Symfony\Bridge\PsrHttpMessage\Factory\DiactorosFactory::createRequest PHP Method

    public function createRequest(Request $symfonyRequest)
    {
        $server = DiactorosRequestFactory::normalizeServer($symfonyRequest->server->all());
        $headers = $symfonyRequest->headers->all();
        if (PHP_VERSION_ID < 50600) {
            $body = new DiactorosStream('php://temp', 'wb+');
            $body->write($symfonyRequest->getContent());
        } else {
            $body = new DiactorosStream($symfonyRequest->getContent(true));
        }
        $request = new ServerRequest($server, DiactorosRequestFactory::normalizeFiles($this->getFiles($symfonyRequest->files->all())), $symfonyRequest->getUri(), $symfonyRequest->getMethod(), $body, $headers);
        $request = $request->withCookieParams($symfonyRequest->cookies->all())->withQueryParams($symfonyRequest->query->all())->withParsedBody($symfonyRequest->request->all());
        foreach ($symfonyRequest->attributes->all() as $key => $value) {
            $request = $request->withAttribute($key, $value);
        }
        return $request;
    }

 /**
  * action for routing all requests directly to the third party API
  *
  * @param Request $request request
  *
  * @return \Psr\Http\Message\ResponseInterface|Response
  */
 public function proxyAction(Request $request)
 {
     $api = $this->decideApiAndEndpoint($request->getUri());
     $this->registerProxySources();
     $url = $this->apiLoader->getEndpoint($api['endpoint'], true);
     if (parse_url($url, PHP_URL_SCHEME) === false) {
         $scheme = $request->getScheme();
         $url = $scheme . '://' . $url;
     }
     $response = null;
     try {
         $newRequest = Request::create($url, $request->getMethod(), array(), array(), array(), array(), $request->getContent(false));
         $newRequest->headers->add($request->headers->all());
         $newRequest = $this->transformationHandler->transformRequest($api['apiName'], $api['endpoint'], $request, $newRequest);
         $psrRequest = $this->diactorosFactory->createRequest($newRequest);
         $psrRequest = $psrRequest->withUri($psrRequest->getUri()->withPort(parse_url($url, PHP_URL_PORT)));
         $psrResponse = $this->proxy->forward($psrRequest)->to($this->getHostWithScheme($url));
         $response = $this->httpFoundationFactory->createResponse($psrResponse);
         $this->transformationHandler->transformResponse($api['apiName'], $api['endpoint'], $response, clone $response);
     } catch (ClientException $e) {
         $response = $e->getResponse();
     } catch (ServerException $serverException) {
         $response = $serverException->getResponse();
     }
     return $response;
 }