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[Aaron Wells <1249166@xxxxxxxxxxxxxxxxxx>]

I've opened a separate bug to talk about the issue of mimetype detection
generally: https://bugs.launchpad.net/mahara/+bug/1249858

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https://bugs.launchpad.net/bugs/1249166

Title:
  embedding pdfs fail for some users using Firefox

Status in Mahara ePortfolio:
  Confirmed

Bug description:
  This looks to be related to mimetypes that handle pdfs

  The default mimetype, Portable Document Format (PDF) is:

   application/pdf

  However users are able to upload pdfs that end up with all manner of
  mimetypes, following is a list of saved mimetypes where the
  oldextention was 'pdf':

   "application/pdf"
   application/x-pdf
   application/force-download
   application/x-forcedownload
   application/x-msdownload
   application/x-octet-stream
   application/download
  application/x-download
   application/zip
   application/octet-stream
   application/x-unknown
   application/octetatream
   image/jpeg
   application/x-filler
   application/x-itunes-itlp
   binary/octet-stream
   application/x-msdownload
   application/download
   image/png
   text/html
   application/binary

  Some of them may simply be people putting wrong extension on their non
  .pdf file but the majority will be misdiagnosed pdfs.

  This is probably due to the php finfo function not being able to check correctly 
  https://bugs.php.net/bug.php?id=61940
  so Mahara is going by what the browser tells it and by looking at the list browsers lie.

  An example why browsers may be giving wrong info:

  The application/force-download content-type is from a user action.
  The user opened an URL that used this content-type to be sure that the browser displayed a file download dialog instead of displaying it inline with a PDF plugin. The user selected "save this decision" and the wrong content-type was saved in mimetypes.rdf.

  so the question is what to do?

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