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8a995912 by astaxie
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fix bug

1 parent d5626878
Inline Side-by-side
Showing 1 changed file with 284 additions and 283 deletions
router.go
package beego
import (
"net/http"
"net/url"
"reflect"
"regexp"
"runtime"
"strings"
)
type controllerInfo struct {
pattern string
regex *regexp.Regexp
params map[int]string
controllerType reflect.Type
}
type ControllerRegistor struct {
routers []*controllerInfo
fixrouters []*controllerInfo
filters []http.HandlerFunc
}
func NewControllerRegistor() *ControllerRegistor {
return &ControllerRegistor{routers: make([]*controllerInfo, 0)}
}
func (p *ControllerRegistor) Add(pattern string, c ControllerInterface) {
parts := strings.Split(pattern, "/")
j := 0
params := make(map[int]string)
for i, part := range parts {
if strings.HasPrefix(part, ":") {
expr := "([^/]+)"
//a user may choose to override the defult expression
// similar to expressjs: ‘/user/:id([0-9]+)’
if index := strings.Index(part, "("); index != -1 {
expr = part[index:]
part = part[:index]
}
params[j] = part
parts[i] = expr
j++
}
}
if j == 0 {
//now create the Route
t := reflect.Indirect(reflect.ValueOf(c)).Type()
route := &controllerInfo{}
route.pattern = pattern
route.controllerType = t
p.fixrouters = append(p.fixrouters, route)
} else { // add regexp routers
//recreate the url pattern, with parameters replaced
//by regular expressions. then compile the regex
pattern = strings.Join(parts, "/")
regex, regexErr := regexp.Compile(pattern)
if regexErr != nil {
//TODO add error handling here to avoid panic
panic(regexErr)
return
}
//now create the Route
t := reflect.Indirect(reflect.ValueOf(c)).Type()
route := &controllerInfo{}
route.regex = regex
route.params = params
route.controllerType = t
p.routers = append(p.routers, route)
}
}
// Filter adds the middleware filter.
func (p *ControllerRegistor) Filter(filter http.HandlerFunc) {
p.filters = append(p.filters, filter)
}
// FilterParam adds the middleware filter if the REST URL parameter exists.
func (p *ControllerRegistor) FilterParam(param string, filter http.HandlerFunc) {
if !strings.HasPrefix(param, ":") {
param = ":" + param
}
p.Filter(func(w http.ResponseWriter, r *http.Request) {
p := r.URL.Query().Get(param)
if len(p) > 0 {
filter(w, r)
}
})
}
// FilterPrefixPath adds the middleware filter if the prefix path exists.
func (p *ControllerRegistor) FilterPrefixPath(path string, filter http.HandlerFunc) {
p.Filter(func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.URL.Path, path) {
filter(w, r)
}
})
}
// AutoRoute
func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
defer func() {
if err := recover(); err != nil {
if !RecoverPanic {
// go back to panic
panic(err)
} else {
Critical("Handler crashed with error", err)
for i := 1; ; i += 1 {
_, file, line, ok := runtime.Caller(i)
if !ok {
break
}
Critical(file, line)
}
}
}
}()
w := &responseWriter{writer: rw}
var runrouter *controllerInfo
var findrouter bool
params := make(map[string]string)
//static file server
for prefix, staticDir := range StaticDir {
if strings.HasPrefix(r.URL.Path, prefix) {
file := staticDir + r.URL.Path[len(prefix):]
http.ServeFile(w, r, file)
w.started = true
return
}
}
requestPath := r.URL.Path
//first find path from the fixrouters to Improve Performance
for _, route := range p.fixrouters {
n := len(requestPath)
if (requestPath[n-1] != '/' && route.pattern == requestPath) ||
(len(route.pattern) >= n && requestPath[0:n] == route.pattern) {
runrouter = route
findrouter = true
break
}
}
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() + "&" + r.URL.RawQuery
//r.URL.RawQuery = url.Values(values).Encode()
}
runrouter = route
findrouter = true
break
}
}
if runrouter != nil {
//execute middleware filters
for _, filter := range p.filters {
filter(w, r)
if w.started {
return
}
}
//Invoke the request handler
vc := reflect.New(runrouter.controllerType)
//call the controller init function
init := vc.MethodByName("Init")
in := make([]reflect.Value, 2)
ct := &Context{ResponseWriter: w, Request: r, Params: params}
in[0] = reflect.ValueOf(ct)
in[1] = reflect.ValueOf(runrouter.controllerType.Name())
init.Call(in)
//call prepare function
in = make([]reflect.Value, 0)
method := vc.MethodByName("Prepare")
method.Call(in)
//if response has written,yes don't run next
if !w.started {
if r.Method == "GET" {
method = vc.MethodByName("Get")
method.Call(in)
} else if r.Method == "POST" {
method = vc.MethodByName("Post")
method.Call(in)
} else if r.Method == "HEAD" {
method = vc.MethodByName("Head")
method.Call(in)
} else if r.Method == "DELETE" {
method = vc.MethodByName("Delete")
method.Call(in)
} else if r.Method == "PUT" {
method = vc.MethodByName("Put")
method.Call(in)
} else if r.Method == "PATCH" {
method = vc.MethodByName("Patch")
method.Call(in)
} else if r.Method == "OPTIONS" {
method = vc.MethodByName("Options")
method.Call(in)
}
if !w.started {
if AutoRender {
method = vc.MethodByName("Render")
method.Call(in)
}
if !w.started {
method = vc.MethodByName("Finish")
method.Call(in)
}
}
}
}
//if no matches to url, throw a not found exception
if w.started == false {
http.NotFound(w, 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)
}
package beego
import (
"net/http"
"net/url"
"reflect"
"regexp"
"runtime"
"strings"
)
type controllerInfo struct {
pattern string
regex *regexp.Regexp
params map[int]string
controllerType reflect.Type
}
type ControllerRegistor struct {
routers []*controllerInfo
fixrouters []*controllerInfo
filters []http.HandlerFunc
}
func NewControllerRegistor() *ControllerRegistor {
return &ControllerRegistor{routers: make([]*controllerInfo, 0)}
}
func (p *ControllerRegistor) Add(pattern string, c ControllerInterface) {
parts := strings.Split(pattern, "/")
j := 0
params := make(map[int]string)
for i, part := range parts {
if strings.HasPrefix(part, ":") {
expr := "([^/]+)"
//a user may choose to override the defult expression
// similar to expressjs: ‘/user/:id([0-9]+)’
if index := strings.Index(part, "("); index != -1 {
expr = part[index:]
part = part[:index]
}
params[j] = part
parts[i] = expr
j++
}
}
if j == 0 {
//now create the Route
t := reflect.Indirect(reflect.ValueOf(c)).Type()
route := &controllerInfo{}
route.pattern = pattern
route.controllerType = t
p.fixrouters = append(p.fixrouters, route)
} else { // add regexp routers
//recreate the url pattern, with parameters replaced
//by regular expressions. then compile the regex
pattern = strings.Join(parts, "/")
regex, regexErr := regexp.Compile(pattern)
if regexErr != nil {
//TODO add error handling here to avoid panic
panic(regexErr)
return
}
//now create the Route
t := reflect.Indirect(reflect.ValueOf(c)).Type()
route := &controllerInfo{}
route.regex = regex
route.params = params
route.pattern = pattern
route.controllerType = t
p.routers = append(p.routers, route)
}
}
// Filter adds the middleware filter.
func (p *ControllerRegistor) Filter(filter http.HandlerFunc) {
p.filters = append(p.filters, filter)
}
// FilterParam adds the middleware filter if the REST URL parameter exists.
func (p *ControllerRegistor) FilterParam(param string, filter http.HandlerFunc) {
if !strings.HasPrefix(param, ":") {
param = ":" + param
}
p.Filter(func(w http.ResponseWriter, r *http.Request) {
p := r.URL.Query().Get(param)
if len(p) > 0 {
filter(w, r)
}
})
}
// FilterPrefixPath adds the middleware filter if the prefix path exists.
func (p *ControllerRegistor) FilterPrefixPath(path string, filter http.HandlerFunc) {
p.Filter(func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.URL.Path, path) {
filter(w, r)
}
})
}
// AutoRoute
func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
defer func() {
if err := recover(); err != nil {
if !RecoverPanic {
// go back to panic
panic(err)
} else {
Critical("Handler crashed with error", err)
for i := 1; ; i += 1 {
_, file, line, ok := runtime.Caller(i)
if !ok {
break
}
Critical(file, line)
}
}
}
}()
w := &responseWriter{writer: rw}
var runrouter *controllerInfo
var findrouter bool
params := make(map[string]string)
//static file server
for prefix, staticDir := range StaticDir {
if strings.HasPrefix(r.URL.Path, prefix) {
file := staticDir + r.URL.Path[len(prefix):]
http.ServeFile(w, r, file)
w.started = true
return
}
}
requestPath := r.URL.Path
//first find path from the fixrouters to Improve Performance
for _, route := range p.fixrouters {
n := len(requestPath)
if (requestPath[n-1] != '/' && route.pattern == requestPath) ||
(len(route.pattern) >= n && requestPath[0:n-1] == route.pattern) {
runrouter = route
findrouter = true
break
}
}
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() + "&" + r.URL.RawQuery
//r.URL.RawQuery = url.Values(values).Encode()
}
runrouter = route
findrouter = true
break
}
}
if runrouter != nil {
//execute middleware filters
for _, filter := range p.filters {
filter(w, r)
if w.started {
return
}
}
//Invoke the request handler
vc := reflect.New(runrouter.controllerType)
//call the controller init function
init := vc.MethodByName("Init")
in := make([]reflect.Value, 2)
ct := &Context{ResponseWriter: w, Request: r, Params: params}
in[0] = reflect.ValueOf(ct)
in[1] = reflect.ValueOf(runrouter.controllerType.Name())
init.Call(in)
//call prepare function
in = make([]reflect.Value, 0)
method := vc.MethodByName("Prepare")
method.Call(in)
//if response has written,yes don't run next
if !w.started {
if r.Method == "GET" {
method = vc.MethodByName("Get")
method.Call(in)
} else if r.Method == "POST" {
method = vc.MethodByName("Post")
method.Call(in)
} else if r.Method == "HEAD" {
method = vc.MethodByName("Head")
method.Call(in)
} else if r.Method == "DELETE" {
method = vc.MethodByName("Delete")
method.Call(in)
} else if r.Method == "PUT" {
method = vc.MethodByName("Put")
method.Call(in)
} else if r.Method == "PATCH" {
method = vc.MethodByName("Patch")
method.Call(in)
} else if r.Method == "OPTIONS" {
method = vc.MethodByName("Options")
method.Call(in)
}
if !w.started {
if AutoRender {
method = vc.MethodByName("Render")
method.Call(in)
}
if !w.started {
method = vc.MethodByName("Finish")
method.Call(in)
}
}
}
}
//if no matches to url, throw a not found exception
if w.started == false {
http.NotFound(w, 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)
}
......
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