mirror of
https://github.com/astaxie/beego.git
synced 2024-11-22 20:00:54 +00:00
850 lines
22 KiB
Go
850 lines
22 KiB
Go
package beego
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import (
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"fmt"
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"net/http"
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"net/url"
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"os"
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"reflect"
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"regexp"
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"runtime"
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"strconv"
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"strings"
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"time"
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beecontext "github.com/astaxie/beego/context"
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"github.com/astaxie/beego/middleware"
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"github.com/astaxie/beego/toolbox"
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"github.com/astaxie/beego/utils"
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)
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const (
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BeforeRouter = iota
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AfterStatic
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BeforeExec
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AfterExec
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FinishRouter
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)
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var (
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HTTPMETHOD = []string{"get", "post", "put", "delete", "patch", "options", "head"}
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)
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type controllerInfo struct {
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pattern string
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regex *regexp.Regexp
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params map[int]string
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controllerType reflect.Type
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methods map[string]string
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hasMethod bool
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}
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type ControllerRegistor struct {
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routers []*controllerInfo // regexp router storage
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fixrouters []*controllerInfo // fixed router storage
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enableFilter bool
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filters map[int][]*FilterRouter
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enableAuto bool
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autoRouter map[string]map[string]reflect.Type //key:controller key:method value:reflect.type
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contextBuffer chan *beecontext.Context //context buffer pool
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}
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func NewControllerRegistor() *ControllerRegistor {
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return &ControllerRegistor{
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routers: make([]*controllerInfo, 0),
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autoRouter: make(map[string]map[string]reflect.Type),
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filters: make(map[int][]*FilterRouter),
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contextBuffer: make(chan *beecontext.Context, 1000),
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}
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}
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//methods support like this:
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//default methods is the same name as method
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//Add("/user",&UserController{})
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//Add("/api/list",&RestController{},"*:ListFood")
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//Add("/api/create",&RestController{},"post:CreateFood")
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//Add("/api/update",&RestController{},"put:UpdateFood")
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//Add("/api/delete",&RestController{},"delete:DeleteFood")
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//Add("/api",&RestController{},"get,post:ApiFunc")
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//Add("/simple",&SimpleController{},"get:GetFunc;post:PostFunc")
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func (p *ControllerRegistor) Add(pattern string, c ControllerInterface, mappingMethods ...string) {
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parts := strings.Split(pattern, "/")
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j := 0
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params := make(map[int]string)
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for i, part := range parts {
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if strings.HasPrefix(part, ":") {
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expr := "(.+)"
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//a user may choose to override the defult expression
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// similar to expressjs: ‘/user/:id([0-9]+)’
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if index := strings.Index(part, "("); index != -1 {
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expr = part[index:]
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part = part[:index]
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//match /user/:id:int ([0-9]+)
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//match /post/:username:string ([\w]+)
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} else if lindex := strings.LastIndex(part, ":"); lindex != 0 {
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switch part[lindex:] {
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case ":int":
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expr = "([0-9]+)"
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part = part[:lindex]
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case ":string":
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expr = `([\w]+)`
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part = part[:lindex]
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}
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}
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params[j] = part
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parts[i] = expr
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j++
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}
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if strings.HasPrefix(part, "*") {
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expr := "(.+)"
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if part == "*.*" {
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params[j] = ":path"
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parts[i] = "([^.]+).([^.]+)"
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j++
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params[j] = ":ext"
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j++
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} else {
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params[j] = ":splat"
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parts[i] = expr
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j++
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}
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}
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//url like someprefix:id(xxx).html
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if strings.Contains(part, ":") && strings.Contains(part, "(") && strings.Contains(part, ")") {
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var out []rune
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var start bool
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var startexp bool
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var param []rune
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var expt []rune
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for _, v := range part {
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if start {
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if v != '(' {
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param = append(param, v)
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continue
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}
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}
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if startexp {
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if v != ')' {
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expt = append(expt, v)
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continue
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}
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}
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if v == ':' {
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param = make([]rune, 0)
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param = append(param, ':')
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start = true
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} else if v == '(' {
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startexp = true
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start = false
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params[j] = string(param)
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j++
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expt = make([]rune, 0)
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expt = append(expt, '(')
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} else if v == ')' {
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startexp = false
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expt = append(expt, ')')
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out = append(out, expt...)
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} else {
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out = append(out, v)
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}
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}
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parts[i] = string(out)
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}
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}
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reflectVal := reflect.ValueOf(c)
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t := reflect.Indirect(reflectVal).Type()
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methods := make(map[string]string)
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if len(mappingMethods) > 0 {
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semi := strings.Split(mappingMethods[0], ";")
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for _, v := range semi {
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colon := strings.Split(v, ":")
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if len(colon) != 2 {
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panic("method mapping format is invalid")
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}
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comma := strings.Split(colon[0], ",")
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for _, m := range comma {
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if m == "*" || utils.InSlice(strings.ToLower(m), HTTPMETHOD) {
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if val := reflectVal.MethodByName(colon[1]); val.IsValid() {
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methods[strings.ToLower(m)] = colon[1]
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} else {
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panic(colon[1] + " method doesn't exist in the controller " + t.Name())
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}
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} else {
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panic(v + " is an invalid method mapping. Method doesn't exist " + m)
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}
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}
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}
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}
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if j == 0 {
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//now create the Route
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route := &controllerInfo{}
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route.pattern = pattern
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route.controllerType = t
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route.methods = methods
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if len(methods) > 0 {
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route.hasMethod = true
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}
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p.fixrouters = append(p.fixrouters, route)
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} else { // add regexp routers
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//recreate the url pattern, with parameters replaced
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//by regular expressions. then compile the regex
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pattern = strings.Join(parts, "/")
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regex, regexErr := regexp.Compile(pattern)
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if regexErr != nil {
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//TODO add error handling here to avoid panic
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panic(regexErr)
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return
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}
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//now create the Route
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route := &controllerInfo{}
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route.regex = regex
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route.params = params
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route.pattern = pattern
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route.methods = methods
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if len(methods) > 0 {
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route.hasMethod = true
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}
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route.controllerType = t
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p.routers = append(p.routers, route)
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}
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}
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// add auto router to controller
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// example beego.AddAuto(&MainContorlller{})
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// MainController has method List and Page
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// you can visit the url /main/list to exec List function
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// /main/page to exec Page function
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func (p *ControllerRegistor) AddAuto(c ControllerInterface) {
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p.enableAuto = true
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reflectVal := reflect.ValueOf(c)
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rt := reflectVal.Type()
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ct := reflect.Indirect(reflectVal).Type()
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firstParam := strings.ToLower(strings.TrimSuffix(ct.Name(), "Controller"))
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if _, ok := p.autoRouter[firstParam]; ok {
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return
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} else {
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p.autoRouter[firstParam] = make(map[string]reflect.Type)
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}
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for i := 0; i < rt.NumMethod(); i++ {
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p.autoRouter[firstParam][rt.Method(i).Name] = ct
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}
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}
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func (p *ControllerRegistor) AddFilter(pattern, action string, filter FilterFunc) {
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mr := buildFilter(pattern, filter)
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switch action {
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case "BeforeRouter":
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p.filters[BeforeRouter] = append(p.filters[BeforeRouter], mr)
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case "AfterStatic":
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p.filters[AfterStatic] = append(p.filters[AfterStatic], mr)
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case "BeforeExec":
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p.filters[BeforeExec] = append(p.filters[BeforeExec], mr)
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case "AfterExec":
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p.filters[AfterExec] = append(p.filters[AfterExec], mr)
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case "FinishRouter":
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p.filters[FinishRouter] = append(p.filters[FinishRouter], mr)
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}
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p.enableFilter = true
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}
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func (p *ControllerRegistor) InsertFilter(pattern string, pos int, filter FilterFunc) {
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mr := buildFilter(pattern, filter)
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p.filters[pos] = append(p.filters[pos], mr)
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p.enableFilter = true
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}
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func (p *ControllerRegistor) UrlFor(endpoint string, values ...string) string {
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paths := strings.Split(endpoint, ".")
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if len(paths) <= 1 {
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Warn("urlfor endpoint must like path.controller.method")
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return ""
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}
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if len(values)%2 != 0 {
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Warn("urlfor params must key-value pair")
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return ""
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}
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urlv := url.Values{}
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if len(values) > 0 {
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key := ""
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for k, v := range values {
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if k%2 == 0 {
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key = v
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} else {
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urlv.Set(key, v)
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}
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}
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}
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controllName := strings.Join(paths[:len(paths)-1], ".")
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methodName := paths[len(paths)-1]
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for _, route := range p.fixrouters {
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if route.controllerType.Name() == controllName {
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var finded bool
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if utils.InSlice(strings.ToLower(methodName), HTTPMETHOD) {
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if route.hasMethod {
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if m, ok := route.methods[strings.ToLower(methodName)]; ok && m != methodName {
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finded = false
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} else if m, ok = route.methods["*"]; ok && m != methodName {
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finded = false
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} else {
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finded = true
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}
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} else {
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finded = true
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}
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} else if route.hasMethod {
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for _, md := range route.methods {
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if md == methodName {
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finded = true
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}
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}
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}
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if !finded {
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continue
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}
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if len(values) > 0 {
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return route.pattern + "?" + urlv.Encode()
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}
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return route.pattern
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}
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}
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for _, route := range p.routers {
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if route.controllerType.Name() == controllName {
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var finded bool
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if utils.InSlice(strings.ToLower(methodName), HTTPMETHOD) {
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if route.hasMethod {
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if m, ok := route.methods[strings.ToLower(methodName)]; ok && m != methodName {
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finded = false
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} else if m, ok = route.methods["*"]; ok && m != methodName {
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finded = false
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} else {
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finded = true
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}
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} else {
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finded = true
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}
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} else if route.hasMethod {
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for _, md := range route.methods {
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if md == methodName {
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finded = true
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}
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}
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}
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if !finded {
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continue
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}
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var returnurl string
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var i int
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var startreg bool
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for _, v := range route.regex.String() {
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if v == '(' {
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startreg = true
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continue
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} else if v == ')' {
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startreg = false
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returnurl = returnurl + urlv.Get(route.params[i])
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i++
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} else if !startreg {
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returnurl = string(append([]rune(returnurl), v))
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}
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}
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if route.regex.MatchString(returnurl) {
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return returnurl
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}
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}
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}
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if p.enableAuto {
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for cName, methodList := range p.autoRouter {
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if strings.ToLower(strings.TrimSuffix(paths[len(paths)-2], "Controller")) == cName {
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if _, ok := methodList[methodName]; ok {
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if len(values) > 0 {
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return "/" + strings.TrimSuffix(paths[len(paths)-2], "Controller") + "/" + methodName + "?" + urlv.Encode()
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} else {
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return "/" + strings.TrimSuffix(paths[len(paths)-2], "Controller") + "/" + methodName
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}
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}
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}
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}
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}
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return ""
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}
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// main function to serveHTTP
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func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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defer func() {
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if err := recover(); err != nil {
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if err == USERSTOPRUN {
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return
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}
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if _, ok := err.(middleware.HTTPException); ok {
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// catch intented errors, only for HTTP 4XX and 5XX
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} else {
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if RunMode == "dev" {
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if !RecoverPanic {
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panic(err)
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} else {
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if ErrorsShow {
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if handler, ok := middleware.ErrorMaps[fmt.Sprint(err)]; ok {
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handler(rw, r)
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return
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}
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}
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var stack string
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Critical("Handler crashed with error", err)
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for i := 1; ; i++ {
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_, file, line, ok := runtime.Caller(i)
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if !ok {
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break
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}
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Critical(file, line)
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stack = stack + fmt.Sprintln(file, line)
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}
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middleware.ShowErr(err, rw, r, stack)
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}
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} else {
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if !RecoverPanic {
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panic(err)
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} else {
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// in production model show all infomation
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if ErrorsShow {
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handler := p.getErrorHandler(fmt.Sprint(err))
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handler(rw, r)
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return
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} else {
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Critical("Handler crashed with error", err)
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for i := 1; ; i++ {
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_, file, line, ok := runtime.Caller(i)
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if !ok {
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break
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}
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Critical(file, line)
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}
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}
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}
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}
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}
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}
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}()
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starttime := time.Now()
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requestPath := r.URL.Path
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var runrouter reflect.Type
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var findrouter bool
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var runMethod string
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params := make(map[string]string)
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w := &responseWriter{writer: rw}
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w.Header().Set("Server", BeegoServerName)
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// init context
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var context *beecontext.Context
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select {
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case context = <-p.contextBuffer:
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context.ResponseWriter = w
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context.Request = r
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context.Input.Request = r
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default:
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context = &beecontext.Context{
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ResponseWriter: w,
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Request: r,
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Input: beecontext.NewInput(r),
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Output: beecontext.NewOutput(),
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}
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context.Output.Context = context
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context.Output.EnableGzip = EnableGzip
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}
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defer func() {
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if context != nil {
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select {
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case p.contextBuffer <- context:
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default:
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}
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}
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}()
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if context.Input.IsWebsocket() {
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context.ResponseWriter = rw
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}
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// defined filter function
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do_filter := func(pos int) (started bool) {
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if p.enableFilter {
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if l, ok := p.filters[pos]; ok {
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for _, filterR := range l {
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if ok, p := filterR.ValidRouter(r.URL.Path); ok {
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context.Input.Params = p
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filterR.filterFunc(context)
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if w.started {
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return true
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}
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}
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}
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}
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}
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return false
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}
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// session init
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if SessionOn {
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context.Input.CruSession = GlobalSessions.SessionStart(w, r)
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defer context.Input.CruSession.SessionRelease()
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}
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if !utils.InSlice(strings.ToLower(r.Method), HTTPMETHOD) {
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http.Error(w, "Method Not Allowed", 405)
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goto Admin
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}
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if do_filter(BeforeRouter) {
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goto Admin
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}
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//static file server
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for prefix, staticDir := range StaticDir {
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if r.URL.Path == "/favicon.ico" {
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file := staticDir + r.URL.Path
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http.ServeFile(w, r, file)
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w.started = true
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goto Admin
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}
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if strings.HasPrefix(r.URL.Path, prefix) {
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file := staticDir + r.URL.Path[len(prefix):]
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finfo, err := os.Stat(file)
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if err != nil {
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if RunMode == "dev" {
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Warn(err)
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}
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http.NotFound(w, r)
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goto Admin
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}
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//if the request is dir and DirectoryIndex is false then
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if finfo.IsDir() && !DirectoryIndex {
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middleware.Exception("403", rw, r, "403 Forbidden")
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goto Admin
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}
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//This block obtained from (https://github.com/smithfox/beego) - it should probably get merged into astaxie/beego after a pull request
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isStaticFileToCompress := false
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if StaticExtensionsToGzip != nil && len(StaticExtensionsToGzip) > 0 {
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for _, statExtension := range StaticExtensionsToGzip {
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if strings.HasSuffix(strings.ToLower(file), strings.ToLower(statExtension)) {
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isStaticFileToCompress = true
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break
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}
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}
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}
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if isStaticFileToCompress {
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if EnableGzip {
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w.contentEncoding = GetAcceptEncodingZip(r)
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}
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memzipfile, err := OpenMemZipFile(file, w.contentEncoding)
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if err != nil {
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return
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}
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w.InitHeadContent(finfo.Size())
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http.ServeContent(w, r, file, finfo.ModTime(), memzipfile)
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} else {
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http.ServeFile(w, r, file)
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}
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||
w.started = true
|
||
goto Admin
|
||
}
|
||
}
|
||
|
||
if do_filter(AfterStatic) {
|
||
goto Admin
|
||
}
|
||
|
||
if CopyRequestBody {
|
||
context.Input.Body()
|
||
}
|
||
|
||
//first find path from the fixrouters to Improve Performance
|
||
for _, route := range p.fixrouters {
|
||
n := len(requestPath)
|
||
if requestPath == route.pattern {
|
||
runrouter = route.controllerType
|
||
findrouter = true
|
||
runMethod = p.getRunMethod(r.Method, context, route)
|
||
break
|
||
}
|
||
// pattern /admin url /admin 200 /admin/ 404
|
||
// pattern /admin/ url /admin 301 /admin/ 200
|
||
if requestPath[n-1] != '/' && len(route.pattern) == n+1 &&
|
||
route.pattern[n] == '/' && route.pattern[:n] == requestPath {
|
||
http.Redirect(w, r, requestPath+"/", 301)
|
||
goto Admin
|
||
}
|
||
}
|
||
|
||
//find regex's router
|
||
if !findrouter {
|
||
//find a matching Route
|
||
for _, route := range p.routers {
|
||
|
||
//check if Route pattern matches url
|
||
if !route.regex.MatchString(requestPath) {
|
||
continue
|
||
}
|
||
|
||
//get submatches (params)
|
||
matches := route.regex.FindStringSubmatch(requestPath)
|
||
|
||
//double check that the Route matches the URL pattern.
|
||
if len(matches[0]) != len(requestPath) {
|
||
continue
|
||
}
|
||
|
||
if len(route.params) > 0 {
|
||
//add url parameters to the query param map
|
||
values := r.URL.Query()
|
||
for i, match := range matches[1:] {
|
||
values.Add(route.params[i], match)
|
||
params[route.params[i]] = match
|
||
}
|
||
//reassemble query params and add to RawQuery
|
||
r.URL.RawQuery = url.Values(values).Encode()
|
||
}
|
||
runrouter = route.controllerType
|
||
findrouter = true
|
||
context.Input.Params = params
|
||
runMethod = p.getRunMethod(r.Method, context, route)
|
||
break
|
||
}
|
||
}
|
||
|
||
if !findrouter && p.enableAuto {
|
||
// deal with url with diffirent ext
|
||
// /controller/simple
|
||
// /controller/simple.html
|
||
// /controller/simple.json
|
||
// /controller/simple.rss
|
||
lastindex := strings.LastIndex(requestPath, "/")
|
||
lastsub := requestPath[lastindex+1:]
|
||
if subindex := strings.LastIndex(lastsub, "."); subindex != -1 {
|
||
context.Input.Params[":ext"] = lastsub[subindex+1:]
|
||
r.URL.Query().Add(":ext", lastsub[subindex+1:])
|
||
r.URL.RawQuery = r.URL.Query().Encode()
|
||
requestPath = requestPath[:len(requestPath)-len(lastsub[subindex:])]
|
||
}
|
||
for cName, methodmap := range p.autoRouter {
|
||
// if prev already find the router break
|
||
if findrouter {
|
||
break
|
||
}
|
||
if strings.ToLower(requestPath) == "/"+cName {
|
||
http.Redirect(w, r, requestPath+"/", 301)
|
||
goto Admin
|
||
}
|
||
// if there's no action, set the default action to index
|
||
if strings.ToLower(requestPath) == "/"+cName+"/" {
|
||
requestPath = requestPath + "index"
|
||
}
|
||
// if the request path start with controllerName
|
||
if strings.HasPrefix(strings.ToLower(requestPath), "/"+cName+"/") {
|
||
for mName, controllerType := range methodmap {
|
||
if strings.ToLower(requestPath) == "/"+cName+"/"+strings.ToLower(mName) ||
|
||
(strings.HasPrefix(strings.ToLower(requestPath), "/"+cName+"/"+strings.ToLower(mName)) &&
|
||
requestPath[len("/"+cName+"/"+strings.ToLower(mName)):len("/"+cName+"/"+strings.ToLower(mName))+1] == "/") {
|
||
runrouter = controllerType
|
||
runMethod = mName
|
||
findrouter = true
|
||
//parse params
|
||
otherurl := requestPath[len("/"+cName+"/"+strings.ToLower(mName)):]
|
||
if len(otherurl) > 1 {
|
||
plist := strings.Split(otherurl, "/")
|
||
for k, v := range plist[1:] {
|
||
context.Input.Params[strconv.Itoa(k)] = v
|
||
}
|
||
}
|
||
break
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
//if no matches to url, throw a not found exception
|
||
if !findrouter {
|
||
middleware.Exception("404", rw, r, "")
|
||
goto Admin
|
||
}
|
||
|
||
if findrouter {
|
||
if r.Method == "POST" {
|
||
r.ParseMultipartForm(MaxMemory)
|
||
}
|
||
//execute middleware filters
|
||
if do_filter(BeforeExec) {
|
||
goto Admin
|
||
}
|
||
|
||
//Invoke the request handler
|
||
vc := reflect.New(runrouter)
|
||
execController, ok := vc.Interface().(ControllerInterface)
|
||
if !ok {
|
||
panic("controller is not ControllerInterface")
|
||
}
|
||
|
||
//call the controller init function
|
||
execController.Init(context, runrouter.Name(), runMethod, vc.Interface())
|
||
|
||
//if XSRF is Enable then check cookie where there has any cookie in the request's cookie _csrf
|
||
if EnableXSRF {
|
||
execController.XsrfToken()
|
||
if r.Method == "POST" || r.Method == "DELETE" || r.Method == "PUT" ||
|
||
(r.Method == "POST" && (r.Form.Get("_method") == "delete" || r.Form.Get("_method") == "put")) {
|
||
execController.CheckXsrfCookie()
|
||
}
|
||
}
|
||
|
||
//call prepare function
|
||
execController.Prepare()
|
||
|
||
if !w.started {
|
||
//exec main logic
|
||
switch runMethod {
|
||
case "Get":
|
||
execController.Get()
|
||
case "Post":
|
||
execController.Post()
|
||
case "Delete":
|
||
execController.Delete()
|
||
case "Put":
|
||
execController.Put()
|
||
case "Head":
|
||
execController.Head()
|
||
case "Patch":
|
||
execController.Patch()
|
||
case "Options":
|
||
execController.Options()
|
||
default:
|
||
in := make([]reflect.Value, 0)
|
||
method := vc.MethodByName(runMethod)
|
||
method.Call(in)
|
||
}
|
||
|
||
//render template
|
||
if !w.started && !context.Input.IsWebsocket() {
|
||
if AutoRender {
|
||
if err := execController.Render(); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
// finish all runrouter. release resource
|
||
execController.Finish()
|
||
|
||
//execute middleware filters
|
||
if do_filter(AfterExec) {
|
||
goto Admin
|
||
}
|
||
}
|
||
|
||
Admin:
|
||
do_filter(FinishRouter)
|
||
|
||
//admin module record QPS
|
||
if EnableAdmin {
|
||
timeend := time.Since(starttime)
|
||
if FilterMonitorFunc(r.Method, requestPath, timeend) {
|
||
if runrouter != nil {
|
||
go toolbox.StatisticsMap.AddStatistics(r.Method, requestPath, runrouter.Name(), timeend)
|
||
} else {
|
||
go toolbox.StatisticsMap.AddStatistics(r.Method, requestPath, "", timeend)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// there always should be error handler that sets error code accordingly for all unhandled errors
|
||
// in order to have custom UI for error page it's necessary to override "500" error
|
||
func (p *ControllerRegistor) getErrorHandler(errorCode string) func(rw http.ResponseWriter, r *http.Request) {
|
||
handler := middleware.SimpleServerError
|
||
ok := true
|
||
if errorCode != "" {
|
||
handler, ok = middleware.ErrorMaps[errorCode]
|
||
if !ok {
|
||
handler, ok = middleware.ErrorMaps["500"]
|
||
}
|
||
if !ok || handler == nil {
|
||
handler = middleware.SimpleServerError
|
||
}
|
||
}
|
||
|
||
return handler
|
||
}
|
||
|
||
func (p *ControllerRegistor) getRunMethod(method string, context *beecontext.Context, router *controllerInfo) string {
|
||
method = strings.ToLower(method)
|
||
if method == "post" && strings.ToLower(context.Input.Query("_method")) == "put" {
|
||
method = "put"
|
||
}
|
||
if method == "post" && strings.ToLower(context.Input.Query("_method")) == "delete" {
|
||
method = "delete"
|
||
}
|
||
if router.hasMethod {
|
||
if m, ok := router.methods[method]; ok {
|
||
return m
|
||
} else if m, ok = router.methods["*"]; ok {
|
||
return m
|
||
} else {
|
||
return strings.Title(method)
|
||
}
|
||
} else {
|
||
return strings.Title(method)
|
||
}
|
||
}
|
||
|
||
//responseWriter is a wrapper for the http.ResponseWriter
|
||
//started set to true if response was written to then don't execute other handler
|
||
type responseWriter struct {
|
||
writer http.ResponseWriter
|
||
started bool
|
||
status int
|
||
contentEncoding string
|
||
}
|
||
|
||
// Header returns the header map that will be sent by WriteHeader.
|
||
func (w *responseWriter) Header() http.Header {
|
||
return w.writer.Header()
|
||
}
|
||
|
||
func (w *responseWriter) InitHeadContent(contentlength int64) {
|
||
if w.contentEncoding == "gzip" {
|
||
w.Header().Set("Content-Encoding", "gzip")
|
||
} else if w.contentEncoding == "deflate" {
|
||
w.Header().Set("Content-Encoding", "deflate")
|
||
} else {
|
||
w.Header().Set("Content-Length", strconv.FormatInt(contentlength, 10))
|
||
}
|
||
}
|
||
|
||
// Write writes the data to the connection as part of an HTTP reply,
|
||
// and sets `started` to true
|
||
func (w *responseWriter) Write(p []byte) (int, error) {
|
||
w.started = true
|
||
return w.writer.Write(p)
|
||
}
|
||
|
||
// WriteHeader sends an HTTP response header with status code,
|
||
// and sets `started` to true
|
||
func (w *responseWriter) WriteHeader(code int) {
|
||
w.status = code
|
||
w.started = true
|
||
w.writer.WriteHeader(code)
|
||
}
|