mirror of
https://github.com/nonebot/nonebot2.git
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138 lines
3.9 KiB
Python
138 lines
3.9 KiB
Python
"""[websockets](https://websockets.readthedocs.io/) 驱动适配
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```bash
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nb driver install websockets
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# 或者
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pip install nonebot2[websockets]
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```
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:::tip 提示
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本驱动仅支持客户端 WebSocket 连接
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:::
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FrontMatter:
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sidebar_position: 4
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description: nonebot.drivers.websockets 模块
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"""
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import logging
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from functools import wraps
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from contextlib import asynccontextmanager
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from typing_extensions import ParamSpec, override
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from typing import Type, Union, TypeVar, Callable, Awaitable, AsyncGenerator
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from nonebot.log import LoguruHandler
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from nonebot.drivers import Request, Response
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from nonebot.exception import WebSocketClosed
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from nonebot.drivers.none import Driver as NoneDriver
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from nonebot.drivers import WebSocket as BaseWebSocket
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from nonebot.drivers import ForwardMixin, ForwardDriver, combine_driver
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try:
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from websockets.exceptions import ConnectionClosed
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from websockets.legacy.client import Connect, WebSocketClientProtocol
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except ModuleNotFoundError as e: # pragma: no cover
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raise ImportError(
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"Please install websockets first to use this driver. "
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"Install with pip: `pip install nonebot2[websockets]`"
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) from e
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T = TypeVar("T")
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P = ParamSpec("P")
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logger = logging.Logger("websockets.client", "INFO")
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logger.addHandler(LoguruHandler())
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def catch_closed(func: Callable[P, Awaitable[T]]) -> Callable[P, Awaitable[T]]:
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@wraps(func)
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async def decorator(*args: P.args, **kwargs: P.kwargs) -> T:
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try:
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return await func(*args, **kwargs)
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except ConnectionClosed as e:
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if e.rcvd_then_sent:
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raise WebSocketClosed(e.rcvd.code, e.rcvd.reason) # type: ignore
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else:
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raise WebSocketClosed(e.sent.code, e.sent.reason) # type: ignore
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return decorator
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class Mixin(ForwardMixin):
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"""Websockets Mixin"""
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@property
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@override
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def type(self) -> str:
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return "websockets"
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@override
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async def request(self, setup: Request) -> Response:
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return await super(Mixin, self).request(setup)
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@override
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@asynccontextmanager
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async def websocket(self, setup: Request) -> AsyncGenerator["WebSocket", None]:
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connection = Connect(
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str(setup.url),
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extra_headers={**setup.headers, **setup.cookies.as_header(setup)},
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open_timeout=setup.timeout,
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)
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async with connection as ws:
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yield WebSocket(request=setup, websocket=ws)
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class WebSocket(BaseWebSocket):
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"""Websockets WebSocket Wrapper"""
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@override
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def __init__(self, *, request: Request, websocket: WebSocketClientProtocol):
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super().__init__(request=request)
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self.websocket = websocket
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@property
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@override
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def closed(self) -> bool:
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return self.websocket.closed
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@override
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async def accept(self):
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raise NotImplementedError
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@override
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async def close(self, code: int = 1000, reason: str = ""):
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await self.websocket.close(code, reason)
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@override
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@catch_closed
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async def receive(self) -> Union[str, bytes]:
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return await self.websocket.recv()
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@override
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@catch_closed
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async def receive_text(self) -> str:
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msg = await self.websocket.recv()
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if isinstance(msg, bytes):
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raise TypeError("WebSocket received unexpected frame type: bytes")
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return msg
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@override
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@catch_closed
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async def receive_bytes(self) -> bytes:
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msg = await self.websocket.recv()
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if isinstance(msg, str):
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raise TypeError("WebSocket received unexpected frame type: str")
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return msg
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@override
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async def send_text(self, data: str) -> None:
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await self.websocket.send(data)
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@override
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async def send_bytes(self, data: bytes) -> None:
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await self.websocket.send(data)
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Driver: Type[ForwardDriver] = combine_driver(NoneDriver, Mixin) # type: ignore
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"""Websockets Driver"""
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