Don't trust the browser-provided mimetype if it looks bogus.

Review Request #6118 — Created July 19, 2014 and submitted — Latest diff uploaded

Information

Review Board
release-2.0.x
d1d8ec2...

Reviewers

A user was reporting that their PDF file uploads were being assigned the
mimetype of "text/text/application/pdf", which is completely bogus. If
splitting on '/' produces anything other than a list of two strings, don't
allow it to proceed.

Ran unit tests.