mirror of
https://github.com/astaxie/beego.git
synced 2024-11-25 20:51:29 +00:00
742 lines
19 KiB
Go
742 lines
19 KiB
Go
package beego
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import (
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"fmt"
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beecontext "github.com/astaxie/beego/context"
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"github.com/astaxie/beego/middleware"
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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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)
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var HTTPMETHOD = []string{"get", "post", "put", "delete", "patch", "options", "head"}
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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
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fixrouters []*controllerInfo
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enableFilter bool
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filters map[string][]*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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}
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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[string][]*FilterRouter),
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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 fomate is error")
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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 == "*" || 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 don't exist in the controller " + t.Name())
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}
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} else {
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panic(v + " is an error method mapping,Don't exist method named " + 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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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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// Filter adds the middleware filter.
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func (p *ControllerRegistor) AddFilter(pattern, action string, filter FilterFunc) {
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p.enableFilter = true
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mr := new(FilterRouter)
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mr.filterFunc = filter
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parts := strings.Split(pattern, "/")
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j := 0
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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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parts[i] = expr
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j++
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}
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}
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if j != 0 {
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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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mr.regex = regex
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mr.hasregex = true
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}
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mr.pattern = pattern
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p.filters[action] = append(p.filters[action], mr)
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}
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// AutoRoute
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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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errstr := fmt.Sprint(err)
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if handler, ok := middleware.ErrorMaps[errstr]; ok && ErrorsShow {
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handler(rw, r)
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} else {
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if !RecoverPanic {
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// go back to panic
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panic(err)
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} else {
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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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if RunMode == "dev" {
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stack = stack + fmt.Sprintln(file, line)
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}
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}
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if RunMode == "dev" {
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middleware.ShowErr(err, rw, r, stack)
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}
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}
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}
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}
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}()
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w := &responseWriter{writer: rw}
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w.Header().Set("Server", "beegoServer")
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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(w),
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}
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context.Output.Context = context
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if context.Input.IsWebsocket() {
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context.ResponseWriter = rw
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context.Output = beecontext.NewOutput(rw)
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}
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if SessionOn {
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context.Input.CruSession = GlobalSessions.SessionStart(w, r)
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}
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var runrouter *controllerInfo
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var findrouter bool
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params := make(map[string]string)
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if p.enableFilter {
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if l, ok := p.filters["BeforRouter"]; ok {
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for _, filterR := range l {
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if filterR.ValidRouter(r.URL.Path) {
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filterR.filterFunc(context)
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if w.started {
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return
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}
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}
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}
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}
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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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return
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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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return
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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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return
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}
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http.ServeFile(w, r, file)
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w.started = true
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return
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}
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}
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if p.enableFilter {
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if l, ok := p.filters["AfterStatic"]; ok {
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for _, filterR := range l {
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if filterR.ValidRouter(r.URL.Path) {
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filterR.filterFunc(context)
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if w.started {
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return
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}
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}
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}
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}
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}
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requestPath := r.URL.Path
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if CopyRequestBody {
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context.Input.Body()
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}
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//first find path from the fixrouters to Improve Performance
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for _, route := range p.fixrouters {
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n := len(requestPath)
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if requestPath == route.pattern {
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runrouter = route
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findrouter = true
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break
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}
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// pattern /admin url /admin 200 /admin/ 404
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// pattern /admin/ url /admin 301 /admin/ 200
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if requestPath[n-1] != '/' && len(route.pattern) == n+1 &&
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route.pattern[n] == '/' && route.pattern[:n-1] == requestPath {
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http.Redirect(w, r, requestPath+"/", 301)
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return
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}
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}
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//find regex's router
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if !findrouter {
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//find a matching Route
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for _, route := range p.routers {
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//check if Route pattern matches url
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if !route.regex.MatchString(requestPath) {
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continue
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}
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//get submatches (params)
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matches := route.regex.FindStringSubmatch(requestPath)
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//double check that the Route matches the URL pattern.
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if len(matches[0]) != len(requestPath) {
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continue
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}
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if len(route.params) > 0 {
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//add url parameters to the query param map
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values := r.URL.Query()
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for i, match := range matches[1:] {
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values.Add(route.params[i], match)
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params[route.params[i]] = match
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}
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//reassemble query params and add to RawQuery
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r.URL.RawQuery = url.Values(values).Encode()
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}
|
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runrouter = route
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findrouter = true
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break
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}
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}
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context.Input.Param = params
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if runrouter != nil {
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if r.Method == "POST" {
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r.ParseMultipartForm(MaxMemory)
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}
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//execute middleware filters
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if p.enableFilter {
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if l, ok := p.filters["BeforExec"]; ok {
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for _, filterR := range l {
|
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if filterR.ValidRouter(r.URL.Path) {
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filterR.filterFunc(context)
|
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if w.started {
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return
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}
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}
|
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}
|
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}
|
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}
|
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//Invoke the request handler
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vc := reflect.New(runrouter.controllerType)
|
||
|
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//call the controller init function
|
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method := vc.MethodByName("Init")
|
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in := make([]reflect.Value, 2)
|
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in[0] = reflect.ValueOf(context)
|
||
in[1] = reflect.ValueOf(runrouter.controllerType.Name())
|
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method.Call(in)
|
||
|
||
//if XSRF is Enable then check cookie where there has any cookie in the request's cookie _csrf
|
||
if EnableXSRF {
|
||
in = make([]reflect.Value, 0)
|
||
method = vc.MethodByName("XsrfToken")
|
||
method.Call(in)
|
||
if r.Method == "POST" || r.Method == "DELETE" || r.Method == "PUT" ||
|
||
(r.Method == "POST" && (r.Form.Get("_method") == "delete" || r.Form.Get("_method") == "put")) {
|
||
method = vc.MethodByName("CheckXsrfCookie")
|
||
method.Call(in)
|
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}
|
||
}
|
||
|
||
//call prepare function
|
||
in = make([]reflect.Value, 0)
|
||
method = vc.MethodByName("Prepare")
|
||
method.Call(in)
|
||
|
||
//if response has written,yes don't run next
|
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if !w.started {
|
||
if r.Method == "GET" {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["get"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Get")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Get")
|
||
}
|
||
method.Call(in)
|
||
} else if r.Method == "HEAD" {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["head"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Head")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Head")
|
||
}
|
||
|
||
method.Call(in)
|
||
} else if r.Method == "DELETE" || (r.Method == "POST" && r.Form.Get("_method") == "delete") {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["delete"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Delete")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Delete")
|
||
}
|
||
method.Call(in)
|
||
} else if r.Method == "PUT" || (r.Method == "POST" && r.Form.Get("_method") == "put") {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["put"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Put")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Put")
|
||
}
|
||
method.Call(in)
|
||
} else if r.Method == "POST" {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["post"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Post")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Post")
|
||
}
|
||
method.Call(in)
|
||
} else if r.Method == "PATCH" {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["patch"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Patch")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Patch")
|
||
}
|
||
method.Call(in)
|
||
} else if r.Method == "OPTIONS" {
|
||
if runrouter.hasMethod {
|
||
if m, ok := runrouter.methods["options"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else if m, ok = runrouter.methods["*"]; ok {
|
||
method = vc.MethodByName(m)
|
||
} else {
|
||
method = vc.MethodByName("Options")
|
||
}
|
||
} else {
|
||
method = vc.MethodByName("Options")
|
||
}
|
||
method.Call(in)
|
||
}
|
||
gotofunc := vc.Elem().FieldByName("gotofunc").String()
|
||
if gotofunc != "" {
|
||
method = vc.MethodByName(gotofunc)
|
||
if method.IsValid() {
|
||
method.Call(in)
|
||
} else {
|
||
panic("gotofunc is exists:" + gotofunc)
|
||
}
|
||
}
|
||
if !w.started && !context.Input.IsWebsocket() {
|
||
if AutoRender {
|
||
method = vc.MethodByName("Render")
|
||
method.Call(in)
|
||
}
|
||
}
|
||
}
|
||
|
||
method = vc.MethodByName("Finish")
|
||
method.Call(in)
|
||
//execute middleware filters
|
||
if p.enableFilter {
|
||
if l, ok := p.filters["AfterExec"]; ok {
|
||
for _, filterR := range l {
|
||
if filterR.ValidRouter(r.URL.Path) {
|
||
filterR.filterFunc(context)
|
||
if w.started {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
method = vc.MethodByName("Destructor")
|
||
method.Call(in)
|
||
}
|
||
|
||
//start autorouter
|
||
|
||
if p.enableAuto {
|
||
if !findrouter {
|
||
lastindex := strings.LastIndex(requestPath, "/")
|
||
lastsub := requestPath[lastindex+1:]
|
||
if subindex := strings.LastIndex(lastsub, "."); subindex != -1 {
|
||
context.Input.Param[":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 strings.ToLower(requestPath) == "/"+cName {
|
||
http.Redirect(w, r, requestPath+"/", 301)
|
||
return
|
||
}
|
||
|
||
if strings.ToLower(requestPath) == "/"+cName+"/" {
|
||
requestPath = requestPath + "index"
|
||
}
|
||
if strings.HasPrefix(strings.ToLower(requestPath), "/"+cName+"/") {
|
||
for mName, controllerType := range methodmap {
|
||
if strings.HasPrefix(strings.ToLower(requestPath), "/"+cName+"/"+strings.ToLower(mName)) {
|
||
if r.Method == "POST" {
|
||
r.ParseMultipartForm(MaxMemory)
|
||
}
|
||
//execute middleware filters
|
||
if p.enableFilter {
|
||
if l, ok := p.filters["BeforExec"]; ok {
|
||
for _, filterR := range l {
|
||
if filterR.ValidRouter(r.URL.Path) {
|
||
filterR.filterFunc(context)
|
||
if w.started {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
//parse params
|
||
otherurl := requestPath[len("/"+cName+"/"+strings.ToLower(mName)):]
|
||
if len(otherurl) > 1 {
|
||
plist := strings.Split(otherurl, "/")
|
||
for k, v := range plist[1:] {
|
||
params[strconv.Itoa(k)] = v
|
||
}
|
||
}
|
||
//Invoke the request handler
|
||
vc := reflect.New(controllerType)
|
||
|
||
//call the controller init function
|
||
init := vc.MethodByName("Init")
|
||
in := make([]reflect.Value, 2)
|
||
in[0] = reflect.ValueOf(context)
|
||
in[1] = reflect.ValueOf(controllerType.Name())
|
||
init.Call(in)
|
||
//call prepare function
|
||
in = make([]reflect.Value, 0)
|
||
method := vc.MethodByName("Prepare")
|
||
method.Call(in)
|
||
method = vc.MethodByName(mName)
|
||
method.Call(in)
|
||
//if XSRF is Enable then check cookie where there has any cookie in the request's cookie _csrf
|
||
if EnableXSRF {
|
||
method = vc.MethodByName("XsrfToken")
|
||
method.Call(in)
|
||
if r.Method == "POST" || r.Method == "DELETE" || r.Method == "PUT" ||
|
||
(r.Method == "POST" && (r.Form.Get("_method") == "delete" || r.Form.Get("_method") == "put")) {
|
||
method = vc.MethodByName("CheckXsrfCookie")
|
||
method.Call(in)
|
||
}
|
||
}
|
||
if !w.started && !context.Input.IsWebsocket() {
|
||
if AutoRender {
|
||
method = vc.MethodByName("Render")
|
||
method.Call(in)
|
||
}
|
||
}
|
||
method = vc.MethodByName("Finish")
|
||
method.Call(in)
|
||
//execute middleware filters
|
||
if p.enableFilter {
|
||
if l, ok := p.filters["AfterExec"]; ok {
|
||
for _, filterR := range l {
|
||
if filterR.ValidRouter(r.URL.Path) {
|
||
filterR.filterFunc(context)
|
||
if w.started {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
method = vc.MethodByName("Destructor")
|
||
method.Call(in)
|
||
// set find
|
||
findrouter = true
|
||
goto Last
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
Last:
|
||
//if no matches to url, throw a not found exception
|
||
if !findrouter {
|
||
middleware.Exception("404", rw, r, "")
|
||
}
|
||
}
|
||
|
||
//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
|
||
}
|
||
|
||
// Header returns the header map that will be sent by WriteHeader.
|
||
func (w *responseWriter) Header() http.Header {
|
||
return w.writer.Header()
|
||
}
|
||
|
||
// 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)
|
||
}
|