先說點無關的,最近忙于工作沒有更新博客,今天休息順便把golang websocket研究了一下,挺好玩的,寫了一個聊天室,分享給大家.
package main
import (
"fmt"
"io"
"bufio"
"net/http"
"code.google.com/p/go.net/websocket"
"container/list"
)
var connid int
var conns *list.List
func ChatroomServer(ws *websocket.Conn) {
defer ws.Close()
connid++
id := connid
fmt.Printf("connection id: %d/n", id)
item := conns.PushBack(ws)
defer conns.Remove(item)
name := fmt.Sprintf("user%d", id)
SendMessage(nil, fmt.Sprintf("welcome %s join/n", name))
r := bufio.NewReader(ws)
for {
data, err := r.ReadBytes('/n')
if err != nil {
fmt.Printf("disconnected id: %d/n", id)
SendMessage(item, fmt.Sprintf("%s offline/n", name))
break
}
fmt.Printf("%s: %s", name, data)
SendMessage(item, fmt.Sprintf("%s/t> %s", name, data))
}
}
func SendMessage(self *list.Element, data string) {
// for _, item := range conns {
for item := conns.Front(); item != nil; item = item.Next() {
ws, ok := item.Value.(*websocket.Conn)
if !ok {
panic("item not *websocket.Conn")
}
if item == self {
continue
}
io.WriteString(ws, data)
}
}
// 網頁客戶端
func Client(w http.ResponseWriter, r *http.Request) {
html := `<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>golang websocket chatroom</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
var ws = new WebSocket("ws://127.0.0.1:6611/chatroom");
ws.onopen = function(e){
console.log("onopen");
console.dir(e);
};
ws.onmessage = function(e){
console.log("onmessage");
console.dir(e);
$('#log').append('<p>'+e.data+'<p>');
$('#log').get(0).scrollTop = $('#log').get(0).scrollHeight;
};
ws.onclose = function(e){
console.log("onclose");
console.dir(e);
};
ws.onerror = function(e){
console.log("onerror");
console.dir(e);
};
$(function(){
$('#msgform').submit(function(){
ws.send($('#msg').val()+"/n");
$('#log').append('<p style="color:red;">My > '+$('#msg').val()+'<p>');
$('#log').get(0).scrollTop = $('#log').get(0).scrollHeight;
$('#msg').val('');
return false;
});
});
</script>
</head>
<body>
<div id="log" style="height: 300px;overflow-y: scroll;border: 1px solid #CCC;">
</div>
<div>
<form id="msgform">
<input type="text" id="msg" size="60" />
</form>
</div>
</body>
</html>`
io.WriteString(w, html)
}
func main() {
fmt.Printf(`Welcome chatroom server!
author: dotcoo zhao
url: http://www.dotcoo.com/golang-websocket-chatroom
`)
connid = 0
conns = list.New()
http.Handle("/chatroom", websocket.Handler(ChatroomServer));
http.HandleFunc("/", Client);
err := http.ListenAndServe(":6611", nil);
if err != nil {
panic("ListenAndServe: " + err.Error())
}
}
簡陋了些,但是基本功能都有了.
