1.建立个项目，也就是文件夹，这里使用testsocket
2.创建文件package.json，用于描述项目：
{
"name":"testsocket",
"version":"0.0.1",
"description":"my first nodejs app",
"dependencies":{
"express":"~4.10.2",,
"socket.io":"~1.2.0"
}
}
3.创建index.js
var app = require('express')();
//Express初始化变量app，作为方法应用于http服务
var http = require('http').Server(app);
var io = require('socket.io')(http);
//定义一个路由方法'/'用作我们访问网站首页的返回结果
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
console.log('new link:', req);
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
console.log('message: ' + msg);
});
});
//监听服务器3000端口
http.listen(3000, function(){
console.log('listening on *:3000');
});
4.创建index.html
<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var myid = Math.floor(Math.random() * 100) + 1;
var socket = io('/'); $('form').submit(function(){
socket.emit('chat message', myid + ' says: ' + $('#m').val());
$('#m').val('');
return false;
}); socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
}); </script>
</body>
</html>
5.执行
安装：
npm install –save express
npm install –save socket.io
node index.js
浏览器中访问127.0.0.1:3000
6.先实现这些功能再说其他的东西吧
demo下载地址：http://files.cnblogs.com/files/renyuzhuo/testsocket.zip