use CGI qw/:cgi/;
use Data::Dumper;
use CGI::Session;
my $query = new CGI;

my $session = new CGI::Session("driver:File", $query, {Directory=>'/tmp'});

$session->param('user_id',$query->param('user_id'));
$session->param('user_name',$query->param('user_name'));
$session->param('logged-in',1);
$session->expires("+15m");

my $cookie = $query->cookie(CGISESSID => $session->id );
print $query->header(-cookie => $cookie);