为什么jquery .load（）不从外部网站加载文本文件？
[英]Why doesn't jquery .load() load a text file from an external website?
问题描述
In the example below, when I click the button, it says "Load was performed" but no text is shown . 
在下面的示例中，当我单击按钮时，它说“已执行加载”，但未显示任何文本 。
I have a clientaccesspolicy.xml in the root directory and am able to asynchronously load the same file from silverlight . 我在根目录中有一个clientaccesspolicy.xml ，并且能够从silverlight异步加载相同的文件。 So I would think I should be able to access from AJAX as well. 因此，我认为我也应该能够从AJAX进行访问。
What do I have to change so that the text of the file http://www.tanguay.info/knowsite/data.txt is properly displayed in the #content element? 我必须更改什么，才能在#content元素中正确显示文件http://www.tanguay.info/knowsite/data.txt的文本？
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript"
src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("jquery", "1.3.2");
google.setOnLoadCallback(function() {
$('#loadButton').click(loadDataFromExernalWebsite);
});
function loadDataFromExernalWebsite() {
$('#content').load('http://www.tanguay.info/knowsite/data.txt', function() {
alert('Load was performed.');
});
}
</script>
</head>
<body>
<p>Click the button to load content:</p>
<p id="content"></p>
<input id="loadButton" type="button" value="load content"/>
</body>
</html>
2 个解决方案
解决方案1
4 2010-04-29 04:01:19
Clientaccesspolicy has no affect on javascript. Clientaccesspolicy对javascript没有影响。 Most (maybe all?) modern browsers will prevent you from running cross-site-scripting, as it is a security risk. 大多数（也许是所有？）现代浏览器都会阻止您运行跨站点脚本，因为这存在安全风险。
Your alternative is to proxy that site through a file on your own site, like /proxy.php?loadurl=http://theothersite.com and then call that file via the Javascript, which would be allowed since it is from your domain. 您的替代方法是通过自己站点上的文件（例如/proxy.php?loadurl=http://theothersite.com代理该站点，然后通过Javascript调用该文件，这是允许的，因为它来自您的域。
解决方案2
1 2010-04-29 03:58:11
I don't think any browser obeys clientaccesspolicy.xml or crossdomain.xml for XMLHttpRequest. 我不认为任何浏览器都遵循XMLHttpRequest的clientaccesspolicy.xml或crossdomain.xml 。
There are other mechanisms you can look at, such as Cross-Origin Resource Sharing . 您还可以查看其他机制，例如“ 跨域资源共享” 。 This is supported by Firefox 3.5 and later. Firefox 3.5和更高版本支持此功能。
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