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: <ul id="incomingChatMessages"></ul>
<br />
<input type="text" id="outgoingChatMessage">
</body>
</html>
然后在当前目录cmd下: cnpm install socket.io,会在目录下生成一个文件夹node_modules。
然后用命令:node app.js启动服务器
这时候打开两个浏览器窗口,就可以相互聊天了:
参考: