IE 7 can't request file:// via XHR

[john]

This is a known bug: ​http://xhab.blogspot.com/2006/11/ie7-support-for-xmlhttprequest.html

Essentially, you have to never use the new XHR interface presented in IE7, and just use the old ActiveX stuff instead.

[steveivy@…]

John, would someone who had IE7 from Vista, for example, even have the old AciveX object? Could the code that loads the XHR stuff figure out if the url is a file: url or not and only try the old activex object if it needs to?

[steveivy@…]

Simplistically,this may do it: (from jquery-latest.js)

1887    if ( window.ActiveXObject || !window.XMLHttpRequest )
1888        XMLHttpRequest = function(){
1889            return new ActiveXObject("Microsoft.XMLHTTP");
1890        };

[joern]

Hard to write a test for this.

Assuming there is no browser that offers an ActiveXObject without supporting the XMLHTTP argument, this should do the trick:

if ( window.ActiveXObject )
       XMLHttpRequest = function(){
            return new ActiveXObject("Microsoft.XMLHTTP");
       };

[john]

This has been fixed in SVN (by joern).