forked from Terry-Mao/gopush2
/
pubsub_http.go
295 lines (252 loc) · 6.98 KB
/
pubsub_http.go
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package main
import (
"code.google.com/p/go.net/websocket"
"encoding/json"
"io/ioutil"
"net"
"net/http"
"strconv"
"time"
)
func StartHttp() error {
// set sub handler
http.Handle("/sub", websocket.Handler(SubscribeHandle))
if Conf.Debug == 1 {
http.HandleFunc("/client", Client)
}
// admin
if Conf.AdminAddr != Conf.Addr {
go func() {
adminServeMux := http.NewServeMux()
// publish
adminServeMux.HandleFunc("/pub", PublishHandle)
// stat
adminServeMux.HandleFunc("/stat", StatHandle)
// channel
if Conf.Auth == 1 {
adminServeMux.HandleFunc("/ch", ChannelHandle)
}
err := http.ListenAndServe(Conf.AdminAddr, adminServeMux)
if err != nil {
Log.Printf("http.ListenAdServe(\"%s\") failed (%s)", Conf.AdminAddr, err.Error())
panic(err)
}
}()
} else {
http.HandleFunc("/pub", PublishHandle)
http.HandleFunc("/stat", StatHandle)
if Conf.Auth == 1 {
http.HandleFunc("/ch", ChannelHandle)
}
}
if Conf.TCPKeepAlive == 1 {
server := &http.Server{}
l, err := net.Listen("tcp", Conf.Addr)
if err != nil {
Log.Printf("net.Listen(\"tcp\", \"%s\") failed (%s)", Conf.Addr, err.Error())
return err
}
return server.Serve(&KeepAliveListener{Listener: l})
} else {
if err := http.ListenAndServe(Conf.Addr, nil); err != nil {
Log.Printf("http.ListenAdServe(\"%s\") failed (%s)", Conf.Addr, err.Error())
return err
}
}
// nerve here
return nil
}
// http handler for create channel and add token
func ChannelHandle(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
http.Error(w, "Method Not Allowed", 405)
return
}
params := r.URL.Query()
key := params.Get("key")
token := params.Get("token")
if key == "" || token == "" {
if err := retWrite(w, "param error", retParamErr); err != nil {
Log.Printf("retWrite failed (%s)", err.Error())
}
return
}
Log.Printf("device %s: add channel, token = %s", key, token)
c, err := channel.New(key)
if err != nil {
Log.Printf("device %s: can't create channle", key)
if err = retWrite(w, "create channel failed", retCreateChannel); err != nil {
Log.Printf("retWrite failed (%s)", err.Error())
}
return
}
if err = c.AddToken(token, key); err != nil {
Log.Printf("device %s: can't add token %s", key, token)
if err = retWrite(w, "add token failed", retAddToken); err != nil {
Log.Printf("retWrite failed (%s)", err.Error())
return
}
}
if err = retWrite(w, "ok", retOK); err != nil {
Log.Printf("retWrite() failed (%s)", err.Error())
}
return
}
func PublishHandle(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.Error(w, "Method Not Allowed", 405)
return
}
params := r.URL.Query()
// get pub message key
key := params.Get("key")
// get the expired sec
expireStr := params.Get("expire")
expire, err := strconv.ParseInt(expireStr, 10, 64)
if err != nil {
// use default setting
expire = Conf.MessageExpireSec * Second
}
expire = time.Now().UnixNano() + expire*Second
// get message id
midStr := params.Get("mid")
mid, err := strconv.ParseInt(midStr, 10, 64)
if err != nil {
if err = retWrite(w, "param error", retParamErr); err != nil {
Log.Printf("retWrite failed (%s)", err.Error())
}
return
}
body, err := ioutil.ReadAll(r.Body)
if err != nil {
if err = retWrite(w, "read http body error", retInternalErr); err != nil {
Log.Printf("pubRetWrite() failed (%s)", err.Error())
}
return
}
// fetch subscriber from the channel
c, err := channel.Get(key)
if err != nil {
if err = retWrite(w, "can't get a subscriber", retGetChannel); err != nil {
Log.Printf("pubRetWrite() failed (%s)", err.Error())
}
return
}
if err = c.PushMsg(&Message{Msg: string(body), Expire: expire, MsgID: mid}, key); err != nil {
Log.Printf("device %s: push message failed (%s)", key, err.Error())
if err = retWrite(w, "push msg failed", retPushMsg); err != nil {
Log.Printf("pubRetWrite() failed (%s)", err.Error())
}
return
}
if err = retWrite(w, "ok", retOK); err != nil {
Log.Printf("pubRetWrite() failed (%s)", err.Error())
return
}
}
func SubscribeHandle(ws *websocket.Conn) {
defer recoverFunc()
params := ws.Request().URL.Query()
// get subscriber key
key := params.Get("key")
// get lastest message id
midStr := params.Get("mid")
mid, err := strconv.ParseInt(midStr, 10, 64)
if err != nil {
Log.Printf("mid argument error (%s)", err.Error())
return
}
// get heartbeat second
heartbeat := Conf.HeartbeatSec
heartbeatStr := params.Get("heartbeat")
if heartbeatStr != "" {
i, err := strconv.Atoi(heartbeatStr)
if err != nil {
Log.Printf("heartbeat argument error (%s)", err.Error())
return
}
heartbeat = i
}
heartbeat *= 2
if heartbeat <= 0 {
Log.Printf("heartbeat argument error, less than 0")
return
}
// get auth token
token := params.Get("token")
Log.Printf("client %s subscribe to key = %s, mid = %d, token = %s, heartbeat = %d", ws.Request().RemoteAddr, key, mid, token, heartbeat)
// fetch subscriber from the channel
c, err := channel.Get(key)
if err != nil {
if Conf.Auth == 0 {
c, err = channel.New(key)
if err != nil {
Log.Printf("device %s: can't create channle", key)
return
}
} else {
Log.Printf("device %s: can't get a channel (%s)", key, err.Error())
return
}
}
// auth
if Conf.Auth == 1 {
if err = c.AuthToken(token, key); err != nil {
Log.Printf("device %s: auth token failed \"%s\" (%s)", key, token, err.Error())
return
}
}
// send stored message, and use the last message id if sent any
if err = c.SendMsg(ws, mid, key); err != nil {
Log.Printf("device %s: send offline message failed (%s)", key, err.Error())
return
}
// add a conn to the channel
if err = c.AddConn(ws, mid, key); err != nil {
Log.Printf("device %s: add conn failed (%s)", key, err.Error())
return
}
// remove exists conn
defer func() {
if err := c.RemoveConn(ws, mid, key); err != nil {
Log.Printf("device %s: remove conn failed (%s)", key, err.Error())
}
}()
// blocking wait client heartbeat
reply := ""
for {
ws.SetReadDeadline(time.Now().Add(time.Second * time.Duration(heartbeat)))
if err = websocket.Message.Receive(ws, &reply); err != nil {
Log.Printf("websocket.Message.Receive() failed (%s)", err.Error())
return
}
if reply == heartbeatMsg {
if _, err = ws.Write(heartbeatBytes); err != nil {
Log.Printf("device %s: write heartbeat to client failed (%s)", key, err.Error())
return
}
Log.Printf("device %s: receive heartbeat", key)
} else {
Log.Printf("device %s: unknown heartbeat protocol", key)
return
}
}
return
}
func retWrite(w http.ResponseWriter, msg string, ret int) error {
res := map[string]interface{}{}
res["msg"] = msg
res["ret"] = ret
strJson, err := json.Marshal(res)
if err != nil {
Log.Printf("json.Marshal(\"%v\") failed", res)
return err
}
respJson := string(strJson)
Log.Printf("pub send to client: %s", respJson)
if _, err := w.Write(strJson); err != nil {
Log.Printf("w.Write(\"%s\") failed (%s)", respJson, err.Error())
return err
}
return nil
}