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js判断请求的url是否可访问，支持跨域判断

2015-10-29 13:43 686 查看

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />

<meta name="keywords" content="js判断URL是否可访问" />

<title>js判断URL是否可访问</title>

</head>

<body>

<div>检验的url地址：</div>

<input type="text" style="width:600px;height:30px;font-size:14px;" id="urlText" value="https://www.baidu.com/" />

  <input type="button" value="判断是否可访问" onclick="getURL()" />

<br />

<div id="msg1"></div>

<div id="msg"></div>

<script type="text/javascript" src="js/jquery-1.10.2.js"></script>

<script type="text/javascript">

function getURL() {

$("#msg").html("");

var url = $("#urlText").val();//请求的url

var dateTime = disptime();

var time2 = dateTime.DateTime;

$("#msg1").html("发送时间：" + time2);

$.ajax({

type: 'get',

url: url,

cache: false,

dataType: "jsonp", //跨域采用jsonp方式

processData: false,

timeout:10000, //超时时间，毫秒

complete: function (data) {

var dateTime2 = disptime();

var time22 = dateTime2.DateTime;

var htmlTxt =[];

if (data.status==200) {

htmlTxt.push("成功<br/>");

} else {

htmlTxt.push("失败<br/>");

}

htmlTxt.push("readyState=" + data.readyState + "<br/>status=" + data.status + "<br/>statusText=" + data.statusText + "<br/>响应时间：" + time22);

var htmlString = htmlTxt.join('');

$("#msg").html(htmlString);

}

});

}

function disptime() {

var date = new Date();

var yyyy = date.getFullYear();//四位年份

var month = date.getMonth() + 1;//月份 0-11

var day = date.getDate();//日

var HH = date.getHours();//时

var minute = date.getMinutes();//分钟

var second = date.getSeconds();//秒

var milliseconds=date.getMilliseconds();//毫秒

if (month < 10) {

mont
4000
h = "0" + month;

}

if (day < 10) {

day = "0" + day;

}

if (HH < 10) {

HH = "0" + HH;

}

if (minute < 10) {

minute = "0" + minute;

}

if (second < 10) {

second = "0" + second;

}

var time = yyyy + "-" + month + "-" + day + " " + HH + ":" + minute + ":" + second + " " + milliseconds;

var timeTxt = yyyy + month + day + HH + minute + second;

var time = {

DateTime: time,

TimeTxt: timeTxt

}

return time;

}

</script>

</body>

</html>

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