Rails — Parse cookies from request header

header_cookies.rb

module HeaderCookies
  def header_cookies(req=nil)
    req ||= request
    cookie_dough = request.headers['Cookie'].split '; '
    Hash[cookie_dough.map do |c| 
      pieces = c.split '='
      [pieces[0].to_sym, pieces[1]]
    end]
  end
end