548 lines
20 KiB
Python
548 lines
20 KiB
Python
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import typing as t
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from datetime import datetime
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from .._internal import _to_str
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from ..datastructures import Accept
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from ..datastructures import Authorization
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from ..datastructures import CharsetAccept
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from ..datastructures import ETags
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from ..datastructures import Headers
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from ..datastructures import HeaderSet
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from ..datastructures import IfRange
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from ..datastructures import ImmutableList
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from ..datastructures import ImmutableMultiDict
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from ..datastructures import LanguageAccept
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from ..datastructures import MIMEAccept
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from ..datastructures import MultiDict
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from ..datastructures import Range
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from ..datastructures import RequestCacheControl
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from ..http import parse_accept_header
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from ..http import parse_authorization_header
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from ..http import parse_cache_control_header
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from ..http import parse_date
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from ..http import parse_etags
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from ..http import parse_if_range_header
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from ..http import parse_list_header
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from ..http import parse_options_header
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from ..http import parse_range_header
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from ..http import parse_set_header
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from ..urls import url_decode
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from ..user_agent import UserAgent
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from ..utils import cached_property
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from ..utils import header_property
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from .http import parse_cookie
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from .utils import get_current_url
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from .utils import get_host
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class Request:
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"""Represents the non-IO parts of a HTTP request, including the
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method, URL info, and headers.
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This class is not meant for general use. It should only be used when
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implementing WSGI, ASGI, or another HTTP application spec. Werkzeug
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provides a WSGI implementation at :cls:`werkzeug.wrappers.Request`.
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:param method: The method the request was made with, such as
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``GET``.
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:param scheme: The URL scheme of the protocol the request used, such
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as ``https`` or ``wss``.
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:param server: The address of the server. ``(host, port)``,
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``(path, None)`` for unix sockets, or ``None`` if not known.
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:param root_path: The prefix that the application is mounted under.
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This is prepended to generated URLs, but is not part of route
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matching.
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:param path: The path part of the URL after ``root_path``.
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:param query_string: The part of the URL after the "?".
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:param headers: The headers received with the request.
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:param remote_addr: The address of the client sending the request.
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.. versionadded:: 2.0
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"""
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#: The charset used to decode most data in the request.
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charset = "utf-8"
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#: the error handling procedure for errors, defaults to 'replace'
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encoding_errors = "replace"
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#: the class to use for `args` and `form`. The default is an
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#: :class:`~werkzeug.datastructures.ImmutableMultiDict` which supports
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#: multiple values per key. alternatively it makes sense to use an
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#: :class:`~werkzeug.datastructures.ImmutableOrderedMultiDict` which
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#: preserves order or a :class:`~werkzeug.datastructures.ImmutableDict`
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#: which is the fastest but only remembers the last key. It is also
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#: possible to use mutable structures, but this is not recommended.
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#:
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#: .. versionadded:: 0.6
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parameter_storage_class: t.Type[MultiDict] = ImmutableMultiDict
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#: The type to be used for dict values from the incoming WSGI
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#: environment. (For example for :attr:`cookies`.) By default an
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#: :class:`~werkzeug.datastructures.ImmutableMultiDict` is used.
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#:
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#: .. versionchanged:: 1.0.0
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#: Changed to ``ImmutableMultiDict`` to support multiple values.
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#:
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#: .. versionadded:: 0.6
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dict_storage_class: t.Type[MultiDict] = ImmutableMultiDict
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#: the type to be used for list values from the incoming WSGI environment.
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#: By default an :class:`~werkzeug.datastructures.ImmutableList` is used
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#: (for example for :attr:`access_list`).
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#:
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#: .. versionadded:: 0.6
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list_storage_class: t.Type[t.List] = ImmutableList
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user_agent_class: t.Type[UserAgent] = UserAgent
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"""The class used and returned by the :attr:`user_agent` property to
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parse the header. Defaults to
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:class:`~werkzeug.user_agent.UserAgent`, which does no parsing. An
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extension can provide a subclass that uses a parser to provide other
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data.
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.. versionadded:: 2.0
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"""
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#: Valid host names when handling requests. By default all hosts are
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#: trusted, which means that whatever the client says the host is
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#: will be accepted.
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#:
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#: Because ``Host`` and ``X-Forwarded-Host`` headers can be set to
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#: any value by a malicious client, it is recommended to either set
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#: this property or implement similar validation in the proxy (if
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#: the application is being run behind one).
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#:
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#: .. versionadded:: 0.9
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trusted_hosts: t.Optional[t.List[str]] = None
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def __init__(
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self,
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method: str,
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scheme: str,
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server: t.Optional[t.Tuple[str, t.Optional[int]]],
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root_path: str,
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path: str,
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query_string: bytes,
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headers: Headers,
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remote_addr: t.Optional[str],
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) -> None:
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#: The method the request was made with, such as ``GET``.
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self.method = method.upper()
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#: The URL scheme of the protocol the request used, such as
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#: ``https`` or ``wss``.
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self.scheme = scheme
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#: The address of the server. ``(host, port)``, ``(path, None)``
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#: for unix sockets, or ``None`` if not known.
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self.server = server
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#: The prefix that the application is mounted under, without a
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#: trailing slash. :attr:`path` comes after this.
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self.root_path = root_path.rstrip("/")
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#: The path part of the URL after :attr:`root_path`. This is the
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#: path used for routing within the application.
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self.path = "/" + path.lstrip("/")
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#: The part of the URL after the "?". This is the raw value, use
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#: :attr:`args` for the parsed values.
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self.query_string = query_string
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#: The headers received with the request.
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self.headers = headers
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#: The address of the client sending the request.
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self.remote_addr = remote_addr
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def __repr__(self) -> str:
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try:
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url = self.url
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except Exception as e:
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url = f"(invalid URL: {e})"
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return f"<{type(self).__name__} {url!r} [{self.method}]>"
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@property
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def url_charset(self) -> str:
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"""The charset that is assumed for URLs. Defaults to the value
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of :attr:`charset`.
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.. versionadded:: 0.6
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"""
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return self.charset
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@cached_property
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def args(self) -> "MultiDict[str, str]":
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"""The parsed URL parameters (the part in the URL after the question
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mark).
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By default an
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:class:`~werkzeug.datastructures.ImmutableMultiDict`
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is returned from this function. This can be changed by setting
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:attr:`parameter_storage_class` to a different type. This might
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be necessary if the order of the form data is important.
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"""
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return url_decode(
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self.query_string,
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self.url_charset,
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errors=self.encoding_errors,
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cls=self.parameter_storage_class,
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)
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@cached_property
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def access_route(self) -> t.List[str]:
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"""If a forwarded header exists this is a list of all ip addresses
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from the client ip to the last proxy server.
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"""
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if "X-Forwarded-For" in self.headers:
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return self.list_storage_class(
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parse_list_header(self.headers["X-Forwarded-For"])
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)
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elif self.remote_addr is not None:
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return self.list_storage_class([self.remote_addr])
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return self.list_storage_class()
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@cached_property
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def full_path(self) -> str:
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"""Requested path, including the query string."""
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return f"{self.path}?{_to_str(self.query_string, self.url_charset)}"
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@property
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def is_secure(self) -> bool:
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"""``True`` if the request was made with a secure protocol
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(HTTPS or WSS).
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"""
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return self.scheme in {"https", "wss"}
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@cached_property
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def url(self) -> str:
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"""The full request URL with the scheme, host, root path, path,
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and query string."""
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return get_current_url(
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self.scheme, self.host, self.root_path, self.path, self.query_string
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)
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@cached_property
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def base_url(self) -> str:
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"""Like :attr:`url` but without the query string."""
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return get_current_url(self.scheme, self.host, self.root_path, self.path)
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@cached_property
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def root_url(self) -> str:
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"""The request URL scheme, host, and root path. This is the root
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that the application is accessed from.
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"""
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return get_current_url(self.scheme, self.host, self.root_path)
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@cached_property
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def host_url(self) -> str:
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"""The request URL scheme and host only."""
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return get_current_url(self.scheme, self.host)
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@cached_property
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def host(self) -> str:
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"""The host name the request was made to, including the port if
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it's non-standard. Validated with :attr:`trusted_hosts`.
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"""
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return get_host(
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self.scheme, self.headers.get("host"), self.server, self.trusted_hosts
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)
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@cached_property
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def cookies(self) -> "ImmutableMultiDict[str, str]":
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"""A :class:`dict` with the contents of all cookies transmitted with
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the request."""
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wsgi_combined_cookie = ";".join(self.headers.getlist("Cookie"))
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return parse_cookie( # type: ignore
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wsgi_combined_cookie,
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self.charset,
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self.encoding_errors,
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cls=self.dict_storage_class,
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)
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# Common Descriptors
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content_type = header_property[str](
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"Content-Type",
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doc="""The Content-Type entity-header field indicates the media
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type of the entity-body sent to the recipient or, in the case of
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the HEAD method, the media type that would have been sent had
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the request been a GET.""",
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read_only=True,
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)
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@cached_property
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def content_length(self) -> t.Optional[int]:
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"""The Content-Length entity-header field indicates the size of the
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entity-body in bytes or, in the case of the HEAD method, the size of
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the entity-body that would have been sent had the request been a
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GET.
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"""
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if self.headers.get("Transfer-Encoding", "") == "chunked":
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return None
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content_length = self.headers.get("Content-Length")
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if content_length is not None:
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try:
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return max(0, int(content_length))
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except (ValueError, TypeError):
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pass
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return None
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content_encoding = header_property[str](
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"Content-Encoding",
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doc="""The Content-Encoding entity-header field is used as a
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modifier to the media-type. When present, its value indicates
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what additional content codings have been applied to the
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entity-body, and thus what decoding mechanisms must be applied
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in order to obtain the media-type referenced by the Content-Type
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header field.
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.. versionadded:: 0.9""",
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read_only=True,
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)
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content_md5 = header_property[str](
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"Content-MD5",
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doc="""The Content-MD5 entity-header field, as defined in
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RFC 1864, is an MD5 digest of the entity-body for the purpose of
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providing an end-to-end message integrity check (MIC) of the
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entity-body. (Note: a MIC is good for detecting accidental
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modification of the entity-body in transit, but is not proof
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against malicious attacks.)
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.. versionadded:: 0.9""",
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read_only=True,
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)
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referrer = header_property[str](
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"Referer",
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doc="""The Referer[sic] request-header field allows the client
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to specify, for the server's benefit, the address (URI) of the
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resource from which the Request-URI was obtained (the
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"referrer", although the header field is misspelled).""",
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read_only=True,
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)
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date = header_property(
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"Date",
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None,
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parse_date,
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doc="""The Date general-header field represents the date and
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time at which the message was originated, having the same
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semantics as orig-date in RFC 822.
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.. versionchanged:: 2.0
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The datetime object is timezone-aware.
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""",
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read_only=True,
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)
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max_forwards = header_property(
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"Max-Forwards",
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None,
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int,
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doc="""The Max-Forwards request-header field provides a
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mechanism with the TRACE and OPTIONS methods to limit the number
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of proxies or gateways that can forward the request to the next
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inbound server.""",
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read_only=True,
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)
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def _parse_content_type(self) -> None:
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if not hasattr(self, "_parsed_content_type"):
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self._parsed_content_type = parse_options_header(
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self.headers.get("Content-Type", "")
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)
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@property
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def mimetype(self) -> str:
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"""Like :attr:`content_type`, but without parameters (eg, without
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charset, type etc.) and always lowercase. For example if the content
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type is ``text/HTML; charset=utf-8`` the mimetype would be
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``'text/html'``.
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"""
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self._parse_content_type()
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return self._parsed_content_type[0].lower()
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@property
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def mimetype_params(self) -> t.Dict[str, str]:
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"""The mimetype parameters as dict. For example if the content
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type is ``text/html; charset=utf-8`` the params would be
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``{'charset': 'utf-8'}``.
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"""
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self._parse_content_type()
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return self._parsed_content_type[1]
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def pragma(self) -> HeaderSet:
|
||
|
|
"""The Pragma general-header field is used to include
|
||
|
|
implementation-specific directives that might apply to any recipient
|
||
|
|
along the request/response chain. All pragma directives specify
|
||
|
|
optional behavior from the viewpoint of the protocol; however, some
|
||
|
|
systems MAY require that behavior be consistent with the directives.
|
||
|
|
"""
|
||
|
|
return parse_set_header(self.headers.get("Pragma", ""))
|
||
|
|
|
||
|
|
# Accept
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def accept_mimetypes(self) -> MIMEAccept:
|
||
|
|
"""List of mimetypes this client supports as
|
||
|
|
:class:`~werkzeug.datastructures.MIMEAccept` object.
|
||
|
|
"""
|
||
|
|
return parse_accept_header(self.headers.get("Accept"), MIMEAccept)
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def accept_charsets(self) -> CharsetAccept:
|
||
|
|
"""List of charsets this client supports as
|
||
|
|
:class:`~werkzeug.datastructures.CharsetAccept` object.
|
||
|
|
"""
|
||
|
|
return parse_accept_header(self.headers.get("Accept-Charset"), CharsetAccept)
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def accept_encodings(self) -> Accept:
|
||
|
|
"""List of encodings this client accepts. Encodings in a HTTP term
|
||
|
|
are compression encodings such as gzip. For charsets have a look at
|
||
|
|
:attr:`accept_charset`.
|
||
|
|
"""
|
||
|
|
return parse_accept_header(self.headers.get("Accept-Encoding"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def accept_languages(self) -> LanguageAccept:
|
||
|
|
"""List of languages this client accepts as
|
||
|
|
:class:`~werkzeug.datastructures.LanguageAccept` object.
|
||
|
|
|
||
|
|
.. versionchanged 0.5
|
||
|
|
In previous versions this was a regular
|
||
|
|
:class:`~werkzeug.datastructures.Accept` object.
|
||
|
|
"""
|
||
|
|
return parse_accept_header(self.headers.get("Accept-Language"), LanguageAccept)
|
||
|
|
|
||
|
|
# ETag
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def cache_control(self) -> RequestCacheControl:
|
||
|
|
"""A :class:`~werkzeug.datastructures.RequestCacheControl` object
|
||
|
|
for the incoming cache control headers.
|
||
|
|
"""
|
||
|
|
cache_control = self.headers.get("Cache-Control")
|
||
|
|
return parse_cache_control_header(cache_control, None, RequestCacheControl)
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def if_match(self) -> ETags:
|
||
|
|
"""An object containing all the etags in the `If-Match` header.
|
||
|
|
|
||
|
|
:rtype: :class:`~werkzeug.datastructures.ETags`
|
||
|
|
"""
|
||
|
|
return parse_etags(self.headers.get("If-Match"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def if_none_match(self) -> ETags:
|
||
|
|
"""An object containing all the etags in the `If-None-Match` header.
|
||
|
|
|
||
|
|
:rtype: :class:`~werkzeug.datastructures.ETags`
|
||
|
|
"""
|
||
|
|
return parse_etags(self.headers.get("If-None-Match"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def if_modified_since(self) -> t.Optional[datetime]:
|
||
|
|
"""The parsed `If-Modified-Since` header as a datetime object.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The datetime object is timezone-aware.
|
||
|
|
"""
|
||
|
|
return parse_date(self.headers.get("If-Modified-Since"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def if_unmodified_since(self) -> t.Optional[datetime]:
|
||
|
|
"""The parsed `If-Unmodified-Since` header as a datetime object.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The datetime object is timezone-aware.
|
||
|
|
"""
|
||
|
|
return parse_date(self.headers.get("If-Unmodified-Since"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def if_range(self) -> IfRange:
|
||
|
|
"""The parsed ``If-Range`` header.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
``IfRange.date`` is timezone-aware.
|
||
|
|
|
||
|
|
.. versionadded:: 0.7
|
||
|
|
"""
|
||
|
|
return parse_if_range_header(self.headers.get("If-Range"))
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def range(self) -> t.Optional[Range]:
|
||
|
|
"""The parsed `Range` header.
|
||
|
|
|
||
|
|
.. versionadded:: 0.7
|
||
|
|
|
||
|
|
:rtype: :class:`~werkzeug.datastructures.Range`
|
||
|
|
"""
|
||
|
|
return parse_range_header(self.headers.get("Range"))
|
||
|
|
|
||
|
|
# User Agent
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def user_agent(self) -> UserAgent:
|
||
|
|
"""The user agent. Use ``user_agent.string`` to get the header
|
||
|
|
value. Set :attr:`user_agent_class` to a subclass of
|
||
|
|
:class:`~werkzeug.user_agent.UserAgent` to provide parsing for
|
||
|
|
the other properties or other extended data.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The built in parser is deprecated and will be removed in
|
||
|
|
Werkzeug 2.1. A ``UserAgent`` subclass must be set to parse
|
||
|
|
data from the string.
|
||
|
|
"""
|
||
|
|
return self.user_agent_class(self.headers.get("User-Agent", ""))
|
||
|
|
|
||
|
|
# Authorization
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def authorization(self) -> t.Optional[Authorization]:
|
||
|
|
"""The `Authorization` object in parsed form."""
|
||
|
|
return parse_authorization_header(self.headers.get("Authorization"))
|
||
|
|
|
||
|
|
# CORS
|
||
|
|
|
||
|
|
origin = header_property[str](
|
||
|
|
"Origin",
|
||
|
|
doc=(
|
||
|
|
"The host that the request originated from. Set"
|
||
|
|
" :attr:`~CORSResponseMixin.access_control_allow_origin` on"
|
||
|
|
" the response to indicate which origins are allowed."
|
||
|
|
),
|
||
|
|
read_only=True,
|
||
|
|
)
|
||
|
|
|
||
|
|
access_control_request_headers = header_property(
|
||
|
|
"Access-Control-Request-Headers",
|
||
|
|
load_func=parse_set_header,
|
||
|
|
doc=(
|
||
|
|
"Sent with a preflight request to indicate which headers"
|
||
|
|
" will be sent with the cross origin request. Set"
|
||
|
|
" :attr:`~CORSResponseMixin.access_control_allow_headers`"
|
||
|
|
" on the response to indicate which headers are allowed."
|
||
|
|
),
|
||
|
|
read_only=True,
|
||
|
|
)
|
||
|
|
|
||
|
|
access_control_request_method = header_property[str](
|
||
|
|
"Access-Control-Request-Method",
|
||
|
|
doc=(
|
||
|
|
"Sent with a preflight request to indicate which method"
|
||
|
|
" will be used for the cross origin request. Set"
|
||
|
|
" :attr:`~CORSResponseMixin.access_control_allow_methods`"
|
||
|
|
" on the response to indicate which methods are allowed."
|
||
|
|
),
|
||
|
|
read_only=True,
|
||
|
|
)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_json(self) -> bool:
|
||
|
|
"""Check if the mimetype indicates JSON data, either
|
||
|
|
:mimetype:`application/json` or :mimetype:`application/*+json`.
|
||
|
|
"""
|
||
|
|
mt = self.mimetype
|
||
|
|
return (
|
||
|
|
mt == "application/json"
|
||
|
|
or mt.startswith("application/")
|
||
|
|
and mt.endswith("+json")
|
||
|
|
)
|