检测YouTube是否被公司/ ISP阻止 [英] Detecting if YouTube is blocked by company / ISP

问题描述

我们在某个网站上放置了YouTube视频，并希望检查是否有可能由于（大多数情况下）公司政策或其他原因而无法查看这些视频。

我们有两个站点：$ b​​
$ 1）Flex / Flash
2）HTML

我想用Flex我可以尝试下载 http://youtube.com/crossdomain.xml ，如果它是有效的XML假设该网站是可用的

但与HTML我不知道该怎么做。我甚至不能想到一个很好的黑客。

解决方案

我喜欢缺乏解决方案，但是， a href =http://en.wikipedia.org/wiki/Race_condition =noreferrertitle =维基百科竞赛条件>竞赛条件。
这将工作，不会创建一个竞赛的关系：

  var image = new Image（）; 
 image.onload = function（）{
 //用户可以访问youbube 
}; 
 image.onerror = function（）{
 //用户不能访问youbube 
}; 
 image.src =http://youtube.com/favicon.ico; 
  

We have YouTube videos on a site and want to detect if it is likely that they will not be able to view them due to (mostly likely) company policy or otherwise.

We have two sites:

1) Flex / Flash 2) HTML

I think with Flex I can attempt to download http://youtube.com/crossdomain.xml and if it is valid XML assume the site is available

But with HTML I don't know how to do it. I can't even think of a 'nice hack'.

解决方案

I like lacker's solution, but yes, it creates a race condition. This will work and won't create a race contition:

var image = new Image();
image.onload = function(){
// The user can access youtube
};
image.onerror = function(){
// The user can't access youtube
};
image.src = "http://youtube.com/favicon.ico";

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