CForumRestService::getPublicDomain

static function getPublicDomain()
{
	static $result = null;
	if ($result === null)
	{
		$result = (BitrixMainContext::getCurrent()->getRequest()->isHttps() ? "https" : "http")."://".((defined("SITE_SERVER_NAME") && SITE_SERVER_NAME <> '') ? SITE_SERVER_NAME : BitrixMainConfigOption::get("main", "server_name", $_SERVER['SERVER_NAME']));
	}

	return $result;
}