296 lines
7.0 KiB
Go
296 lines
7.0 KiB
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.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)
|
||
//route like "/"
|
||
if n == 1 {
|
||
if requestPath == route.pattern {
|
||
runrouter = route
|
||
findrouter = true
|
||
break
|
||
} else {
|
||
continue
|
||
}
|
||
}
|
||
|
||
if (requestPath[n-1] != '/' && route.pattern == requestPath) ||
|
||
(len(route.pattern) >= n-1 && 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)
|
||
}
|