mirror of
https://github.com/nonebot/nonebot2.git
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236 lines
8.4 KiB
Python
236 lines
8.4 KiB
Python
"""
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"""
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import signal
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import asyncio
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from dataclasses import dataclass
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from typing import Set, List, Union, Callable, Awaitable
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import aiohttp
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from yarl import URL
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from nonebot.log import logger
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from nonebot.adapters import Bot
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from nonebot.typing import overrides
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from nonebot.config import Env, Config
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from nonebot.exception import SetupFailed
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from nonebot.drivers import ForwardDriver, HTTPConnection, HTTPRequest, WebSocket
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STARTUP_FUNC = Callable[[], Awaitable[None]]
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SHUTDOWN_FUNC = Callable[[], Awaitable[None]]
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AVAILABLE_REQUEST = Union[HTTPRequest, WebSocket]
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@dataclass
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class RequestSetup:
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adapter: str
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request: AVAILABLE_REQUEST
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poll_interval: float
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reconnect_interval: float
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class Driver(ForwardDriver):
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def __init__(self, env: Env, config: Config):
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super().__init__(env, config)
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self.startup_funcs: Set[STARTUP_FUNC] = set()
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self.shutdown_funcs: Set[SHUTDOWN_FUNC] = set()
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self.requests: List[RequestSetup] = []
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@property
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@overrides(ForwardDriver)
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def type(self) -> str:
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"""驱动名称: ``aiohttp``"""
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return "aiohttp"
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@property
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@overrides(ForwardDriver)
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def logger(self):
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return logger
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@overrides(ForwardDriver)
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def on_startup(self, func: Callable) -> Callable:
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self.startup_funcs.add(func)
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return func
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@overrides(ForwardDriver)
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def on_shutdown(self, func: Callable) -> Callable:
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self.shutdown_funcs.add(func)
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return func
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@overrides(ForwardDriver)
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def setup(self,
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adapter: str,
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request: HTTPConnection,
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poll_interval: float = 3.,
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reconnect_interval: float = 3.) -> None:
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if not isinstance(request, (HTTPRequest, WebSocket)):
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raise TypeError(f"Request Type {type(request)!r} is not supported!")
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self.requests.append(
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RequestSetup(adapter, request, poll_interval, reconnect_interval))
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@overrides(ForwardDriver)
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def run(self, *args, **kwargs):
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loop = asyncio.get_event_loop()
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signals = (signal.SIGHUP, signal.SIGTERM, signal.SIGINT)
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for s in signals:
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loop.add_signal_handler(
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s,
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lambda s=s: asyncio.create_task(self.shutdown(loop, signal=s)))
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try:
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asyncio.create_task(self.startup())
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loop.run_forever()
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finally:
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loop.close()
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async def startup(self):
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setups = []
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loop = asyncio.get_event_loop()
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for setup in self.requests:
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if isinstance(setup.request, HTTPRequest):
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setups.append(
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self._http_setup(setup.adapter, setup.request,
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setup.poll_interval))
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else:
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setups.append(
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self._ws_setup(setup.adapter, setup.request,
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setup.reconnect_interval))
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try:
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await asyncio.gather(*setups)
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except Exception as e:
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logger.opt(
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colors=True,
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exception=e).error("Application startup failed. Exiting.")
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asyncio.create_task(self.shutdown(loop))
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return
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# run startup
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cors = [startup() for startup in self.startup_funcs]
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if cors:
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try:
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await asyncio.gather(*cors)
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
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"<r><bg #f8bbd0>Error when running startup function. "
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"Ignored!</bg #f8bbd0></r>")
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async def shutdown(self,
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loop: asyncio.AbstractEventLoop,
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signal: signal.Signals = None):
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# TODO: shutdown
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# run shutdown
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cors = [shutdown() for shutdown in self.shutdown_funcs]
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if cors:
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try:
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await asyncio.gather(*cors)
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
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"<r><bg #f8bbd0>Error when running shutdown function. "
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"Ignored!</bg #f8bbd0></r>")
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tasks = [
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t for t in asyncio.all_tasks() if t is not asyncio.current_task()
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]
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for task in tasks:
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task.cancel()
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await asyncio.gather(*tasks, return_exceptions=True)
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loop.stop()
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async def _http_setup(self, adapter: str, request: HTTPRequest,
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poll_interval: float):
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BotClass = self._adapters[adapter]
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self_id, _ = await BotClass.check_permission(self, request)
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if not self_id:
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raise SetupFailed("Bot self_id get failed")
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bot = BotClass(self_id, request)
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self._bot_connect(bot)
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asyncio.create_task(self._http_loop(bot, request, poll_interval))
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async def _ws_setup(self, adapter: str, request: WebSocket,
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reconnect_interval: float):
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BotClass = self._adapters[adapter]
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self_id, _ = await BotClass.check_permission(self, request)
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if not self_id:
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raise SetupFailed("Bot self_id get failed")
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bot = BotClass(self_id, request)
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self._bot_connect(bot)
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asyncio.create_task(self._ws_loop(bot, request, reconnect_interval))
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async def _http_loop(self, bot: Bot, request: HTTPRequest,
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poll_interval: float):
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try:
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headers = request.headers
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url = URL.build(scheme=request.scheme,
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host=request.headers["host"],
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path=request.path,
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query_string=request.query_string.decode("latin-1"))
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timeout = aiohttp.ClientTimeout(30)
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async with aiohttp.ClientSession(headers=headers,
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timeout=timeout) as session:
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while True:
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try:
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async with session.request(
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request.method, url,
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data=request.body) as response:
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response.raise_for_status()
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data = await response.read()
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asyncio.create_task(bot.handle_message(data))
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except aiohttp.ClientResponseError as e:
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logger.opt(colors=True, exception=e).error(
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f"Error occurred while requesting {url}")
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await asyncio.sleep(poll_interval)
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
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"Unexpected exception occurred while http polling")
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finally:
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self._bot_disconnect(bot)
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async def _ws_loop(self, bot: Bot, request: WebSocket,
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reconnect_interval: float):
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try:
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headers = request.headers
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url = URL.build(scheme=request.scheme,
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host=request.headers["host"],
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path=request.path,
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query_string=request.query_string.decode("latin-1"))
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timeout = aiohttp.ClientTimeout(30)
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async with aiohttp.ClientSession(headers=headers,
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timeout=timeout) as session:
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while True:
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async with session.ws_connect(url) as ws:
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async for msg in ws:
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if msg.type == aiohttp.WSMsgType.text:
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asyncio.create_task(
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bot.handle_message(msg.data.encode()))
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elif msg.type == aiohttp.WSMsgType.binary:
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asyncio.create_task(bot.handle_message(
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msg.data))
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elif msg.type == aiohttp.WSMsgType.error:
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logger.opt(colors=True).error(
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"<r><bg #f8bbd0>Error while handling websocket frame. "
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"Try to reconnect...</bg></r>")
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break
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asyncio.sleep(reconnect_interval)
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
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"Unexpected exception occurred while websocket loop")
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finally:
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self._bot_disconnect(bot)
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