CCrmProductFile::GetPublicLink

function GetPublicLink($params = array())
{
	$result = $this->GetImgSrc($params);

	if (is_array($params['url_params']))
	{
		$result = CHTTP::urlAddParams($result, $params['url_params']);
	}

	if(!preg_match("/^[a-z]+:\\/\\//", $result))
	{
		$context = Bitrix\Main\Application::getInstance()->getContext();
		$scheme = $context->getRequest()->isHttps() ? 'https' : 'http';
		$server = $context->getServer();
		$domain = $server->getServerName() ?: \COption::getOptionString('main', 'server_name', '');
		if (preg_match('/^(?.+):(?\d+)$/', $domain, $matches))
		{
			$domain = $matches['domain'];
			$port   = $matches['port'];
		}
		else
		{
			$port = $server->getServerPort();
		}
		$port = in_array($port, array(80, 443)) ? '' : ':'.$port;

		$result = $scheme.'://'.$domain.$port.$result;
	}

	return $result;
}