Adds XDomainRequest IE CORS support to jQuery

xdr.js

// Based on https://github.com/jaubourg/ajaxHooks/blob/master/src/ajax/xdr.js

(function( jQuery ) {

if ( window.XDomainRequest && !jQuery.support.cors ) {
	jQuery.ajaxTransport(function( s ) {
		if ( s.crossDomain && s.async ) {
			if ( s.timeout ) {
				s.xdrTimeout = s.timeout;
				delete s.timeout;
			}
			var xdr;
			return {
				send: function( _, complete ) {
					function callback( status, statusText, responses, responseHeaders ) {
						xdr.onload = xdr.onerror = xdr.ontimeout = xdr.onprogress = jQuery.noop;
						xdr = undefined;
						jQuery.event.trigger( "ajaxStop" );
						complete( status, statusText, responses, responseHeaders );
					}
					xdr = new XDomainRequest();
					xdr.open( s.type, s.url );
					xdr.onload = function() {
						var status = 200;
						var message = xdr.responseText;
						var r = JSON.parse(xdr.responseText);
						if (r.StatusCode && r.Message) {
							status = r.StatusCode;
							message = r.Message;
						}
						callback( status , message, { text: message }, "Content-Type: " + xdr.contentType );
					};
					xdr.onerror = function() {
						callback( 500, "Unable to Process Data" );
					};
					xdr.onprogress = function() {};
					if ( s.xdrTimeout ) {
						xdr.ontimeout = function() {
							callback( 0, "timeout" );
						};
						xdr.timeout = s.xdrTimeout;
					}
					xdr.send( ( s.hasContent && s.data ) || null );
				},
				abort: function() {
					if ( xdr ) {
						xdr.onerror = jQuery.noop();
						xdr.abort();
					}
				}
			};
		}
	});
}
})( jQuery );

26: var r = JSON.parse(xdr.responseText);

is it correct to assume that all responses are going to be JSON?

This works fine on my work network. It fails when using my 3G mobile network. Why is this so ? EI9

I am getting an error....'JSON' is undefined .....at line 26

THANKS

I spent a full day to fix an issue with ie. I really appreciate you shared this code, Thanks!! 😃

Thanks, it really helps a lot!