--- /dev/null
+# Types to support PEP 3333 (WSGI)
+#
+# See the README.md file in this directory for more information.
+
+from sys import _OptExcInfo
+from typing import Any, Callable, Dict, Iterable, Protocol
+
+# stable
+class StartResponse(Protocol):
+ def __call__(
+ self, status: str, headers: list[tuple[str, str]], exc_info: _OptExcInfo | None = ...
+ ) -> Callable[[bytes], Any]: ...
+
+WSGIEnvironment = Dict[str, Any] # stable
+WSGIApplication = Callable[[WSGIEnvironment, StartResponse], Iterable[bytes]] # stable
+
+# WSGI input streams per PEP 3333, stable
+class InputStream(Protocol):
+ def read(self, size: int = ...) -> bytes: ...
+ def readline(self, size: int = ...) -> bytes: ...
+ def readlines(self, hint: int = ...) -> list[bytes]: ...
+ def __iter__(self) -> Iterable[bytes]: ...
+
+# WSGI error streams per PEP 3333, stable
+class ErrorStream(Protocol):
+ def flush(self) -> None: ...
+ def write(self, s: str) -> None: ...
+ def writelines(self, seq: list[str]) -> None: ...
+
+class _Readable(Protocol):
+ def read(self, size: int = ...) -> bytes: ...
+
+# Optional file wrapper in wsgi.file_wrapper
+class FileWrapper(Protocol):
+ def __call__(self, file: _Readable, block_size: int = ...) -> Iterable[bytes]: ...