you could use CGI to get the form and url inputs!
I have found it to work very well and it has many other functions for web scripts.

# Load CGI.pm
use CGI qw(:standard);
$CGI::POST_MAX        = 1024 * 100;
$CGI::DISABLE_UPLOADS = 1;
$CGI::HEADERS_ONCE    = 1;
my $query = new CGI;

# Get inputs
my $id = $query->param('id') || '';
my $handle = $query->param('handle') || '';
[download]

it also redirects.
print $query->redirect(-location=>"http://www.yourdomain.com/open.cgi");

CGI.pm does a lot more for web scripts like Cookies and HTML, est... If you have not used it try it out its a Default Perl Module.