class DRb::DRbTCPSocket

def self.parse_uri(uri)
  if /\Adruby:\/\/(.*?):(\d+)(\?(.*))?\z/ =~ uri
    host = $1
    port = $2.to_i
    option = $4
    [host, port, option]
  else
    raise(DRbBadScheme, uri) unless uri.start_with?('druby:')
    raise(DRbBadURI, 'can\'t parse uri:' + uri)
  end
end