use HTML::LinkExtor;
use LWP::Simple qw(get head);

$base_url = shift or die "not working here: $0 <start_url>\n";
$parser = HTML::LinkExtor->new(undef, $base_url);
$parser->parse(get($base_url));
@links = $parser->links;
print "$base_url: \n";
foreach $linkarray(@links)
{
my @element = @$linkarray;
my $elt_type = shift @element;
while (@element)
{
my ($attr_name, $attr_value) = splice(@element, 0,2);
if ($attr_value->scheme =~ /\b(ftp|https?|file)\b/)
{
print " $attr_value ", head($attr_value) ? "OK" : "BAD","\n";
}
}
}