beforeSend is ignored in Firefox 3 with JQuery 1.3.1

Reported by:	radu3000	Owned by:
Priority:	undecided	Milestone:	1.3.2
Component:	ajax	Version:	1.3.1
Keywords:	beforeSend ajax request header	Cc:	radu_marian@yahoo.com
Blocked by:		Blocking:

Description

I am not able to set any request headers inside beforeSend. See complete example below:

<html>

<head>

<title>Hello.html</title>

$.ajax({

url: "http://api.cnet.com/restApi/v1.0/techProduct?productId=32069546&iod=none&viewType=json&partKey=19926949750937665684988687810562",

dataType: "jsonp",

beforeSend: function(xhr){

alert('help - i am ignored');

xhr.setRequestHeader('myCustomHeader', '100');

success: function(data){

alert(data.CNETResponse.TechProduct.EditorsRating.$);

$("div#html").append(data.CNETResponse.TechProduct.EditorsRating.$);

}

});

</script>

</head>

<body>

<fieldset><legend>Loaded from an test.html file</legend>

<h1>Hello!</h1>

</div>

</fieldset>

</body>

</html>

Attachments (0)

Change History (4)

Changed February 11, 2009 06:33PM UTC by radu3000 comment:1

JSONP is not using XMLHttpRequest at all - like the following post says already: http://groups.google.com/group/jquery-dev/browse_thread/thread/e7eb4a23eef342fb

Too bad there is not enough documentation in the jQuery API.

Regards,

Radu.

Changed February 15, 2009 05:53PM UTC by dmethvin comment:2

resolution:	→ fixed
status:	new → closed

I have updated the documentation to reflect the implementation. In particular, since they are implemented via a script tag the cross-domain requests do not provide an XHR object in their callbacks and do not fire beforeSend or processData.

http://docs.jquery.com/Ajax/jQuery.ajax

Changed July 14, 2009 02:43AM UTC by dandv comment:3

resolution:	fixed
status:	closed → reopened

If JSONP requests are done via <script src=>, and are not using XMLHttpRequest at all, is there a use case for providing the 'jsonp' option for jQuery.ajax?

I might be wrong, but when doing a JSONP request, there's nothing to specify to jQuery.ajax that one can't do in jQuery.getJSON. In that case, the 'jsonp' option is confusing (I came here for the same reason, that beforeSend was never called).

Changed November 18, 2009 02:41AM UTC by dmethvin comment:4

resolution:	→ fixed
status:	reopened → closed

This is working as documented; it's just not possible to set request headers on a jsonp request.

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