socket.io

http://www.2cto.com/kf/201403/285640.html

server.js

 1 var io = require('socket.io').listen(8080);
 2 io.set('log level', 1);
 3 var users = {};
 4 io.sockets.on('connection', function (socket) {
 5   io.sockets.emit('connect',{hell:'boy'});
 6  
 7   socket.on('private message', function (from,to,msg) {
 8     console.log('I received a private message by ', from, ' say to ',to, msg);
 9     if(to in users){
10         users[to].emit('to'+to,{mess:msg});
11     }
12   });
13   socket.on('new user',function(data){
14      if(data in users){
15          
16      }else{
17         var nickname = data;
18         users[nickname]= socket;
19      }
20      console.info(users);
21   });
22   socket.on('disconnect', function () {
23     io.sockets.emit('user disconnected');
24   });
25 });

测试页面index.html

 1 <meta charset="utf-8">
 2     <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
 3     <script src="http://localhost:8080/socket.io/socket.io.js"></script>
 4     <script>
 5         $(function(){
 6             var socket = io.connect('http://localhost:8080');
 7             socket.on('connect', function (data) {
 8                 console.log(data);  
 9             });
10              $("#send").click(function(e){
11                 var from = $('#user_name').val(),
12                     msg  = $('#message').val(),
13                     to   = $('#to').val(),
14                  $message_list = $('#message_list');
15                  socket.emit('new user',from);
16                  socket.emit('private message',from,to,msg);
17                  socket.on('to'+from, function (data) {
18                     $message_list.append('<li>'+data.from+'说'+data.message+'</li><li>');
19                 });
20              });
21         });
22     </script>
23  
24  
25     姓名:<input id="user_name" type="text"><br>
26     发送给：<input type="text" id="to"><br>
27     消息内容:<input type="text" id="message"><button type="button" id="send">发送</button>
28     <ul id="message_list">
29          
30     </ul>
31  
32  
33 </li>