class Addressable::URI

def normalized_host
  self.host && @normalized_host ||= (begin
    if self.host != nil
      if !self.host.strip.empty?
        result = ::Addressable::IDNA.to_ascii(
          URI.unencode_component(self.host.strip.downcase)
        )
        if result[-1..-1] == "."
          # Trailing dots are unnecessary
          result = result[0...-1]
        end
        result
      else
        EMPTYSTR
      end
    else
      nil
    end
  end)
end