Here's crazyinsomniac's version with a few extras that it took me way to long to figure out it needed to work for me (I still have to view source to see the output, but at least I don't get an internal service error), and two extra new-lines to clarify error messages.

Also, I think one of the addresses in the script used to return a bad header, but someone apparently fixed it, so I changed an address to a nonexistant one so I could see the error handler at work.

#!/usr/bin/perl -w
######################################################################
+########
print "Cache-Control: no-cache, must-revalidate\n";
print "Pragma: no-cache\n";

print "Content-type: text/html\n\n";


$^W = 552 >> 3;

use strict;          # for sanity (ALWAYS!!!)
use LWP::UserAgent;
use HTTP::Request;
use HTTP::Response;

HEAD('http://12box.co.uk/');
HEAD('http://japhy.perlmonk.org/book/');

real_HEAD('http://123box.co.uk/');
real_HEAD('http://japhy.perlmonk.org/book/');

sub HEAD {
    my $req = HTTP::Request->new(GET => shift);
    my $UA = new LWP::UserAgent;

    my $res = $UA->request($req, sub { die }, 1);
    
    if($res->is_success) {
        print $res->as_string();
    } else {
        print "\nError: " . $res->status_line . "\n\n";
    }
}

sub real_HEAD {
    my $req = HTTP::Request->new(HEAD => shift);
    my $UA = new LWP::UserAgent;

    my $res = $UA->request($req);
    
    if($res->is_success) {
        print $res->as_string();
    } else {
        print "Error: " . $res->status_line . "\n\n";
    }
}
__END__
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