node.js写的一个简单的聊天系统
jopen
10年前
初学node.js感觉很不错，就想做一个项目练手，简单搞了一个聊天系统。
环境：
1、nodejs已安装；
2、我用的IDE是WebStorm；
步骤：
1、新建一个express项目；
2、安装socket.io的包，使用npm install socket.io即可；
先看截图：
接下来看代码即可，没有几行：
app.js
/** * Module dependencies. */ /* var app = require('http').createServer(handler) , io = require('socket.io').listen(app) , fs = require('fs') ; app.listen(99) ; 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.emit('news',{hello : 'world'}) ; socket.on('my other event',function(data){ console.log(data) ; }); }) ; */ var express = require('express'); var routes = require('./routes'); var http = require('http'); var path = require('path'); var app = express(); // all environments app.set('port', process.env.PORT || 3000); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'ejs'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.bodyParser({uploadDir:'./upload'})); app.use(express.methodOverride()); app.use(express.cookieParser()); app.use(app.router); app.use(express.static(path.join(__dirname, 'public'))); // development only if ('development' == app.get('env')) { app.use(express.errorHandler()); } routes(app) ; var ppa = http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); }); io = require('socket.io').listen(ppa) ; io.sockets.on('connection',function(socket){ socket.on('message',function(msg){ console.log('Message Receive:===================== '+msg) ; socket.broadcast.emit('message',msg) ; }) ; }) ;routes里面的index.js
/* * GET home page. */ module.exports = function(app){ app.get('/',function(req,res){ res.render('login'); }) ; app.post('/login',function(req,res){ var username = req.body.username ; res.render('index',{username:username}) ; }) ; };登录页面
<html> <head> <title>login</title> <link rel="stylesheet" type="text/css" href="/stylesheets/bootstrap.css" /> </head> <body> <div class="container" style="width:270px;"> <form class="form-signin" method="post" action="login"> <h2 class="form-signin-heading">Please sign in</h2> <input type="text" class="form-control" placeholder="UserName" autofocus="" name="username"> <label class="checkbox"> <input type="checkbox" value="remember-me"> Remember me </label> <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button> </form> </div> </body> </html>
聊天页面
<html> <head></head> <link rel='stylesheet' href='/stylesheets/bootstrap.css' /> <link rel='stylesheet' href='/stylesheets/qqface.css' /> <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 src="/javascripts/jquery.qqFace.js"></script> <script> $(function(){ var socket = io.connect() ; socket.on('message',function(msg){ $("#chatcontent").append("<p>"+msg+"</p>"); }); $("#sub").click(function(){ var con = $("#content").val(); if(con.length==0){ $("#tip").css('display','block'); } else{ $("#tip").css('display','none'); var uname = $("#username").val(); if(uname.length ==0){ uanme='二货'} ; //下面是‘组装’聊天记录里要显示的内容 var date = new Date(); var currdate = date.getFullYear()+'年'+date.getMonth()+'月'+date.getDate()+'日 '+date.getHours()+':'+date.getMinutes()+':'+date.getSeconds(); var title = currdate+' '+uname+'说:<br>' ; var sendcon = $("<div/>").html(replace_em(con)).html(); var msg = title+sendcon ; $("#content").val(''); $("#chatcontent").append("<p>"+msg+"</p>"); socket.send(msg); } }); $('.emotion').qqFace({ assign:'content', //给输入框赋值 path:'../face/' //表情图片存放的路径 }); }); //处理qq表情 ,数据库中可保存字符串，页面中利用此函数可以显示相应的图片 function replace_em(str){ str = str.replace(/\</g,'<；'); str = str.replace(/\>/g,'>；'); str = str.replace(/\n/g,'<；br/>；'); str = str.replace(/\[em_([0-9]*)\]/g,'<img src="face/$1.gif" border="0" />'); return str; } </script> <body> <div style="margin:0 auto;width:500px;"> <div class="panel panel-primary"> <div class="panel-heading"> <h3 class="panel-title">聊天记录</h3> </div> <div class="panel-body" style="height:300px;margin-top:20px;overflow-y:auto;" id="chatcontent"> </div> </div> <div class="alert alert-warning" id="tip" style="display:none;"> 发送内容不能为空! </div> <div class="panel panel-primary"> <div class="panel-heading"> <h3 class="panel-title">输入框</h3> </div> <div class="panel-body" style="height:250px;"> <input type="hidden" id="username" value="<%=username %>" > <textarea cols="74" rows="8" name="content" id="content"></textarea> <br /><br /> <div> <div style="float:left"><span class="emotion">表情</span></div> <div style="float:right;"><input type="button" class="btn btn-primary " value="发送" id="sub" /></div> </div> </div> </div> </div> </body> </html> 来自：http://my.oschina.net/u/1177710/blog/173175