MimeMagic is a library to detect the mime type of a file by extension or by content. It uses the mime database provided by freedesktop.org (see http://freedesktop.org/wiki/Software/shared-mime-info/).
Warning: If you are using a version of MimeMagic < 0.3.7, or version 0.4.0, you may well be in breach of the GPL due to a GPL licensed dependency that was bundled with this gem. You should update to a version >= 0.3.7 as soon as possible. See mimemagicrb#97 for details.
You will require a copy of the Freedesktop.org shared-mime-info database to be available. If you're on Linux, it's probably available via your package manager, and will probably be in the location it's being looked for when the gem is installed.
macOS users can install the database via Homebrew with brew install shared-mime-info.
If for whatever reason you can't do either of those things, you'll need to obtain a copy from the Internet. Set
the environment variable FREEDESKTOP_MIME_TYPES_PATH before installing the gem in order to point the build at
that location.
(TODO: Locate a reliable source for the compiled file, and link to it both here, and in the error message if one isn't found.)
require 'mimemagic'
MimeMagic.by_extension('html').text?
MimeMagic.by_extension('.html').child_of? 'text/plain'
MimeMagic.by_path('filename.txt')
MimeMagic.by_magic(File.open('test.html'))
# etc...You can add your own magic with MimeMagic.add.
http://www.rubydoc.info/github/minad/mimemagic
bundle install
rake test
Daniel Mendler
MIT