javascript ajax擷取資訊功能代碼

最後更新：2018-12-08 來源：互聯網

上載者：User

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Client端代碼如下：複製代碼代碼如下:<html>
<head>
<script language="javascript"><!--
function getit(){
if(document.getElementById("url").value==""){
alert("Enter url!");
return false;
}
if(document.getElementById("count").value==""){
alert("Enter count!");
return false;
}
if(document.getElementById("num").value==""){
alert("Enter num!");
return false;
}
if(document.getElementById("end").value==""){
alert("Enter end!");
return false;
}
var url=document.getElementById("url").value;
var count=document.getElementById("count").value;
var num=document.getElementById("num").value;
var end=document.getElementById("end").value;
sendCall(url,count,num,end);
}
function sendCall(url,count,num,end) {
if (parseInt(num)>=parseInt(end)){return false;}
var nurl=url+"?count="+count+"&num="+num;
//alert(nurl);
//window.open(nurl);
var xmlHttp;
if (window.ActiveXObject) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} else if (window.XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
//解決FF中跨域問題
try{
netscape.security.PrivilegeManager.enablePrivilege( "UniversalBrowserRead ");
} catch (e) {
alert( "Permission UniversalBrowserRead denied. ");
}
}

xmlHttp.onreadystatechange = function() {
if(xmlHttp.readyState == 4 && xmlHttp.status ==200){
var str = xmlHttp.responseText;
var msg=document.getElementById("getmsg");
if(str.match(/thereisnothing/)) {
msg.innerHTML = "資料已經完成傳輸！"
}else{
//msg.innerHTML =str;
write(str,count,num);
var next=parseInt(num)+parseInt(count);
sendCall(url,count,next,end);
}
}
}

xmlHttp.open('POST', nurl, true);
//xmlHttp.setRequestHeader("Content-Type", "text/xml");
//xmlHttp.setRequestHeader("charset", "utf-8");
xmlHttp.send(null);
}
function write(str,count,num){
var fso = new ActiveXObject("Scripting.FileSystemObject");
var end = parseInt(num)+parseInt(count);
var name = "e:\\"+num+"-"+end+".txt";
var a = fso.CreateTextFile(name, true);
a.WriteLine(str);
a.Close();
//alert("我已經在你的E盤根目錄下產生了一個"+name+"的檔案！");
document.getElementById("num").value=end;
var msg=document.getElementById("getmsg");
msg.innerHTML="我已經在你的E盤根目錄下產生了一個"+name+"的檔案！";
}
// -->
</script>
</head>
<body>

<div>
Enter the setup then get the info:
</div>

<br><br>
→ how many once：<input name="count" id="count" type="text" value="1000" size="30" /><br><br>
→ begin num ：<input name="num" id="num" type="text" value="0" size="30" /><br><br>
→ end num ：<input name="end" id="end" type="text" value="100" size="30" /><br><br>
</body></html>

功能可以改進，改進以後防止網路擁堵導致的擷取資訊失敗而造成的不連續，可以改進成實現很多功能的工具，比如刷票...自己發揮，我只提供思路~

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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