InvalidInput when decoding manifest due to HTTP 1.1 call

[sschueller]

• Arduino board: esp32-s3-devkitc-1

• Arduino IDE version (found in Arduino -> About Arduino menu): Platform IO Core 6.1.7

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too):

Returning the json manifest from my web server running a fairly new nginx version I get "InvalidInput" when decoding the json with a length of -1.

This appears to be due to https://arduinojson.org/v6/how-to/use-arduinojson-with-httpclient/#how-to-parse-a-json-document-from-an-http-response

"Unfortunately, by using the underlying Stream, we bypass the code that handles chunked transfer encoding, so we must switch to HTTP version 1.0."

Sniffing the traffic, the response is indeed "HTTP 1.1" and _http.getStream() returns empty while _http.getString() does not.

When I add _http.useHTTP10(true); as mentioned in the arduniojson docs before the _http.GET(), the call is "HTTP 1.0" and the manifest can be decoded. However this does disable chunked transfers.

Can _http.useHTTP10(true); be added for calls to the manifest? Alternatively one could use the _http.getString(); but this is only ok for very small jsons.

[sschueller]

Here is a work around for anyone wanting to use Symphony php framework to serve the updates:

In your Controller:

// remove chunked to support arduino http 1.0 
$response = (new JsonResponse(json_encode($listOfFirmwaresArray, (JSON_UNESCAPED_SLASHES)), 200, [], true));
$response->headers->remove('Transfer-Encoding');
$response->headers->set('Content-Length', strlen($response->getContent()));
return $response;