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import sys
import typing
def bytes2str(bstr: bytes) -> str:
assert isinstance(bstr, bytes)
return bstr.decode("iso-8859-1") # always successful
def str2bytes(sstr: str) -> bytes:
assert isinstance(sstr, str)
return sstr.encode("iso-8859-1") # might fail, but spec says it doesn't
def textopen(filename: str, mode: str) -> typing.TextIO:
# We use the same encoding as for all wsgi strings here.
return open(filename, mode, encoding="iso-8859-1")
Environ = typing.Dict[str, typing.Any]
HeaderList = typing.List[typing.Tuple[str, str]]
if sys.version_info >= (3, 11):
OptExcInfo = typing.Optional[
typing.Tuple[type[BaseException], BaseException, typing.Any]
]
else:
OptExcInfo = typing.Optional[
typing.Tuple[typing.Any, BaseException, typing.Any]
]
WriteCallback = typing.Callable[[bytes], None]
if sys.version_info >= (3, 11):
class StartResponse(typing.Protocol):
def __call__(
self, status: str, headers: HeaderList, exc_info: OptExcInfo = None
) -> WriteCallback:
...
else:
StartResponse = typing.Callable[
[str, HeaderList, OptExcInfo], WriteCallback
]
WsgiApp = typing.Callable[[Environ, StartResponse], typing.Iterable[bytes]]
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