socket.io的抽象实现：engine.io

engine.io是一个socket.io的抽象实现，作为socket.io的服务器和浏览器之间交换的数据的传输层。它不会取代Socket.IO，它只是抽象出固有的复杂性，支持多种浏览器，设备和网络的实时数据交换。Server (A) Listening on a port

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var engine = require('engine.io')

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  , server = engine.listen(80)

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server.on('connection', function (socket) {

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  socket.send('utf 8 string');

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});

(B) Intercepting requests for a http.Server

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var engine = require('engine.io')

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  , http = require('http').createServer().listen(3000)

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  , server = engine.attach(http)

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server.on('connection', function (socket) {

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  socket.on('message', function () { });

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  socket.on('close', function () { });

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});

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var engine = require('engine.io')

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  , server = new engine.Server()

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server.on('connection', function (socket) {

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  socket.send('hi');

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});

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// …

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httpServer.on('upgrade', function (req, socket, head) {

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  server.handleUpgrade(req, socket, head);

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});

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httpServer.on('request', function (req, res) {

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  server.handleRequest(req, res);

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});

Client

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<script src="/path/to/engine.io.js"></script>

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<script>

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  var socket = new eio.Socket('ws://localhost/');

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  socket.on('open', function () {

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    socket.on('message', function (data) { });

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    socket.on('close', function () { });

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  });

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</script>

项目主页：http://www.open-open.com/lib/view/home/1384093598133