>> require 'mechanize' => true >> agent = Mechanize.new => #<Mechanize:0xb749417c ... >> agent.pluggable_parser.register_parser("image/png", Mechanize::FileSaver) => Mechanize::FileSaver >> agent.get('http://www.google.co.jp/intl/en_com/images/srpr/logo1w.png') => #</mechanize:0xb749417c>