如何获取iframe响应标头？

Question

Is there a way to get response headers of an iframe onload?

I have already googled it, but really I could not find something useful about it!

Answer 1

Not really. If the iframe is on the same domain you can access its document object which contains some useful information such as document.referrer , but you cannot intercept the full HTTP headers without making an Ajax request for the URL. This would mean requesting the URL again. eg:

$.ajax( { url: $(#myFrame).attr('src'), success: function(r,x){
    console.log( x.getResponseHeader('SomeHeader') );
} } );

This will only work if the iframe src is in the same domain as the calling script.