mount '/echo' => SockJS->new(
        handler => sub {
            warn "Creating new session";
            my ($session) = @_;

            $session->on(
                'data' => sub {
                    my $session = shift;
                    warn "got new data";

                    $session->write('got your message');
                    warn "Wrote response";
                }
            );

            $session->write('connected');
            warn "Wrote greeting";

            my $w_cond = AnyEvent->condvar;
            my $w; $w = AnyEvent->timer(
                after => 0,
                interval => 5,
                cb => sub {
                    undef $w; # cleanup
                    $session->write('5 seconds have passed');
                    warn "Wrote timer message";
                    $w_cond->send();
                }
            );
            $w_cond->recv;
            warn "Leaving";
        };
    );