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#!/usr/bin/env python
import asyncio
import http
import signal
import sys
import time
import websockets
async def slow_echo(websocket):
async for message in websocket:
# Block the event loop! This allows saturating a single asyncio
# process without opening an impractical number of connections.
time.sleep(0.1) # 100ms
await websocket.send(message)
async def health_check(path, request_headers):
if path == "/healthz":
return http.HTTPStatus.OK, [], b"OK\n"
if path == "/inemuri":
loop = asyncio.get_running_loop()
loop.call_later(1, time.sleep, 10)
return http.HTTPStatus.OK, [], b"Sleeping for 10s\n"
if path == "/seppuku":
loop = asyncio.get_running_loop()
loop.call_later(1, sys.exit, 69)
return http.HTTPStatus.OK, [], b"Terminating\n"
async def main():
# Set the stop condition when receiving SIGTERM.
loop = asyncio.get_running_loop()
stop = loop.create_future()
loop.add_signal_handler(signal.SIGTERM, stop.set_result, None)
async with websockets.serve(
slow_echo,
host="",
port=80,
process_request=health_check,
):
await stop
if __name__ == "__main__":
asyncio.run(main())
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