310602 - access of type property of event object in onprogress handler yields error NS_ERROR_FAILURE 0x80004005

Status: RESOLVED FIXED

(Core :: XML, defect)

Description

[Martin Honnen]

Someone has implemented an onprogress event handler for XMLHttpRequest object
but when script tries to use that to access evt.type as you could use with any
other event handler where the event object argument passed in has a type
property the following error occurs in the JavaScript console:

Error: [Exception... "Component returned failure code: 0x80004005
(NS_ERROR_FAILURE) [nsIDOMEvent.type]"  nsresult: "0x80004005
(NS_ERROR_FAILURE)"  location: "JS frame ::
http://home.arcor.de/martin.honnen/mozillaBugs/domLevel3/progressEventTypeProblem1.xhtml
:: anonymous :: line 37"  data: no]
Source File:
http://home.arcor.de/martin.honnen/mozillaBugs/domLevel3/progressEventTypeProblem1.xhtml
Line: 37

There is no specification as far as I know for XMLHttpRequest but if client-side
script can use that event handler I think the event object should have a type
property the script can access which gives a string with e.g. 'progress'.

I file this on the XML component in Core as so far the onprogress handler seems
to be specific to XMLHttpRequest. If it belongs in DOM Level 3 Load and Save
then please reassign.

Problem occurs with latest Firefox trunk nightly (Mozilla/5.0 (Windows; U;
Windows NT 5.1; en-US; rv:1.9a1) Gecko/20050930 Firefox/1.6a1) but also with 1.8
branch builds.

Comment 1

[Boris Zbarsky [:bzbarsky]]

The patch in bug 198595 fixes this.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Fixed by checkin for bug 198595