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Re^2: Need a RegExp for Images

by afoken (Parson)
on Jul 12, 2009 at 06:04 UTC ( #779315=note: print w/ replies, xml ) Need Help??


in reply to Re: Need a RegExp for Images
in thread Need a RegExp for Images

But frankly, I'd be content to trust the file name, and so would focus on the first reply above.

This may be a good idea when you can trust the data source, i.e. when you work with your own files. In a network context (CGI, mod_perl, e-mail, ...), relying on meta data (name, MIME type, ...) sent from a foreign computer opens a big security hole. The only safe way to verify a file in that context is to read it and test that it matches the specification. There are several modules on CPAN for that job. For images, Image::Size may be a good strating point.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)


Comment on Re^2: Need a RegExp for Images
Re^3: Need a RegExp for Images
by spx2 (Chaplain) on Jul 12, 2009 at 16:42 UTC
      Thank you, all.

      :)

      BH

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