node.js实现WebSocket

最近在学习“HTML5游戏开发实战”，其中第8章内容是使用WebSocket来构建多人游戏—《你画我猜》。然而在实现过程中，却一直出错：

客户端请求时，服务器端会报错并终止：

而浏览器端也会出错：

服务器代码：

var ws = require(__dirname + '\\lib\\ws\\server');
var server = ws.createServer();server.addListener("connection",function(conn){
    //处理连接接入
    console.log("A connection established with id",conn.id);
    var message = "Welcome " + conn.id + " joining the party.Total connection:" + server.manager.length;
    console.log(message);
    server.broadcast(message);
});
server.listen(8000);console.log("WebSocket server is running.");
console.log("Listening to port 8000.");

客户端代码：

var websocketGame = {}$(function(){
    if(window['WebSocket']){
        //创建连接
        websocketGame.socket = new WebSocket("ws://localhost:8000");
        //处理open事件
        websocketGame.socket.onopen = function(e){
            console.log('WebSocket connection established.');
        };        //处理message事件
        websocketGame.socket.onmessage = function(e){
            console.log(e.data);
        };        //处理close事件
        websocketGame.socket.onclose = function(e){
            console.log('WebSocket connection closed.');
        };
    }
});

各种调bug都无效。然后发现原因是chrome端的不兼容：

node-websocket-server，不支持websocket的draft-10，而chrome 14+浏览器，只支持draft-10的websocket，这样chrome基本都不能用了

因为按书上的教程使用的是node-websocket-server的lib。所以这里按照这篇教程改成了WebSocket-Node

这个工具需要按照两个环境MVC++和Python2.7 于是选择使用socket.io

新建两个文件app.js和index.html

app.js

var fs = require('fs')
    , http = require('http')
    , socketio = require('socket.io');var server = http.createServer(function(req, res) {
    res.writeHead(200, { 'Content-type': 'text/html'});
    res.end(fs.readFileSync(__dirname + '/index.html'));
}).listen(8000, function() {
    console.log('Listening at: http://localhost:8000');
});socketio.listen(server).on('connection', function (socket) {
    socket.on('message', function (msg) {
        console.log('Message Received: ', msg);
        socket.broadcast.emit('message', msg);
    });
});

index.html:

<html>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
    <script src="/socket.io/socket.io.js"></script>
    <script>
        $(function(){
            var iosocket = io.connect();            iosocket.on('connect', function () {
                $('#incomingChatMessages').append($('<li>Connected</li>'));                iosocket.on('message', function(message) {
                    $('#incomingChatMessages').append($('<li></li>').text(message));
                });
                iosocket.on('disconnect', function() {
                    $('#incomingChatMessages').append('<li>Disconnected</li>');
                });
            });            $('#outgoingChatMessage').keypress(function(event) {
                if(event.which == 13) {
                    event.preventDefault();
                    iosocket.send($('#outgoingChatMessage').val());
                    $('#incomingChatMessages').append($('<li></li>').text($('#outgoingChatMessage').val()));
                    $('#outgoingChatMessage').val('');
                }
            });
        });
    </script>
</head>
<body>
Incoming Chat:&nbsp;<ul id="incomingChatMessages"></ul>
<br />
<input type="text" id="outgoingChatMessage">
</body>
</html>