Woothee ruby

The Ruby implementation of Project Woothee, which is multi-language user-agent strings parsers.



Add this line to your application's Gemfile:

gem 'woothee'

And then execute:

$ bundle

Or install it yourself as:

$ gem install woothee


Class 'Woothee' have no instance methods.

Parsing user-agent

require 'woothee'
Woothee.parse("Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)")
 # => {:name=>"Internet Explorer", :category=>:pc, :os=>"Windows 7", :version=>"8.0", :vendor=>"Microsoft", :os_version=>"NT 6.1"}

Parse user-agent string and returns Hash instance with keys :name, :category, :os, :version and :vendor.

For unknown user-agent (or partially failed to parse), result Hash instance may have value 'UNKNOWN'.

  • :category
    • labels of user terminal type, one of 'pc', 'smartphone', 'mobilephone', 'appliance', 'crawler' or 'misc' (or 'UNKNOWN')
  • :name
    • the name of browser, like 'Internet Explorer', 'Firefox', 'GoogleBot'
  • :version
    • version string, like '8.0' for IE, '9.0.1' for Firefix, '' for Chrome, and so on
  • :os
    • ex: 'Windows 7', 'Mac OSX', 'iPhone', 'iPad', 'Android'
    • This field used to indicate cellar phone carrier for category 'mobilephone'
  • :vendor
    • optional field, shows browser vendor
  • :os_version
    • optional field, shows version of operating systems

Finding crawlers (almost all, not all) in fast

require 'woothee'
Woothee.is_crawler("Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)")
 # => false

Try to see useragent's category is 'crawler' or not, by casual(fast) method. Minor case of crawlers is not tested in this method. To check crawler strictly, use Woothee.parse(str)[:category] == :crawler.



Copyright 2012- TAGOMORI Satoshi (tagomoris)

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.