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Date: Fri, 24 Aug 2012 23:59:05 +0200
From: Andrea Pescetti <pescetti@apache.org>
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To: ooo-dev@incubator.apache.org
Subject: Re: Extension downloading problem
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Dave Fisher wrote:
> Has anyone inspected the MIME Type returned? If it is not a proper
> one for OXT then it is possible that IE8 is doing detection of the
> type.

I had different results than Dave's, and I concluded I see different 
MIME types depending on the mirror I get, so this depends on how each 
individual mirror used by SourceForge is configured.

Example with repeated attempts (strings are in Italian but it's easy to 
understand that the first and last one are right, the other mirrors are 
not):

$ wget http://extensions.openoffice.org/e-files/874/29/oracle-pdfimport.oxt
Posizione: 
http://ignum.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt 
[segue]
Lunghezza: 4899523 (4,7M) [application/vnd.openofficeorg.extension]

$ wget http://extensions.openoffice.org/e-files/874/29/oracle-pdfimport.oxt
Posizione: 
http://garr.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt 
[segue]
Lunghezza: 4899523 (4,7M) [application/octet-stream]

$ wget http://extensions.openoffice.org/e-files/874/29/oracle-pdfimport.oxt
Posizione: 
http://heanet.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt 
[segue]
Lunghezza: 4899523 (4,7M) [application/octet-stream]

$ wget http://extensions.openoffice.org/e-files/874/29/oracle-pdfimport.oxt
Posizione: 
http://dfn.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt 
[segue]
Lunghezza: 4899523 (4,7M) [application/octet-stream]

$ wget http://extensions.openoffice.org/e-files/874/29/oracle-pdfimport.oxt
Posizione: 
http://freefr.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt 
[segue]
Lunghezza: 4899523 (4,7M) [application/vnd.openofficeorg.extension]

MIME types are defined at the web server level, so the configuration for 
each mirror is probably responsible for this difference. Then most 
browsers will get it right nevertheless, but some might be tricked by 
receiving the generic "octet-stream" type and interpreting it as a valid 
ZIP file (which is correct, but not the best thing to do of course) 
before checking if it is a valid OXT file as well.

A simple test could be to ask people who report problems if they get 
different behaviors with
http://garr.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt
(which serves OXT as octet/stream) and
http://freefr.dl.sourceforge.net/project/aoo-extensions/874/29/oracle-pdfimport.oxt
(which serves OXT as application/vnd.openofficeorg.extension).

Regards,
   Andrea.