Symfony\Component\HttpFoundation\Request::getContent PHP Method

    public function getContent($asResource = false)
    {
        $currentContentIsResource = is_resource($this->content);
        if (PHP_VERSION_ID < 50600 && false === $this->content) {
            throw new \LogicException('getContent() can only be called once when using the resource return type and PHP below 5.6.');
        }

        if (true === $asResource) {
            if ($currentContentIsResource) {
                rewind($this->content);

                return $this->content;
            }

            // Content passed in parameter (test)
            if (is_string($this->content)) {
                $resource = fopen('php://temp', 'r+');
                fwrite($resource, $this->content);
                rewind($resource);

                return $resource;
            }

            $this->content = false;

            return fopen('php://input', 'rb');
        }

        if ($currentContentIsResource) {
            rewind($this->content);

            return stream_get_contents($this->content);
        }

        if (null === $this->content || false === $this->content) {
            $this->content = file_get_contents('php://input');
        }

        return $this->content;
    }

 public function postAction(Request $request)
 {
     $repo = $this->get('tekstove.user.repository');
     /* @var $repo \Tekstove\ApiBundle\Model\User\UserRepository */
     $recaptchaSecret = $this->container->getParameter('tekstove_api.recaptcha.secret');
     $requestData = \json_decode($request->getContent(), true);
     $userData = $requestData['user'];
     $recaptchaData = $requestData['recaptcha'];
     $user = new User();
     try {
         $recaptcha = new \ReCaptcha\ReCaptcha($recaptchaSecret);
         $recaptchaResponse = $recaptcha->verify($recaptchaData['g-recaptcha-response']);
         if (!$recaptchaResponse->isSuccess()) {
             $recaptchaException = new UserHumanReadableException("Recaptcha validation failed");
             $recaptchaException->addError("recaptcha", "Validation failed");
             throw $recaptchaException;
         }
         $user->setUsername($userData['username']);
         $user->setMail($userData['mail']);
         $user->setPassword($this->hashPassword($userData['password']));
         $user->setapiKey(sha1(str_shuffle(uniqid())));
         $repo->save($user);
     } catch (UserHumanReadableException $e) {
         $view = $this->handleData($request, $e->getErrors());
         $view->setStatusCode(400);
         return $view;
     }
 }