nonebot2/nonebot/drivers/__init__.py

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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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import abc
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import asyncio
from typing import Set, Dict, Type, Optional, Callable, TYPE_CHECKING
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from nonebot.log import logger
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from nonebot.config import Env, Config
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from nonebot.typing import T_WebSocketConnectionHook, T_WebSocketDisconnectionHook
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if TYPE_CHECKING:
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from nonebot.adapters import Bot
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class Driver(abc.ABC):
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"""
Driver 基类将后端框架封装以满足适配器使用
"""
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_adapters: Dict[str, Type["Bot"]] = {}
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"""
:类型: ``Dict[str, Type[Bot]]``
:说明: 已注册的适配器列表
"""
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_ws_connection_hook: Set[T_WebSocketConnectionHook] = set()
"""
:类型: ``Set[T_WebSocketConnectionHook]``
:说明: WebSocket 连接建立时执行的函数
"""
_ws_disconnection_hook: Set[T_WebSocketDisconnectionHook] = set()
"""
:类型: ``Set[T_WebSocketDisconnectionHook]``
:说明: WebSocket 连接断开时执行的函数
"""
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@abc.abstractmethod
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def __init__(self, env: Env, config: Config):
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"""
:参数:
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* ``env: Env``: 包含环境信息的 Env 对象
* ``config: Config``: 包含配置信息的 Config 对象
"""
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self.env = env.environment
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"""
:类型: ``str``
:说明: 环境名称
"""
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self.config = config
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"""
:类型: ``Config``
:说明: 配置对象
"""
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self._clients: Dict[str, "Bot"] = {}
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"""
:类型: ``Dict[str, Bot]``
:说明: 已连接的 Bot
"""
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def register_adapter(self, name: str, adapter: Type["Bot"]):
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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
* ``adapter: Type[Bot]``: 适配器 Class
"""
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self._adapters[name] = adapter
adapter.register(self, self.config)
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logger.opt(
colors=True).debug(f'Succeeded to load adapter "<y>{name}</y>"')
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@property
@abc.abstractmethod
def type(self):
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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 server_app(self):
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"""驱动 APP 对象"""
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raise NotImplementedError
@property
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@abc.abstractmethod
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def asgi(self):
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"""驱动 ASGI 对象"""
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raise NotImplementedError
@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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@property
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def bots(self) -> Dict[str, "Bot"]:
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"""
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:类型:
``Dict[str, Bot]``
:说明:
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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@abc.abstractmethod
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
@abc.abstractmethod
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_WebSocketConnectionHook) -> T_WebSocketConnectionHook:
"""
:说明:
装饰一个函数使他在 bot 通过 WebSocket 连接成功时执行
:函数参数:
* ``bot: Bot``: 当前连接上的 Bot 对象
"""
self._ws_connection_hook.add(func)
return func
def on_bot_disconnect(
self,
func: T_WebSocketDisconnectionHook) -> T_WebSocketDisconnectionHook:
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"""
:说明:
装饰一个函数使他在 bot 通过 WebSocket 连接断开时执行
:函数参数:
* ``bot: Bot``: 当前连接上的 Bot 对象
"""
self._ws_disconnection_hook.add(func)
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"""
self._clients[bot.self_id] = bot
async def _run_hook(bot: "Bot") -> None:
coros = list(map(lambda x: x(bot), self._ws_connection_hook))
if coros:
try:
await asyncio.gather(*coros)
except Exception as e:
logger.opt(colors=True, exception=e).error(
"<r><bg #f8bbd0>Error when running WebSocketConnection hook. "
"Running cancelled!</bg #f8bbd0></r>")
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"""
if bot.self_id in self._clients:
del self._clients[bot.self_id]
async def _run_hook(bot: "Bot") -> None:
coros = list(map(lambda x: x(bot), self._ws_disconnection_hook))
if coros:
try:
await asyncio.gather(*coros)
except Exception as e:
logger.opt(colors=True, exception=e).error(
"<r><bg #f8bbd0>Error when running WebSocketDisConnection hook. "
"Running cancelled!</bg #f8bbd0></r>")
asyncio.create_task(_run_hook(bot))
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@abc.abstractmethod
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def run(self,
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host: Optional[str] = None,
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port: Optional[int] = None,
*args,
**kwargs):
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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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* ``host: Optional[str]``: 驱动绑定 IP
* ``post: Optional[int]``: 驱动绑定端口
* ``*args``
* ``**kwargs``
"""
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logger.opt(colors=True).debug(
f"<g>Loaded adapters: {', '.join(self._adapters)}</g>")
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@abc.abstractmethod
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async def _handle_http(self):
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"""用于处理 HTTP 类型请求的函数"""
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raise NotImplementedError
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@abc.abstractmethod
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async def _handle_ws_reverse(self):
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"""用于处理 WebSocket 类型请求的函数"""
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raise NotImplementedError
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class WebSocket(object):
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"""WebSocket 连接封装,统一接口方便外部调用。"""
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@abc.abstractmethod
def __init__(self, websocket):
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"""
:参数:
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* ``websocket: Any``: WebSocket 连接对象
"""
self._websocket = websocket
@property
def websocket(self):
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"""WebSocket 连接对象"""
return self._websocket
@property
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@abc.abstractmethod
def closed(self):
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"""
:类型: ``bool``
:说明: 连接是否已经关闭
"""
raise NotImplementedError
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@abc.abstractmethod
async def accept(self):
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"""接受 WebSocket 连接请求"""
raise NotImplementedError
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@abc.abstractmethod
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async def close(self, code: int):
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"""关闭 WebSocket 连接请求"""
raise NotImplementedError
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@abc.abstractmethod
async def receive(self) -> dict:
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"""接收一条 WebSocket 信息"""
raise NotImplementedError
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@abc.abstractmethod
async def send(self, data: dict):
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"""发送一条 WebSocket 信息"""
raise NotImplementedError