Hallöchen!

I'd like to ensure that people only upload PDF files, so the file
must start with "%PDF".  If the file starts with something else, the
form must not validate.

How do I do that?  I though about a clean_... method which reads the
start of the file and then re-opens it.  Is this a good idea?

Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bron...@jabber.rwth-aachen.de


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