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User Agent

User agent parser.


agent ='Mozilla/5.0 (Windows; U; Windows NT 6.0; en-us) AppleWebKit/531.9 (KHTML, like Gecko) Version/4.0.3 Safari/531.9')            # => :safari
agent.version         # => '4.0.3'
agent.engine          # => :webkit
agent.engine_version  # => '531.9'
agent.platform        # => :windows
agent.os              # => 'Windows Vista'

Supported Agents

  • Safari

  • Chrome

  • Firefox

  • Opera

  • IE

  • Konqueror

  • PS3

  • PSP

  • Wii


$ gem install user_agent

Note on Patches/Pull Requests

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don't break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.


See LICENSE for details.


Originally written by TJ Holowaychuk, but I (John Nunemaker) will be maintaining this fork of it for the forseeable future.

Verified Ruby Versions

  • REE 1.8.7

  • MRI 1.9.2

Should work on all, but these are the ones I will for sure be checking against.