<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <h1>获取服务端更新数据</h1> <div id="result"></div> <script type="text/javascript"> if (typeof (EventSource) !== "undefined") { var source = new EventSource("data.aspx"); source.onmessage = function (event) { document.getElementById("result").innerHTML += event.data + "<br>"; }; source.onerror = function (event) { console.log("error"+event); } source.onopen = function () { console.log(‘开始连接‘); } } else { document.getElementById("result").innerHTML = "抱歉，你的浏览器不支持 server-sent 事件..."; } </script> </body> </html>
原文：http://www.cnblogs.com/tiancai/p/5834169.html