Simple Perl CGI and LWP

#!/usr/bin/perl

use CGI;

my $q = CGI->new;
print $q->header();

my $url = $q->param('url');

###

require LWP::UserAgent;

my $ua = LWP::UserAgent->new;
$ua->timeout(10);
$ua->proxy('http', 'http://your_proxy_here:80');

my $response = $ua->get($url);

if ($response->is_success) {
print $response->content; # or do fancy stuff here
}
else {
die $response->status_line;
}