mirror of
https://github.com/nonebot/nonebot2.git
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309 lines
9.5 KiB
Python
309 lines
9.5 KiB
Python
"""[FastAPI](https://fastapi.tiangolo.com/) 驱动适配
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```bash
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nb driver install fastapi
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# 或者
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pip install nonebot2[fastapi]
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```
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:::tip 提示
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本驱动仅支持服务端连接
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:::
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FrontMatter:
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sidebar_position: 1
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description: nonebot.drivers.fastapi 模块
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"""
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import logging
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import contextlib
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from functools import wraps
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from typing_extensions import override
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from typing import Any, Union, Optional
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from pydantic import BaseModel
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from nonebot.config import Env
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from nonebot.drivers import ASGIMixin
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from nonebot.exception import WebSocketClosed
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from nonebot.internal.driver import FileTypes
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from nonebot.drivers import Driver as BaseDriver
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from nonebot.config import Config as NoneBotConfig
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from nonebot.drivers import Request as BaseRequest
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from nonebot.drivers import WebSocket as BaseWebSocket
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from nonebot.compat import model_dump, type_validate_python
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from nonebot.drivers import HTTPServerSetup, WebSocketServerSetup
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try:
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import uvicorn
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from fastapi.responses import Response
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from fastapi import FastAPI, Request, UploadFile, status
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from starlette.websockets import WebSocket, WebSocketState, WebSocketDisconnect
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except ModuleNotFoundError as e: # pragma: no cover
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raise ImportError(
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"Please install FastAPI first to use this driver. "
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"Install with pip: `pip install nonebot2[fastapi]`"
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) from e
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def catch_closed(func):
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@wraps(func)
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async def decorator(*args, **kwargs):
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try:
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return await func(*args, **kwargs)
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except WebSocketDisconnect as e:
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raise WebSocketClosed(e.code)
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except KeyError:
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raise TypeError("WebSocket received unexpected frame type")
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return decorator
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class Config(BaseModel):
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"""FastAPI 驱动框架设置，详情参考 FastAPI 文档"""
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fastapi_openapi_url: Optional[str] = None
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"""`openapi.json` 地址，默认为 `None` 即关闭"""
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fastapi_docs_url: Optional[str] = None
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"""`swagger` 地址，默认为 `None` 即关闭"""
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fastapi_redoc_url: Optional[str] = None
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"""`redoc` 地址，默认为 `None` 即关闭"""
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fastapi_include_adapter_schema: bool = True
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"""是否包含适配器路由的 schema，默认为 `True`"""
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fastapi_reload: bool = False
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"""开启/关闭冷重载"""
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fastapi_reload_dirs: Optional[list[str]] = None
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"""重载监控文件夹列表，默认为 uvicorn 默认值"""
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fastapi_reload_delay: float = 0.25
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"""重载延迟，默认为 uvicorn 默认值"""
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fastapi_reload_includes: Optional[list[str]] = None
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"""要监听的文件列表，支持 glob pattern，默认为 uvicorn 默认值"""
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fastapi_reload_excludes: Optional[list[str]] = None
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"""不要监听的文件列表，支持 glob pattern，默认为 uvicorn 默认值"""
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fastapi_extra: dict[str, Any] = {}
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"""传递给 `FastAPI` 的其他参数。"""
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class Driver(BaseDriver, ASGIMixin):
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"""FastAPI 驱动框架。"""
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def __init__(self, env: Env, config: NoneBotConfig):
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super().__init__(env, config)
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self.fastapi_config: Config = type_validate_python(Config, model_dump(config))
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self._server_app = FastAPI(
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lifespan=self._lifespan_manager,
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openapi_url=self.fastapi_config.fastapi_openapi_url,
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docs_url=self.fastapi_config.fastapi_docs_url,
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redoc_url=self.fastapi_config.fastapi_redoc_url,
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**self.fastapi_config.fastapi_extra,
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)
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@property
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@override
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def type(self) -> str:
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"""驱动名称: `fastapi`"""
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return "fastapi"
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@property
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@override
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def server_app(self) -> FastAPI:
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"""`FastAPI APP` 对象"""
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return self._server_app
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@property
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@override
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def asgi(self) -> FastAPI:
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"""`FastAPI APP` 对象"""
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return self._server_app
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@property
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@override
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def logger(self) -> logging.Logger:
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"""fastapi 使用的 logger"""
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return logging.getLogger("fastapi")
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@override
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def setup_http_server(self, setup: HTTPServerSetup):
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async def _handle(request: Request) -> Response:
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return await self._handle_http(request, setup)
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self._server_app.add_api_route(
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setup.path.path,
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_handle,
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name=setup.name,
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methods=[setup.method],
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include_in_schema=self.fastapi_config.fastapi_include_adapter_schema,
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)
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@override
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def setup_websocket_server(self, setup: WebSocketServerSetup) -> None:
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async def _handle(websocket: WebSocket) -> None:
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await self._handle_ws(websocket, setup)
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self._server_app.add_api_websocket_route(
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setup.path.path,
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_handle,
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name=setup.name,
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)
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@contextlib.asynccontextmanager
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async def _lifespan_manager(self, app: FastAPI):
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await self._lifespan.startup()
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try:
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yield
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finally:
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await self._lifespan.shutdown()
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@override
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def run(
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self,
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host: Optional[str] = None,
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port: Optional[int] = None,
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*args,
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app: Optional[str] = None,
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**kwargs,
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):
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"""使用 `uvicorn` 启动 FastAPI"""
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super().run(host, port, app=app, **kwargs)
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LOGGING_CONFIG = {
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"version": 1,
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"disable_existing_loggers": False,
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"handlers": {
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"default": {
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"class": "nonebot.log.LoguruHandler",
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},
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},
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"loggers": {
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"uvicorn.error": {"handlers": ["default"], "level": "INFO"},
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"uvicorn.access": {
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"handlers": ["default"],
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"level": "INFO",
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},
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},
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}
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uvicorn.run(
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app or self.server_app, # type: ignore
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host=host or str(self.config.host),
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port=port or self.config.port,
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reload=self.fastapi_config.fastapi_reload,
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reload_dirs=self.fastapi_config.fastapi_reload_dirs,
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reload_delay=self.fastapi_config.fastapi_reload_delay,
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reload_includes=self.fastapi_config.fastapi_reload_includes,
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reload_excludes=self.fastapi_config.fastapi_reload_excludes,
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log_config=LOGGING_CONFIG,
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**kwargs,
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)
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async def _handle_http(
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self,
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request: Request,
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setup: HTTPServerSetup,
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) -> Response:
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json: Any = None
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with contextlib.suppress(Exception):
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json = await request.json()
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data: Optional[dict] = None
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files: Optional[list[tuple[str, FileTypes]]] = None
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with contextlib.suppress(Exception):
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form = await request.form()
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data = {}
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files = []
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for key, value in form.multi_items():
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if isinstance(value, UploadFile):
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files.append(
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(key, (value.filename, value.file, value.content_type))
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)
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else:
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data[key] = value
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http_request = BaseRequest(
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request.method,
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str(request.url),
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headers=request.headers.items(),
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cookies=request.cookies,
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content=await request.body(),
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data=data,
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json=json,
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files=files,
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version=request.scope["http_version"],
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)
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response = await setup.handle_func(http_request)
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return Response(
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response.content, response.status_code, dict(response.headers.items())
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)
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async def _handle_ws(self, websocket: WebSocket, setup: WebSocketServerSetup):
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request = BaseRequest(
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"GET",
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str(websocket.url),
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headers=websocket.headers.items(),
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cookies=websocket.cookies,
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version=websocket.scope.get("http_version", "1.1"),
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)
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ws = FastAPIWebSocket(
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request=request,
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websocket=websocket,
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)
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await setup.handle_func(ws)
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class FastAPIWebSocket(BaseWebSocket):
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"""FastAPI WebSocket Wrapper"""
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@override
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def __init__(self, *, request: BaseRequest, websocket: WebSocket):
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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 (
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self.websocket.client_state == WebSocketState.DISCONNECTED
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or self.websocket.application_state == WebSocketState.DISCONNECTED
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)
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@override
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async def accept(self) -> None:
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await self.websocket.accept()
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@override
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async def close(
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self, code: int = status.WS_1000_NORMAL_CLOSURE, reason: str = ""
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) -> None:
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await self.websocket.close(code, reason)
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@override
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async def receive(self) -> Union[str, bytes]:
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# assert self.websocket.application_state == WebSocketState.CONNECTED
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msg = await self.websocket.receive()
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if msg["type"] == "websocket.disconnect":
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raise WebSocketClosed(msg["code"])
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return msg["text"] if "text" in msg else msg["bytes"]
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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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return await self.websocket.receive_text()
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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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return await self.websocket.receive_bytes()
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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({"type": "websocket.send", "text": 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({"type": "websocket.send", "bytes": data})
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__autodoc__ = {"catch_closed": False}
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