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- from __future__ import annotations
- from collections.abc import Awaitable, Callable, Iterator
- from typing import Any, ParamSpec, Protocol
- P = ParamSpec("P")
- _Scope = Any
- _Receive = Callable[[], Awaitable[Any]]
- _Send = Callable[[Any], Awaitable[None]]
- # Since `starlette.types.ASGIApp` type differs from `ASGIApplication` from `asgiref`
- # we need to define a more permissive version of ASGIApp that doesn't cause type errors.
- _ASGIApp = Callable[[_Scope, _Receive, _Send], Awaitable[None]]
- class _MiddlewareFactory(Protocol[P]):
- def __call__(self, app: _ASGIApp, /, *args: P.args, **kwargs: P.kwargs) -> _ASGIApp: ... # pragma: no cover
- class Middleware:
- def __init__(self, cls: _MiddlewareFactory[P], *args: P.args, **kwargs: P.kwargs) -> None:
- self.cls = cls
- self.args = args
- self.kwargs = kwargs
- def __iter__(self) -> Iterator[Any]:
- as_tuple = (self.cls, self.args, self.kwargs)
- return iter(as_tuple)
- def __repr__(self) -> str:
- class_name = self.__class__.__name__
- args_strings = [f"{value!r}" for value in self.args]
- option_strings = [f"{key}={value!r}" for key, value in self.kwargs.items()]
- name = getattr(self.cls, "__name__", "")
- args_repr = ", ".join([name] + args_strings + option_strings)
- return f"{class_name}({args_repr})"
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