mirror of
https://github.com/astaxie/beego.git
synced 2024-11-25 22:41:29 +00:00
581 lines
15 KiB
Go
581 lines
15 KiB
Go
// Copyright 2014 beego Author. 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 beego
|
|
|
|
import (
|
|
"path"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/astaxie/beego/context"
|
|
"github.com/astaxie/beego/utils"
|
|
)
|
|
|
|
var (
|
|
allowSuffixExt = []string{".json", ".xml", ".html"}
|
|
)
|
|
|
|
// Tree has three elements: FixRouter/wildcard/leaves
|
|
// fixRouter sotres Fixed Router
|
|
// wildcard stores params
|
|
// leaves store the endpoint information
|
|
type Tree struct {
|
|
//prefix set for static router
|
|
prefix string
|
|
//search fix route first
|
|
fixrouters []*Tree
|
|
//if set, failure to match fixrouters search then search wildcard
|
|
wildcard *Tree
|
|
//if set, failure to match wildcard search
|
|
leaves []*leafInfo
|
|
}
|
|
|
|
// NewTree return a new Tree
|
|
func NewTree() *Tree {
|
|
return &Tree{}
|
|
}
|
|
|
|
// AddTree will add tree to the exist Tree
|
|
// prefix should has no params
|
|
func (t *Tree) AddTree(prefix string, tree *Tree) {
|
|
t.addtree(splitPath(prefix), tree, nil, "")
|
|
}
|
|
|
|
func (t *Tree) addtree(segments []string, tree *Tree, wildcards []string, reg string) {
|
|
if len(segments) == 0 {
|
|
panic("prefix should has path")
|
|
}
|
|
seg := segments[0]
|
|
iswild, params, regexpStr := splitSegment(seg)
|
|
// if it's ? meaning can igone this, so add one more rule for it
|
|
if len(params) > 0 && params[0] == ":" {
|
|
params = params[1:]
|
|
if len(segments[1:]) > 0 {
|
|
t.addtree(segments[1:], tree, append(wildcards, params...), reg)
|
|
} else {
|
|
filterTreeWithPrefix(tree, wildcards, reg)
|
|
}
|
|
}
|
|
//Rule: /login/*/access match /login/2009/11/access
|
|
//if already has *, and when loop the access, should as a regexpStr
|
|
if !iswild && utils.InSlice(":splat", wildcards) {
|
|
iswild = true
|
|
regexpStr = seg
|
|
}
|
|
//Rule: /user/:id/*
|
|
if seg == "*" && len(wildcards) > 0 && reg == "" {
|
|
regexpStr = "(.+)"
|
|
}
|
|
if len(segments) == 1 {
|
|
if iswild {
|
|
if regexpStr != "" {
|
|
if reg == "" {
|
|
rr := ""
|
|
for _, w := range wildcards {
|
|
if w == ":splat" {
|
|
rr = rr + "(.+)/"
|
|
} else {
|
|
rr = rr + "([^/]+)/"
|
|
}
|
|
}
|
|
regexpStr = rr + regexpStr
|
|
} else {
|
|
regexpStr = "/" + regexpStr
|
|
}
|
|
} else if reg != "" {
|
|
if seg == "*.*" {
|
|
regexpStr = "([^.]+).(.+)"
|
|
} else {
|
|
for _, w := range params {
|
|
if w == "." || w == ":" {
|
|
continue
|
|
}
|
|
regexpStr = "([^/]+)/" + regexpStr
|
|
}
|
|
}
|
|
}
|
|
reg = strings.Trim(reg+"/"+regexpStr, "/")
|
|
filterTreeWithPrefix(tree, append(wildcards, params...), reg)
|
|
t.wildcard = tree
|
|
} else {
|
|
reg = strings.Trim(reg+"/"+regexpStr, "/")
|
|
filterTreeWithPrefix(tree, append(wildcards, params...), reg)
|
|
tree.prefix = seg
|
|
t.fixrouters = append(t.fixrouters, tree)
|
|
}
|
|
return
|
|
}
|
|
|
|
if iswild {
|
|
if t.wildcard == nil {
|
|
t.wildcard = NewTree()
|
|
}
|
|
if regexpStr != "" {
|
|
if reg == "" {
|
|
rr := ""
|
|
for _, w := range wildcards {
|
|
if w == ":splat" {
|
|
rr = rr + "(.+)/"
|
|
} else {
|
|
rr = rr + "([^/]+)/"
|
|
}
|
|
}
|
|
regexpStr = rr + regexpStr
|
|
} else {
|
|
regexpStr = "/" + regexpStr
|
|
}
|
|
} else if reg != "" {
|
|
if seg == "*.*" {
|
|
regexpStr = "([^.]+).(.+)"
|
|
params = params[1:]
|
|
} else {
|
|
for _ = range params {
|
|
regexpStr = "([^/]+)/" + regexpStr
|
|
}
|
|
}
|
|
} else {
|
|
if seg == "*.*" {
|
|
params = params[1:]
|
|
}
|
|
}
|
|
reg = strings.TrimRight(strings.TrimRight(reg, "/")+"/"+regexpStr, "/")
|
|
t.wildcard.addtree(segments[1:], tree, append(wildcards, params...), reg)
|
|
} else {
|
|
subTree := NewTree()
|
|
subTree.prefix = seg
|
|
t.fixrouters = append(t.fixrouters, subTree)
|
|
subTree.addtree(segments[1:], tree, append(wildcards, params...), reg)
|
|
}
|
|
}
|
|
|
|
func filterTreeWithPrefix(t *Tree, wildcards []string, reg string) {
|
|
for _, v := range t.fixrouters {
|
|
filterTreeWithPrefix(v, wildcards, reg)
|
|
}
|
|
if t.wildcard != nil {
|
|
filterTreeWithPrefix(t.wildcard, wildcards, reg)
|
|
}
|
|
for _, l := range t.leaves {
|
|
if reg != "" {
|
|
if l.regexps != nil {
|
|
l.wildcards = append(wildcards, l.wildcards...)
|
|
l.regexps = regexp.MustCompile("^" + reg + "/" + strings.Trim(l.regexps.String(), "^$") + "$")
|
|
} else {
|
|
for _, v := range l.wildcards {
|
|
if v == ":splat" {
|
|
reg = reg + "/(.+)"
|
|
} else {
|
|
reg = reg + "/([^/]+)"
|
|
}
|
|
}
|
|
l.regexps = regexp.MustCompile("^" + reg + "$")
|
|
l.wildcards = append(wildcards, l.wildcards...)
|
|
}
|
|
} else {
|
|
l.wildcards = append(wildcards, l.wildcards...)
|
|
if l.regexps != nil {
|
|
for _, w := range wildcards {
|
|
if w == ":splat" {
|
|
reg = "(.+)/" + reg
|
|
} else {
|
|
reg = "([^/]+)/" + reg
|
|
}
|
|
}
|
|
l.regexps = regexp.MustCompile("^" + reg + strings.Trim(l.regexps.String(), "^$") + "$")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// AddRouter call addseg function
|
|
func (t *Tree) AddRouter(pattern string, runObject interface{}) {
|
|
t.addseg(splitPath(pattern), runObject, nil, "")
|
|
}
|
|
|
|
// "/"
|
|
// "admin" ->
|
|
func (t *Tree) addseg(segments []string, route interface{}, wildcards []string, reg string) {
|
|
if len(segments) == 0 {
|
|
if reg != "" {
|
|
t.leaves = append(t.leaves, &leafInfo{runObject: route, wildcards: wildcards, regexps: regexp.MustCompile("^" + reg + "$")})
|
|
} else {
|
|
t.leaves = append(t.leaves, &leafInfo{runObject: route, wildcards: wildcards})
|
|
}
|
|
} else {
|
|
seg := segments[0]
|
|
iswild, params, regexpStr := splitSegment(seg)
|
|
// if it's ? meaning can igone this, so add one more rule for it
|
|
if len(params) > 0 && params[0] == ":" {
|
|
t.addseg(segments[1:], route, wildcards, reg)
|
|
params = params[1:]
|
|
}
|
|
//Rule: /login/*/access match /login/2009/11/access
|
|
//if already has *, and when loop the access, should as a regexpStr
|
|
if !iswild && utils.InSlice(":splat", wildcards) {
|
|
iswild = true
|
|
regexpStr = seg
|
|
}
|
|
//Rule: /user/:id/*
|
|
if seg == "*" && len(wildcards) > 0 && reg == "" {
|
|
regexpStr = "(.+)"
|
|
}
|
|
if iswild {
|
|
if t.wildcard == nil {
|
|
t.wildcard = NewTree()
|
|
}
|
|
if regexpStr != "" {
|
|
if reg == "" {
|
|
rr := ""
|
|
for _, w := range wildcards {
|
|
if w == ":splat" {
|
|
rr = rr + "(.+)/"
|
|
} else {
|
|
rr = rr + "([^/]+)/"
|
|
}
|
|
}
|
|
regexpStr = rr + regexpStr
|
|
} else {
|
|
regexpStr = "/" + regexpStr
|
|
}
|
|
} else if reg != "" {
|
|
if seg == "*.*" {
|
|
regexpStr = "/([^.]+).(.+)"
|
|
params = params[1:]
|
|
} else {
|
|
for _ = range params {
|
|
regexpStr = "/([^/]+)" + regexpStr
|
|
}
|
|
}
|
|
} else {
|
|
if seg == "*.*" {
|
|
params = params[1:]
|
|
}
|
|
}
|
|
t.wildcard.addseg(segments[1:], route, append(wildcards, params...), reg+regexpStr)
|
|
} else {
|
|
var subTree *Tree
|
|
for _, sub := range t.fixrouters {
|
|
if sub.prefix == seg {
|
|
subTree = sub
|
|
break
|
|
}
|
|
}
|
|
if subTree == nil {
|
|
subTree = NewTree()
|
|
subTree.prefix = seg
|
|
t.fixrouters = append(t.fixrouters, subTree)
|
|
}
|
|
subTree.addseg(segments[1:], route, wildcards, reg)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Match router to runObject & params
|
|
func (t *Tree) Match(pattern string, ctx *context.Context) (runObject interface{}) {
|
|
if len(pattern) == 0 || pattern[0] != '/' {
|
|
return nil
|
|
}
|
|
w := make([]string, 0, 20)
|
|
return t.match(pattern, w, ctx)
|
|
}
|
|
|
|
func (t *Tree) match(pattern string, wildcardValues []string, ctx *context.Context) (runObject interface{}) {
|
|
if len(pattern) > 0 {
|
|
i := 0
|
|
for ; i < len(pattern) && pattern[i] == '/'; i++ {
|
|
}
|
|
pattern = pattern[i:]
|
|
}
|
|
// Handle leaf nodes:
|
|
if len(pattern) == 0 {
|
|
for _, l := range t.leaves {
|
|
if ok := l.match(wildcardValues, ctx); ok {
|
|
return l.runObject
|
|
}
|
|
}
|
|
if t.wildcard != nil {
|
|
for _, l := range t.wildcard.leaves {
|
|
if ok := l.match(wildcardValues, ctx); ok {
|
|
return l.runObject
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
var seg string
|
|
i, l := 0, len(pattern)
|
|
for ; i < l && pattern[i] != '/'; i++ {
|
|
}
|
|
if i == 0 {
|
|
seg = pattern
|
|
pattern = ""
|
|
} else {
|
|
seg = pattern[:i]
|
|
pattern = pattern[i:]
|
|
}
|
|
for _, subTree := range t.fixrouters {
|
|
if subTree.prefix == seg {
|
|
runObject = subTree.match(pattern, wildcardValues, ctx)
|
|
if runObject != nil {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if runObject == nil && len(t.fixrouters) > 0 {
|
|
// Filter the .json .xml .html extension
|
|
for _, str := range allowSuffixExt {
|
|
if strings.HasSuffix(seg, str) {
|
|
for _, subTree := range t.fixrouters {
|
|
if subTree.prefix == seg[:len(seg)-len(str)] {
|
|
runObject = subTree.match(pattern, wildcardValues, ctx)
|
|
if runObject != nil {
|
|
ctx.Input.SetParam(":ext", str[1:])
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if runObject == nil && t.wildcard != nil {
|
|
runObject = t.wildcard.match(pattern, append(wildcardValues, seg), ctx)
|
|
}
|
|
|
|
if runObject == nil && len(t.leaves) > 0 {
|
|
wildcardValues = append(wildcardValues, seg)
|
|
start, i := 0, 0
|
|
for ; i < len(pattern); i++ {
|
|
if pattern[i] == '/' {
|
|
if i != 0 && start < len(pattern) {
|
|
wildcardValues = append(wildcardValues, pattern[start:i])
|
|
}
|
|
start = i + 1
|
|
continue
|
|
}
|
|
}
|
|
if start > 0 {
|
|
wildcardValues = append(wildcardValues, pattern[start:i])
|
|
}
|
|
for _, l := range t.leaves {
|
|
if ok := l.match(wildcardValues, ctx); ok {
|
|
return l.runObject
|
|
}
|
|
}
|
|
}
|
|
return runObject
|
|
}
|
|
|
|
type leafInfo struct {
|
|
// names of wildcards that lead to this leaf. eg, ["id" "name"] for the wildcard ":id" and ":name"
|
|
wildcards []string
|
|
|
|
// if the leaf is regexp
|
|
regexps *regexp.Regexp
|
|
|
|
runObject interface{}
|
|
}
|
|
|
|
func (leaf *leafInfo) match(wildcardValues []string, ctx *context.Context) (ok bool) {
|
|
//fmt.Println("Leaf:", wildcardValues, leaf.wildcards, leaf.regexps)
|
|
if leaf.regexps == nil {
|
|
if len(wildcardValues) == 0 { // static path
|
|
return true
|
|
}
|
|
// match *
|
|
if len(leaf.wildcards) == 1 && leaf.wildcards[0] == ":splat" {
|
|
ctx.Input.SetParam(":splat", path.Join(wildcardValues...))
|
|
return true
|
|
}
|
|
// match *.* or :id
|
|
if len(leaf.wildcards) >= 2 && leaf.wildcards[len(leaf.wildcards)-2] == ":path" && leaf.wildcards[len(leaf.wildcards)-1] == ":ext" {
|
|
if len(leaf.wildcards) == 2 {
|
|
lastone := wildcardValues[len(wildcardValues)-1]
|
|
strs := strings.SplitN(lastone, ".", 2)
|
|
if len(strs) == 2 {
|
|
ctx.Input.SetParam(":ext", strs[1])
|
|
}
|
|
ctx.Input.SetParam(":path", path.Join(path.Join(wildcardValues[:len(wildcardValues)-1]...), strs[0]))
|
|
return true
|
|
} else if len(wildcardValues) < 2 {
|
|
return false
|
|
}
|
|
var index int
|
|
for index = 0; index < len(leaf.wildcards)-2; index++ {
|
|
ctx.Input.SetParam(leaf.wildcards[index], wildcardValues[index])
|
|
}
|
|
lastone := wildcardValues[len(wildcardValues)-1]
|
|
strs := strings.SplitN(lastone, ".", 2)
|
|
if len(strs) == 2 {
|
|
ctx.Input.SetParam(":ext", strs[1])
|
|
}
|
|
if index > (len(wildcardValues) - 1) {
|
|
ctx.Input.SetParam(":path", "")
|
|
} else {
|
|
ctx.Input.SetParam(":path", path.Join(path.Join(wildcardValues[index:len(wildcardValues)-1]...), strs[0]))
|
|
}
|
|
return true
|
|
}
|
|
// match :id
|
|
if len(leaf.wildcards) != len(wildcardValues) {
|
|
return false
|
|
}
|
|
for j, v := range leaf.wildcards {
|
|
ctx.Input.SetParam(v, wildcardValues[j])
|
|
}
|
|
return true
|
|
}
|
|
|
|
if !leaf.regexps.MatchString(path.Join(wildcardValues...)) {
|
|
return false
|
|
}
|
|
matches := leaf.regexps.FindStringSubmatch(path.Join(wildcardValues...))
|
|
for i, match := range matches[1:] {
|
|
if i < len(leaf.wildcards) {
|
|
ctx.Input.SetParam(leaf.wildcards[i], match)
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// "/" -> []
|
|
// "/admin" -> ["admin"]
|
|
// "/admin/" -> ["admin"]
|
|
// "/admin/users" -> ["admin", "users"]
|
|
func splitPath(key string) []string {
|
|
key = strings.Trim(key, "/ ")
|
|
if key == "" {
|
|
return []string{}
|
|
}
|
|
return strings.Split(key, "/")
|
|
}
|
|
|
|
// "admin" -> false, nil, ""
|
|
// ":id" -> true, [:id], ""
|
|
// "?:id" -> true, [: :id], "" : meaning can empty
|
|
// ":id:int" -> true, [:id], ([0-9]+)
|
|
// ":name:string" -> true, [:name], ([\w]+)
|
|
// ":id([0-9]+)" -> true, [:id], ([0-9]+)
|
|
// ":id([0-9]+)_:name" -> true, [:id :name], ([0-9]+)_(.+)
|
|
// "cms_:id_:page.html" -> true, [:id_ :page], cms_(.+)(.+).html
|
|
// "cms_:id(.+)_:page.html" -> true, [:id :page], cms_(.+)_(.+).html
|
|
// "*" -> true, [:splat], ""
|
|
// "*.*" -> true,[. :path :ext], "" . meaning separator
|
|
func splitSegment(key string) (bool, []string, string) {
|
|
if strings.HasPrefix(key, "*") {
|
|
if key == "*.*" {
|
|
return true, []string{".", ":path", ":ext"}, ""
|
|
}
|
|
return true, []string{":splat"}, ""
|
|
}
|
|
if strings.ContainsAny(key, ":") {
|
|
var paramsNum int
|
|
var out []rune
|
|
var start bool
|
|
var startexp bool
|
|
var param []rune
|
|
var expt []rune
|
|
var skipnum int
|
|
params := []string{}
|
|
reg := regexp.MustCompile(`[a-zA-Z0-9_]+`)
|
|
for i, v := range key {
|
|
if skipnum > 0 {
|
|
skipnum--
|
|
continue
|
|
}
|
|
if start {
|
|
//:id:int and :name:string
|
|
if v == ':' {
|
|
if len(key) >= i+4 {
|
|
if key[i+1:i+4] == "int" {
|
|
out = append(out, []rune("([0-9]+)")...)
|
|
params = append(params, ":"+string(param))
|
|
start = false
|
|
startexp = false
|
|
skipnum = 3
|
|
param = make([]rune, 0)
|
|
paramsNum++
|
|
continue
|
|
}
|
|
}
|
|
if len(key) >= i+7 {
|
|
if key[i+1:i+7] == "string" {
|
|
out = append(out, []rune(`([\w]+)`)...)
|
|
params = append(params, ":"+string(param))
|
|
paramsNum++
|
|
start = false
|
|
startexp = false
|
|
skipnum = 6
|
|
param = make([]rune, 0)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
// params only support a-zA-Z0-9
|
|
if reg.MatchString(string(v)) {
|
|
param = append(param, v)
|
|
continue
|
|
}
|
|
if v != '(' {
|
|
out = append(out, []rune(`(.+)`)...)
|
|
params = append(params, ":"+string(param))
|
|
param = make([]rune, 0)
|
|
paramsNum++
|
|
start = false
|
|
startexp = false
|
|
}
|
|
}
|
|
if startexp {
|
|
if v != ')' {
|
|
expt = append(expt, v)
|
|
continue
|
|
}
|
|
}
|
|
// Escape Sequence '\'
|
|
if i > 0 && key[i-1] == '\\' {
|
|
out = append(out, v)
|
|
} else if v == ':' {
|
|
param = make([]rune, 0)
|
|
start = true
|
|
} else if v == '(' {
|
|
startexp = true
|
|
start = false
|
|
if len(param) > 0 {
|
|
params = append(params, ":"+string(param))
|
|
param = make([]rune, 0)
|
|
}
|
|
paramsNum++
|
|
expt = make([]rune, 0)
|
|
expt = append(expt, '(')
|
|
} else if v == ')' {
|
|
startexp = false
|
|
expt = append(expt, ')')
|
|
out = append(out, expt...)
|
|
param = make([]rune, 0)
|
|
} else if v == '?' {
|
|
params = append(params, ":")
|
|
} else {
|
|
out = append(out, v)
|
|
}
|
|
}
|
|
if len(param) > 0 {
|
|
if paramsNum > 0 {
|
|
out = append(out, []rune(`(.+)`)...)
|
|
}
|
|
params = append(params, ":"+string(param))
|
|
}
|
|
return true, params, string(out)
|
|
}
|
|
return false, nil, ""
|
|
}
|