You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.1 KiB
92 lines
3.1 KiB
from __future__ import annotations
|
|
|
|
import os
|
|
import typing as t
|
|
from datetime import timedelta
|
|
|
|
from .globals import current_app
|
|
from .helpers import send_from_directory
|
|
from .sansio.blueprints import Blueprint as SansioBlueprint
|
|
from .sansio.blueprints import BlueprintSetupState as BlueprintSetupState # noqa
|
|
|
|
if t.TYPE_CHECKING: # pragma: no cover
|
|
from .wrappers import Response
|
|
|
|
|
|
class Blueprint(SansioBlueprint):
|
|
def get_send_file_max_age(self, filename: str | None) -> int | None:
|
|
"""Used by :func:`send_file` to determine the ``max_age`` cache
|
|
value for a given file path if it wasn't passed.
|
|
|
|
By default, this returns :data:`SEND_FILE_MAX_AGE_DEFAULT` from
|
|
the configuration of :data:`~flask.current_app`. This defaults
|
|
to ``None``, which tells the browser to use conditional requests
|
|
instead of a timed cache, which is usually preferable.
|
|
|
|
Note this is a duplicate of the same method in the Flask
|
|
class.
|
|
|
|
.. versionchanged:: 2.0
|
|
The default configuration is ``None`` instead of 12 hours.
|
|
|
|
.. versionadded:: 0.9
|
|
"""
|
|
value = current_app.config["SEND_FILE_MAX_AGE_DEFAULT"]
|
|
|
|
if value is None:
|
|
return None
|
|
|
|
if isinstance(value, timedelta):
|
|
return int(value.total_seconds())
|
|
|
|
return value # type: ignore[no-any-return]
|
|
|
|
def send_static_file(self, filename: str) -> Response:
|
|
"""The view function used to serve files from
|
|
:attr:`static_folder`. A route is automatically registered for
|
|
this view at :attr:`static_url_path` if :attr:`static_folder` is
|
|
set.
|
|
|
|
Note this is a duplicate of the same method in the Flask
|
|
class.
|
|
|
|
.. versionadded:: 0.5
|
|
|
|
"""
|
|
if not self.has_static_folder:
|
|
raise RuntimeError("'static_folder' must be set to serve static_files.")
|
|
|
|
# send_file only knows to call get_send_file_max_age on the app,
|
|
# call it here so it works for blueprints too.
|
|
max_age = self.get_send_file_max_age(filename)
|
|
return send_from_directory(
|
|
t.cast(str, self.static_folder), filename, max_age=max_age
|
|
)
|
|
|
|
def open_resource(self, resource: str, mode: str = "rb") -> t.IO[t.AnyStr]:
|
|
"""Open a resource file relative to :attr:`root_path` for
|
|
reading.
|
|
|
|
For example, if the file ``schema.sql`` is next to the file
|
|
``app.py`` where the ``Flask`` app is defined, it can be opened
|
|
with:
|
|
|
|
.. code-block:: python
|
|
|
|
with app.open_resource("schema.sql") as f:
|
|
conn.executescript(f.read())
|
|
|
|
:param resource: Path to the resource relative to
|
|
:attr:`root_path`.
|
|
:param mode: Open the file in this mode. Only reading is
|
|
supported, valid values are "r" (or "rt") and "rb".
|
|
|
|
Note this is a duplicate of the same method in the Flask
|
|
class.
|
|
|
|
"""
|
|
if mode not in {"r", "rt", "rb"}:
|
|
raise ValueError("Resources can only be opened for reading.")
|
|
|
|
return open(os.path.join(self.root_path, resource), mode)
|