twistor / flysystem-guzzle

     * @return string

     */

    protected function getMimetypeFromResponse($path, ResponseInterface $response) {

        if ($response->hasHeader('Content-Type')) {

            $mimetype = reset($response->getHeader('Content-Type'));

            list($mimetype) = explode(';', $mimetype, 2);

            return trim($mimetype);

        }

        // Try to guess from file extension.

        $uri = new Uri($path);

            }

        }

        if ($response->hasHeader('Content-Length')) {

            $length = reset($response->getHeader('Content-Length'));

            if (is_numeric($length)) {

                $metadata['size'] = (int) $length;

            }

        }

        return $metadata;

    }