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54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
"""WSGI-related types for static type checking"""
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from collections.abc import Callable, Iterable, Iterator
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from types import TracebackType
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from typing import Any, Protocol, TypeAlias
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__all__ = [
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"StartResponse",
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"WSGIEnvironment",
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"WSGIApplication",
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"InputStream",
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"ErrorStream",
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"FileWrapper",
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]
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_ExcInfo: TypeAlias = tuple[type[BaseException], BaseException, TracebackType]
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_OptExcInfo: TypeAlias = _ExcInfo | tuple[None, None, None]
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class StartResponse(Protocol):
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"""start_response() callable as defined in PEP 3333"""
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def __call__(
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self,
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status: str,
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headers: list[tuple[str, str]],
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exc_info: _OptExcInfo | None = ...,
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/,
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) -> Callable[[bytes], object]: ...
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WSGIEnvironment: TypeAlias = dict[str, Any]
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WSGIApplication: TypeAlias = Callable[[WSGIEnvironment, StartResponse],
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Iterable[bytes]]
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class InputStream(Protocol):
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"""WSGI input stream as defined in PEP 3333"""
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def read(self, size: int = ..., /) -> bytes: ...
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def readline(self, size: int = ..., /) -> bytes: ...
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def readlines(self, hint: int = ..., /) -> list[bytes]: ...
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def __iter__(self) -> Iterator[bytes]: ...
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class ErrorStream(Protocol):
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"""WSGI error stream as defined in PEP 3333"""
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def flush(self) -> object: ...
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def write(self, s: str, /) -> object: ...
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def writelines(self, seq: list[str], /) -> object: ...
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class _Readable(Protocol):
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def read(self, size: int = ..., /) -> bytes: ...
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# Optional: def close(self) -> object: ...
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class FileWrapper(Protocol):
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"""WSGI file wrapper as defined in PEP 3333"""
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def __call__(
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self, file: _Readable, block_size: int = ..., /,
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) -> Iterable[bytes]: ...
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