app.py - mozsearch

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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())