检测X帧选项 [英] Detect X-Frame-Options

问题描述

有没有办法检测是否允许在iframe中加载页面？

Is there a way to detect whether or not a page is allowed to load within an iframe?

如果无法在iframe中加载网址，我希望让用户知道他们提交的网址在我们的网站上不起作用。

If a URL can not load within an iframe, I would like to let the user know that the URL they are submitting will not work on our site.

我试图获取内容，但这不起作用：

I have tried to get the contents, but that doesn't work:

$("iframe#data-url").on("load", function() {
    alert($(this).contents())
});

我不确定从哪里开始。

拒绝在 https://www.facebook.com/ 中显示因为它将'X-Frame-Options'设置为'DENY'。

Refused to display 'https://www.facebook.com/' in a frame because it set 'X-Frame-Options' to 'DENY'.

有没有办法检测 X-Frame-Options ？

推荐答案

因为您的脚本和目标网址位于不同的域中，JavaScript的跨域策略不允许您访问标头。几个月前我遇到了同样的问题，最后使用JavaScript向一个PHP文件发送一个AJAX请求，然后可以解析标题。

Because your script and the target URL are on different domains, JavaScript's cross domain policy won't let you access the headers. I ran into the same problem a few months ago and ended up using JavaScript to send an AJAX request to a PHP file which could then parse the headers.

这就是我的意思有PHP文件。然后，这将返回JSON数组中的结果。让我知道它是否有帮助！

This is what I had in the PHP file. This would then return the result in a JSON array. Let me know if it helps!

$error=false;
$urlhere='http://facebook.com';
$ch = curl_init();

$options = array(
        CURLOPT_URL            => $urlhere,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HEADER         => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_ENCODING       => "",
        CURLOPT_AUTOREFERER    => true,
        CURLOPT_CONNECTTIMEOUT => 120,
        CURLOPT_TIMEOUT        => 120,
        CURLOPT_MAXREDIRS      => 10,
);
curl_setopt_array($ch, $options);
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch);
$headers=substr($response, 0, $httpCode['header_size']);
if(strpos($headers, 'X-Frame-Options: deny')>-1||strpos($headers, 'X-Frame-Options: SAMEORIGIN')>-1) {
        $error=true;
}
$httpcode= curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo json_encode(array('httpcode'=>$httpcode, 'error'=>$error));

我知道这不是一个理想的回应，但我可以完成我的项目。

I know it's not an ideal response but it's all I could get to work with my project.

编辑： Bill ，如果您更改 strpos（） 到 stripos（） 您可能会获得更好的结果，因为它会运行不区分大小写的搜索。

As Bill stated below, if you change strpos() to stripos() you might get better results as it runs a case insensitive search instead.

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