Conflicting mime types

[Bastien Nocera]

On Tue, 2013-03-05 at 11:58 +0000, Jerome Leclanche wrote:
> Are they valid PNGs?

They're not.

>  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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> 
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