Can StreamReader replace FlowControlStreamReader ???

[kzinglzy]

From the source code, I found that the only difference between FlowControlStreamReader and StreamReader is each method at FlowControlStreamReader is a simple wrapper from StreamReader.

For example, here is the read method at FlowControlStreamReader:

self._stream.resume_stream()
 try:
        return (yield from super().read(n))
    finally:
        self._stream.pause_stream()

I also found that the FlowControlStreamReader is use to be a request payload

My confusion is that, why we have to resume_stream first and finally pause_stream at the end, can't we just use StreamReader to replace FlowControlStreamReader as a request payload ?

Thanks a lot !

[fafhrd91]

it is not possible to replace FlowControlStreamReader, it is required for flow control on socket transport. without it upload or download of big payloads would use all memory.

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