Home Web Front-end H5 Tutorial 基于 WebSocket 构建跨浏览器的实时应用

基于 WebSocket 构建跨浏览器的实时应用

May 17, 2016 am 09:08 AM

        Socket.IO 是一个功能非常强大的框架,能够帮助你构建基于 WebSocket 的跨浏览器的实时应用。支持主流浏览器,多种平台,多种传输模式,还可以集合 Exppress 框架构建各种功能复杂的实时应用。

基于 WebSocket 构建跨浏览器的实时应用


使用示例


1、使用 Node HTTP 服务器


服务端示例代码:


var app = require('http').createServer(handler)

  , io = require('socket.io').listen(app)

  , fs = require('fs')

 

app.listen(80);

 

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);

  });

});

客户端示例代码:


<script></script>

  var socket = io.connect('http://localhost');

  socket.on('news', function (data) {

    console.log(data);

    socket.emit('my other event', { my: 'data' });

  });


2、使用 Express 3 框架


服务端示例代码:


var app = require('express')()

  , server = require('http').createServer(app)

  , io = require('socket.io').listen(server);

 

server.listen(80);

 

app.get('/', function (req, res) {

  res.sendfile(__dirname + '/index.html');

});

 

io.sockets.on('connection', function (socket) {

  socket.emit('news', { hello: 'world' });

  socket.on('my other event', function (data) {

    console.log(data);

  });

});


客户端示例代码:

<script></script>

  var socket = io.connect('http://localhost');

  socket.on('news', function (data) {

    console.log(data);

    socket.emit('my other event', { my: 'data' });

  });

 


支持的传输


为了给各个不同的浏览器提供实时连接,Socket.IO 选择在运行时会自动最有能力的运输模式,不影响 API 的使用。


  • WebSocket
  • Adobe Flash Socket
  • AJAX 长轮询
  • AJAX 多重流
  • iframe
  • JSONP 轮询


支持的浏览器

桌面端

  • Internet Explorer 5.5+
  • Safari 3+
  • Google Chrome 4+
  • Firefox 3+
  • Opera 10.61+


移动端

  • iPhone Safari
  • iPad Safari
  • Android WebKit
  • WebOs WebKit

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