Hi David. Thanks for the response. Took a detour and just returned to this
task.
I decided to do a quick check on file extension after all. This is in the
admin area and for now this will have to do:
def save_model(self, request, obj, form, change):
try:
file_name = request.FILES['audio_file'].name
if file_name.split('.')[1] == 'mp3':
obj.save()
else:
raise forms.ValidationError("The podcast file must be of
type .mp3")
except:
raise forms.ValidationError("A podcast file is required.")
Just out of curiosity, what does your custom FielField look like?
Many thanks!
On Fri, Mar 25, 2011 at 5:20 PM, David De La Harpe Golden <
david.delaharpe.gol...@ichec.ie> wrote:
> On 25/03/11 13:48, Sithembewena Lloyd Dube wrote:
> > Hi folks,
> >
> > I have a model with a FileField, and I need to chech that the file is
> .mp3
> > before it is uploaded. How would I go about this without the hack of
> getting
> > the file name and slicing it?
> >
>
> Uh. File names are just names. There's no guarantee a file called
> blah.mp3 is an mp3. I assume what you actually want is to try to make
> sure the client only uploads mp3 audio files.
>
> Browsers do typically try to respect the "accept" html attribute [1] in
> a file upload field in a form to limit the options in the file select
> dialog to files of the specified type (at least by default), so could
> say accept="audio/mpeg" (strictly that'll cover mp1 and mp2 too, but meh
> [2]) - but try adding it as an attr on the widget of the field of the
> django form.[3]
>
> However, remember, /you can't trust the client/. So you're going to
> have to let some or all of the upload happen and check or recheck on the
> server, at least if you really care if it's really an mp3 file.
>
> We use a FileField subclass that just call python-magic [4] for a quick
> initial mimetype check (and pyclamd [5] to virus scan), though of course
> it's not infallible either, you may (will) need further file format
> specific validation if you care whether the file is valid and
> uncorrupted (and probably ultimately a human approval process in your
> case, automatically judging if a completely valid .mp3 is just 4 minutes
> of some guy screaming obscenities is difficult...)
>
> [1] http://www.w3.org/TR/html401/interact/forms.html#adef-accept
> [2] http://tools.ietf.org/html/rfc3003
> [3]
>
> http://docs.djangoproject.com/en/dev/ref/forms/widgets/#django.forms.Widget.attrs
> [4] http://packages.debian.org/sid/python-magic
> [5] http://xael.org/norman/python/pyclamd/
>
>
>
>
>
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>
--
Regards,
Sithembewena Lloyd Dube
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