mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-12-12 14:35:45 +08:00
298 lines
8.2 KiB
Python
298 lines
8.2 KiB
Python
"""
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后端驱动适配基类
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=================
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各驱动请继承以下基类
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"""
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import abc
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import asyncio
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from dataclasses import dataclass
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from contextlib import asynccontextmanager
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from typing import (
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TYPE_CHECKING,
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Any,
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Set,
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Dict,
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Type,
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Callable,
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Awaitable,
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AsyncGenerator,
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)
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from ._model import URL as URL
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from nonebot.log import logger
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from nonebot.utils import escape_tag
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from ._model import Request as Request
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from nonebot.config import Env, Config
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from ._model import Response as Response
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from ._model import WebSocket as WebSocket
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from ._model import HTTPVersion as HTTPVersion
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from nonebot.typing import T_BotConnectionHook, T_BotDisconnectionHook
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if TYPE_CHECKING:
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from nonebot.adapters import Bot, Adapter
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class Driver(abc.ABC):
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"""
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Driver 基类。
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"""
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_adapters: Dict[str, "Adapter"] = {}
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"""
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:类型: ``Dict[str, Adapter]``
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:说明: 已注册的适配器列表
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"""
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_bot_connection_hook: Set[T_BotConnectionHook] = set()
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"""
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:类型: ``Set[T_BotConnectionHook]``
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:说明: Bot 连接建立时执行的函数
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"""
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_bot_disconnection_hook: Set[T_BotDisconnectionHook] = set()
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"""
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:类型: ``Set[T_BotDisconnectionHook]``
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:说明: Bot 连接断开时执行的函数
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"""
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def __init__(self, env: Env, config: Config):
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"""
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:参数:
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* ``env: Env``: 包含环境信息的 Env 对象
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* ``config: Config``: 包含配置信息的 Config 对象
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"""
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self.env: str = env.environment
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"""
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:类型: ``str``
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:说明: 环境名称
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"""
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self.config: Config = config
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"""
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:类型: ``Config``
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:说明: 配置对象
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"""
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self._clients: Dict[str, "Bot"] = {}
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"""
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:类型: ``Dict[str, Bot]``
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:说明: 已连接的 Bot
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"""
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@property
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def bots(self) -> Dict[str, "Bot"]:
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"""
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:类型:
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``Dict[str, Bot]``
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:说明:
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获取当前所有已连接的 Bot
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"""
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return self._clients
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def register_adapter(self, adapter: Type["Adapter"], **kwargs) -> None:
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"""
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:说明:
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注册一个协议适配器
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:参数:
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* ``name: str``: 适配器名称，用于在连接时进行识别
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* ``adapter: Type[Bot]``: 适配器 Class
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* ``**kwargs``: 其他传递给适配器的参数
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"""
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name = adapter.get_name()
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if name in self._adapters:
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logger.opt(colors=True).debug(
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f'Adapter "<y>{escape_tag(name)}</y>" already exists'
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)
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return
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self._adapters[name] = adapter(self, **kwargs)
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logger.opt(colors=True).debug(
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f'Succeeded to load adapter "<y>{escape_tag(name)}</y>"'
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)
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@property
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@abc.abstractmethod
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def type(self) -> str:
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"""驱动类型名称"""
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raise NotImplementedError
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@property
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@abc.abstractmethod
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def logger(self):
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"""驱动专属 logger 日志记录器"""
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raise NotImplementedError
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@abc.abstractmethod
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def run(self, *args, **kwargs):
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"""
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:说明:
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启动驱动框架
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:参数:
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* ``*args``
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* ``**kwargs``
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"""
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logger.opt(colors=True).debug(
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f"<g>Loaded adapters: {escape_tag(', '.join(self._adapters))}</g>"
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)
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@abc.abstractmethod
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def on_startup(self, func: Callable) -> Callable:
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"""注册一个在驱动启动时运行的函数"""
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raise NotImplementedError
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@abc.abstractmethod
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def on_shutdown(self, func: Callable) -> Callable:
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"""注册一个在驱动停止时运行的函数"""
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raise NotImplementedError
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def on_bot_connect(self, func: T_BotConnectionHook) -> T_BotConnectionHook:
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"""
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:说明:
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装饰一个函数使他在 bot 通过 WebSocket 连接成功时执行。
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:函数参数:
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* ``bot: Bot``: 当前连接上的 Bot 对象
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"""
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self._bot_connection_hook.add(func)
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return func
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def on_bot_disconnect(self, func: T_BotDisconnectionHook) -> T_BotDisconnectionHook:
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"""
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:说明:
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装饰一个函数使他在 bot 通过 WebSocket 连接断开时执行。
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:函数参数:
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* ``bot: Bot``: 当前连接上的 Bot 对象
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"""
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self._bot_disconnection_hook.add(func)
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return func
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def _bot_connect(self, bot: "Bot") -> None:
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"""在 WebSocket 连接成功后，调用该函数来注册 bot 对象"""
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if bot.self_id in self._clients:
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raise RuntimeError(f"Duplicate bot connection with id {bot.self_id}")
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self._clients[bot.self_id] = bot
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async def _run_hook(bot: "Bot") -> None:
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coros = list(map(lambda x: x(bot), self._bot_connection_hook))
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if coros:
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try:
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await asyncio.gather(*coros)
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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 WebSocketConnection hook. "
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"Running cancelled!</bg #f8bbd0></r>"
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)
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asyncio.create_task(_run_hook(bot))
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def _bot_disconnect(self, bot: "Bot") -> None:
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"""在 WebSocket 连接断开后，调用该函数来注销 bot 对象"""
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if bot.self_id in self._clients:
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del self._clients[bot.self_id]
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async def _run_hook(bot: "Bot") -> None:
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coros = list(map(lambda x: x(bot), self._bot_disconnection_hook))
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if coros:
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try:
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await asyncio.gather(*coros)
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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 WebSocketDisConnection hook. "
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"Running cancelled!</bg #f8bbd0></r>"
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)
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asyncio.create_task(_run_hook(bot))
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class ForwardMixin(abc.ABC):
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@property
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@abc.abstractmethod
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def type(self) -> str:
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raise NotImplementedError
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@abc.abstractmethod
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async def request(self, setup: Request) -> Response:
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raise NotImplementedError
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@abc.abstractmethod
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@asynccontextmanager
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async def websocket(self, setup: Request) -> AsyncGenerator[WebSocket, None]:
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raise NotImplementedError
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yield # used for static type checking's generator detection
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class ForwardDriver(Driver, ForwardMixin):
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"""
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Forward Driver 基类。将客户端框架封装，以满足适配器使用。
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"""
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class ReverseDriver(Driver):
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"""
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Reverse Driver 基类。将后端框架封装，以满足适配器使用。
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"""
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@property
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@abc.abstractmethod
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def server_app(self) -> Any:
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"""驱动 APP 对象"""
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raise NotImplementedError
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@property
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@abc.abstractmethod
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def asgi(self) -> Any:
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"""驱动 ASGI 对象"""
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raise NotImplementedError
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@abc.abstractmethod
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def setup_http_server(self, setup: "HTTPServerSetup") -> None:
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raise NotImplementedError
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@abc.abstractmethod
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def setup_websocket_server(self, setup: "WebSocketServerSetup") -> None:
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raise NotImplementedError
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def combine_driver(driver: Type[Driver], *mixins: Type[ForwardMixin]) -> Type[Driver]:
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# check first
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assert issubclass(driver, Driver), "`driver` must be subclass of Driver"
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assert all(
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map(lambda m: issubclass(m, ForwardMixin), mixins)
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), "`mixins` must be subclass of ForwardMixin"
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class CombinedDriver(*mixins, driver, ForwardDriver): # type: ignore
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@property
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def type(self) -> str:
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return (
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driver.type.__get__(self)
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+ "+"
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+ "+".join(map(lambda x: x.type.__get__(self), mixins))
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)
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return CombinedDriver
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@dataclass
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class HTTPServerSetup:
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path: URL # path should not be absolute, check it by URL.is_absolute() == False
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method: str
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name: str
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handle_func: Callable[[Request], Awaitable[Response]]
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@dataclass
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class WebSocketServerSetup:
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path: URL # path should not be absolute, check it by URL.is_absolute() == False
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name: str
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handle_func: Callable[[WebSocket], Awaitable[Any]]
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