$read_select->add($web_socket) if length($output_buffer) <= $max_buffer_len;
} elsif ($fh == $web_socket) {
$drain_buffer->($web_socket, \$websock_buffer);
$read_select->add($web_socket) if length($output_buffer) <= $max_buffer_len;
} elsif ($fh == $web_socket) {
$drain_buffer->($web_socket, \$websock_buffer);