class Addressable::URI

def port=(new_port)
  if new_port != nil && new_port.respond_to?(:to_str)
    new_port = Addressable::URI.unencode_component(new_port.to_str)
  end
  if new_port.respond_to?(:valid_encoding?) && !new_port.valid_encoding?
    raise InvalidURIError, "Invalid encoding in port"
  end
  if new_port != nil && !(new_port.to_s =~ /^\d+$/)
    raise InvalidURIError,
      "Invalid port number: #{new_port.inspect}"
  end
  @port = new_port.to_s.to_i
  @port = nil if @port == 0
  # Reset dependent values
  remove_instance_variable(:@authority) if defined?(@authority)
  remove_instance_variable(:@normalized_port) if defined?(@normalized_port)
  remove_composite_values
  # Ensure we haven't created an invalid URI
  validate()
end