Neos\Flow\Http\Client\InternalRequestEngine::sendRequest PHP Method

    public function sendRequest(Http\Request $httpRequest)
    {
        $requestHandler = $this->bootstrap->getActiveRequestHandler();
        if (!$requestHandler instanceof FunctionalTestRequestHandler) {
            throw new Http\Exception('The browser\'s internal request engine has only been designed for use within functional tests.', 1335523749);
        }
        $this->securityContext->clearContext();
        $this->validatorResolver->reset();
        $response = new Http\Response();
        $componentContext = new ComponentContext($httpRequest, $response);
        $requestHandler->setComponentContext($componentContext);
        $objectManager = $this->bootstrap->getObjectManager();
        $baseComponentChain = $objectManager->get(\Neos\Flow\Http\Component\ComponentChain::class);
        $componentContext = new ComponentContext($httpRequest, $response);
        try {
            $baseComponentChain->handle($componentContext);
        } catch (\Throwable $throwable) {
            $this->prepareErrorResponse($throwable, $componentContext->getHttpResponse());
        } catch (\Exception $exception) {
            $this->prepareErrorResponse($exception, $componentContext->getHttpResponse());
        }
        $session = $this->bootstrap->getObjectManager()->get(SessionInterface::class);
        if ($session->isStarted()) {
            $session->close();
        }
        $this->persistenceManager->clearState();
        return $componentContext->getHttpResponse();
    }