UserAgentParser

UserAgentParser is a simple, comprehensive Ruby gem for parsing user agent strings. It uses BrowserScope's parsing patterns.

Requirements

• Ruby >= 1.8.7

Installation

$ gem install user_agent_parser

Example usage

require 'user_agent_parser'
=> true
user_agent = UserAgentParser.parse 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0;)'
=> #<UserAgentParser::UserAgent IE 9.0 (Windows Vista)>
user_agent.to_s
=> "IE 9.0"
user_agent.name
=> "IE"
user_agent.version.to_s
=> "9.0"
user_agent.version.major
=> "9"
user_agent.version.minor
=> "0"
operating_system = user_agent.os
=> #<UserAgentParser::OperatingSystem Windows Vista>
operating_system.to_s
=> "Windows Vista"

# The parser database will be loaded and parsed on every call to
# UserAgentParser.parse. To avoid this, instantiate your own Parser instance.
parser = UserAgentParser::Parser.new
parser.parse 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0;)'
=> #<UserAgentParser::UserAgent IE 9.0 (Windows Vista)>
parser.parse 'Opera/9.80 (Windows NT 5.1; U; ru) Presto/2.5.24 Version/10.53'
=> #<UserAgentParser::UserAgent Opera 10.53 (Windows XP)>

In a larger application, you could store a parser in a global to avoid repeat pattern loading:

module MyApplication

  # Instantiate the parser on load as it's quite expensive
  USER_AGENT_PARSER = UserAgentParser::Parser.new

  def self.user_agent_parser
    USER_AGENT_PARSER
  end

end

The pattern database

The ua-parser database is included via a git submodule. To update the database the submodule needs to be updated and the gem re-released (pull requests for this are very welcome!).

You can also specify the path to your own, updated and/or customised regexes.yaml file as a second argument to UserAgentParser.parse:

UserAgentParser.parse(ua_string, patterns_path: '/some/path/to/regexes.yaml')

or when instantiating a UserAgentParser::Parser:

UserAgentParser::Parser.new(patterns_path: '/some/path/to/regexes.yaml').parse(ua_string)

Contributing

1. Fork
2. Hack
3. rake test
4. Send a pull request

All accepted pull requests will earn you commit and release rights.

Releasing a new version

1. Update the version in user_agent_parser.gemspec

2. git commit user_agent_parser.gemspec with the following message format:

    Version x.x.x
   
    Changelog:
    * Some new feature
    * Some new bug fix
   

3. rake release

License

MIT