protected function _convertAndPost($sChatId, $sHTML)
{
$sTempFile = tempnam(sys_get_temp_dir(), 'webpage');
$oOptions = new Options();
$oOptions->setPdfBackend('GD');
$oOptions->setFontDir(realpath(__DIR__ . '/../fonts'));
$oOptions->setIsRemoteEnabled(true);
$dompdf = new DOMPDF($oOptions);
$dompdf->load_html($sHTML, 'UTF-8');
$dompdf->render();
file_put_contents($sTempFile . '.png', $dompdf->output(array('compress' => 0)));
$aRes = $this->sendPhoto($sChatId, $sTempFile . '.png');
unlink($sTempFile . '.png');
return $aRes;
}