App/RequestHandler.php
private function applyResponseEncoding(
        Request $request,
        Response $response
    )
    {
        $allowedCompressionAsString = $request
            ->headers
            ->get('Accept-Encoding');

        if (!$allowedCompressionAsString) {
            return;
        }

        $allowedCompression = explode(',', $allowedCompressionAsString);
        $allowedCompression = array_map('trim', $allowedCompression);

        if (in_array('gzip', $allowedCompression)) {
            $response->setContent(gzencode($response->getContent()));
            $response
                ->headers
                ->set('Content-Encoding', 'gzip');

            return;
        }

        if (in_array('deflate', $allowedCompression)) {
            $response->setContent(gzdeflate($response->getContent()));
            $response
                ->headers
                ->set('Content-Encoding', 'deflate');

            return;
        }
    }
private function applyResponseEncoding(
        Request $request,
        Response $response
    )
    {
        $allowedCompressionAsString = $request
            ->headers
            ->get('Accept-Encoding');

        if (!$allowedCompressionAsString) {
            return;
        }

        $allowedCompression = explode(',', $allowedCompressionAsString);
        $allowedCompression = array_map('trim', $allowedCompression);

        if (in_array('gzip', $allowedCompression)) {
            $response->setContent(gzencode($response->getContent()));
            $response
                ->headers
                ->set('Content-Encoding', 'gzip');

            return;
        }

        if (in_array('deflate', $allowedCompression)) {
            $response->setContent(gzdeflate($response->getContent()));
            $response
                ->headers
                ->set('Content-Encoding', 'deflate');

            return;
        }
    }
Apply response encoding

@param Request $request
@param Response $response