[horde] client mime-type mismatch

[Michael M Slusarz]

Quoting Michael Rubinsky <mrubinsk at horde.org>:

> Quoting Andrew Morgan <morgan at orst.edu>:
>
>> Funny story...
>>
>> Our Exchange admin contacted me with an attachment problem that he  
>> thought was originating in Horde.  Apparently messages sent to  
>> Exchange containing attachments with the wrong mime-type were  
>> getting stuck in the message transport system.  They were not being  
>> delivered to a mailbox nor bounced to the sender.  When he rebooted  
>> the Exchange server recently to apply patches, suddenly all these  
>> ancient messages were bounced to sender.
>>
>> The attachments were PDF files that had the mime-type  
>> "application/applefile".
>>
>> I was able to replicate this problem on my own computer and started  
>> searching in Horde for some problem with mime-type detection.   
>> Finally I realized that it was my own browser sending the wrong  
>> mime-type!  When I looked in Firefox's content-type handling, I saw:
>>
>> PDF File (application/applefile)	Always Ask
>> PDF File (application/pdf)		Open with xpdf
>>
>> Once I edited the mimeTypes.rdf file to remove all applefile  
>> references, the problem was fixed (for me).
>>
>> Obviously, Horde is using the mime-type reported by the client  
>> browser. Is that still a good idea, or would it be better if Horde  
>> used it own mime detection (or fileinfo) on all uploaded files?
>>
>> Finally, does anyone know how I got that crazy mime-type in Firefox?
>
> Yup. This is a known issue with FF and has been discussed a few  
> times on our mailing lists. In fact, there was a recent discussion  
> about replacing client side with server side detection. See the  
> following for the start of the thread:
>
> http://lists.horde.org/archives/dev/Week-of-Mon-20100111/024651.html

...or just skip ahead and see the solution (IMP 5 only):

http://lists.horde.org/archives/commits/2010-January/002854.html

michael

-- 
___________________________________
Michael Slusarz [slusarz at horde.org]