How do I cache and reuse a copy of GuzzleHttp\Psr7\Response for debugging purposes?

Question

I'm processing a large API response that comes as GuzzleHttp\Psr7\Response. While debugging and profiling my script, I'd like to eliminate the varying network and API server response times.

My idea was to simply save a copy of the JSON that the server responds with into a text file, and keep reading it from the local filesystem until I'm done. Since I can't neither inject the JSON into the curl handler, nor serialize() it, I'd have to save the whole GuzzleHttp\Psr7\Response. But it contains some streams, which it later tries to read and fails.

I have tried serializing and immediately unserializing just to see if it works (it doesn't):

• src/Handler/CurlFactory.php:106

  if (!$easy->response || $easy->errno) {
      return self::finishError($handler, $easy, $factory);
  }
  $temporaryCopy = serialize($easy->response);
  $easy->response = unserialize($temporaryCopy);
  

• src/Handler/CurlHandler.php:40

  curl_exec($easy->handle);
  $temporaryCopy = serialize($easy->handle);
  $easy->handle = unserialize($temporaryCopy);
  

The above doesn't work. Before I continue fighting the framework, is there an out-of-the box way to get it done?