html5的websocket

转载：http://blog.csdn.net/liuhe688/article/details/50496780

var WebSocketServer = require('ws').Server;
var socket = new WebSocket('ws://www.websocket-testing.com:9000/server', 'subprotocol');
socket.onopen = function(e) {
    console.log('websocket connection has established');
}
//send message to websocket server
socket.send('hello, server');

//receive message from websocket server
socket.onmessage = function(e){
    //obtain the message from server
    var message = e.data;

    //do something
}

//cut off the connection
socket.close();

socket.onclose = function(e){
    //do something
}
//监听到失败后重新连接
socket.onclose = function() {
    setTimeout(function() {
        //reconnect operation
    }, 100000);
}

Web Workers 一次任务然后就关闭了。

var w;

function startWorker()
{
if(typeof(Worker)!=="undefined")
  {
  if(typeof(w)=="undefined")
  {
  w=new Worker("/example/html5/demo_workers.js");
  }
  w.onmessage = function (event) {
    document.getElementById("result").innerHTML=event.data;
    };
  }
else
  {
  document.getElementById("result").innerHTML="Sorry, your browser does not support Web Workers...";
  }
}

function stopWorker()
{
w.terminate();
}

Server-Sent 事件 - 单向消息传递

Server-Sent 事件指的是网页自动获取来自服务器的更新。

var source=new EventSource("demo_sse.php");
source.onmessage=function(event)
  {
  document.getElementById("result").innerHTML+=event.data + "<br />";
  };

　　

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