#!env perl
{
    package sillyServer;
    use HTTP::Server::Simple::CGI;
    use base qw(HTTP::Server::Simple::CGI);
    use Data::Dump 'pp';

    # URL paths to monitor
    my %dispatch = (
        '/hello' => \&resp_hello,
    );

    # Look up the path and execute the associated routine, or
    # give a typical 404 error
    sub handle_request {
        my ($self, $cgi) = @_;
        my $path = $cgi->path_info();
        my $handler = $dispatch{$path};
        if ("CODE" eq ref $handler) {
            print "HTTP/1.0 200 OK\r\n";
            $handler->($cgi);
            return;
        }

        print "HTTP/1.0 404 Not found\r\n",
            $cgi->header,
            $cgi->start_html("Nada Darn Thing To C Here"),
            $cgi->h1("Nuttin here"),
            $cgi->end_html;
    }

    # handler for "/hello"
    sub resp_hello {
        my $cgi = shift;
        return if !ref $cgi;
        print $cgi->header,
                $cgi->start_html("Hello"),
                $cgi->h1("Hi there!\n"),
                $cgi->p("Parameters from \$cgi: ", pp($cgi->{param})),
                $cgi->p("Parameters from ENV: $ENV{QUERY_STRING}"),
                $cgi->end_html;
    }
}

# Start up the server
use strict;
use warnings;
my $pid = sillyServer->new(8088)->run;
print "PID = $pid, press ^C to stop\n";
my $t = <>;
[download]

Just enter "127.0.0.1/hello?Foo=bar" into your browser's address bar, and get a simple page that displays the parameters from the $cgi->{params} variable as well as from the %ENV variable.