Bolt\EventListener\ConfigListener::onRequest PHP Метод

    public function onRequest(GetResponseEvent $event)
    {
        if (Zone::isBackend($event->getRequest())) {
            $this->setVersionChangeNotice();
        }
        // Twig globals
        $this->setGlobals(false);
        // Only cache if the config passes checks
        if ($this->app['config']->checkConfig() === false) {
            return null;
        }
        // Final thing we do, if we're still standing, is to save our
        // configuration to cache
        if (!$this->app['config']->get('general/caching/config')) {
            return null;
        }
        try {
            $this->app['config']->cacheConfig();
        } catch (IOException $e) {
            $response = $this->app['controller.exception']->genericException($e);
            $event->setResponse($response);
        }
        return null;
    }