627 lines
18 KiB
Python
627 lines
18 KiB
Python
import inspect
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import logging
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import operator
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import re
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import string
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import sys
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import typing
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import typing as t
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from datetime import date
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from datetime import datetime
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from datetime import timezone
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from itertools import chain
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from weakref import WeakKeyDictionary
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if t.TYPE_CHECKING:
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from _typeshed.wsgi import StartResponse
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from _typeshed.wsgi import WSGIApplication
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from _typeshed.wsgi import WSGIEnvironment
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from .wrappers.request import Request # noqa: F401
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_logger: t.Optional[logging.Logger] = None
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_signature_cache = WeakKeyDictionary() # type: ignore
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_epoch_ord = date(1970, 1, 1).toordinal()
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_legal_cookie_chars = frozenset(
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c.encode("ascii")
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for c in f"{string.ascii_letters}{string.digits}/=!#$%&'*+-.^_`|~:"
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)
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_cookie_quoting_map = {b",": b"\\054", b";": b"\\073", b'"': b'\\"', b"\\": b"\\\\"}
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for _i in chain(range(32), range(127, 256)):
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_cookie_quoting_map[_i.to_bytes(1, sys.byteorder)] = f"\\{_i:03o}".encode("latin1")
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_octal_re = re.compile(br"\\[0-3][0-7][0-7]")
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_quote_re = re.compile(br"[\\].")
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_legal_cookie_chars_re = br"[\w\d!#%&\'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\=]"
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_cookie_re = re.compile(
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br"""
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(?P<key>[^=;]+)
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(?:\s*=\s*
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(?P<val>
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"(?:[^\\"]|\\.)*" |
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(?:.*?)
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)
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)?
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\s*;
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""",
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flags=re.VERBOSE,
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)
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class _Missing:
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def __repr__(self) -> str:
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return "no value"
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def __reduce__(self) -> str:
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return "_missing"
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_missing = _Missing()
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@typing.overload
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def _make_encode_wrapper(reference: str) -> t.Callable[[str], str]:
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...
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@typing.overload
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def _make_encode_wrapper(reference: bytes) -> t.Callable[[str], bytes]:
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...
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def _make_encode_wrapper(reference: t.AnyStr) -> t.Callable[[str], t.AnyStr]:
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"""Create a function that will be called with a string argument. If
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the reference is bytes, values will be encoded to bytes.
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"""
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if isinstance(reference, str):
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return lambda x: x
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return operator.methodcaller("encode", "latin1")
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def _check_str_tuple(value: t.Tuple[t.AnyStr, ...]) -> None:
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"""Ensure tuple items are all strings or all bytes."""
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if not value:
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return
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item_type = str if isinstance(value[0], str) else bytes
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if any(not isinstance(item, item_type) for item in value):
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raise TypeError(f"Cannot mix str and bytes arguments (got {value!r})")
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_default_encoding = sys.getdefaultencoding()
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def _to_bytes(
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x: t.Union[str, bytes], charset: str = _default_encoding, errors: str = "strict"
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) -> bytes:
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if x is None or isinstance(x, bytes):
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return x
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if isinstance(x, (bytearray, memoryview)):
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return bytes(x)
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if isinstance(x, str):
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return x.encode(charset, errors)
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raise TypeError("Expected bytes")
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@typing.overload
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def _to_str( # type: ignore
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x: None,
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charset: t.Optional[str] = ...,
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errors: str = ...,
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allow_none_charset: bool = ...,
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) -> None:
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...
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@typing.overload
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def _to_str(
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x: t.Any,
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charset: t.Optional[str] = ...,
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errors: str = ...,
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allow_none_charset: bool = ...,
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) -> str:
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...
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def _to_str(
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x: t.Optional[t.Any],
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charset: t.Optional[str] = _default_encoding,
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errors: str = "strict",
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allow_none_charset: bool = False,
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) -> t.Optional[t.Union[str, bytes]]:
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if x is None or isinstance(x, str):
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return x
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if not isinstance(x, (bytes, bytearray)):
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return str(x)
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if charset is None:
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if allow_none_charset:
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return x
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return x.decode(charset, errors) # type: ignore
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def _wsgi_decoding_dance(
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s: str, charset: str = "utf-8", errors: str = "replace"
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) -> str:
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return s.encode("latin1").decode(charset, errors)
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def _wsgi_encoding_dance(
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s: str, charset: str = "utf-8", errors: str = "replace"
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) -> str:
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if isinstance(s, bytes):
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return s.decode("latin1", errors)
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return s.encode(charset).decode("latin1", errors)
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def _get_environ(obj: t.Union["WSGIEnvironment", "Request"]) -> "WSGIEnvironment":
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env = getattr(obj, "environ", obj)
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assert isinstance(
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env, dict
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), f"{type(obj).__name__!r} is not a WSGI environment (has to be a dict)"
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return env
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def _has_level_handler(logger: logging.Logger) -> bool:
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"""Check if there is a handler in the logging chain that will handle
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the given logger's effective level.
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"""
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level = logger.getEffectiveLevel()
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current = logger
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while current:
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if any(handler.level <= level for handler in current.handlers):
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return True
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if not current.propagate:
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break
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current = current.parent # type: ignore
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return False
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class _ColorStreamHandler(logging.StreamHandler):
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"""On Windows, wrap stream with Colorama for ANSI style support."""
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def __init__(self) -> None:
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try:
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import colorama
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except ImportError:
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stream = None
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else:
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stream = colorama.AnsiToWin32(sys.stderr)
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super().__init__(stream)
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def _log(type: str, message: str, *args: t.Any, **kwargs: t.Any) -> None:
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"""Log a message to the 'werkzeug' logger.
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The logger is created the first time it is needed. If there is no
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level set, it is set to :data:`logging.INFO`. If there is no handler
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for the logger's effective level, a :class:`logging.StreamHandler`
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is added.
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"""
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global _logger
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if _logger is None:
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_logger = logging.getLogger("werkzeug")
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if _logger.level == logging.NOTSET:
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_logger.setLevel(logging.INFO)
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if not _has_level_handler(_logger):
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_logger.addHandler(_ColorStreamHandler())
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getattr(_logger, type)(message.rstrip(), *args, **kwargs)
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def _parse_signature(func): # type: ignore
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"""Return a signature object for the function.
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.. deprecated:: 2.0
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Will be removed in Werkzeug 2.1 along with ``utils.bind`` and
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``validate_arguments``.
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"""
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# if we have a cached validator for this function, return it
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parse = _signature_cache.get(func)
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if parse is not None:
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return parse
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# inspect the function signature and collect all the information
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tup = inspect.getfullargspec(func)
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positional, vararg_var, kwarg_var, defaults = tup[:4]
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defaults = defaults or ()
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arg_count = len(positional)
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arguments = []
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for idx, name in enumerate(positional):
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if isinstance(name, list):
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raise TypeError(
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"cannot parse functions that unpack tuples in the function signature"
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)
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try:
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default = defaults[idx - arg_count]
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except IndexError:
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param = (name, False, None)
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else:
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param = (name, True, default)
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arguments.append(param)
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arguments = tuple(arguments)
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def parse(args, kwargs): # type: ignore
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new_args = []
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missing = []
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extra = {}
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# consume as many arguments as positional as possible
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for idx, (name, has_default, default) in enumerate(arguments):
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try:
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new_args.append(args[idx])
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except IndexError:
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try:
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new_args.append(kwargs.pop(name))
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except KeyError:
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if has_default:
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new_args.append(default)
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else:
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missing.append(name)
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else:
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if name in kwargs:
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extra[name] = kwargs.pop(name)
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# handle extra arguments
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extra_positional = args[arg_count:]
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if vararg_var is not None:
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new_args.extend(extra_positional)
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extra_positional = ()
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if kwargs and kwarg_var is None:
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extra.update(kwargs)
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kwargs = {}
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return (
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new_args,
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kwargs,
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missing,
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extra,
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extra_positional,
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arguments,
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vararg_var,
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kwarg_var,
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)
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_signature_cache[func] = parse
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return parse
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@typing.overload
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def _dt_as_utc(dt: None) -> None:
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...
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@typing.overload
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def _dt_as_utc(dt: datetime) -> datetime:
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...
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def _dt_as_utc(dt: t.Optional[datetime]) -> t.Optional[datetime]:
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if dt is None:
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return dt
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if dt.tzinfo is None:
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return dt.replace(tzinfo=timezone.utc)
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elif dt.tzinfo != timezone.utc:
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return dt.astimezone(timezone.utc)
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return dt
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_TAccessorValue = t.TypeVar("_TAccessorValue")
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class _DictAccessorProperty(t.Generic[_TAccessorValue]):
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"""Baseclass for `environ_property` and `header_property`."""
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read_only = False
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def __init__(
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self,
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name: str,
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default: t.Optional[_TAccessorValue] = None,
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load_func: t.Optional[t.Callable[[str], _TAccessorValue]] = None,
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dump_func: t.Optional[t.Callable[[_TAccessorValue], str]] = None,
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read_only: t.Optional[bool] = None,
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doc: t.Optional[str] = None,
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) -> None:
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self.name = name
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self.default = default
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self.load_func = load_func
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self.dump_func = dump_func
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if read_only is not None:
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self.read_only = read_only
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self.__doc__ = doc
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def lookup(self, instance: t.Any) -> t.MutableMapping[str, t.Any]:
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raise NotImplementedError
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@typing.overload
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def __get__(
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self, instance: None, owner: type
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) -> "_DictAccessorProperty[_TAccessorValue]":
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...
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@typing.overload
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def __get__(self, instance: t.Any, owner: type) -> _TAccessorValue:
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...
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def __get__(
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self, instance: t.Optional[t.Any], owner: type
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) -> t.Union[_TAccessorValue, "_DictAccessorProperty[_TAccessorValue]"]:
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if instance is None:
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return self
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storage = self.lookup(instance)
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if self.name not in storage:
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return self.default # type: ignore
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value = storage[self.name]
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if self.load_func is not None:
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try:
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return self.load_func(value)
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except (ValueError, TypeError):
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return self.default # type: ignore
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return value # type: ignore
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def __set__(self, instance: t.Any, value: _TAccessorValue) -> None:
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if self.read_only:
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raise AttributeError("read only property")
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if self.dump_func is not None:
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self.lookup(instance)[self.name] = self.dump_func(value)
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else:
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self.lookup(instance)[self.name] = value
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def __delete__(self, instance: t.Any) -> None:
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if self.read_only:
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raise AttributeError("read only property")
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self.lookup(instance).pop(self.name, None)
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def __repr__(self) -> str:
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return f"<{type(self).__name__} {self.name}>"
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def _cookie_quote(b: bytes) -> bytes:
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buf = bytearray()
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all_legal = True
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_lookup = _cookie_quoting_map.get
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_push = buf.extend
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for char_int in b:
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char = char_int.to_bytes(1, sys.byteorder)
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if char not in _legal_cookie_chars:
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all_legal = False
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char = _lookup(char, char)
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_push(char)
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if all_legal:
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return bytes(buf)
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return bytes(b'"' + buf + b'"')
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def _cookie_unquote(b: bytes) -> bytes:
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if len(b) < 2:
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return b
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if b[:1] != b'"' or b[-1:] != b'"':
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return b
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b = b[1:-1]
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i = 0
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n = len(b)
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rv = bytearray()
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_push = rv.extend
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while 0 <= i < n:
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o_match = _octal_re.search(b, i)
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q_match = _quote_re.search(b, i)
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if not o_match and not q_match:
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rv.extend(b[i:])
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break
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j = k = -1
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if o_match:
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j = o_match.start(0)
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if q_match:
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k = q_match.start(0)
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if q_match and (not o_match or k < j):
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_push(b[i:k])
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_push(b[k + 1 : k + 2])
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i = k + 2
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else:
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_push(b[i:j])
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rv.append(int(b[j + 1 : j + 4], 8))
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i = j + 4
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return bytes(rv)
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def _cookie_parse_impl(b: bytes) -> t.Iterator[t.Tuple[bytes, bytes]]:
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"""Lowlevel cookie parsing facility that operates on bytes."""
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i = 0
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n = len(b)
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while i < n:
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match = _cookie_re.search(b + b";", i)
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if not match:
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break
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key = match.group("key").strip()
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value = match.group("val") or b""
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i = match.end(0)
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yield key, _cookie_unquote(value)
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def _encode_idna(domain: str) -> bytes:
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# If we're given bytes, make sure they fit into ASCII
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if isinstance(domain, bytes):
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domain.decode("ascii")
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return domain
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# Otherwise check if it's already ascii, then return
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try:
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return domain.encode("ascii")
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except UnicodeError:
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pass
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# Otherwise encode each part separately
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return b".".join(p.encode("idna") for p in domain.split("."))
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def _decode_idna(domain: t.Union[str, bytes]) -> str:
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# If the input is a string try to encode it to ascii to do the idna
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# decoding. If that fails because of a unicode error, then we
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# already have a decoded idna domain.
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if isinstance(domain, str):
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try:
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domain = domain.encode("ascii")
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except UnicodeError:
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return domain # type: ignore
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# Decode each part separately. If a part fails, try to decode it
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# with ascii and silently ignore errors. This makes sense because
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# the idna codec does not have error handling.
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def decode_part(part: bytes) -> str:
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try:
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return part.decode("idna")
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except UnicodeError:
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return part.decode("ascii", "ignore")
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return ".".join(decode_part(p) for p in domain.split(b"."))
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@typing.overload
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def _make_cookie_domain(domain: None) -> None:
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...
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|
|
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@typing.overload
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def _make_cookie_domain(domain: str) -> bytes:
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...
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|
|
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def _make_cookie_domain(domain: t.Optional[str]) -> t.Optional[bytes]:
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if domain is None:
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return None
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domain = _encode_idna(domain)
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if b":" in domain:
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domain = domain.split(b":", 1)[0]
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if b"." in domain:
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return domain
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raise ValueError(
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"Setting 'domain' for a cookie on a server running locally (ex: "
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"localhost) is not supported by complying browsers. You should "
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"have something like: '127.0.0.1 localhost dev.localhost' on "
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"your hosts file and then point your server to run on "
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"'dev.localhost' and also set 'domain' for 'dev.localhost'"
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)
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def _easteregg(app: t.Optional["WSGIApplication"] = None) -> "WSGIApplication":
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"""Like the name says. But who knows how it works?"""
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def bzzzzzzz(gyver: bytes) -> str:
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import base64
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import zlib
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return zlib.decompress(base64.b64decode(gyver)).decode("ascii")
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gyver = "\n".join(
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[
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x + (77 - len(x)) * " "
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for x in bzzzzzzz(
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b"""
|
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eJyFlzuOJDkMRP06xRjymKgDJCDQStBYT8BCgK4gTwfQ2fcFs2a2FzvZk+hvlcRvRJD148efHt9m
|
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9Xz94dRY5hGt1nrYcXx7us9qlcP9HHNh28rz8dZj+q4rynVFFPdlY4zH873NKCexrDM6zxxRymzz
|
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4QIxzK4bth1PV7+uHn6WXZ5C4ka/+prFzx3zWLMHAVZb8RRUxtFXI5DTQ2n3Hi2sNI+HK43AOWSY
|
|
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sR0AVVHuGuMOIfbuQ/OKBkGRC6NJ4u7sbPX8bG/n5sNIOQ6/Y/BX3IwRlTSabtZpYLB85lYtkkgm
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p1qXK3Du2mnr5INXmT/78KI12n11EFBkJHHp0wJyLe9MvPNUGYsf+170maayRoy2lURGHAIapSpQ
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krEDuNoJCHNlZYhKpvw4mspVWxqo415n8cD62N9+EfHrAvqQnINStetek7RY2Urv8nxsnGaZfRr/
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|
nhXbJ6m/yl1LzYqscDZA9QHLNbdaSTTr+kFg3bC0iYbX/eQy0Bv3h4B50/SGYzKAXkCeOLI3bcAt
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|
mj2Z/FM1vQWgDynsRwNvrWnJHlespkrp8+vO1jNaibm+PhqXPPv30YwDZ6jApe3wUjFQobghvW9p
|
|
7f2zLkGNv8b191cD/3vs9Q833z8t"""
|
|
).splitlines()
|
|
]
|
|
)
|
|
|
|
def easteregged(
|
|
environ: "WSGIEnvironment", start_response: "StartResponse"
|
|
) -> t.Iterable[bytes]:
|
|
def injecting_start_response(
|
|
status: str, headers: t.List[t.Tuple[str, str]], exc_info: t.Any = None
|
|
) -> t.Callable[[bytes], t.Any]:
|
|
headers.append(("X-Powered-By", "Werkzeug"))
|
|
return start_response(status, headers, exc_info)
|
|
|
|
if app is not None and environ.get("QUERY_STRING") != "macgybarchakku":
|
|
return app(environ, injecting_start_response)
|
|
injecting_start_response("200 OK", [("Content-Type", "text/html")])
|
|
return [
|
|
f"""\
|
|
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<title>About Werkzeug</title>
|
|
<style type="text/css">
|
|
body {{ font: 15px Georgia, serif; text-align: center; }}
|
|
a {{ color: #333; text-decoration: none; }}
|
|
h1 {{ font-size: 30px; margin: 20px 0 10px 0; }}
|
|
p {{ margin: 0 0 30px 0; }}
|
|
pre {{ font: 11px 'Consolas', 'Monaco', monospace; line-height: 0.95; }}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<h1><a href="http://werkzeug.pocoo.org/">Werkzeug</a></h1>
|
|
<p>the Swiss Army knife of Python web development.</p>
|
|
<pre>{gyver}\n\n\n</pre>
|
|
</body>
|
|
</html>""".encode(
|
|
"latin1"
|
|
)
|
|
]
|
|
|
|
return easteregged
|