頁面

Document

Status:

Server Data

js代碼

創建一個新的 EventSource 對象，然后規定發送更新的頁面的 URL(本例中是 "demo_sse.php")

每接收到一次更新，就會發生 onmessage 事件

當 onmessage 事件發生時，把已接收的數據推入 id 為 "result" 的元素中

var servarData,statusDiv;

var SERVER_URL= "WebForm1.aspx";

window.onload =function(){

servarData = document.getElementById("serverData");

statusDiv = document.getElementById("statusDiv")

startlistenServer();

}

function startlistenServer () {

statusDiv.innerHTML = "start connect"

var es = new EventSource(SERVER_URL);

es.onopen =openHandler;

es.onerror = erroHandler;

es.onmessage =messgeHandler;

}

function openHandler (e) {

statusDiv.innerHTML = "server open"

}

function erroHandler (e) {

statusDiv.innerHTML ="Error"

}

function messgeHandler (e) {

servarData.innerHTML = e.data;

}

net 后臺代碼

把報頭 "Content-Type" 設置為 "text/event-stream"

規定不對頁面進行緩存

輸出發送日期(始終以 "data: " 開頭)

向網頁刷新輸出數據

Response.ContentType = "text/event-stream";

Response.Expires = -1;

string str;

for (int i = 0; i < 100; i++)

{

str = "data:" + DateTime.Now.ToLongTimeString() + "\n\n";

Response.Write(str);

Thread.Sleep(1000);

Response.Flush();

}