Conflicting mime types

[Jerome Leclanche]

Are they valid PNGs? If so, it sounds like the mime type should just be a
child of image/png and drop the glob here.

J. Leclanche


On Tue, Mar 5, 2013 at 11:29 AM, Thomas Kluyver <thomas at kluyver.me.uk>wrote:

> 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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