Build Status: master Gem Version MIT license

:nut_and_bolt: Utility to parse and sort the "Accept-Language" HTTP Header


Add this line to your application's Gemfile:

gem 'http_headers-accept_language'

And then execute:

$ bundle

Or install it yourself as:

$ gem install http_headers-accept_language


You can parse the "Accept-Language" header. As per the RFCs, you should really have one (delimited) value but the current implementation accepts an array of values.

require 'http_headers/accept_language'

parsed ='nl-NL, nl, en-US; q=0.4, en; q=0.1')
# => 'NL' 
# => 0.1

parsed =[
  'eo; q=0.1', 
  'es-ES; foo=bar, es-MX; q=0.9'
# => bar
# => 'eo; q=0.1'
# => 'es-MX' 

Each parsed entry has the following methods:

  • locale: the parsed locale
  • language: the language part of the locale
  • region: the region part of the locale
  • q: the quality parameter as float, or 1.0
  • [](parameter): accessor for the parameter; throws if it does not exist
  • to_s: encode back to an entry to be used in a Accept-Language header


After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at XPBytes/http_headers-accept.