sub filter::can_connect_to {
    my ($self,$input) = @_;
    return 1;
  };

  sub filter::connect_output {
    my ($self,$next_filter) = @_;
    # ... do magic
  };

  sub filter::on_input_connect {
    my ($self,$input) = @_;
  };

  sub filter::process {
    my ($self, $data) = @_;
    # ... do magic
  };

  sub filter::describe {
    return "Magic filter";  
  };

##</code><code>##

perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ;    # The  
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new   #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' #  web