[Python] What should HTTP 201 response body be when responding to a POST request with large...

I have a FastAPI server implemented in Python, and I am sending large data (~2 GB) to the server via a POST request. Once the request is processed on server side, I would like to return a 201 "Created" response to the client.

A 201 response should have a body, so I should not send a response with an empty body (https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST), but at the same time, I don't want to send back the newly created resource, as it is so large, and the client doesn't need the resource at the point of the POST request. Alternatively, I would be tempted to respond with a 204 "No Content", but it doesn't seem to be the recommended response for a successful POST request.

So assuming a 201 response is sent, what should be the body of the response to avoid large data sent back for no reason?

Here is a minimal code describing my issue, currently returning a 201 response with an empty body:

from fastapi import FastAPI, HTTPException, Response, status

app = FastAPI()


@app.post("/data", status_code=status.HTTP_201_CREATED)
async def send_data(data, response: Response):
try:
# process data on the server
# ...
pass
except Exception as e:
raise HTTPException(status.HTTP_500_INTERNAL_SERVER_ERROR, e)
return response # response with empty body

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