public function writeResponse(ResponseInterface $response, RequestInterface $request)
{
//set default header-collection in case, exception was thrown while reading the request
if (!$request->getHeaderCollection() instanceof HeaderCollectionInterface) {
$request->setHeaderCollection(new HeaderCollection());
}
foreach ($this->responseHeaderModifier as $modifier) {
$modifier->modify($response->getHeaderCollection(), $request);
}
$this->statusCodeWriter->writeResponseStatusCode($response->getStatusCode());
$this->headerWriter->writeResponseHeader($response->getHeaderCollection());
$content = $response->getContent();
$requestedContentType = $request->getHeaderCollection()->getHeaderValue(HeaderName::ACCEPT, ContentType::APPLICATION_JSON);
$this->contentWriter->writeResponseContent($content, $requestedContentType);
}
