UserAgent

UserAgent is a Ruby library that parses and compares HTTP User Agents.

Installation

gem install useragent

Examples

Reporting

string = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.56 Safari/536.5'
user_agent = UserAgent.parse(string)
user_agent.browser
# => 'Chrome'
user_agent.version
# => '19.0.1084.56'
user_agent.platform
# => 'Macintosh'

Comparison

Browser = Struct.new(:browser, :version)

SupportedBrowsers = [
  Browser.new("Safari", "3.1.1"),
  Browser.new("Firefox", "2.0.0.14"),
  Browser.new("Internet Explorer", "7.0")
]

user_agent = UserAgent.parse(request.user_agent)
SupportedBrowsers.detect { |browser| user_agent >= browser }

Building and Publishing @ ART19

This gem is deployed to GitHub packages. Follow the GitHub Packages Guide to set up your system for this. You will end up creating a key in ~/.gem/credentials, probably named github. Once you've done that, you can GEM_PUSH_KEY=whatever bundle exec rake publish to publish the gem. Please note that once you "use" a version number on GitHub, it's used forever, so be sure to edit the version number in the app to add .pre.GIT_SHORT_HASH to the end if this is a test build (you can use git rev-parse --short --verify HEAD to get the Git short hash).

Copyright (c) 2015-2019 Garry Shutler, released under the MIT license Copyright (c) 2020 ART19 Inc., released under the MIT license