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From Alexandre Mazouz <alexandre.maz...@gmail.com>
Subject Re: Firefox 3 and URL
Date Mon, 04 Aug 2008 12:23:54 GMT

I use the plugin Firebug to debug my web application.

I understand that Head request do not send response but Firebug shows me
something else in FF2.

I use Cocoon 2.1.7/Jetty/sarissa  0.9.4.4.

Thanks,
Alexandre


Andy Stevens-2 wrote:
> 
> 2008/8/4 Alexandre Mazouz <alexandre.mazouz@gmail.com>:
>>
>> Okay,
>>
>> My problem is now fixed.
>>
>> Instead of using HEAD request, i have used GET request :
>>
>> this.xmlHttp.open("GET", resourceName, false);
>> this.xmlHttp.send(null);
>>
>> I think that Firefox 2.0 and Firefox 3.0 have different behaviour of how
>> to
>> handle request.
>>
>> For FF3
>> *In the case of this.xmlHttp.open("HEAD", resourceName, false); : i have
>> no
>> responseXML (null)
>> *In the case of this.xmlHttp.open("GET", resourceName, false); : i have
>> responseXML
>>
>> For FF2
>> *In the case of this.xmlHttp.open("HEAD", resourceName, false); : i have
>> responseXML
>> *In the case of this.xmlHttp.open("GET", resourceName, false); : i have
>> responseXML
>>
>> Why this different behavior?
> 
> Given the point of a HEAD request is to fetch the response headers
> without the actual body [1], I'm surprised you expected responseXML to
> contain anything in the first place.  Are you sure the XHR
> open("HEAD", ...) in FF2 is actually sending a HEAD and not using a
> GET anyway?  It could be that version doesn't support HEAD and falls
> back on the other method, and they've improved things by v3.  I'd be
> tempted to try a packet sniffer or the Live HTTP Headers extension to
> see exactly what gets sent & received.  Also check the web server
> access logs to see what method it thinks was used in each case.  I'd
> be surprised if the server responded differently to HEAD requests
> according to the browser version, returning the content body in one
> case and not the other.  What server software are you using anyway?
> 
> 
> Andy.
> [1] http://en.wikipedia.org/wiki/HTTP_HEAD_request#Request_methods
> -- 
> http://pseudoq.sourceforge.net/  Open source java Sudoku application
> 
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