iFrame not loading URL

Question

I am using the following simple iFrame code to load Yahoo but it's not loading anyway. in Chrome Inspector I see the URL status as 301 first and then cancel. Any idea why is it happening?

<iframe name="iframe1" src="http://yahoo.com"></iframe> 

Answer 1

You probably get an error message in the log that reads something like this:

"Refused to display document because display forbidden by X-Frame-Options."

To answer your question:

Yahoo is doing this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites.

For more info read this: https://developer.mozilla.org/en/The_X-FRAME-OPTIONS_response_header

Answer 2

Its also very easy to ask site not to load if you are in an iframe with simple javascript. For example, twitter does this

<script type="text/javascript"> //<![CDATA[     if (window.top !== window.self) {         document.write = "";         window.top.location = window.self.location;         setTimeout(function () {             document.body.innerHTML = '';         }, 1);         window.self.onload = function (evt) {             document.body.innerHTML = '';         };      } //]]> </script> 

I did not see a console error here and so I guess this is the case here.

The Yahoo! JavaScript is obfuscated but you can see they are definitely removing something at this snippet. (Code taken from yahoo website)

if(self!==self.top){b=function(){if(g.readyState=="complete"){f.remove(g,e,b);