diff options
Diffstat (limited to 'third_party/python/aiohttp/aiohttp/worker.py')
| -rw-r--r-- | third_party/python/aiohttp/aiohttp/worker.py | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/third_party/python/aiohttp/aiohttp/worker.py b/third_party/python/aiohttp/aiohttp/worker.py new file mode 100644 index 0000000000..67b244bbd3 --- /dev/null +++ b/third_party/python/aiohttp/aiohttp/worker.py @@ -0,0 +1,252 @@ +"""Async gunicorn worker for aiohttp.web""" + +import asyncio +import os +import re +import signal +import sys +from types import FrameType +from typing import Any, Awaitable, Callable, Optional, Union # noqa + +from gunicorn.config import AccessLogFormat as GunicornAccessLogFormat +from gunicorn.workers import base + +from aiohttp import web + +from .helpers import set_result +from .web_app import Application +from .web_log import AccessLogger + +try: + import ssl + + SSLContext = ssl.SSLContext +except ImportError: # pragma: no cover + ssl = None # type: ignore + SSLContext = object # type: ignore + + +__all__ = ("GunicornWebWorker", "GunicornUVLoopWebWorker", "GunicornTokioWebWorker") + + +class GunicornWebWorker(base.Worker): + + DEFAULT_AIOHTTP_LOG_FORMAT = AccessLogger.LOG_FORMAT + DEFAULT_GUNICORN_LOG_FORMAT = GunicornAccessLogFormat.default + + def __init__(self, *args: Any, **kw: Any) -> None: # pragma: no cover + super().__init__(*args, **kw) + + self._task = None # type: Optional[asyncio.Task[None]] + self.exit_code = 0 + self._notify_waiter = None # type: Optional[asyncio.Future[bool]] + + def init_process(self) -> None: + # create new event_loop after fork + asyncio.get_event_loop().close() + + self.loop = asyncio.new_event_loop() + asyncio.set_event_loop(self.loop) + + super().init_process() + + def run(self) -> None: + self._task = self.loop.create_task(self._run()) + + try: # ignore all finalization problems + self.loop.run_until_complete(self._task) + except Exception: + self.log.exception("Exception in gunicorn worker") + if sys.version_info >= (3, 6): + self.loop.run_until_complete(self.loop.shutdown_asyncgens()) + self.loop.close() + + sys.exit(self.exit_code) + + async def _run(self) -> None: + if isinstance(self.wsgi, Application): + app = self.wsgi + elif asyncio.iscoroutinefunction(self.wsgi): + app = await self.wsgi() + else: + raise RuntimeError( + "wsgi app should be either Application or " + "async function returning Application, got {}".format(self.wsgi) + ) + access_log = self.log.access_log if self.cfg.accesslog else None + runner = web.AppRunner( + app, + logger=self.log, + keepalive_timeout=self.cfg.keepalive, + access_log=access_log, + access_log_format=self._get_valid_log_format(self.cfg.access_log_format), + ) + await runner.setup() + + ctx = self._create_ssl_context(self.cfg) if self.cfg.is_ssl else None + + runner = runner + assert runner is not None + server = runner.server + assert server is not None + for sock in self.sockets: + site = web.SockSite( + runner, + sock, + ssl_context=ctx, + shutdown_timeout=self.cfg.graceful_timeout / 100 * 95, + ) + await site.start() + + # If our parent changed then we shut down. + pid = os.getpid() + try: + while self.alive: # type: ignore + self.notify() + + cnt = server.requests_count + if self.cfg.max_requests and cnt > self.cfg.max_requests: + self.alive = False + self.log.info("Max requests, shutting down: %s", self) + + elif pid == os.getpid() and self.ppid != os.getppid(): + self.alive = False + self.log.info("Parent changed, shutting down: %s", self) + else: + await self._wait_next_notify() + except BaseException: + pass + + await runner.cleanup() + + def _wait_next_notify(self) -> "asyncio.Future[bool]": + self._notify_waiter_done() + + loop = self.loop + assert loop is not None + self._notify_waiter = waiter = loop.create_future() + self.loop.call_later(1.0, self._notify_waiter_done, waiter) + + return waiter + + def _notify_waiter_done( + self, waiter: Optional["asyncio.Future[bool]"] = None + ) -> None: + if waiter is None: + waiter = self._notify_waiter + if waiter is not None: + set_result(waiter, True) + + if waiter is self._notify_waiter: + self._notify_waiter = None + + def init_signals(self) -> None: + # Set up signals through the event loop API. + + self.loop.add_signal_handler( + signal.SIGQUIT, self.handle_quit, signal.SIGQUIT, None + ) + + self.loop.add_signal_handler( + signal.SIGTERM, self.handle_exit, signal.SIGTERM, None + ) + + self.loop.add_signal_handler( + signal.SIGINT, self.handle_quit, signal.SIGINT, None + ) + + self.loop.add_signal_handler( + signal.SIGWINCH, self.handle_winch, signal.SIGWINCH, None + ) + + self.loop.add_signal_handler( + signal.SIGUSR1, self.handle_usr1, signal.SIGUSR1, None + ) + + self.loop.add_signal_handler( + signal.SIGABRT, self.handle_abort, signal.SIGABRT, None + ) + + # Don't let SIGTERM and SIGUSR1 disturb active requests + # by interrupting system calls + signal.siginterrupt(signal.SIGTERM, False) + signal.siginterrupt(signal.SIGUSR1, False) + + def handle_quit(self, sig: int, frame: FrameType) -> None: + self.alive = False + + # worker_int callback + self.cfg.worker_int(self) + + # wakeup closing process + self._notify_waiter_done() + + def handle_abort(self, sig: int, frame: FrameType) -> None: + self.alive = False + self.exit_code = 1 + self.cfg.worker_abort(self) + sys.exit(1) + + @staticmethod + def _create_ssl_context(cfg: Any) -> "SSLContext": + """Creates SSLContext instance for usage in asyncio.create_server. + + See ssl.SSLSocket.__init__ for more details. + """ + if ssl is None: # pragma: no cover + raise RuntimeError("SSL is not supported.") + + ctx = ssl.SSLContext(cfg.ssl_version) + ctx.load_cert_chain(cfg.certfile, cfg.keyfile) + ctx.verify_mode = cfg.cert_reqs + if cfg.ca_certs: + ctx.load_verify_locations(cfg.ca_certs) + if cfg.ciphers: + ctx.set_ciphers(cfg.ciphers) + return ctx + + def _get_valid_log_format(self, source_format: str) -> str: + if source_format == self.DEFAULT_GUNICORN_LOG_FORMAT: + return self.DEFAULT_AIOHTTP_LOG_FORMAT + elif re.search(r"%\([^\)]+\)", source_format): + raise ValueError( + "Gunicorn's style options in form of `%(name)s` are not " + "supported for the log formatting. Please use aiohttp's " + "format specification to configure access log formatting: " + "http://docs.aiohttp.org/en/stable/logging.html" + "#format-specification" + ) + else: + return source_format + + +class GunicornUVLoopWebWorker(GunicornWebWorker): + def init_process(self) -> None: + import uvloop + + # Close any existing event loop before setting a + # new policy. + asyncio.get_event_loop().close() + + # Setup uvloop policy, so that every + # asyncio.get_event_loop() will create an instance + # of uvloop event loop. + asyncio.set_event_loop_policy(uvloop.EventLoopPolicy()) + + super().init_process() + + +class GunicornTokioWebWorker(GunicornWebWorker): + def init_process(self) -> None: # pragma: no cover + import tokio + + # Close any existing event loop before setting a + # new policy. + asyncio.get_event_loop().close() + + # Setup tokio policy, so that every + # asyncio.get_event_loop() will create an instance + # of tokio event loop. + asyncio.set_event_loop_policy(tokio.EventLoopPolicy()) + + super().init_process() |