use LWP::UserAgent qw( );

my $response = LWP::UserAgent->new()->get('http://www.w3.org/html');
for (;;) {
   my $uri    = $response->request()->uri();
   my $status = $response->status_line();
   print("$uri => $status\n");

   $response = $response->previous();
   last if !defined($response);

   print("as a result of\n");
}