Re: XMLHttpRequest for "HEAD" dumps "no element found" errors

Martin Honnen wrote:
> 
> 
> Michael Vincent van Rantwijk wrote:
> 
>> I use somehing like this:
>>
>> var xmlhttp = new XMLHttpRequest();
>> xmlhttp.open("HEAD", aURL, false);
>> xmlhttp.onreadystatechange = function() {
>>  if (xmlhttp.readyState == 4) {
>>   return xmlhttp.getResponseHeader("Last-Modified");
>>  }
>> }
>> xmlhttp.send(null);
>>
>> and that works, but it throws JavaScript errors like this:
>>
>> Error: [JavaScript Error: "no element found" {file: 
>> "http://mozillazine.org/atom.xml" line: 1 column: 1 source: "
>> ^"}]
>> Source File: http://mozillazine.org/atom.xml
>> Line: 1, Column: 1
>> Source Code:
>> ^
> 
> I have tried with Mozilla 1.7.11 and no errors happen, but when I try 
> with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) 
> Gecko/20050806 Firefox/1.0+ I see the error so it looks like a 
> regression that happened on the trunk after 1.7. Although I don't know 
> whether something has changed with XMLHttpRequest and HEAD requests or 
> maybe only error reporting, lots of stuff nowadays ends up in the 
> JavaScript console although it is not a script error.

FYI: I don't get the error for HTML files, so maybe this is limited to 
XML files?

> Consider filing a bug on the issue and please post the bug number here.

I hope someone else can do that, because I don't know what component to 
use, and that's just one of the things I should know--but I don't.

Thanks,
Michael