防止JavaScript文件上的缓存
[英]Preventing Cache on JavaScript files
问题描述
I'm trying to prevent 2 JavaScript files from being cached by the browser. 
我正在尝试阻止2个JavaScript文件被浏览器缓存。
I've tryed to use <META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE"> without success. 我尝试使用<META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">但没有成功。 Here's my <head> element code: 这是我的<head>元素代码：
<head>
<meta charset="UTF-8">
<meta http-equiv="Cache-control" content="NO-CACHE">
<link type='text/css' href='/files/theme/popup_basic.css' rel='stylesheet' media='screen' />
<!-- JavaScript Start -->
<script type="text/javascript" src="/files/theme/gohome.js"></script>
<script type="text/javascript" src="http://192.168.0.149/redirect.js"></script>
<!-- JavaScript End -->
</head>
From my understating, this should work. 从我的低估，这应该工作。 But the redirect.js file keeps being cached! 但redirect.js文件一直在缓存！
Anyone know what I'm doing wrong? 谁知道我做错了什么？
1 个解决方案
解决方案1
14 已采纳 2013-03-07 17:34:49
The <meta http-equiv="Cache-control" content="NO-CACHE"> , the directive CACHE-CONTROL:NO-CACHE indicates cached information should not be used and instead requests should be forwarded to the origin server. <meta http-equiv="Cache-control" content="NO-CACHE"> ，指令CACHE-CONTROL：NO-CACHE表示不应使用缓存信息，而是应将请求转发到源服务器。
In order to prevent cache on every request, you may need to add some random string in url. 为了防止每个请求缓存，您可能需要在url中添加一些随机字符串。 The example below is use javascript to dynamic create a script tag and adding random number in the url, then append it. 下面的示例是使用javascript动态创建脚本标记并在URL中添加随机数，然后附加它。
<script language="JavaScript">
var s=document.getElementsByTagName('script')[0];
var sc=document.createElement('script');
sc.type='text/javascript';
sc.async=true;
sc.src='http://192.168.0.149/redirect.js?v' + Math.random();
s.parentNode.insertBefore(sc,s);
</script>
If just want to prevent 1 time only, just append some string to the src. 如果只想防止1次，只需将一些字符串附加到src即可。
<script src="http://192.168.0.149/redirect.js?12345678"></script>
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