我可以通过AJAX从外部页面加载数据吗？
[英]Can I load data from an external page via AJAX?
问题描述
I've just starting learning jQuery and AJAX. 
我刚开始学习jQuery和AJAX。 I'm able to load a local page (on my disk) into a div via jQuery.load() , but external sites don't seem to work. 我可以通过jQuery.load()将本地页面（在我的磁盘上）加载到div中，但外部站点似乎不起作用。 I've even used wireshark to check if the data is being sent from the server (it is). 我甚至使用wireshark来检查数据是否从服务器发送（它是）。 Sample code is below: 示例代码如下：
<html>
<head>
<script src='jquery-1.4.2.min.js'></script>
<script>
$(document).ready(function() {
// $('#test').load('localpage.htm'); works!
$('#test').load('http://www.google.com/'); // does not work!
});
</script>
</head>
<body>
<div id='test'></div>
</body>
</html>
Is it possible to do this in the first place? 首先可以做到这一点吗？ If so, how? 如果是这样，怎么样？
8 个解决方案
解决方案1
4 2010-03-09 14:18:54
You cannot do ajax calls to a different domain than the script originates from. 您不能对脚本来源之外的其他域执行ajax调用。
For doing such a thing, you have to use a proxy page on your own page, eg: 要做这样的事情，你必须在自己的页面上使用代理页面，例如：
<script>
$(document).ready(function() {
$('#test').load('ajax/getgoogle.php');
});
</script>
getgoogle.php: getgoogle.php：
<?php
echo file_get_contents("http://www.google.com/");
?>
解决方案2
3 已采纳 2010-03-09 14:18:31
解决方案3
2 2010-03-09 14:18:00
You're running into the Same Origin Policy . 你正在遇到同源政策 。 You can't access data from an external domain using AJAX, it's considered a security risk. 您无法使用AJAX从外部域访问数据，这被视为安全风险。 The reasoning behind it is that AJAX requests work with cookies stored by the browser -- if I tried to access facebook.com, and you were logged in there, the cookie would be sent and I'd have access to your personal data. 其背后的原因是AJAX请求使用浏览器存储的cookie - 如果我尝试访问facebook.com，并且您已登录，则会发送cookie并且我可以访问您的个人数据。
解决方案4
2 2010-03-09 14:18:46
For security reasons, you cannot use AJAX to request a page from a different domain (or protocol or port). 出于安全原因，您不能使用AJAX从不同的域（或协议或端口）请求页面。
Instead, you can write a server-side script on your server to forward requests to another domain. 相反，您可以在服务器上编写服务器端脚本以将请求转发到另一个域。 (This is not possible if you're running a page from a file:// url) （如果您从file://运行页面，则无法执行此file:// url）
解决方案5
2 2010-03-09 14:20:33
Ajax? 阿贾克斯？ Yes. 是。 XHR? XHR？ No (unless the browser implements Cross-site XHR which isn't widespread yet). 否 （除非浏览器实现了尚未普及的跨站点XHR ）。
To get the data with Ajax without using XHR the external site must provide the data in the JSONP format . 要在不使用XHR的情况下使用Ajax获取数据，外部站点必须提供JSONP格式的数据。
Alternatively, you can proxy the data through a server side script on your server, thus making it come from the same host (as far as JavaScript is concerned). 或者，您可以通过服务器上的服务器端脚本代理数据，从而使其来自同一主机（就JavaScript而言）。
解决方案6
2 2010-03-09 14:20:55
No, it's not. 不，这不对。 Have a look at Same Origin Policy . 看看同源政策 。 The site you are trying to request would need to have JSONP enabled for that to work, and you would utilize a cross-domain callback . 您尝试请求的站点需要启用JSONP才能工作，并且您将使用跨域回调 。 Alternatively, you could create a proxy on your own domain which grabs the page on behalf of your ajax request. 或者，您可以在自己的域上创建代理，代表您的ajax请求抓取页面。
解决方案7
1 2010-03-09 14:22:12
Load this PHP script instead of trying to load website directly 加载此PHP脚本，而不是尝试直接加载网站
$filename = "http://www.sitename.com";
$handle = fopen($filename, "r");
if ($handle)
{
while (!feof($handle))
{
$text .= fread($handle, 128);
}
fclose($handle);
}
print $text;
Edit: Or simply like henchman's solution with file_get_contents 编辑：或者只是喜欢henchman的file_get_contents解决方案
解决方案8
0 2010-03-09 14:17:19
You can't call Ajax from another domain. 您无法从其他域调用Ajax。 Check JSON technique for this 检查JSON技术
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