public function initialize(DAV\Server $server)
    {
        $this->server = $server;
        $this->server->on('method:GET', [$this, 'httpGet'], 90);
        $server->on('browserButtonActions', function ($path, $node, &$actions) {
            if ($node instanceof IAddressBook) {
                $actions .= '<a href="'.htmlspecialchars($path, ENT_QUOTES, 'UTF-8').'?export"><span class="oi" data-glyph="book"></span></a>';
            }
        });
    }