Python / Websockets : Opening file in socket callback reset the connection-CodePudding

I'm making a website with a python server. I'm using the websockets library.
I would like to add log files to monitor my site activity during it is running.
But if I open a file in the socket callback, the socket connection is always reset on the opening.

import asyncio
import websockets

async def handler(websocket):
    while True:
        try:
            testFile = open("log", "w") # This line reset socket connection
            testFile.write('anything')
            testFile.close()
            message = await websocket.recv()
            await websocket.send('{"cmd" : "ERROR", "msg" : "This is a test"}')
        except websockets.ConnectionClosedOK:
            break

async def main():
    async with websockets.serve(handler, "", 50000):
        await asyncio.Future()  # run forever

if __name__ == "__main__":
    asyncio.run(main())

(I have also tried wit h another socket library (simple_websocket_server) and the issue was the same)

Is there a way to avoid this behavior ? If not, Is there another way to get logs during server execution ?

CodePudding user response：

Not sure if this might help but you could create a logger using the logging library: https://docs.python.org/3/howto/logging.html