XHR abort() method not working in IE7.

[laurensonyourscreen]

When you call the abort() method on a jQuery XHR object. IE7 will raise an error. The error IE7 (version 7.0.6001.18000 to be exact) is giving is:

"Object doesn't support this property or method (line 5233)"

Looking into the jQuery source, it seems to fail on this peace of code:

" Override the abort handler, if we can (IE doesn't allow it, but that's OK) Opera doesn't fire onreadystatechange at all on abort try {

var oldAbort = xhr.abort; xhr.abort = function() {

if ( xhr ) {

oldAbort.call( xhr ); <-- here!

}

onreadystatechange( "abort" );

};

} catch(e) {console.log(e) } "

To reproduce this in IE7, I used this: " var xhr = $.ajax({

url: '​http://samedomain.com/', dataType: 'json'

});

xhr.abort(); "

I know the issue does not raise in Firefox 3.6.3. But I haven't tested it in other browsers.

[andrewbadr]

Discussion here ​http://forum.jquery.com/topic/object-doesn-t-support-this-property-or-method-from-jquery-1-4-1-in-ie7-only

[hallettj]

Possibly the same issue as ticket #6314.

So, this portion of jQuery is written with the assumption that xhr.abort() cannot be reassigned in IE. However, it turns out that under some circumstances xhr.abort() can be reassigned in IE - but the xhr methods in IE do not support a call() method so IE crashes when it hits that method call.

This can be fixed by borrowing the call() method from Function.prototype:

try {
	var oldAbort = xhr.abort;
	xhr.abort = function() {
		if ( xhr ) {
			if (oldAbort.call) {
				oldAbort.call( xhr );
			} else {
				Function.prototype.call.call(oldAbort, oldAbort, xhr);
			}
		}

		onreadystatechange( "abort" );
	};
} catch(e) { }

[hallettj]

patch for call() workaround

[hallettj]

Sorry, there was a mistake in the code in my last comment. The code is corrected in the attached patch. Here is what that code should have looked like:

try {
	var oldAbort = xhr.abort;
	xhr.abort = function() {
		if ( xhr ) {
			if (oldAbort.call) {
				oldAbort.call( xhr );
			} else {
				Function.prototype.call.call(oldAbort, xhr);
			}
		}

		onreadystatechange( "abort" );
	};
} catch( abortError ) {}

[chrispruett]

Confirmed that the above patch fixes this issue for me.

[snover]

Can you confirm the patch at ​9b655a176b0d045c3773357761acf2fa93cd9650 resolves this issue or is this still malfunctioning?

[trac-o-bot]

Automatically closed due to 14 days of inactivity.

[mleden@…]

Hi,

I think I am running into this bug with jQuery 1.4.2. How can I tell in which version the fix will be included?

Thx, -Mark

[jitter]

Replying to mleden@…:

Hi,

I think I am running into this bug with jQuery 1.4.2. How can I tell in which version the fix will be included?

Thx, -Mark

The commit snover linked to is included in 1.4.3. But you should try with the latest stable jQuery and maybe also the jQuery development version. Check ​http://docs.jquery.com/Downloading_jQuery for the links.

Can you then please report back here if the problem is fixed or if the issue remains request reopening and additionally provide a test case on ​http://jsfiddle.net showing the bug.

[anonymous]

I can confirm jQuery 1.4.4 solves the problem