex int, fieldValues ...string) [][]string {
return e.model.GetFilteredPolicy("p", ptype, fieldIndex, fieldValues...)
}
// GetGroupingPolicy gets all the role inheritance rules in the policy.
func (e *Enforcer) GetGroupingPolicy() [][]string {
return e.GetNamedGroupingPolicy("g")
}
// GetFilteredGroupingPolicy gets all the role inheritance rules in the policy, field filters can be specified.
func (e *Enforcer) GetFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) [][]string {
return e.GetFilteredNamedGroupingPolicy("g", fieldIndex, fieldValues...)
}
// GetNamedGroupingPolicy gets all the role inheritance rules in the policy.
func (e *Enforcer) GetNamedGroupingPolicy(ptype string) [][]string {
return e.model.GetPolicy("g", ptype)
}
// GetFilteredNamedGroupingPolicy gets all the role inheritance rules in the policy, field filters can be specified.
func (e *Enforcer) GetFilteredNamedGroupingPolicy(ptype string, fieldIndex int, fieldValues ...string) [][]string {
return e.model.GetFilteredPolicy("g", ptype, fieldIndex, fieldValues...)
}
// HasPolicy determines whether an authorization rule exists.
func (e *Enforcer) HasPolicy(params ...interface{}) bool {
return e.HasNamedPolicy("p", params...)
}
// HasNamedPolicy determines whether a named authorization rule exists.
func (e *Enforcer) HasNamedPolicy(ptype string, params ...interface{}) bool {
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
return e.model.HasPolicy("p", ptype, strSlice)
}
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
return e.model.HasPolicy("p", ptype, policy)
}
// AddPolicy adds an authorization rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *Enforcer) AddPolicy(params ...interface{}) bool {
return e.AddNamedPolicy("p", params...)
}
// AddNamedPolicy adds an authorization rule to the current named policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *Enforcer) AddNamedPolicy(ptype string, params ...interface{}) bool {
var ruleAdded bool
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
ruleAdded = e.addPolicy("p", ptype, strSlice)
} else {
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
ruleAdded = e.addPolicy("p", ptype, policy)
}
return ruleAdded
}
// RemovePolicy removes an authorization rule from the current policy.
func (e *Enforcer) RemovePolicy(params ...interface{}) bool {
return e.RemoveNamedPolicy("p", params...)
}
// RemoveFilteredPolicy removes an authorization rule from the current policy, field filters can be specified.
func (e *Enforcer) RemoveFilteredPolicy(fieldIndex int, fieldValues ...string) bool {
return e.RemoveFilteredNamedPolicy("p", fieldIndex, fieldValues...)
}
// RemoveNamedPolicy removes an authorization rule from the current named policy.
func (e *Enforcer) RemoveNamedPolicy(ptype string, params ...interface{}) bool {
var ruleRemoved bool
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
ruleRemoved = e.removePolicy("p", ptype, strSlice)
} else {
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
ruleRemoved = e.removePolicy("p", ptype, policy)
}
return ruleRemoved
}
// RemoveFilteredNamedPolicy removes an authorization rule from the current named policy, field filters can be specified.
func (e *Enforcer) RemoveFilteredNamedPolicy(ptype string, fieldIndex int, fieldValues ...string) bool {
return e.removeFilteredPolicy("p", ptype, fieldIndex, fieldValues...)
}
// HasGroupingPolicy determines whether a role inheritance rule exists.
func (e *Enforcer) HasGroupingPolicy(params ...interface{}) bool {
return e.HasNamedGroupingPolicy("g", params...)
}
// HasNamedGroupingPolicy determines whether a named role inheritance rule exists.
func (e *Enforcer) HasNamedGroupingPolicy(ptype string, params ...interface{}) bool {
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
return e.model.HasPolicy("g", ptype, strSlice)
}
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
return e.model.HasPolicy("g", ptype, policy)
}
// AddGroupingPolicy adds a role inheritance rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *Enforcer) AddGroupingPolicy(params ...interface{}) bool {
return e.AddNamedGroupingPolicy("g", params...)
}
// AddNamedGroupingPolicy adds a named role inheritance rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *Enforcer) AddNamedGroupingPolicy(ptype string, params ...interface{}) bool {
var ruleAdded bool
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
ruleAdded = e.addPolicy("g", ptype, strSlice)
} else {
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
ruleAdded = e.addPolicy("g", ptype, policy)
}
if e.autoBuildRoleLinks {
e.BuildRoleLinks()
}
return ruleAdded
}
// RemoveGroupingPolicy removes a role inheritance rule from the current policy.
func (e *Enforcer) RemoveGroupingPolicy(params ...interface{}) bool {
return e.RemoveNamedGroupingPolicy("g", params...)
}
// RemoveFilteredGroupingPolicy removes a role inheritance rule from the current policy, field filters can be specified.
func (e *Enforcer) RemoveFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) bool {
return e.RemoveFilteredNamedGroupingPolicy("g", fieldIndex, fieldValues...)
}
// RemoveNamedGroupingPolicy removes a role inheritance rule from the current named policy.
func (e *Enforcer) RemoveNamedGroupingPolicy(ptype string, params ...interface{}) bool {
var ruleRemoved bool
if strSlice, ok := params[0].([]string); len(params) == 1 && ok {
ruleRemoved = e.removePolicy("g", ptype, strSlice)
} else {
policy := make([]string, 0)
for _, param := range params {
policy = append(policy, param.(string))
}
ruleRemoved = e.removePolicy("g", ptype, policy)
}
if e.autoBuildRoleLinks {
e.BuildRoleLinks()
}
return ruleRemoved
}
// RemoveFilteredNamedGroupingPolicy removes a role inheritance rule from the current named policy, field filters can be specified.
func (e *Enforcer) RemoveFilteredNamedGroupingPolicy(ptype string, fieldIndex int, fieldValues ...string) bool {
ruleRemoved := e.removeFilteredPolicy("g", ptype, fieldIndex, fieldValues...)
if e.autoBuildRoleLinks {
e.BuildRoleLinks()
}
return ruleRemoved
}
// AddFunction adds a customized function.
func (e *Enforcer) AddFunction(name string, function func(args ...interface{}) (interface{}, error)) {
e.fm.AddFunction(name, function)
}

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vendor/github.com/casbin/casbin/model/assertion.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package model
import (
"errors"
"strings"
"github.com/casbin/casbin/rbac"
"github.com/casbin/casbin/util"
)
// Assertion represents an expression in a section of the model.
// For example: r = sub, obj, act
type Assertion struct {
Key string
Value string
Tokens []string
Policy [][]string
RM rbac.RoleManager
}
func (ast *Assertion) buildRoleLinks(rm rbac.RoleManager) {
ast.RM = rm
count := strings.Count(ast.Value, "_")
for _, rule := range ast.Policy {
if count < 2 {
panic(errors.New("the number of \"_\" in role definition should be at least 2"))
}
if len(rule) < count {
panic(errors.New("grouping policy elements do not meet role definition"))
}
if count == 2 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1])
} else if count == 3 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1], rule[2])
} else if count == 4 {
// error intentionally ignored
ast.RM.AddLink(rule[0], rule[1], rule[2], rule[3])
}
}
util.LogPrint("Role links for: " + ast.Key)
ast.RM.PrintRoles()
}

40
vendor/github.com/casbin/casbin/model/function.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package model
import "github.com/casbin/casbin/util"
// FunctionMap represents the collection of Function.
type FunctionMap map[string]func(args ...interface{}) (interface{}, error)
// Function represents a function that is used in the matchers, used to get attributes in ABAC.
type Function func(args ...interface{}) (interface{}, error)
// AddFunction adds an expression function.
func (fm FunctionMap) AddFunction(name string, function Function) {
fm[name] = function
}
// LoadFunctionMap loads an initial function map.
func LoadFunctionMap() FunctionMap {
fm := make(FunctionMap)
fm.AddFunction("keyMatch", util.KeyMatchFunc)
fm.AddFunction("keyMatch2", util.KeyMatch2Func)
fm.AddFunction("regexMatch", util.RegexMatchFunc)
fm.AddFunction("ipMatch", util.IPMatchFunc)
return fm
}

129
vendor/github.com/casbin/casbin/model/model.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package model
import (
"strconv"
"strings"
"github.com/casbin/casbin/config"
"github.com/casbin/casbin/util"
)
// Model represents the whole access control model.
type Model map[string]AssertionMap
// AssertionMap is the collection of assertions, can be "r", "p", "g", "e", "m".
type AssertionMap map[string]*Assertion
var sectionNameMap = map[string]string{
"r": "request_definition",
"p": "policy_definition",
"g": "role_definition",
"e": "policy_effect",
"m": "matchers",
}
func loadAssertion(model Model, cfg config.ConfigInterface, sec string, key string) bool {
value := cfg.String(sectionNameMap[sec] + "::" + key)
return model.AddDef(sec, key, value)
}
// AddDef adds an assertion to the model.
func (model Model) AddDef(sec string, key string, value string) bool {
ast := Assertion{}
ast.Key = key
ast.Value = value
if ast.Value == "" {
return false
}
if sec == "r" || sec == "p" {
ast.Tokens = strings.Split(ast.Value, ", ")
for i := range ast.Tokens {
ast.Tokens[i] = key + "_" + ast.Tokens[i]
}
} else {
ast.Value = util.RemoveComments(util.EscapeAssertion(ast.Value))
}
_, ok := model[sec]
if !ok {
model[sec] = make(AssertionMap)
}
model[sec][key] = &ast
return true
}
func getKeySuffix(i int) string {
if i == 1 {
return ""
}
return strconv.Itoa(i)
}
func loadSection(model Model, cfg config.ConfigInterface, sec string) {
i := 1
for {
if !loadAssertion(model, cfg, sec, sec+getKeySuffix(i)) {
break
} else {
i++
}
}
}
// LoadModel loads the model from model CONF file.
func (model Model) LoadModel(path string) {
cfg, err := config.NewConfig(path)
if err != nil {
panic(err)
}
loadSection(model, cfg, "r")
loadSection(model, cfg, "p")
loadSection(model, cfg, "e")
loadSection(model, cfg, "m")
loadSection(model, cfg, "g")
}
// LoadModelFromText loads the model from the text.
func (model Model) LoadModelFromText(text string) {
cfg, err := config.NewConfigFromText(text)
if err != nil {
panic(err)
}
loadSection(model, cfg, "r")
loadSection(model, cfg, "p")
loadSection(model, cfg, "e")
loadSection(model, cfg, "m")
loadSection(model, cfg, "g")
}
// PrintModel prints the model to the log.
func (model Model) PrintModel() {
util.LogPrint("Model:")
for k, v := range model {
for i, j := range v {
util.LogPrintf("%s.%s: %s", k, i, j.Value)
}
}
}

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vendor/github.com/casbin/casbin/model/policy.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package model
import (
"github.com/casbin/casbin/rbac"
"github.com/casbin/casbin/util"
)
// BuildRoleLinks initializes the roles in RBAC.
func (model Model) BuildRoleLinks(rm rbac.RoleManager) {
for _, ast := range model["g"] {
ast.buildRoleLinks(rm)
}
}
// PrintPolicy prints the policy to log.
func (model Model) PrintPolicy() {
util.LogPrint("Policy:")
for key, ast := range model["p"] {
util.LogPrint(key, ": ", ast.Value, ": ", ast.Policy)
}
for key, ast := range model["g"] {
util.LogPrint(key, ": ", ast.Value, ": ", ast.Policy)
}
}
// ClearPolicy clears all current policy.
func (model Model) ClearPolicy() {
for _, ast := range model["p"] {
ast.Policy = nil
}
for _, ast := range model["g"] {
ast.Policy = nil
}
}
// GetPolicy gets all rules in a policy.
func (model Model) GetPolicy(sec string, ptype string) [][]string {
return model[sec][ptype].Policy
}
// GetFilteredPolicy gets rules based on field filters from a policy.
func (model Model) GetFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) [][]string {
res := [][]string{}
for _, rule := range model[sec][ptype].Policy {
matched := true
for i, fieldValue := range fieldValues {
if fieldValue != "" && rule[fieldIndex+i] != fieldValue {
matched = false
break
}
}
if matched {
res = append(res, rule)
}
}
return res
}
// HasPolicy determines whether a model has the specified policy rule.
func (model Model) HasPolicy(sec string, ptype string, rule []string) bool {
for _, r := range model[sec][ptype].Policy {
if util.ArrayEquals(rule, r) {
return true
}
}
return false
}
// AddPolicy adds a policy rule to the model.
func (model Model) AddPolicy(sec string, ptype string, rule []string) bool {
if !model.HasPolicy(sec, ptype, rule) {
model[sec][ptype].Policy = append(model[sec][ptype].Policy, rule)
return true
}
return false
}
// RemovePolicy removes a policy rule from the model.
func (model Model) RemovePolicy(sec string, ptype string, rule []string) bool {
for i, r := range model[sec][ptype].Policy {
if util.ArrayEquals(rule, r) {
model[sec][ptype].Policy = append(model[sec][ptype].Policy[:i], model[sec][ptype].Policy[i+1:]...)
return true
}
}
return false
}
// RemoveFilteredPolicy removes policy rules based on field filters from the model.
func (model Model) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) bool {
tmp := [][]string{}
res := false
for _, rule := range model[sec][ptype].Policy {
matched := true
for i, fieldValue := range fieldValues {
if fieldValue != "" && rule[fieldIndex+i] != fieldValue {
matched = false
break
}
}
if matched {
res = true
} else {
tmp = append(tmp, rule)
}
}
model[sec][ptype].Policy = tmp
return res
}
// GetValuesForFieldInPolicy gets all values for a field for all rules in a policy, duplicated values are removed.
func (model Model) GetValuesForFieldInPolicy(sec string, ptype string, fieldIndex int) []string {
values := []string{}
for _, rule := range model[sec][ptype].Policy {
values = append(values, rule[fieldIndex])
}
util.ArrayRemoveDuplicates(&values)
// sort.Strings(values)
return values
}

56
vendor/github.com/casbin/casbin/persist/adapter.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package persist
import (
"strings"
"github.com/casbin/casbin/model"
)
// LoadPolicyLine loads a text line as a policy rule to model.
func LoadPolicyLine(line string, model model.Model) {
if line == "" {
return
}
if strings.HasPrefix(line, "#") {
return
}
tokens := strings.Split(line, ", ")
key := tokens[0]
sec := key[:1]
model[sec][key].Policy = append(model[sec][key].Policy, tokens[1:])
}
// Adapter is the interface for Casbin adapters.
type Adapter interface {
// LoadPolicy loads all policy rules from the storage.
LoadPolicy(model model.Model) error
// SavePolicy saves all policy rules to the storage.
SavePolicy(model model.Model) error
// AddPolicy adds a policy rule to the storage.
// This is part of the Auto-Save feature.
AddPolicy(sec string, ptype string, rule []string) error
// RemovePolicy removes a policy rule from the storage.
// This is part of the Auto-Save feature.
RemovePolicy(sec string, ptype string, rule []string) error
// RemoveFilteredPolicy removes policy rules that match the filter from the storage.
// This is part of the Auto-Save feature.
RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error
}

29
vendor/github.com/casbin/casbin/persist/adapter_filtered.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package persist
import (
"github.com/casbin/casbin/model"
)
// FilteredAdapter is the interface for Casbin adapters supporting filtered policies.
type FilteredAdapter interface {
Adapter
// LoadFilteredPolicy loads only policy rules that match the filter.
LoadFilteredPolicy(model model.Model, filter interface{}) error
// IsFiltered returns true if the loaded policy has been filtered.
IsFiltered() bool
}

117
vendor/github.com/casbin/casbin/persist/file-adapter/adapter.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fileadapter
import (
"bufio"
"bytes"
"errors"
"os"
"strings"
"github.com/casbin/casbin/model"
"github.com/casbin/casbin/persist"
"github.com/casbin/casbin/util"
)
// Adapter is the file adapter for Casbin.
// It can load policy from file or save policy to file.
type Adapter struct {
filePath string
}
// NewAdapter is the constructor for Adapter.
func NewAdapter(filePath string) *Adapter {
return &Adapter{filePath: filePath}
}
// LoadPolicy loads all policy rules from the storage.
func (a *Adapter) LoadPolicy(model model.Model) error {
if a.filePath == "" {
return errors.New("invalid file path, file path cannot be empty")
}
return a.loadPolicyFile(model, persist.LoadPolicyLine)
}
// SavePolicy saves all policy rules to the storage.
func (a *Adapter) SavePolicy(model model.Model) error {
if a.filePath == "" {
return errors.New("invalid file path, file path cannot be empty")
}
var tmp bytes.Buffer
for ptype, ast := range model["p"] {
for _, rule := range ast.Policy {
tmp.WriteString(ptype + ", ")
tmp.WriteString(util.ArrayToString(rule))
tmp.WriteString("\n")
}
}
for ptype, ast := range model["g"] {
for _, rule := range ast.Policy {
tmp.WriteString(ptype + ", ")
tmp.WriteString(util.ArrayToString(rule))
tmp.WriteString("\n")
}
}
return a.savePolicyFile(strings.TrimRight(tmp.String(), "\n"))
}
func (a *Adapter) loadPolicyFile(model model.Model, handler func(string, model.Model)) error {
f, err := os.Open(a.filePath)
if err != nil {
return err
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
handler(line, model)
}
return scanner.Err()
}
func (a *Adapter) savePolicyFile(text string) error {
f, err := os.Create(a.filePath)
if err != nil {
return err
}
w := bufio.NewWriter(f)
// error intentionally ignored
w.WriteString(text)
w.Flush()
f.Close()
return nil
}
// AddPolicy adds a policy rule to the storage.
func (a *Adapter) AddPolicy(sec string, ptype string, rule []string) error {
return errors.New("not implemented")
}
// RemovePolicy removes a policy rule from the storage.
func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error {
return errors.New("not implemented")
}
// RemoveFilteredPolicy removes policy rules that match the filter from the storage.
func (a *Adapter) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error {
return errors.New("not implemented")
}

137
vendor/github.com/casbin/casbin/persist/file-adapter/adapter_filtered.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fileadapter
import (
"bufio"
"errors"
"os"
"strings"
"github.com/casbin/casbin/model"
"github.com/casbin/casbin/persist"
)
// FilteredAdapter is the filtered file adapter for Casbin. It can load policy
// from file or save policy to file and supports loading of filtered policies.
type FilteredAdapter struct {
*Adapter
filtered bool
}
// Filter defines the filtering rules for a FilteredAdapter's policy. Empty values
// are ignored, but all others must match the filter.
type Filter struct {
P []string
G []string
}
// NewFilteredAdapter is the constructor for FilteredAdapter.
func NewFilteredAdapter(filePath string) *FilteredAdapter {
a := FilteredAdapter{}
a.Adapter = NewAdapter(filePath)
return &a
}
// LoadPolicy loads all policy rules from the storage.
func (a *FilteredAdapter) LoadPolicy(model model.Model) error {
a.filtered = false
return a.Adapter.LoadPolicy(model)
}
// LoadFilteredPolicy loads only policy rules that match the filter.
func (a *FilteredAdapter) LoadFilteredPolicy(model model.Model, filter interface{}) error {
if filter == nil {
return a.LoadPolicy(model)
}
if a.filePath == "" {
return errors.New("invalid file path, file path cannot be empty")
}
filterValue, ok := filter.(*Filter)
if !ok {
return errors.New("invalid filter type")
}
err := a.loadFilteredPolicyFile(model, filterValue, persist.LoadPolicyLine)
if err == nil {
a.filtered = true
}
return err
}
func (a *FilteredAdapter) loadFilteredPolicyFile(model model.Model, filter *Filter, handler func(string, model.Model)) error {
f, err := os.Open(a.filePath)
if err != nil {
return err
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if filterLine(line, filter) {
continue
}
handler(line, model)
}
return scanner.Err()
}
// IsFiltered returns true if the loaded policy has been filtered.
func (a *FilteredAdapter) IsFiltered() bool {
return a.filtered
}
// SavePolicy saves all policy rules to the storage.
func (a *FilteredAdapter) SavePolicy(model model.Model) error {
if a.filtered {
return errors.New("cannot save a filtered policy")
}
return a.Adapter.SavePolicy(model)
}
func filterLine(line string, filter *Filter) bool {
if filter == nil {
return false
}
p := strings.Split(line, ",")
if len(p) == 0 {
return true
}
var filterSlice []string
switch strings.TrimSpace(p[0]) {
case "p":
filterSlice = filter.P
case "g":
filterSlice = filter.G
}
return filterWords(p, filterSlice)
}
func filterWords(line []string, filter []string) bool {
if len(line) < len(filter)+1 {
return true
}
var skipLine bool
for i, v := range filter {
if len(v) > 0 && strings.TrimSpace(v) != strings.TrimSpace(line[i+1]) {
skipLine = true
break
}
}
return skipLine
}

100
vendor/github.com/casbin/casbin/persist/file-adapter/adapter_mock.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fileadapter
import (
"bufio"
"errors"
"io"
"os"
"strings"
"github.com/casbin/casbin/model"
"github.com/casbin/casbin/persist"
)
// AdapterMock is the file adapter for Casbin.
// It can load policy from file or save policy to file.
type AdapterMock struct {
filePath string
errorValue string
}
// NewAdapterMock is the constructor for AdapterMock.
func NewAdapterMock(filePath string) *AdapterMock {
a := AdapterMock{}
a.filePath = filePath
return &a
}
// LoadPolicy loads all policy rules from the storage.
func (a *AdapterMock) LoadPolicy(model model.Model) error {
err := a.loadPolicyFile(model, persist.LoadPolicyLine)
return err
}
// SavePolicy saves all policy rules to the storage.
func (a *AdapterMock) SavePolicy(model model.Model) error {
return nil
}
func (a *AdapterMock) loadPolicyFile(model model.Model, handler func(string, model.Model)) error {
f, err := os.Open(a.filePath)
if err != nil {
return err
}
defer f.Close()
buf := bufio.NewReader(f)
for {
line, err := buf.ReadString('\n')
line = strings.TrimSpace(line)
handler(line, model)
if err != nil {
if err == io.EOF {
return nil
}
}
}
}
// SetMockErr sets string to be returned by of the mock during testing
func (a *AdapterMock) SetMockErr(errorToSet string) {
a.errorValue = errorToSet
}
// GetMockErr returns a mock error or nil
func (a *AdapterMock) GetMockErr() error {
var returnError error
if a.errorValue != "" {
returnError = errors.New(a.errorValue)
}
return returnError
}
// AddPolicy adds a policy rule to the storage.
func (a *AdapterMock) AddPolicy(sec string, ptype string, rule []string) error {
return a.GetMockErr()
}
// RemovePolicy removes a policy rule from the storage.
func (a *AdapterMock) RemovePolicy(sec string, ptype string, rule []string) error {
return a.GetMockErr()
}
// RemoveFilteredPolicy removes policy rules that match the filter from the storage.
func (a *AdapterMock) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error {
return a.GetMockErr()
}

27
vendor/github.com/casbin/casbin/persist/watcher.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package persist
// Watcher is the interface for Casbin watchers.
type Watcher interface {
// SetUpdateCallback sets the callback function that the watcher will call
// when the policy in DB has been changed by other instances.
// A classic callback is Enforcer.LoadPolicy().
SetUpdateCallback(func(string)) error
// Update calls the update callback of other instances to synchronize their policy.
// It is usually called after changing the policy in DB, like Enforcer.SavePolicy(),
// Enforcer.AddPolicy(), Enforcer.RemovePolicy(), etc.
Update() error
}

257
vendor/github.com/casbin/casbin/rbac/default-role-manager/role_manager.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package defaultrolemanager
import (
"errors"
"sync"
"github.com/casbin/casbin/rbac"
"github.com/casbin/casbin/util"
)
// RoleManager provides a default implementation for the RoleManager interface
type RoleManager struct {
allRoles *sync.Map
maxHierarchyLevel int
}
// NewRoleManager is the constructor for creating an instance of the
// default RoleManager implementation.
func NewRoleManager(maxHierarchyLevel int) rbac.RoleManager {
rm := RoleManager{}
rm.allRoles = &sync.Map{}
rm.maxHierarchyLevel = maxHierarchyLevel
return &rm
}
func (rm *RoleManager) hasRole(name string) bool {
_, ok := rm.allRoles.Load(name)
return ok
}
func (rm *RoleManager) createRole(name string) *Role {
role, _ := rm.allRoles.LoadOrStore(name, newRole(name))
return role.(*Role)
}
// Clear clears all stored data and resets the role manager to the initial state.
func (rm *RoleManager) Clear() error {
rm.allRoles = &sync.Map{}
return nil
}
// AddLink adds the inheritance link between role: name1 and role: name2.
// aka role: name1 inherits role: name2.
// domain is a prefix to the roles.
func (rm *RoleManager) AddLink(name1 string, name2 string, domain ...string) error {
if len(domain) == 1 {
name1 = domain[0] + "::" + name1
name2 = domain[0] + "::" + name2
} else if len(domain) > 1 {
return errors.New("error: domain should be 1 parameter")
}
role1 := rm.createRole(name1)
role2 := rm.createRole(name2)
role1.addRole(role2)
return nil
}
// DeleteLink deletes the inheritance link between role: name1 and role: name2.
// aka role: name1 does not inherit role: name2 any more.
// domain is a prefix to the roles.
func (rm *RoleManager) DeleteLink(name1 string, name2 string, domain ...string) error {
if len(domain) == 1 {
name1 = domain[0] + "::" + name1
name2 = domain[0] + "::" + name2
} else if len(domain) > 1 {
return errors.New("error: domain should be 1 parameter")
}
if !rm.hasRole(name1) || !rm.hasRole(name2) {
return errors.New("error: name1 or name2 does not exist")
}
role1 := rm.createRole(name1)
role2 := rm.createRole(name2)
role1.deleteRole(role2)
return nil
}
// HasLink determines whether role: name1 inherits role: name2.
// domain is a prefix to the roles.
func (rm *RoleManager) HasLink(name1 string, name2 string, domain ...string) (bool, error) {
if len(domain) == 1 {
name1 = domain[0] + "::" + name1
name2 = domain[0] + "::" + name2
} else if len(domain) > 1 {
return false, errors.New("error: domain should be 1 parameter")
}
if name1 == name2 {
return true, nil
}
if !rm.hasRole(name1) || !rm.hasRole(name2) {
return false, nil
}
role1 := rm.createRole(name1)
return role1.hasRole(name2, rm.maxHierarchyLevel), nil
}
// GetRoles gets the roles that a subject inherits.
// domain is a prefix to the roles.
func (rm *RoleManager) GetRoles(name string, domain ...string) ([]string, error) {
if len(domain) == 1 {
name = domain[0] + "::" + name
} else if len(domain) > 1 {
return nil, errors.New("error: domain should be 1 parameter")
}
if !rm.hasRole(name) {
return nil, errors.New("error: name does not exist")
}
roles := rm.createRole(name).getRoles()
if len(domain) == 1 {
for i := range roles {
roles[i] = roles[i][len(domain[0])+2:]
}
}
return roles, nil
}
// GetUsers gets the users that inherits a subject.
// domain is an unreferenced parameter here, may be used in other implementations.
func (rm *RoleManager) GetUsers(name string, domain ...string) ([]string, error) {
if !rm.hasRole(name) {
return nil, errors.New("error: name does not exist")
}
names := []string{}
rm.allRoles.Range(func(_, value interface{}) bool {
role := value.(*Role)
if role.hasDirectRole(name) {
names = append(names, role.name)
}
return true
})
return names, nil
}
// PrintRoles prints all the roles to log.
func (rm *RoleManager) PrintRoles() error {
line := ""
rm.allRoles.Range(func(_, value interface{}) bool {
if text := value.(*Role).toString(); text != "" {
if line == "" {
line = text
} else {
line += ", " + text
}
}
return true
})
util.LogPrint(line)
return nil
}
// Role represents the data structure for a role in RBAC.
type Role struct {
name string
roles []*Role
}
func newRole(name string) *Role {
r := Role{}
r.name = name
return &r
}
func (r *Role) addRole(role *Role) {
for _, rr := range r.roles {
if rr.name == role.name {
return
}
}
r.roles = append(r.roles, role)
}
func (r *Role) deleteRole(role *Role) {
for i, rr := range r.roles {
if rr.name == role.name {
r.roles = append(r.roles[:i], r.roles[i+1:]...)
return
}
}
}
func (r *Role) hasRole(name string, hierarchyLevel int) bool {
if r.name == name {
return true
}
if hierarchyLevel <= 0 {
return false
}
for _, role := range r.roles {
if role.hasRole(name, hierarchyLevel-1) {
return true
}
}
return false
}
func (r *Role) hasDirectRole(name string) bool {
for _, role := range r.roles {
if role.name == name {
return true
}
}
return false
}
func (r *Role) toString() string {
names := ""
if len(r.roles) == 0 {
return ""
}
for i, role := range r.roles {
if i == 0 {
names += role.name
} else {
names += ", " + role.name
}
}
if len(r.roles) == 1 {
return r.name + " < " + names
} else {
return r.name + " < (" + names + ")"
}
}
func (r *Role) getRoles() []string {
names := []string{}
for _, role := range r.roles {
names = append(names, role.name)
}
return names
}

38
vendor/github.com/casbin/casbin/rbac/role_manager.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rbac
// RoleManager provides interface to define the operations for managing roles.
type RoleManager interface {
// Clear clears all stored data and resets the role manager to the initial state.
Clear() error
// AddLink adds the inheritance link between two roles. role: name1 and role: name2.
// domain is a prefix to the roles (can be used for other purposes).
AddLink(name1 string, name2 string, domain ...string) error
// DeleteLink deletes the inheritance link between two roles. role: name1 and role: name2.
// domain is a prefix to the roles (can be used for other purposes).
DeleteLink(name1 string, name2 string, domain ...string) error
// HasLink determines whether a link exists between two roles. role: name1 inherits role: name2.
// domain is a prefix to the roles (can be used for other purposes).
HasLink(name1 string, name2 string, domain ...string) (bool, error)
// GetRoles gets the roles that a user inherits.
// domain is a prefix to the roles (can be used for other purposes).
GetRoles(name string, domain ...string) ([]string, error)
// GetUsers gets the users that inherits a role.
// domain is a prefix to the users (can be used for other purposes).
GetUsers(name string, domain ...string) ([]string, error)
// PrintRoles prints all the roles to log.
PrintRoles() error
}

127
vendor/github.com/casbin/casbin/rbac_api.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
// GetRolesForUser gets the roles that a user has.
func (e *Enforcer) GetRolesForUser(name string) []string {
res, _ := e.model["g"]["g"].RM.GetRoles(name)
return res
}
// GetUsersForRole gets the users that has a role.
func (e *Enforcer) GetUsersForRole(name string) []string {
res, _ := e.model["g"]["g"].RM.GetUsers(name)
return res
}
// HasRoleForUser determines whether a user has a role.
func (e *Enforcer) HasRoleForUser(name string, role string) bool {
roles := e.GetRolesForUser(name)
hasRole := false
for _, r := range roles {
if r == role {
hasRole = true
break
}
}
return hasRole
}
// AddRoleForUser adds a role for a user.
// Returns false if the user already has the role (aka not affected).
func (e *Enforcer) AddRoleForUser(user string, role string) bool {
return e.AddGroupingPolicy(user, role)
}
// DeleteRoleForUser deletes a role for a user.
// Returns false if the user does not have the role (aka not affected).
func (e *Enforcer) DeleteRoleForUser(user string, role string) bool {
return e.RemoveGroupingPolicy(user, role)
}
// DeleteRolesForUser deletes all roles for a user.
// Returns false if the user does not have any roles (aka not affected).
func (e *Enforcer) DeleteRolesForUser(user string) bool {
return e.RemoveFilteredGroupingPolicy(0, user)
}
// DeleteUser deletes a user.
// Returns false if the user does not exist (aka not affected).
func (e *Enforcer) DeleteUser(user string) bool {
return e.RemoveFilteredGroupingPolicy(0, user)
}
// DeleteRole deletes a role.
func (e *Enforcer) DeleteRole(role string) {
e.RemoveFilteredGroupingPolicy(1, role)
e.RemoveFilteredPolicy(0, role)
}
// DeletePermission deletes a permission.
// Returns false if the permission does not exist (aka not affected).
func (e *Enforcer) DeletePermission(permission ...string) bool {
return e.RemoveFilteredPolicy(1, permission...)
}
// AddPermissionForUser adds a permission for a user or role.
// Returns false if the user or role already has the permission (aka not affected).
func (e *Enforcer) AddPermissionForUser(user string, permission ...string) bool {
params := make([]interface{}, 0, len(permission)+1)
params = append(params, user)
for _, perm := range permission {
params = append(params, perm)
}
return e.AddPolicy(params...)
}
// DeletePermissionForUser deletes a permission for a user or role.
// Returns false if the user or role does not have the permission (aka not affected).
func (e *Enforcer) DeletePermissionForUser(user string, permission ...string) bool {
params := make([]interface{}, 0, len(permission)+1)
params = append(params, user)
for _, perm := range permission {
params = append(params, perm)
}
return e.RemovePolicy(params...)
}
// DeletePermissionsForUser deletes permissions for a user or role.
// Returns false if the user or role does not have any permissions (aka not affected).
func (e *Enforcer) DeletePermissionsForUser(user string) bool {
return e.RemoveFilteredPolicy(0, user)
}
// GetPermissionsForUser gets permissions for a user or role.
func (e *Enforcer) GetPermissionsForUser(user string) [][]string {
return e.GetFilteredPolicy(0, user)
}
// HasPermissionForUser determines whether a user has a permission.
func (e *Enforcer) HasPermissionForUser(user string, permission ...string) bool {
params := make([]interface{}, 0, len(permission)+1)
params = append(params, user)
for _, perm := range permission {
params = append(params, perm)
}
return e.HasPolicy(params...)
}

121
vendor/github.com/casbin/casbin/rbac_api_synced.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
// GetRolesForUser gets the roles that a user has.
func (e *SyncedEnforcer) GetRolesForUser(name string) []string {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.GetRolesForUser(name)
}
// GetUsersForRole gets the users that has a role.
func (e *SyncedEnforcer) GetUsersForRole(name string) []string {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.GetUsersForRole(name)
}
// HasRoleForUser determines whether a user has a role.
func (e *SyncedEnforcer) HasRoleForUser(name string, role string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.HasRoleForUser(name, role)
}
// AddRoleForUser adds a role for a user.
// Returns false if the user already has the role (aka not affected).
func (e *SyncedEnforcer) AddRoleForUser(user string, role string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddRoleForUser(user, role)
}
// DeleteRoleForUser deletes a role for a user.
// Returns false if the user does not have the role (aka not affected).
func (e *SyncedEnforcer) DeleteRoleForUser(user string, role string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeleteRoleForUser(user, role)
}
// DeleteRolesForUser deletes all roles for a user.
// Returns false if the user does not have any roles (aka not affected).
func (e *SyncedEnforcer) DeleteRolesForUser(user string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeleteRolesForUser(user)
}
// DeleteUser deletes a user.
// Returns false if the user does not exist (aka not affected).
func (e *SyncedEnforcer) DeleteUser(user string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeleteUser(user)
}
// DeleteRole deletes a role.
func (e *SyncedEnforcer) DeleteRole(role string) {
e.m.Lock()
defer e.m.Unlock()
e.Enforcer.DeleteRole(role)
}
// DeletePermission deletes a permission.
// Returns false if the permission does not exist (aka not affected).
func (e *SyncedEnforcer) DeletePermission(permission ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeletePermission(permission...)
}
// AddPermissionForUser adds a permission for a user or role.
// Returns false if the user or role already has the permission (aka not affected).
func (e *SyncedEnforcer) AddPermissionForUser(user string, permission ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddPermissionForUser(user, permission...)
}
// DeletePermissionForUser deletes a permission for a user or role.
// Returns false if the user or role does not have the permission (aka not affected).
func (e *SyncedEnforcer) DeletePermissionForUser(user string, permission ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeletePermissionForUser(user, permission...)
}
// DeletePermissionsForUser deletes permissions for a user or role.
// Returns false if the user or role does not have any permissions (aka not affected).
func (e *SyncedEnforcer) DeletePermissionsForUser(user string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.DeletePermissionsForUser(user)
}
// GetPermissionsForUser gets permissions for a user or role.
func (e *SyncedEnforcer) GetPermissionsForUser(user string) [][]string {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.GetPermissionsForUser(user)
}
// HasPermissionForUser determines whether a user has a permission.
func (e *SyncedEnforcer) HasPermissionForUser(user string, permission ...string) bool {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.HasPermissionForUser(user, permission...)
}

38
vendor/github.com/casbin/casbin/rbac_api_with_domains.go generated vendored Normal file
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
// GetRolesForUserInDomain gets the roles that a user has inside a domain.
func (e *Enforcer) GetRolesForUserInDomain(name string, domain string) []string {
res, _ := e.model["g"]["g"].RM.GetRoles(name, domain)
return res
}
// GetPermissionsForUserInDomain gets permissions for a user or role inside a domain.
func (e *Enforcer) GetPermissionsForUserInDomain(user string, domain string) [][]string {
return e.GetFilteredPolicy(0, user, domain)
}
// AddRoleForUserInDomain adds a role for a user inside a domain.
// Returns false if the user already has the role (aka not affected).
func (e *Enforcer) AddRoleForUserInDomain(user string, role string, domain string) bool {
return e.AddGroupingPolicy(user, role, domain)
}
// DeleteRoleForUserInDomain deletes a role for a user inside a domain.
// Returns false if the user does not have the role (aka not affected).
func (e *Enforcer) DeleteRoleForUserInDomain(user string, role string, domain string) bool {
return e.RemoveGroupingPolicy(user, role, domain)
}

160
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"net"
"regexp"
"strings"
"github.com/casbin/casbin/rbac"
)
// KeyMatch determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*"
func KeyMatch(key1 string, key2 string) bool {
i := strings.Index(key2, "*")
if i == -1 {
return key1 == key2
}
if len(key1) > i {
return key1[:i] == key2[:i]
}
return key1 == key2[:i]
}
// KeyMatchFunc is the wrapper for KeyMatch.
func KeyMatchFunc(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch(name1, name2)), nil
}
// KeyMatch2 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/:resource"
func KeyMatch2(key1 string, key2 string) bool {
key2 = strings.Replace(key2, "/*", "/.*", -1)
re := regexp.MustCompile(`(.*):[^/]+(.*)`)
for {
if !strings.Contains(key2, "/:") {
break
}
key2 = "^" + re.ReplaceAllString(key2, "$1[^/]+$2") + "$"
}
return RegexMatch(key1, key2)
}
// KeyMatch2Func is the wrapper for KeyMatch2.
func KeyMatch2Func(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch2(name1, name2)), nil
}
// KeyMatch3 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/{resource}"
func KeyMatch3(key1 string, key2 string) bool {
key2 = strings.Replace(key2, "/*", "/.*", -1)
re := regexp.MustCompile(`(.*)\{[^/]+\}(.*)`)
for {
if !strings.Contains(key2, "/{") {
break
}
key2 = re.ReplaceAllString(key2, "$1[^/]+$2")
}
return RegexMatch(key1, key2)
}
// KeyMatch3Func is the wrapper for KeyMatch3.
func KeyMatch3Func(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch3(name1, name2)), nil
}
// RegexMatch determines whether key1 matches the pattern of key2 in regular expression.
func RegexMatch(key1 string, key2 string) bool {
res, err := regexp.MatchString(key2, key1)
if err != nil {
panic(err)
}
return res
}
// RegexMatchFunc is the wrapper for RegexMatch.
func RegexMatchFunc(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(RegexMatch(name1, name2)), nil
}
// IPMatch determines whether IP address ip1 matches the pattern of IP address ip2, ip2 can be an IP address or a CIDR pattern.
// For example, "192.168.2.123" matches "192.168.2.0/24"
func IPMatch(ip1 string, ip2 string) bool {
objIP1 := net.ParseIP(ip1)
if objIP1 == nil {
panic("invalid argument: ip1 in IPMatch() function is not an IP address.")
}
_, cidr, err := net.ParseCIDR(ip2)
if err != nil {
objIP2 := net.ParseIP(ip2)
if objIP2 == nil {
panic("invalid argument: ip2 in IPMatch() function is neither an IP address nor a CIDR.")
}
return objIP1.Equal(objIP2)
}
return cidr.Contains(objIP1)
}
// IPMatchFunc is the wrapper for IPMatch.
func IPMatchFunc(args ...interface{}) (interface{}, error) {
ip1 := args[0].(string)
ip2 := args[1].(string)
return (bool)(IPMatch(ip1, ip2)), nil
}
// GenerateGFunction is the factory method of the g(_, _) function.
func GenerateGFunction(rm rbac.RoleManager) func(args ...interface{}) (interface{}, error) {
return func(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
if rm == nil {
return name1 == name2, nil
} else if len(args) == 2 {
res, _ := rm.HasLink(name1, name2)
return res, nil
} else {
domain := args[2].(string)
res, _ := rm.HasLink(name1, name2, domain)
return res, nil
}
}
}

34
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import "log"
// EnableLog controls whether to print log to console.
var EnableLog = true
// LogPrint prints the log.
func LogPrint(v ...interface{}) {
if EnableLog {
log.Print(v...)
}
}
// LogPrintf prints the log with the format.
func LogPrintf(format string, v ...interface{}) {
if EnableLog {
log.Printf(format, v...)
}
}

105
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"sort"
"strings"
)
// EscapeAssertion escapes the dots in the assertion, because the expression evaluation doesn't support such variable names.
func EscapeAssertion(s string) string {
s = strings.Replace(s, "r.", "r_", -1)
s = strings.Replace(s, "p.", "p_", -1)
return s
}
// RemoveComments removes the comments starting with # in the text.
func RemoveComments(s string) string {
pos := strings.Index(s, "#")
if pos == -1 {
return s
}
return strings.TrimSpace(s[0:pos])
}
// ArrayEquals determines whether two string arrays are identical.
func ArrayEquals(a []string, b []string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
// Array2DEquals determines whether two 2-dimensional string arrays are identical.
func Array2DEquals(a [][]string, b [][]string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if !ArrayEquals(v, b[i]) {
return false
}
}
return true
}
// ArrayRemoveDuplicates removes any duplicated elements in a string array.
func ArrayRemoveDuplicates(s *[]string) {
found := make(map[string]bool)
j := 0
for i, x := range *s {
if !found[x] {
found[x] = true
(*s)[j] = (*s)[i]
j++
}
}
*s = (*s)[:j]
}
// ArrayToString gets a printable string for a string array.
func ArrayToString(s []string) string {
return strings.Join(s, ", ")
}
// ParamsToString gets a printable string for variable number of parameters.
func ParamsToString(s ...string) string {
return strings.Join(s, ", ")
}
// SetEquals determines whether two string sets are identical.
func SetEquals(a []string, b []string) bool {
if len(a) != len(b) {
return false
}
sort.Strings(a)
sort.Strings(b)
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}

22
vendor/github.com/cloudflare/golz4/.gitignore generated vendored Normal file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe

27
vendor/github.com/cloudflare/golz4/LICENSE generated vendored Normal file
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Copyright (c) 2013 CloudFlare, Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
* Neither the name of the CloudFlare, Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

14
vendor/github.com/cloudflare/golz4/Makefile generated vendored Normal file
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GCFLAGS :=
LDFLAGS :=
.PHONY: install
install:
@go install -v .
.PHONY: test
test:
@go test -gcflags='$(GCFLAGS)' -ldflags='$(LDFLAGS)' .
.PHONY: bench
bench:
@go test -gcflags='$(GCFLAGS)' -ldflags='$(LDFLAGS)' -bench .

4
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golz4
=====
Golang interface to LZ4 compression

4
vendor/github.com/cloudflare/golz4/doc.go generated vendored Normal file
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// Package lz4 implements compression using lz4.c and lz4hc.c
//
// Copyright (c) 2013 CloudFlare, Inc.
package lz4

55
vendor/github.com/cloudflare/golz4/lz4.go generated vendored Normal file
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package lz4
// #cgo CFLAGS: -O3
// #include "src/lz4.h"
// #include "src/lz4.c"
import "C"
import (
"errors"
"fmt"
"unsafe"
)
// p gets a char pointer to the first byte of a []byte slice
func p(in []byte) *C.char {
if len(in) == 0 {
return (*C.char)(unsafe.Pointer(nil))
}
return (*C.char)(unsafe.Pointer(&in[0]))
}
// clen gets the length of a []byte slice as a char *
func clen(s []byte) C.int {
return C.int(len(s))
}
// Uncompress with a known output size. len(out) should be equal to
// the length of the uncompressed out.
func Uncompress(in, out []byte) (error) {
if int(C.LZ4_decompress_safe(p(in), p(out), clen(in), clen(out))) < 0 {
return errors.New("Malformed compression stream")
}
return nil
}
// CompressBound calculates the size of the output buffer needed by
// Compress. This is based on the following macro:
//
// #define LZ4_COMPRESSBOUND(isize)
// ((unsigned int)(isize) > (unsigned int)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
func CompressBound(in []byte) int {
return len(in) + ((len(in) / 255) + 16)
}
// Compress compresses in and puts the content in out. len(out)
// should have enough space for the compressed data (use CompressBound
// to calculate). Returns the number of bytes in the out slice.
func Compress(in, out []byte) (outSize int, err error) {
outSize = int(C.LZ4_compress_limitedOutput(p(in), p(out), clen(in), clen(out)))
if outSize == 0 {
err = fmt.Errorf("insufficient space for compression")
}
return
}

38
vendor/github.com/cloudflare/golz4/lz4_hc.go generated vendored Normal file
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package lz4
// #cgo CFLAGS: -O3
// #include "src/lz4hc.h"
// #include "src/lz4hc.c"
import "C"
import (
"fmt"
)
// CompressHC compresses in and puts the content in out. len(out)
// should have enough space for the compressed data (use CompressBound
// to calculate). Returns the number of bytes in the out slice. Determines
// the compression level automatically.
func CompressHC(in, out []byte) (int, error) {
// 0 automatically sets the compression level.
return CompressHCLevel(in, out, 0)
}
// CompressHCLevel compresses in at the given compression level and puts the
// content in out. len(out) should have enough space for the compressed data
// (use CompressBound to calculate). Returns the number of bytes in the out
// slice. To automatically choose the compression level, use 0. Otherwise, use
// any value in the inclusive range 1 (worst) through 16 (best). Most
// applications will prefer CompressHC.
func CompressHCLevel(in, out []byte, level int) (outSize int, err error) {
// LZ4HC does not handle empty buffers. Pass through to Compress.
if len(in) == 0 || len(out) == 0 {
return Compress(in, out)
}
outSize = int(C.LZ4_compressHC2_limitedOutput(p(in), p(out), clen(in), clen(out), C.int(level)))
if outSize == 0 {
err = fmt.Errorf("insufficient space for compression")
}
return
}

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CANTO I
IN the midway of this our mortal life,
I found me in a gloomy wood, astray
Gone from the path direct: and e'en to tell
It were no easy task, how savage wild
That forest, how robust and rough its growth,
Which to remember only, my dismay
Renews, in bitterness not far from death.
Yet to discourse of what there good befell,
All else will I relate discover'd there.
How first I enter'd it I scarce can say,
Such sleepy dullness in that instant weigh'd
My senses down, when the true path I left,
But when a mountain's foot I reach'd, where clos'd
The valley, that had pierc'd my heart with dread,
I look'd aloft, and saw his shoulders broad
Already vested with that planet's beam,
Who leads all wanderers safe through every way.
Then was a little respite to the fear,
That in my heart's recesses deep had lain,
All of that night, so pitifully pass'd:
And as a man, with difficult short breath,
Forespent with toiling, 'scap'd from sea to shore,
Turns to the perilous wide waste, and stands
At gaze; e'en so my spirit, that yet fail'd
Struggling with terror, turn'd to view the straits,
That none hath pass'd and liv'd. My weary frame
After short pause recomforted, again
I journey'd on over that lonely steep,
The hinder foot still firmer. Scarce the ascent
Began, when, lo! a panther, nimble, light,
And cover'd with a speckled skin, appear'd,
Nor, when it saw me, vanish'd, rather strove
To check my onward going; that ofttimes
With purpose to retrace my steps I turn'd.
The hour was morning's prime, and on his way
Aloft the sun ascended with those stars,
That with him rose, when Love divine first mov'd
Those its fair works: so that with joyous hope
All things conspir'd to fill me, the gay skin
Of that swift animal, the matin dawn
And the sweet season. Soon that joy was chas'd,
And by new dread succeeded, when in view
A lion came, 'gainst me, as it appear'd,
With his head held aloft and hunger-mad,
That e'en the air was fear-struck. A she-wolf
Was at his heels, who in her leanness seem'd
Full of all wants, and many a land hath made
Disconsolate ere now. She with such fear
O'erwhelmed me, at the sight of her appall'd,
That of the height all hope I lost. As one,
Who with his gain elated, sees the time
When all unwares is gone, he inwardly
Mourns with heart-griping anguish; such was I,
Haunted by that fell beast, never at peace,
Who coming o'er against me, by degrees
Impell'd me where the sun in silence rests.
While to the lower space with backward step
I fell, my ken discern'd the form one of one,
Whose voice seem'd faint through long disuse of speech.
When him in that great desert I espied,
"Have mercy on me!" cried I out aloud,
"Spirit! or living man! what e'er thou be!"
He answer'd: "Now not man, man once I was,
And born of Lombard parents, Mantuana both
By country, when the power of Julius yet
Was scarcely firm. At Rome my life was past
Beneath the mild Augustus, in the time
Of fabled deities and false. A bard
Was I, and made Anchises' upright son
The subject of my song, who came from Troy,
When the flames prey'd on Ilium's haughty towers.
But thou, say wherefore to such perils past
Return'st thou? wherefore not this pleasant mount
Ascendest, cause and source of all delight?"
"And art thou then that Virgil, that well-spring,
From which such copious floods of eloquence
Have issued?" I with front abash'd replied.
"Glory and light of all the tuneful train!
May it avail me that I long with zeal
Have sought thy volume, and with love immense
Have conn'd it o'er. My master thou and guide!
Thou he from whom alone I have deriv'd
That style, which for its beauty into fame
Exalts me. See the beast, from whom I fled.
O save me from her, thou illustrious sage!"
"For every vein and pulse throughout my frame
She hath made tremble." He, soon as he saw
That I was weeping, answer'd, "Thou must needs
Another way pursue, if thou wouldst 'scape
From out that savage wilderness. This beast,
At whom thou criest, her way will suffer none
To pass, and no less hindrance makes than death:
So bad and so accursed in her kind,
That never sated is her ravenous will,
Still after food more craving than before.
To many an animal in wedlock vile
She fastens, and shall yet to many more,
Until that greyhound come, who shall destroy
Her with sharp pain. He will not life support
By earth nor its base metals, but by love,
Wisdom, and virtue, and his land shall be
The land 'twixt either Feltro. In his might
Shall safety to Italia's plains arise,
For whose fair realm, Camilla, virgin pure,
Nisus, Euryalus, and Turnus fell.
He with incessant chase through every town
Shall worry, until he to hell at length
Restore her, thence by envy first let loose.
I for thy profit pond'ring now devise,
That thou mayst follow me, and I thy guide
Will lead thee hence through an eternal space,
Where thou shalt hear despairing shrieks, and see
Spirits of old tormented, who invoke
A second death; and those next view, who dwell
Content in fire, for that they hope to come,
Whene'er the time may be, among the blest,
Into whose regions if thou then desire
T' ascend, a spirit worthier then I
Must lead thee, in whose charge, when I depart,
Thou shalt be left: for that Almighty King,
Who reigns above, a rebel to his law,
Adjudges me, and therefore hath decreed,
That to his city none through me should come.
He in all parts hath sway; there rules, there holds
His citadel and throne. O happy those,
Whom there he chooses!" I to him in few:
"Bard! by that God, whom thou didst not adore,
I do beseech thee (that this ill and worse
I may escape) to lead me, where thou saidst,
That I Saint Peter's gate may view, and those
Who as thou tell'st, are in such dismal plight."
Onward he mov'd, I close his steps pursu'd.

14
vendor/github.com/couchbase/go-couchbase/.gitignore generated vendored Normal file
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#*
*.6
*.a
*~
*.swp
/examples/basic/basic
/hello/hello
/populate/populate
/tools/view2go/view2go
/tools/loadfile/loadfile
gotags.files
TAGS
6.out
_*

5
vendor/github.com/couchbase/go-couchbase/.travis.yml generated vendored Normal file
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language: go
install: go get -v -d ./... && go build -v ./...
script: go test -v ./...
go: 1.1.1

19
vendor/github.com/couchbase/go-couchbase/LICENSE generated vendored Normal file
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Copyright (c) 2013 Couchbase, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

37
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# A smart client for couchbase in go
This is a *unoffical* version of a Couchbase Golang client. If you are
looking for the *Offical* Couchbase Golang client please see
[CB-go])[https://github.com/couchbaselabs/gocb].
This is an evolving package, but does provide a useful interface to a
[couchbase](http://www.couchbase.com/) server including all of the
pool/bucket discovery features, compatible key distribution with other
clients, and vbucket motion awareness so application can continue to
operate during rebalances.
It also supports view querying with source node randomization so you
don't bang on all one node to do all the work.
## Install
go get github.com/couchbase/go-couchbase
## Example
c, err := couchbase.Connect("http://dev-couchbase.example.com:8091/")
if err != nil {
log.Fatalf("Error connecting: %v", err)
}
pool, err := c.GetPool("default")
if err != nil {
log.Fatalf("Error getting pool: %v", err)
}
bucket, err := pool.GetBucket("default")
if err != nil {
log.Fatalf("Error getting bucket: %v", err)
}
bucket.Set("someKey", 0, []string{"an", "example", "list"})

32
vendor/github.com/couchbase/go-couchbase/audit.go generated vendored Normal file
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package couchbase
import ()
// Sample data:
// {"disabled":["12333", "22244"],"uid":"132492431","auditdEnabled":true,
// "disabledUsers":[{"name":"bill","domain":"local"},{"name":"bob","domain":"local"}],
// "logPath":"/Users/johanlarson/Library/Application Support/Couchbase/var/lib/couchbase/logs",
// "rotateInterval":86400,"rotateSize":20971520}
type AuditSpec struct {
Disabled []uint32 `json:"disabled"`
Uid string `json:"uid"`
AuditdEnabled bool `json:"auditdEnabled`
DisabledUsers []AuditUser `json:"disabledUsers"`
LogPath string `json:"logPath"`
RotateInterval int64 `json:"rotateInterval"`
RotateSize int64 `json:"rotateSize"`
}
type AuditUser struct {
Name string `json:"name"`
Domain string `json:"domain"`
}
func (c *Client) GetAuditSpec() (*AuditSpec, error) {
ret := &AuditSpec{}
err := c.parseURLResponse("/settings/audit", ret)
if err != nil {
return nil, err
}
return ret, nil
}

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