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from __future__ import annotations
import concurrent.futures
import contextlib
import functools
import sys
import threading
from typing import Generator
import hypercorn
import hypercorn.trio
import hypercorn.typing
import trio
from quart_trio import QuartTrio
# https://github.com/pgjones/hypercorn/blob/19dfb96411575a6a647cdea63fa581b48ebb9180/src/hypercorn/utils.py#L172-L178
async def graceful_shutdown(shutdown_event: threading.Event) -> None:
while True:
if shutdown_event.is_set():
return
await trio.sleep(0.1)
async def _start_server(
config: hypercorn.Config,
app: QuartTrio,
ready_event: threading.Event,
shutdown_event: threading.Event,
) -> None:
async with trio.open_nursery() as nursery:
config.bind = await nursery.start(
functools.partial(
hypercorn.trio.serve,
app,
config,
shutdown_trigger=functools.partial(graceful_shutdown, shutdown_event),
)
)
ready_event.set()
@contextlib.contextmanager
def run_hypercorn_in_thread(
config: hypercorn.Config, app: hypercorn.typing.ASGIFramework
) -> Generator[None, None, None]:
ready_event = threading.Event()
shutdown_event = threading.Event()
with concurrent.futures.ThreadPoolExecutor(
1, thread_name_prefix="hypercorn dummyserver"
) as executor:
future = executor.submit(
trio.run,
_start_server,
config,
app,
ready_event,
shutdown_event,
)
ready_event.wait(5)
if not ready_event.is_set():
raise Exception("most likely failed to start server")
try:
yield
finally:
shutdown_event.set()
future.result()
def main() -> int:
# For debugging dummyserver itself - PYTHONPATH=src python -m dummyserver.hypercornserver
from .app import hypercorn_app
config = hypercorn.Config()
config.bind = ["localhost:0"]
ready_event = threading.Event()
shutdown_event = threading.Event()
trio.run(_start_server, config, hypercorn_app, ready_event, shutdown_event)
return 0
if __name__ == "__main__":
sys.exit(main())