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server.go
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server.go
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package peony
import (
"code.google.com/p/go.net/websocket"
"errors"
"mime/multipart"
"net"
"net/http"
"net/url"
"os"
"path"
"strings"
)
var (
ActionExist = errors.New("Action already exist")
NoSuchMethod = errors.New("No Such method")
ShouldTypeAction = errors.New("Action should be TypeAction")
)
type Filter func(*Controller, []Filter)
type Server struct {
Interceptors
*http.Server
*Router
*ActionContainer
filters []Filter
convertors *Convertors
notifier *Notifier
templateLoader *TemplateLoader
App *App
SessionManager SessionManager
Addr string
listener net.Listener
}
func GetRandomListenPort() int {
ipcon, err := net.Listen("tcp", ":0")
if err != nil {
ERROR.Fatalln("getListenPort error:", err)
}
ipcon.Close()
return ipcon.Addr().(*net.TCPAddr).Port
}
type Request struct {
*http.Request
ContentType string
Accept string
WSConn *websocket.Conn
}
type Response struct {
http.ResponseWriter
ContentType string
}
type Params struct {
url.Values
Router url.Values //e.g. /xx/<int:name>/ param for router.
Url url.Values
Form url.Values
Files map[string][]*multipart.FileHeader
tmpFiles []*os.File
}
func ResolveContentType(req *http.Request) string {
contentType := req.Header.Get("Content-Type")
if contentType == "" {
return "text/html"
}
return strings.ToLower(strings.TrimSpace(strings.Split(contentType, ";")[0]))
}
func ResolveAccept(req *http.Request) string {
accept := req.Header.Get("accept")
switch {
case accept == "",
strings.HasPrefix(accept, "*/*"), // */
strings.Contains(accept, "application/xhtml"),
strings.Contains(accept, "text/html"):
return "html"
case strings.Contains(accept, "application/xml"),
strings.Contains(accept, "text/xml"):
return "xml"
case strings.Contains(accept, "text/plain"):
return "txt"
case strings.Contains(accept, "application/json"),
strings.Contains(accept, "text/javascript"):
return "json"
}
return "html"
}
func ParseParems(params *Params, req *Request) {
params.Url = req.URL.Query()
// Parse the body depending on the content type.
switch req.ContentType {
case "application/x-www-form-urlencoded":
// Typical form.
if err := req.ParseForm(); err != nil {
ERROR.Println("parse form error, detail:", err)
} else {
params.Form = req.Form
}
case "multipart/form-data":
// Multipart form.
// TODO: Extract the multipart form param so app can set it.
if err := req.ParseMultipartForm(32 << 20 /* 32 MB */); err != nil {
ERROR.Println("parse form error, detail:", err)
} else {
params.Form = req.MultipartForm.Value
params.Files = req.MultipartForm.File
}
}
params.mergeValues()
}
func (p *Params) mergeValues() {
l := len(p.Url) + len(p.Form) + len(p.Router)
var values url.Values = nil
switch l {
case len(p.Url):
values = p.Url
case len(p.Router):
values = p.Router
case len(p.Form):
values = p.Form
}
if values == nil {
values = make(url.Values, l)
for k, v := range p.Url {
values[k] = append(values[k], v...)
}
for k, v := range p.Router {
values[k] = append(values[k], v...)
}
for k, v := range p.Form {
values[k] = append(values[k], v...)
}
}
p.Values = values
}
func ParamsFilter(c *Controller, filter []Filter) {
ParseParems(c.Params, c.Req)
filter[0](c, filter[1:])
for _, tmp := range c.Params.tmpFiles {
if err := os.Remove(tmp.Name()); err != nil {
WARN.Println("remove temp file error,", err)
}
}
}
func (r *Response) WriteContentTypeCode(code int, contentType string) {
if contentType == "" {
contentType = "text/html"
}
r.Header().Set("Content-Type", contentType)
r.ResponseWriter.WriteHeader(code)
}
func (r *Response) SetHeader(key, value string) {
r.Header().Set(key, value)
}
func NewRequest(r *http.Request) *Request {
return &Request{Request: r,
ContentType: ResolveContentType(r),
Accept: ResolveAccept(r),
}
}
func NewResponse(r http.ResponseWriter) *Response {
return &Response{ResponseWriter: r}
}
func (server *Server) handler(w http.ResponseWriter, r *http.Request) {
upgrade := r.Header.Get("Upgrade")
if upgrade == "websocket" || upgrade == "Websocket" {
websocket.Handler(func(wsconn *websocket.Conn) {
req := NewRequest(r)
req.Method = "WS"
req.WSConn = wsconn
server.handlerInner(NewResponse(w), req)
}).ServeHTTP(w, r)
} else {
server.handlerInner(NewResponse(w), NewRequest(r))
}
}
func NewController(w http.ResponseWriter, r *http.Request, loader *TemplateLoader) *Controller {
return &Controller{Resp: NewResponse(w), Req: NewRequest(r), templateLoader: loader}
}
func (server *Server) handlerInner(resp *Response, req *Request) {
c := &Controller{Resp: resp, Req: req, templateLoader: server.templateLoader}
c.Server = server
server.filters[0](c, server.filters[1:])
if c.render != nil {
c.render.Apply(c)
}
}
func (s *Server) BindDefaultFilters() {
s.filters = []Filter{
RecoverFilter,
GetNotifyFilter(s),
//static filter must be location after notify filter, the static used the templateloader should inited in notify.
GetStaticFilter(s),
GetRouterFilter(s),
GetSessionFilter(s),
GetFlashFilter(s),
ParamsFilter,
GetInterceptorFilter(s),
GetActionInvokeFilter(s),
}
}
//mapper the func, e.g. func Index() ...
func (s *Server) FuncMapper(expr string, httpMethods []string, function interface{}, action *Action) error {
if err := s.RegisterFuncAction(function, action); err != nil {
return err
}
return s.AddRule(&Rule{Path: expr, Action: action.Name, HttpMethods: httpMethods})
}
//mapper the func with recv, e.g. func (c *C) Index() ...
func (s *Server) MethodMapper(expr string, httpMethods []string, method interface{}, action *Action) error {
if err := s.RegisterMethodAction(method, action); err != nil {
return err
}
return s.AddRule(&Rule{Path: expr, Action: action.Name, HttpMethods: httpMethods})
}
func NewServer(app *App) *Server {
s := &Server{Addr: app.BindAddr}
s.App = app
return s
}
var serverInitHooks = []func(*Server){}
func OnServerInit(f func(*Server)) {
serverInitHooks = append(serverInitHooks, f)
}
func (s *Server) Init() {
s.Router = NewRouter()
s.ActionContainer = NewActionContainer()
s.convertors = NewConvertors()
s.Interceptors = NewInterceptors()
//the peony project's views is priority, used for render error, follower template loader error.
if s.App.DevMode {
s.templateLoader = NewTemplateLoader([]string{s.App.ViewPath, path.Join(GetPeonyPath(), "views")})
} else {
s.templateLoader = NewTemplateLoader([]string{s.App.ViewPath})
}
s.templateLoader.BindServerTemplateFunc(s)
s.notifier = NewNotifier()
s.notifier.Watch(s.templateLoader)
s.BindDefaultFilters()
for _, f := range serverInitHooks {
f(s)
}
}
func (svr *Server) Listen() error {
addr := svr.Addr
if addr == "" {
addr = ":http"
}
l, e := net.Listen("tcp", addr)
if e != nil {
return e
}
svr.listener = l
return nil
}
func (svr *Server) CloseListener() {
if svr.listener != nil {
svr.listener.Close()
svr.listener = nil
}
}
func (svr *Server) RegisterSessionManager(sm SessionManager) {
svr.SessionManager = sm
}
func (svr *Server) Run() <-chan error {
svr.Server = &http.Server{Addr: svr.Addr, Handler: http.HandlerFunc(svr.handler)}
if svr.listener == nil {
err := svr.Listen()
if err != nil {
return nil
}
}
waitChan := make(chan error, 1)
go func() {
waitChan <- svr.Server.Serve(svr.listener)
}()
return waitChan
}