A http server

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Hi,
I'm trying to set up a http server to handle a single POST request.
That POST request is to upload a huge file and the server is supposed
to handle it with the just POST request.
With my python sample code, multiple post requests are working well,
but that is not my solution.
I need a single POST request handling in the http server side.
Does anyone have a good idea for this case or sample code?
TIA