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#!/usr/bin/env python
import asyncio
import signal
import websockets
async def echo(websocket, path):
async for message in websocket:
await websocket.send(message)
async def echo_server(stop):
async with websockets.serve(echo, "localhost", 8765):
await stop
loop = asyncio.get_event_loop()
# The stop condition is set when receiving SIGTERM.
stop = loop.create_future()
loop.add_signal_handler(signal.SIGTERM, stop.set_result, None)
# Run the server until the stop condition is met.
loop.run_until_complete(echo_server(stop))
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