use strict;
use warnings;

use LWP::Simple;

# Pre-load essential modules for extra stability.

if ( $INC{'LWP/UserAgent.pm'} && !$INC{'Net/HTTP.pm'} ) {
   require IO::Handle;
   require Net::HTTP;
   require Net::HTTPS;
}

my @urls = (
   'http://hooboy.no-such-host.int/',
   'http://us.a1.yimg.com/us.yimg.com/i/ww/m5v9.gif',
   'http://www.guardian.co.uk/',
   'http://www.ora.com/ask_tim/graphics/asktim_header_main.gif',
   'http://www.pixunlimited.co.uk/siteheaders/Guardian.gif',
   'http://www.yahoo.com',
) x 4;

use MCE::Hobo 1.831;

MCE::Hobo->init(
   max_workers => 8,
   posix_exit  => 1,
);

foreach my $url ( @urls ) {
   mce_async {
      my ($type, $length, $mod) = head($url);
      print "$url is done\n";
   };
}

MCE::Hobo->waitall;