>
> > I don't know if you are parsing mail or something else,
>
> Isolated file.
>
> > If you are trying to figure it out magically based on just
> the file format
> or filename or
> > something (e.g. just pointing it at a raw jpeg) I didn't
> think MIME::
> would help.
>
> Unfortunately I have to rely on the standard install of ActivePerl and
> didn't want to make assumptions based on the extension type
> of the file.
> Never mind, I will have to investigate further for future
> use. Thanks for
> the help.
Open up the file, read in the first few bytes and grab the magic number.
Most types of binary file have a marker of some kind to designate what they
are. Any half decent book on graphics programming should be able to tell you
what the magic numbers are for the main graphics types.
You can also use this technique to scan hdd's for for files where the file
extension has been changed to 'hide it'.
I had to look up the numbers a while ago for some software that performed
said scan. It's possible I've still got them somewhere... if I have, I'll
let you know (or point you in the right direction).
Rob
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