Support for reading and writing streaming frames websockets

[shaohme]

Is your feature request related to a problem?

I sometimes need to read/write a large incoming binary websocket stream of frames before its finished (FIN) frame arrives, so that it does not need to buffer everything before handing my application an assembled binary websocket message. I accept, of course, that the transport could be interrupted at any time.

Describe the solution you'd like

aiohttp already implements https://docs.aiohttp.org/en/stable/streams.html and a similar API could be nice to have for its websocket-request/response implementation.

Describe alternatives you've considered

python-websockets https://websockets.readthedocs.io/en/stable/ already have this, but only limited to its Sans writer, and in its 'threading/sync' API.

Related component

Server, Client

Additional context

No response

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