Update: working AnyEvent version.

#!/usr/bin/env perl
use strict;
use warnings;
use Data::Dumper;
use POSIX;
use EV();
use AnyEvent();
use AnyEvent::Handle();
use IO::Socket::INET();
use Socket qw(SOCK_STREAM);

my $server_socket = IO::Socket::INET->new(
    Listen    => 5,
    ReuseAddr => 1,
    LocalPort => 8888,
    Blocking  => 0,
    Type      => SOCK_STREAM,
);
$server_socket->autoflush( 1 );

my $child = AnyEvent->condvar;
my $server_socket_watcher = AnyEvent->io(
    fh   => $server_socket,
    poll => 'r',
    cb   => sub {
        my $client_socket = $server_socket->accept;

        my $client = AnyEvent->condvar;
        my $handle = AnyEvent::Handle->new(
            fh       => $client_socket,
            on_read  => sub {
                my( $self ) = @_;
warn $$, ' GOT: ', $self->rbuf;
                if( $self->rbuf =~ /QUIT/ ) {
warn $$, ' QUITTING';
                    $client->send;
                }
            },
            on_drain => sub { warn $$, ' drain '; },
            on_error => sub { print "Client connection error\n"; $clie
+nt->broadcast; },
        );
        $client->recv;
warn $$, ' CLIENT: recv';
    },
);
 warn $$, ' $child->recv';
$child->recv;
 warn $$, ' CHILD: done';
exit;
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