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- import typing as t
- from werkzeug.exceptions import BadRequest
- from werkzeug.wrappers import Request as RequestBase
- from werkzeug.wrappers import Response as ResponseBase
- from . import json
- from .globals import current_app
- from .helpers import _split_blueprint_path
- if t.TYPE_CHECKING:
- import typing_extensions as te
- from werkzeug.routing import Rule
- class Request(RequestBase):
- """The request object used by default in Flask. Remembers the
- matched endpoint and view arguments.
- It is what ends up as :class:`~flask.request`. If you want to replace
- the request object used you can subclass this and set
- :attr:`~flask.Flask.request_class` to your subclass.
- The request object is a :class:`~werkzeug.wrappers.Request` subclass and
- provides all of the attributes Werkzeug defines plus a few Flask
- specific ones.
- """
- json_module = json
- #: The internal URL rule that matched the request. This can be
- #: useful to inspect which methods are allowed for the URL from
- #: a before/after handler (``request.url_rule.methods``) etc.
- #: Though if the request's method was invalid for the URL rule,
- #: the valid list is available in ``routing_exception.valid_methods``
- #: instead (an attribute of the Werkzeug exception
- #: :exc:`~werkzeug.exceptions.MethodNotAllowed`)
- #: because the request was never internally bound.
- #:
- #: .. versionadded:: 0.6
- url_rule: t.Optional["Rule"] = None
- #: A dict of view arguments that matched the request. If an exception
- #: happened when matching, this will be ``None``.
- view_args: t.Optional[t.Dict[str, t.Any]] = None
- #: If matching the URL failed, this is the exception that will be
- #: raised / was raised as part of the request handling. This is
- #: usually a :exc:`~werkzeug.exceptions.NotFound` exception or
- #: something similar.
- routing_exception: t.Optional[Exception] = None
- @property
- def max_content_length(self) -> t.Optional[int]: # type: ignore
- """Read-only view of the ``MAX_CONTENT_LENGTH`` config key."""
- if current_app:
- return current_app.config["MAX_CONTENT_LENGTH"]
- else:
- return None
- @property
- def endpoint(self) -> t.Optional[str]:
- """The endpoint that matched the request URL.
- This will be ``None`` if matching failed or has not been
- performed yet.
- This in combination with :attr:`view_args` can be used to
- reconstruct the same URL or a modified URL.
- """
- if self.url_rule is not None:
- return self.url_rule.endpoint
- return None
- @property
- def blueprint(self) -> t.Optional[str]:
- """The registered name of the current blueprint.
- This will be ``None`` if the endpoint is not part of a
- blueprint, or if URL matching failed or has not been performed
- yet.
- This does not necessarily match the name the blueprint was
- created with. It may have been nested, or registered with a
- different name.
- """
- endpoint = self.endpoint
- if endpoint is not None and "." in endpoint:
- return endpoint.rpartition(".")[0]
- return None
- @property
- def blueprints(self) -> t.List[str]:
- """The registered names of the current blueprint upwards through
- parent blueprints.
- This will be an empty list if there is no current blueprint, or
- if URL matching failed.
- .. versionadded:: 2.0.1
- """
- name = self.blueprint
- if name is None:
- return []
- return _split_blueprint_path(name)
- def _load_form_data(self) -> None:
- RequestBase._load_form_data(self)
- # In debug mode we're replacing the files multidict with an ad-hoc
- # subclass that raises a different error for key errors.
- if (
- current_app
- and current_app.debug
- and self.mimetype != "multipart/form-data"
- and not self.files
- ):
- from .debughelpers import attach_enctype_error_multidict
- attach_enctype_error_multidict(self)
- def on_json_loading_failed(self, e: Exception) -> "te.NoReturn":
- if current_app and current_app.debug:
- raise BadRequest(f"Failed to decode JSON object: {e}")
- raise BadRequest()
- class Response(ResponseBase):
- """The response object that is used by default in Flask. Works like the
- response object from Werkzeug but is set to have an HTML mimetype by
- default. Quite often you don't have to create this object yourself because
- :meth:`~flask.Flask.make_response` will take care of that for you.
- If you want to replace the response object used you can subclass this and
- set :attr:`~flask.Flask.response_class` to your subclass.
- .. versionchanged:: 1.0
- JSON support is added to the response, like the request. This is useful
- when testing to get the test client response data as JSON.
- .. versionchanged:: 1.0
- Added :attr:`max_cookie_size`.
- """
- default_mimetype = "text/html"
- json_module = json
- @property
- def max_cookie_size(self) -> int: # type: ignore
- """Read-only view of the :data:`MAX_COOKIE_SIZE` config key.
- See :attr:`~werkzeug.wrappers.Response.max_cookie_size` in
- Werkzeug's docs.
- """
- if current_app:
- return current_app.config["MAX_COOKIE_SIZE"]
- # return Werkzeug's default when not in an app context
- return super().max_cookie_size
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