[Building Sakai] Resource content type and version 1.5 PDFs

[Matthew Jones]

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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