Contao\FrontendTemplate::setCacheHeaders PHP Метод

    private function setCacheHeaders(Response $response)
    {
        /** @var $objPage \PageModel */
        global $objPage;
        if ($objPage->cache === false && $objPage->clientCache === false) {
            return $response->setPrivate();
        }
        // Do not cache the response if a user is logged in or the page is protected or uses a mobile layout
        // TODO: Add support for proxies so they can vary on member context and page layout
        if (FE_USER_LOGGED_IN === true || BE_USER_LOGGED_IN === true || $objPage->isMobile || $objPage->protected || $this->hasAuthenticatedBackendUser()) {
            return $response->setPrivate();
        }
        if ($objPage->clientCache > 0) {
            $response->setMaxAge($objPage->clientCache);
        }
        if ($objPage->cache > 0) {
            $response->setSharedMaxAge($objPage->cache);
        }
        return $response;
    }