Easier access to assets in Rails 3.1

assets.rb

# coding: UTF-8

# A module to facilitate the retrieval of asset paths and urls in Rails 3.1.
module Assets
  extend self

  def url(file)
    host + path(file)
  end

  def path(file)
    Rails.application.assets.path(file, true, prefix)
  end

  def prefix
    Rails.configuration.assets.prefix
  end

  def host
    Rails.configuration.action_controller.asset_host
  end
end