当 WebKit 和 Opera 位于框架中时，不会从此服务器加载
此网站在 Firefox 中可以正常加载，但在 WebKit 浏览器（Safari 和 Google Chrome）中则无法加载框架，而在 Opera 中我收到此错误：“该网站不允许其内容显示在框架中。它必须显示在单独的窗口中。”。我不希望能够真正解决这个问题，因为我无法控制框架页面（只能控制框架的内容），但我的问题是：为什么？
框架的内容本身可以正常加载，并保存框架页面并将框架的src更改为< a href="http://w3.org/" rel="nofollow noreferrer">http://w3.org/ 加载正常。我根据 Opera 错误进行了一些搜索，似乎表明它与重定向有关。该网址确实会重定向，但如果我将其更改为 http://mini.milli.no/tonje/ main （不重定向），它仍然不起作用。甚至 Apache 目录列表也不起作用 - 对我来说这表明它与服务器相关。但服务器如何才能做到这一点呢？
为了完全清楚，我使用的是 Mac OS X 10.6.3，并使用 Safari 4.0.5、Chrome 5.0.375.55、Opera 10.53 和 Firefox 3.6.3 进行了测试。基本上，这是目前所有这些东西中最新的。
This site loads fine in Firefox, but in WebKit browsers (Safari and Google Chrome) it won't load the frame, and in Opera I get this error: "The Web site does not permit its content to be displayed in a frame. It must be displayed in a separate window.". I don't expect to be able to actually fix this, as I don't have control over the frames page (only the content of the frame), but my question is: why?
The content of the frame loads fine by itself, and saving the frames page and changing the src of the frame to http://w3.org/ loads fine. I did a bit of searching based on the Opera error, and it seemed to suggest it had to do with redirecting. That URL does indeed redirect, but if I change it to http://mini.milli.no/tonje/main (which doesn't redirect), it still doesn't work. Even Apache directory listings don't work - which to me suggests it's server related. But how can a server do that?
To be total clear, I'm using Mac OS X 10.6.3, and I tested with Safari 4.0.5, Chrome 5.0.375.55, Opera 10.53, and Firefox 3.6.3. Basically, the newest of all of those things currently.
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该站点在响应中设置以下标头
这是一个相对较新的标头，已添加以防止 ClickJacking，请参阅 链接了解更多信息
The site sets the following header in the response
This is a relatively new header that has been added to prevent ClickJacking, see Link for more info