Auxiliary for explore session injection

More about http://joridos.com/hacking/metasploit/rails/ruby/2014/09/03/session-injection-Challenge-criando-modulo-metasploit/

this auxiliary require mechanize gem
This seems a little brittle.  First, can agent.get ever return nil?  Regardless, how does this handle cases where the requested URI results in a non-200 status?