From: Daniel Berger <djberg96@...>
Date: 2007-07-19T22:06:47+09:00
Subject: Re: Validating an Image file is an image file



On Jul 19, 5:05 am, "Raf Coremans" <rra...@gmail.com> wrote:
> 2007/7/18, Daniel Berger <djber...@gmail.com>:
> <snip>
>
> >    def self.jpg?(file)
> >       IO.read(file, 10) == "\377\330\377\340\000\020JFIF" &&
> > File.extname(file).downcase == '.jpg'
> >    end
>
> Ack! The proper abbreviation, and thus also the filename extension, is
> 'jpeg'. 'jpg' is an abomination introduced by the same people who introduced
> the *shudder* '.htm' filename extension.

Be that as it may, you will see both extensions in practice. So, the
code should probably be refactored to be:

def self.jpeg?(file)
   IO.read(file, 10) == "\377\330\377\340\000\020JFIF" && ['.jpg',
'.jpeg'].include?(File.extname(file).downcase)
end

alias jpg? jpeg?

Regards,

Dan