socket.io安装部署

需要node.js环境

创建package.json

　　npm init

下载相关依赖

npm install --save express@4.10.2

npm会在当前目录下载所需要的依赖到node_modules的文件夹中

下载安装socket.io

　　npm install -save socket.io

事例

服务端示例：

 1 var app = require('express')();
 2 var http = require('http').Server(app);
 3 var io = require('socket.io')(http);
 4 
 5 //app.get('/', function(req, res){
 6 //  res.send('<h1>Hello world</h1>');
 7 //});
 8 
 9 /*app.get('/', function(req, res){
10   res.sendFile(__dirname + '/index.html');
11 });
12 */
13 
14 app.get('/', function(req, res){
15   res.sendfile('index.html');
16 });
17 
18 /*io.on('connection', function(socket){
19   console.log('a user connected');
20 });
21 
22 io.on('connection', function(socket){
23   console.log('a user connected');
24   socket.on('disconnect', function(){
25     console.log('user disconnected');
26   });
27 });
28 
29 io.on('connection', function(socket){
30   socket.on('chat message', function(msg){
31     console.log('message: ' + msg);
32   });
33 });*/
34 
35 
36 io.on('connection', function(socket){
37    socket.on('chat message', function(msg){
38     io.emit('chat message', msg);
39   });
40 })
41 
42 
43 http.listen(3000, function(){
44   console.log('listening on *:3000');
45 });

客户端示例：

 1 <!doctype html>
 2 <html>
 3   <head>
 4     <title>Socket.IO chat</title>
 5     <style>
 6       * { margin: 0; padding: 0; box-sizing: border-box; }
 7       body { font: 13px Helvetica, Arial; }
 8       form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
 9       form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
10       form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
11       #messages { list-style-type: none; margin: 0; padding: 0; }
12       #messages li { padding: 5px 10px; }
13       #messages li:nth-child(odd) { background: #eee; }
14     </style>
15   </head>
16   <body>
17     <ul id="messages"></ul>
18     <form action="">
19       <input id="m" autocomplete="off" /><button>Send</button>
20     </form>
21 <script src="http://code.jquery.com/jquery-1.11.1.js"></script>
22 <script src="/socket.io/socket.io.js"></script>
23 <script>
24   var socket = io();
25   $('form').submit(function(){
26     socket.emit('chat message', $('#m').val());
27     $('#m').val('');
28     return false;
29   });
30   socket.on('chat message', function(msg){
31     $('#messages').append($('<li>').text(msg));
32   });
33 </script>
34 
35 
36   </body>
37 </html>