Created
December 10, 2011 21:53
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Nodejs chat with socket.io
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| /* | |
| Websockets using http://socket.io/ | |
| Also with express web mvc framework http://expressjs.com/ | |
| */ | |
| var app = require('express').createServer(), | |
| io = require('socket.io').listen(app), | |
| port = 88; | |
| app.listen(port); | |
| // http routing: | |
| app.get('/', function (req, res) { | |
| res.sendfile(__dirname + '/index.html'); | |
| }); | |
| // socket events | |
| io.sockets.on('connection', function (socket) { | |
| socket.emit('toClient', { | |
| type: 'status', | |
| msg: 'Connection established' | |
| }); | |
| socket.on('toServer', function (data) { | |
| // do any required processing with incoming data | |
| // send data to others | |
| data.type = 'broadcast'; | |
| socket.broadcast.emit('toClient', data); | |
| // sned copy to self | |
| data.type = 'cc'; | |
| socket.emit('toClient', data); | |
| }); | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Socket chat</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <style> | |
| body { | |
| margin: 10px 10px; | |
| } | |
| #panel { | |
| width: 100%; | |
| margin: 0 0 5px 0; | |
| padding: 5px 0; | |
| height: 55px; | |
| border: 1px solid #ddd; | |
| overflow: auto; | |
| } | |
| #out p { | |
| padding: 0 5px; | |
| margin: 0; | |
| } | |
| p.status { | |
| color: green; | |
| font-style: italic; | |
| } | |
| p.broadcast { | |
| color: red; | |
| font-weight: bold; | |
| } | |
| p.cc { | |
| color: #999; | |
| } | |
| #input { | |
| display: block; | |
| width: 100%; | |
| padding: 5px 0; | |
| border: 1px solid #ddd; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <p>Socket chat</p> | |
| <div id="panel"> | |
| <div id="out"></div> | |
| </div> | |
| <input type="text" id="input"> | |
| <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script> | |
| <script src="/socket.io/socket.io.js"></script> | |
| <script> | |
| var chat = (function ($) { | |
| var socket, | |
| $panel, | |
| $output, | |
| $input; | |
| function init () { | |
| $panel = $('#panel'); | |
| $output = $('#out'); | |
| $input = $('#input'); | |
| $input.keypress(function (e) { | |
| if (e.which == 13 && this.value) { | |
| postMessage(this.value); | |
| this.value = ''; | |
| e.preventDefault(); | |
| } | |
| }); | |
| // TODO: failure handling | |
| socket = io.connect('http://localhost'); | |
| socket.on('toClient', receiveMessage); | |
| } | |
| function postMessage (msg) { | |
| socket.emit('toServer', { | |
| type: 'post', | |
| msg: msg | |
| }); | |
| } | |
| function receiveMessage (data) { | |
| var msg = data.msg || JSON.stringify(data), | |
| type = data.type; | |
| $output.append('<p class="' + type + '">' + msg + '</p>'); | |
| scrollPanel(); | |
| } | |
| function scrollPanel () { | |
| var diff = $output.height() - $panel.height(); | |
| if (diff > 0) { | |
| $panel.animate({scrollTop: '+=' + diff }, 300); | |
| } | |
| } | |
| $(init);// init on domReady | |
| // export nothing | |
| return {}; | |
| }(jQuery)); | |
| </script> | |
| </body> | |
| </html> |
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This is a basic chat server using node.js with the socket.io and express modules.