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

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

Installation

Install the gem http_accept_language, require it in your Rails app.

Changelog

2010-01-05: Gem release
2009-03-12: Rails 2.3 compatible