What's the right way to handle chunked json response with swagger and autogenerated php client?

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Solution:

Do answer my own question it is possible, but not easily - meaning there is no option or parameter.

First create a class that extends the autogenerated API class. There you have access to all of the protected methods. We assume the endpoint or api method is called testMethodGet. The only thing that can be reused is the request method, i.e. testMethodGetRequest, but it does all of the client side validation and transforming of input data, so that's already a big win. Do also get some of the boilerplate result validation you can copy the "http info method", i.e. testMethodGetWithHttpInfo (use async version if you wish). Remove the if/else block after $responseBody = $response->getBody(); and in the return replace the ObjectSearializer line with just $responseBody.

What you are now getting back is the body as PSR7 stream, but there is one last catch. By default the whole response is drained into a temporary file. To really stream the result body from the server in the created method add an option to $options: $options['stream'] = true; Now the method returns as soon as the body is started. No need to wait for the whole body content.

One more thing. As the result is a PSR7 stream you can use $stream->detach() to get the PHP stream resource if you prefer to use the normal file and stream methods.