private function parseResult(string $result): PageFetcherResponseInterface
    {
        $resultParts = explode("\r\n\r\n", $result, 2);

        $headers = explode("\r\n", $resultParts[0]);
        $statusLine = array_shift($headers);
        $statusLineParts = explode(' ', $statusLine);
        $httpCode = intval($statusLineParts[1]);
        if ($httpCode === 100) {
            return $this->parseResult($resultParts[1]);
        }

        $content = count($resultParts) > 1 ? $resultParts[1] : '';

        $response = new PageFetcherResponse($httpCode, $content);
        foreach ($headers as $header) {
            $response->addHeader(trim($header));
        }

        return $response;
    }