mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-28 04:56:57 +08:00
433 lines
16 KiB
Python
433 lines
16 KiB
Python
"""
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AIOHTTP 驱动适配
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================
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本驱动仅支持客户端连接
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"""
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import signal
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import asyncio
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import threading
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from dataclasses import dataclass
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from typing import Set, List, Union, Callable, Optional, Awaitable, cast
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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.utils import escape_tag
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from nonebot.config import Env, Config
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from nonebot.drivers import WebSocket as BaseWebSocket
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from nonebot.drivers import (HTTPRequest, ForwardDriver, WebSocketSetup,
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HTTPPollingSetup)
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STARTUP_FUNC = Callable[[], Awaitable[None]]
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SHUTDOWN_FUNC = Callable[[], Awaitable[None]]
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HTTPPOLLING_SETUP = Union[HTTPPollingSetup,
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Callable[[], Awaitable[HTTPPollingSetup]]]
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WEBSOCKET_SETUP = Union[WebSocketSetup, Callable[[], Awaitable[WebSocketSetup]]]
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HANDLED_SIGNALS = (
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signal.SIGINT, # Unix signal 2. Sent by Ctrl+C.
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signal.SIGTERM, # Unix signal 15. Sent by `kill <pid>`.
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)
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class Driver(ForwardDriver):
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"""
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AIOHTTP 驱动框架
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"""
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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.http_pollings: List[HTTPPOLLING_SETUP] = []
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self.websockets: List[WEBSOCKET_SETUP] = []
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self.connections: List[asyncio.Task] = []
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self.should_exit: asyncio.Event = asyncio.Event()
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self.force_exit: bool = False
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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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"""aiohttp driver 使用的 logger"""
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return logger
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@overrides(ForwardDriver)
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def on_startup(self, func: STARTUP_FUNC) -> STARTUP_FUNC:
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"""
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:说明:
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注册一个启动时执行的函数
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:参数:
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* ``func: Callable[[], Awaitable[None]]``
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"""
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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: SHUTDOWN_FUNC) -> SHUTDOWN_FUNC:
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"""
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:说明:
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注册一个停止时执行的函数
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:参数:
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* ``func: Callable[[], Awaitable[None]]``
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"""
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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_http_polling(self, setup: HTTPPOLLING_SETUP) -> None:
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"""
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:说明:
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注册一个 HTTP 轮询连接，如果传入一个函数，则该函数会在每次连接时被调用
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:参数:
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* ``setup: Union[HTTPPollingSetup, Callable[[], Awaitable[HTTPPollingSetup]]]``
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"""
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self.http_pollings.append(setup)
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@overrides(ForwardDriver)
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def setup_websocket(self, setup: WEBSOCKET_SETUP) -> None:
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"""
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:说明:
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注册一个 WebSocket 连接，如果传入一个函数，则该函数会在每次重连时被调用
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:参数:
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* ``setup: Union[WebSocketSetup, Callable[[], Awaitable[WebSocketSetup]]]``
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"""
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self.websockets.append(setup)
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@overrides(ForwardDriver)
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def run(self, *args, **kwargs):
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"""启动 aiohttp driver"""
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super().run(*args, **kwargs)
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loop = asyncio.get_event_loop()
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loop.run_until_complete(self.serve())
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async def serve(self):
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self.install_signal_handlers()
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await self.startup()
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if self.should_exit.is_set():
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return
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await self.main_loop()
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await self.shutdown()
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async def startup(self):
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for setup in self.http_pollings:
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self.connections.append(asyncio.create_task(self._http_loop(setup)))
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for setup in self.websockets:
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self.connections.append(asyncio.create_task(self._ws_loop(setup)))
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logger.info("Application startup completed.")
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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 main_loop(self):
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await self.should_exit.wait()
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async def shutdown(self):
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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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for task in self.connections:
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if not task.done():
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task.cancel()
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await asyncio.sleep(0.1)
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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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if tasks and not self.force_exit:
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logger.info("Waiting for tasks to finish. (CTRL+C to force quit)")
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while tasks and not self.force_exit:
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await asyncio.sleep(0.1)
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tasks = [
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t for t in asyncio.all_tasks()
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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 = asyncio.get_event_loop()
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loop.stop()
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def install_signal_handlers(self) -> None:
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if threading.current_thread() is not threading.main_thread():
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# Signals can only be listened to from the main thread.
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return
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loop = asyncio.get_event_loop()
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try:
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for sig in HANDLED_SIGNALS:
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loop.add_signal_handler(sig, self.handle_exit, sig, None)
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except NotImplementedError:
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# Windows
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for sig in HANDLED_SIGNALS:
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signal.signal(sig, self.handle_exit)
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def handle_exit(self, sig, frame):
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if self.should_exit.is_set():
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self.force_exit = True
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else:
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self.should_exit.set()
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async def _http_loop(self, setup: HTTPPOLLING_SETUP):
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async def _build_request(
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setup: HTTPPollingSetup) -> Optional[HTTPRequest]:
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url = URL(setup.url)
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if not url.is_absolute() or not url.host:
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logger.opt(colors=True).error(
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f"<r><bg #f8bbd0>Error parsing url {escape_tag(str(url))}</bg #f8bbd0></r>"
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)
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return
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host = f"{url.host}:{url.port}" if url.port else url.host
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return HTTPRequest(setup.http_version, url.scheme, url.path,
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url.raw_query_string.encode("latin-1"), {
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**setup.headers, "host": host
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}, setup.method, setup.body)
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bot: Optional[Bot] = None
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request: Optional[HTTPRequest] = None
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setup_: Optional[HTTPPollingSetup] = None
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logger.opt(colors=True).info(
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f"Start http polling for <y>{escape_tag(setup.adapter.upper())} "
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f"Bot {escape_tag(setup.self_id)}</y>")
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try:
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async with aiohttp.ClientSession() as session:
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while not self.should_exit.is_set():
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try:
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if callable(setup):
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setup_ = await setup()
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else:
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setup_ = setup
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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 while parsing setup "
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f"{escape_tag(repr(setup))}.</bg #f8bbd0></r>")
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await asyncio.sleep(3)
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continue
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setup_ = cast(HTTPPollingSetup, setup_)
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if not bot:
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request = await _build_request(setup_)
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if not request:
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return
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BotClass = self._adapters[setup.adapter]
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bot = BotClass(setup.self_id, request)
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self._bot_connect(bot)
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elif callable(setup):
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request = await _build_request(setup_)
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if not request:
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await asyncio.sleep(setup_.poll_interval)
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continue
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bot.request = request
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request = cast(HTTPRequest, request)
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headers = request.headers
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timeout = aiohttp.ClientTimeout(30)
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version: aiohttp.HttpVersion
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if request.http_version == "1.0":
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version = aiohttp.HttpVersion10
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elif request.http_version == "1.1":
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version = aiohttp.HttpVersion11
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else:
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logger.opt(colors=True).error(
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"<r><bg #f8bbd0>Unsupported HTTP Version "
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f"{escape_tag(request.http_version)}</bg #f8bbd0></r>"
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)
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return
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logger.debug(
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f"Bot {setup_.self_id} from adapter {setup_.adapter} request {setup_.url}"
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)
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try:
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async with session.request(request.method,
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setup_.url,
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data=request.body,
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headers=headers,
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timeout=timeout,
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version=version) 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"<r><bg #f8bbd0>Error occurred while requesting {escape_tag(setup_.url)}. "
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"Try to reconnect...</bg #f8bbd0></r>")
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await asyncio.sleep(setup_.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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"<r><bg #f8bbd0>Unexpected exception occurred "
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"while http polling</bg #f8bbd0></r>")
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finally:
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if bot:
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self._bot_disconnect(bot)
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async def _ws_loop(self, setup: WEBSOCKET_SETUP):
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bot: Optional[Bot] = None
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try:
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async with aiohttp.ClientSession() as session:
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while True:
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try:
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if callable(setup):
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setup_ = await setup()
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else:
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setup_ = setup
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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 while parsing setup "
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f"{escape_tag(repr(setup))}.</bg #f8bbd0></r>")
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await asyncio.sleep(3)
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continue
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url = URL(setup_.url)
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if not url.is_absolute() or not url.host:
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logger.opt(colors=True).error(
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f"<r><bg #f8bbd0>Error parsing url {escape_tag(str(url))}</bg #f8bbd0></r>"
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)
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await asyncio.sleep(setup_.reconnect_interval)
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continue
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host = f"{url.host}:{url.port}" if url.port else url.host
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headers = {**setup_.headers, "host": host}
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logger.debug(
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f"Bot {setup_.self_id} from adapter {setup_.adapter} connecting to {url}"
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)
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try:
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async with session.ws_connect(url,
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headers=headers,
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timeout=30.) as ws:
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logger.opt(colors=True).info(
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f"WebSocket Connection to <y>{escape_tag(setup_.adapter.upper())} "
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f"Bot {escape_tag(setup_.self_id)}</y> succeeded!"
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)
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request = WebSocket(
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"1.1", url.scheme, url.path,
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url.raw_query_string.encode("latin-1"), headers,
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ws)
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BotClass = self._adapters[setup_.adapter]
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bot = BotClass(setup_.self_id, request)
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self._bot_connect(bot)
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while not self.should_exit.is_set():
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msg = await ws.receive()
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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(
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bot.handle_message(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 #f8bbd0></r>")
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break
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else:
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logger.opt(colors=True).error(
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"<r><bg #f8bbd0>WebSocket connection closed by peer. "
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"Try to reconnect...</bg #f8bbd0></r>")
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break
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except (aiohttp.ClientResponseError,
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aiohttp.ClientConnectionError) as e:
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logger.opt(colors=True, exception=e).error(
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f"<r><bg #f8bbd0>Error while connecting to {escape_tag(str(url))}. "
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"Try to reconnect...</bg #f8bbd0></r>")
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finally:
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if bot:
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self._bot_disconnect(bot)
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bot = None
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await asyncio.sleep(setup_.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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"<r><bg #f8bbd0>Unexpected exception occurred "
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"while websocket loop</bg #f8bbd0></r>")
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@dataclass
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class WebSocket(BaseWebSocket):
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websocket: aiohttp.ClientWebSocketResponse = None # type: ignore
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@property
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@overrides(BaseWebSocket)
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def closed(self):
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return self.websocket.closed
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@overrides(BaseWebSocket)
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async def accept(self):
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raise NotImplementedError
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@overrides(BaseWebSocket)
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async def close(self, code: int = 1000):
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await self.websocket.close(code=code)
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@overrides(BaseWebSocket)
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async def receive(self) -> str:
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return await self.websocket.receive_str()
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@overrides(BaseWebSocket)
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async def receive_bytes(self) -> bytes:
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return await self.websocket.receive_bytes()
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@overrides(BaseWebSocket)
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async def send(self, data: str) -> None:
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await self.websocket.send_str(data)
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@overrides(BaseWebSocket)
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async def send_bytes(self, data: bytes) -> None:
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await self.websocket.send_bytes(data)
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