HttpAcceptLanguage

A small effort in making a plugin which helps you detect the users preferred language, as sent by the HTTP header.

Features

• Splits the http-header into languages specified by the user
• Returns empty array if header is illformed.
• Corrects case to xx-XX
• Sorted by priority given, as much as possible.
• Gives you the most important language
• Gives compatible languages

See also: www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

Example

  class SomeController < ApplicationController
    def some_action

      request.user_preferred_languages
      # => [ 'nl-NL', 'nl-BE', 'nl', 'en-US', 'en' ]

      available = %w{en en-US nl-BE}
      request.preferred_language_from(available)
      # => 'nl-BE'

      request.user_preferred_language
      # => [ 'en-GB']
      available = %w{en-US}
      request.compatible_language_from(available)
      # => 'en-US'
    end
  end

Changenotes

2009-03-12: Rails 2.3 compatible

Copyright © 2008 Iain Hecker, released under the MIT license