Accept Language

A tiny library for parsing the Accept-Language header from browsers (as defined in RFC 2616).

Status

Installation

Add this line to your application's Gemfile:

gem 'accept_language'

And then execute:

$ bundle

Or install it yourself as:

$ gem install accept_language

Usage

It's intended to be used in a Web server that supports some level of internationalization (i18n), but can be used anytime an Accept-Language header string is available.

Examples

AcceptLanguage.parse('da, en-gb;q=0.8, en;q=0.7') # => [:da, :"en-gb", :en]
AcceptLanguage.parse('fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5') # => [:"fr-CH", :fr, :en, :de, :*]

In order to help facilitate better i18n, a method is provided to return the intersection of the languages the user prefers and the languages your application supports.

Examples

AcceptLanguage.intersection('da, en-gb;q=0.8, en;q=0.7', :ar, :da, :ja, :ro) # => :da
AcceptLanguage.intersection('da, en-gb;q=0.8, en;q=0.7', :ar, :ja, :ro) # => nil
AcceptLanguage.intersection('fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5', :en, :ja) # => :en
AcceptLanguage.intersection('fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5', :ja) # => :ja
AcceptLanguage.intersection('ko, fr-CH;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5', :fr, :de) # => :fr
AcceptLanguage.intersection('ko, fr-CH;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5', :fr, :de, truncate: false) # => :de
AcceptLanguage.intersection('*;q=0.5, zh;q=0.4', :ja, :zh) # => :ja
AcceptLanguage.intersection('fr;q=0, zh;q=0.4', :fr) # => nil

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/cyril/accept_language.rb. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

Versioning

AcceptLanguage uses Semantic Versioning 2.0.0

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the AcceptLanguage project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.