UrlPreview::saveImage

static function saveImage($url)
{
	$fileId = false;
	$httpClient = new HttpClient();
	$httpClient->setTimeout(5);
	$httpClient->setStreamTimeout(5);

	$urlComponents = parse_url($url);
	$fileName = ($urlComponents && $urlComponents["path"] <> '')
		? bx_basename($urlComponents["path"])
		: bx_basename($url)
	;

	$tempFileName = Random::getString(32) . '.' . GetFileExtension($fileName);
	$tempPath = CFile::GetTempName('', $tempFileName);

	try
	{
		$httpClient->download($url, $tempPath);
	}
	catch (ErrorException $exception)
	{
		return null;
	}
	$fileName = $httpClient->getHeaders()->getFilename();
	$localFile = CFile::MakeFileArray($tempPath);
	$localFile['MODULE_ID'] = 'main';

	if (is_array($localFile))
	{
		if ($fileName <> '')
		{
			$localFile['name'] = $fileName;
		}
		if (CFile::CheckImageFile($localFile, 0, 0, 0, array("IMAGE")) === null)
		{
			$fileId = CFile::SaveFile($localFile, 'urlpreview', true);
		}
	}

	return ($fileId === false ? null : $fileId);
}