[Building Sakai] Resource content type and version 1.5 PDFs

[Joshua Swink]

After more testing, I've ruled out the PDF version as the problem.
It's affecting some of our Firefox users. It is proving difficult to
pinpoint the difference in the user environments that is triggering
the problem - we have ruled out operating system and extensions.

I turned on DEBUG.org.sakaiproject.content logging but there was no
difference between a successfully identified upload and a failed one.

Josh

On Thu, Apr 22, 2010 at 10:39 AM, Matthew Jones <jonespm at umich.edu> wrote:
> As mentioned on KNL-101 the current mime detection scheme in sakai is:
> Browser (if supplied), File Extension (if exists), Unknown (last resort),
> So for some reason the browser must be not be providing a mime type for
> Sakai. Then it's still unable to recognize it based on the extension either
> because this extension file is missing or because of some other bug?
> The default lookup file for content type extensions for 2.6 is in
> config/localization/bundles/src/bundle/org/sakaiproject/localization/bundle/content_type/content_type_extensions.properties)
> I had proposed in this SAK a few methods of fixing this process;. Allowing
> the detection order to be changed (trusting extension over browser?) and
> also possibly detecting the mime type based on a library that does detection
> from the actual file contents. However I never got any feedback on the list
> or SAK, and it seems like a pretty big change to make without any
> discussion, so it's kind of just hung out there. It also might have needed
> an internal api change as mentioned as fixTypeAndId doesn't get passed the
> file contents to examine.
> -Matthew
> On Thu, Apr 22, 2010 at 1:20 PM, Joshua Swink <jswink at ucmerced.edu> wrote:
>>
>> Recently we've had some version 1.5 PDFs uploaded to resources, and
>> they're not recognized by Sakai. They are "unknown". Their filenames
>> end in ".pdf".
>>
>> Two questions. First, can we update our server's type recognition to
>> identify these files correctly? Second, shouldn't it be picking up on
>> the ".pdf" extension, even if the internal content of the file may not
>> be recognized?
>>
>> Josh
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