I've just had a bug reported against PyXDG that a Mimetype test is
returning image/x-apple-ios-png instead of image/png.
Looking at the XML mime type definitions [0], this new mime type ('Apple
broken PNGs') has the same glob as regular pngs: *.png. They can be
distinguished by magic sniffing, but the test in question is specifically
for when only a filename is available.
Obviously, a filename like foo.png should be presumed to be image/png over
image/x-apple-ios-png. But how should this be done? Should we prefer
mimetypes without the x- prefix? Could there be a collision between two
mimetypes neither of which have an x-? Is there some other heuristic we can
use?
[0]
http://cgit.freedesktop.org/xdg/shared-mime-info/commit/freedesktop.org.xml.in?id=afbdfb40a3ff8c255e5d3dab8840cc478a007d45
Thanks,
Thomas
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