⚡ - sauvegarde automatique de l'avancement du livre

venv/lib/python3.11/site-packages/werkzeug/_internal.py

@@ -0,0 +1,211 @@
+from __future__ import annotations
+
+import logging
+import re
+import sys
+import typing as t
+from datetime import datetime
+from datetime import timezone
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIEnvironment
+
+    from .wrappers.request import Request
+
+_logger: logging.Logger | None = None
+
+
+class _Missing:
+    def __repr__(self) -> str:
+        return "no value"
+
+    def __reduce__(self) -> str:
+        return "_missing"
+
+
+_missing = _Missing()
+
+
+def _wsgi_decoding_dance(s: str) -> str:
+    return s.encode("latin1").decode(errors="replace")
+
+
+def _wsgi_encoding_dance(s: str) -> str:
+    return s.encode().decode("latin1")
+
+
+def _get_environ(obj: WSGIEnvironment | Request) -> WSGIEnvironment:
+    env = getattr(obj, "environ", obj)
+    assert isinstance(
+        env, dict
+    ), f"{type(obj).__name__!r} is not a WSGI environment (has to be a dict)"
+    return env
+
+
+def _has_level_handler(logger: logging.Logger) -> bool:
+    """Check if there is a handler in the logging chain that will handle
+    the given logger's effective level.
+    """
+    level = logger.getEffectiveLevel()
+    current = logger
+
+    while current:
+        if any(handler.level <= level for handler in current.handlers):
+            return True
+
+        if not current.propagate:
+            break
+
+        current = current.parent  # type: ignore
+
+    return False
+
+
+class _ColorStreamHandler(logging.StreamHandler):  # type: ignore[type-arg]
+    """On Windows, wrap stream with Colorama for ANSI style support."""
+
+    def __init__(self) -> None:
+        try:
+            import colorama
+        except ImportError:
+            stream = None
+        else:
+            stream = colorama.AnsiToWin32(sys.stderr)
+
+        super().__init__(stream)
+
+
+def _log(type: str, message: str, *args: t.Any, **kwargs: t.Any) -> None:
+    """Log a message to the 'werkzeug' logger.
+
+    The logger is created the first time it is needed. If there is no
+    level set, it is set to :data:`logging.INFO`. If there is no handler
+    for the logger's effective level, a :class:`logging.StreamHandler`
+    is added.
+    """
+    global _logger
+
+    if _logger is None:
+        _logger = logging.getLogger("werkzeug")
+
+        if _logger.level == logging.NOTSET:
+            _logger.setLevel(logging.INFO)
+
+        if not _has_level_handler(_logger):
+            _logger.addHandler(_ColorStreamHandler())
+
+    getattr(_logger, type)(message.rstrip(), *args, **kwargs)
+
+
+@t.overload
+def _dt_as_utc(dt: None) -> None: ...
+
+
+@t.overload
+def _dt_as_utc(dt: datetime) -> datetime: ...
+
+
+def _dt_as_utc(dt: datetime | None) -> datetime | None:
+    if dt is None:
+        return dt
+
+    if dt.tzinfo is None:
+        return dt.replace(tzinfo=timezone.utc)
+    elif dt.tzinfo != timezone.utc:
+        return dt.astimezone(timezone.utc)
+
+    return dt
+
+
+_TAccessorValue = t.TypeVar("_TAccessorValue")
+
+
+class _DictAccessorProperty(t.Generic[_TAccessorValue]):
+    """Baseclass for `environ_property` and `header_property`."""
+
+    read_only = False
+
+    def __init__(
+        self,
+        name: str,
+        default: _TAccessorValue | None = None,
+        load_func: t.Callable[[str], _TAccessorValue] | None = None,
+        dump_func: t.Callable[[_TAccessorValue], str] | None = None,
+        read_only: bool | None = None,
+        doc: str | None = None,
+    ) -> None:
+        self.name = name
+        self.default = default
+        self.load_func = load_func
+        self.dump_func = dump_func
+        if read_only is not None:
+            self.read_only = read_only
+        self.__doc__ = doc
+
+    def lookup(self, instance: t.Any) -> t.MutableMapping[str, t.Any]:
+        raise NotImplementedError
+
+    @t.overload
+    def __get__(
+        self, instance: None, owner: type
+    ) -> _DictAccessorProperty[_TAccessorValue]: ...
+
+    @t.overload
+    def __get__(self, instance: t.Any, owner: type) -> _TAccessorValue: ...
+
+    def __get__(
+        self, instance: t.Any | None, owner: type
+    ) -> _TAccessorValue | _DictAccessorProperty[_TAccessorValue]:
+        if instance is None:
+            return self
+
+        storage = self.lookup(instance)
+
+        if self.name not in storage:
+            return self.default  # type: ignore
+
+        value = storage[self.name]
+
+        if self.load_func is not None:
+            try:
+                return self.load_func(value)
+            except (ValueError, TypeError):
+                return self.default  # type: ignore
+
+        return value  # type: ignore
+
+    def __set__(self, instance: t.Any, value: _TAccessorValue) -> None:
+        if self.read_only:
+            raise AttributeError("read only property")
+
+        if self.dump_func is not None:
+            self.lookup(instance)[self.name] = self.dump_func(value)
+        else:
+            self.lookup(instance)[self.name] = value
+
+    def __delete__(self, instance: t.Any) -> None:
+        if self.read_only:
+            raise AttributeError("read only property")
+
+        self.lookup(instance).pop(self.name, None)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.name}>"
+
+
+_plain_int_re = re.compile(r"-?\d+", re.ASCII)
+
+
+def _plain_int(value: str) -> int:
+    """Parse an int only if it is only ASCII digits and ``-``.
+
+    This disallows ``+``, ``_``, and non-ASCII digits, which are accepted by ``int`` but
+    are not allowed in HTTP header values.
+
+    Any leading or trailing whitespace is stripped
+    """
+    value = value.strip()
+    if _plain_int_re.fullmatch(value) is None:
+        raise ValueError
+
+    return int(value)