From: Ilmari Heikkinen <kig@...>
Date: 2005-06-02T05:56:26+09:00
Subject: Re: Document identification

ke, 2005-06-01 kello 23:33, Austin Ziegler kirjoitti:
> On 6/1/05, Ilmari Heikkinen <kig@misfiring.net> wrote:
> > ke, 2005-06-01 kello 19:00, M. Eteum kirjoitti:
> > > Dear Ruby Guru:
> > >       Is there a way to identify any documents from its header? I have a
> > > bunch of document collected over the year from multi platform system,
> > > Mac, Windows, and various unix/linux variant where some of the document
> > > does not have file extension. Are there a list that tells us what header
> > > should we expect for certain documents e.g. txt, rtf, pdf, jpg, mpg,
> > > word, excel, visio, etc ...
> > >
> > > Thanks
> 
> Most of this is covered by MIME::Types on RubyForge. However, the OP
> indicated that the problem was related to NOT having proper filename
> extensions. The OP wants to look for magic numbers and strings.
> 

Shared-mime-info does this aswell. Though it may fare worse than file in
some cases.

kig@bauhaus:~$ mv fire.avi fire
kig@bauhaus:~$ irb
irb(main):001:0> require 'mime_info'
=> true
irb(main):002:0> MimeInfo.get('fire')
=> Mimetype['video/x-msvideo']