webSocket + socket.io 简易聊天室

1. 安装socket.io：npm install socket.io -g

2. 服务端代码：server.js

---

var app = require('http').createServer(handler); var io = require('socket.io').listen(app); var fs = require('fs');

app.listen(8080);

function handler(req, res) { fs.readFile(__dirname + '/index.html', function(err, data) { if (err) { res.writeHead(500); return res.end('Error loading index.html'); }

res.writeHead(200); res.end(data); }); }

io.sockets.on('connection', function(socket) { socket.broadcast.emit('notify', { message : '欢迎“' + socket.id + "”进入了聊天室" });

socket.on('sendMessage', function(data) { data.nickname = socket.store.data.nickname; socket.broadcast.emit('newMessage', data); // 给公众发消息 socket.emit('newMessage', data); // 给自己发消息 });

socket.on('setNickname', function(data){ var _nickname = socket.store.data.nickname; socket.set('nickname', data.nickname, function(){ socket.broadcast.emit('notify', { message : '“' + _nickname + '”' + '更名为：“' + data.nickname + '”' }); }); });

socket.on('disconnect', function(){ socket.broadcast.emit('notify', { message : '“' + socket.store.data.nickname + "”离开了聊天室" }); }); });

3. 客户端代码：index.html

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month = month > 10 ? month : '0' + month; day = day > 10 ? day : '0' + day; hours = hours > 10 ? hours : '0' + hours; minute = minute > 10 ? minute : '0' + minute; second = second > 10 ? second : '0' + second;

return year+'-'+month+'-'+day+' '+hours+':'+minute+':'+second; };

$(document).ready(function(){ var socket = io.connect('http://localhost:8080');

/**

• 播报消息列表里的消息 */ var notifies = new Array(); var notifyLoop = setInterval(function() { if(notifies.length > 0) { $('#notify').text(notifies.splice(0, 1)[0]); if($('#notify').is(':hidden')) { $('#notify').slideDown(400); } } else { $('#notify').slideUp(400); } }, 2000);

/**

• 初次连接显示公告 */ socket.on('notify', function (data) { notifies.push("["+ (new Date).datetime() + "]"+ data.message); });

/**

• 接受消息 */ socket.on('newMessage', function(data){ $('#publicMsg').append("<div style="color:#C4C4C4; margin-top:10px;">"+data.nickname+" "+(new Date).datetime()+ ""+ data.message+""); });

/**

• 发送消息 */ $('#sendMessage').click(function(){ messageText = $('#messageText').val(); if(messageText != '') { $('#messageText').val(null); socket.emit('sendMessage', { message: messageText }); } });

$('#nickname').change(function(){ nickname = $(this).val(); if(nickname != '') { socket.emit('setNickname', { 'nickname': nickname }); } }); });

4. 启动服务器： node server.js

5. 打开浏览器：http://127.0.0.1:8080/