get_send_file_max_age() — flask Function Reference

Architecture documentation for the get_send_file_max_age() function in blueprints.py from the flask codebase.

Function python ApplicationCore Scaffolding called by 1

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ApplicationCore→ Scaffolding→ get_send_file_max_age() — flask Function Reference

Dependency Diagram

graph TD
  afe24c34_5566_a80f_fbff_bb57cec6d844["get_send_file_max_age()"]
  43802377_8224_2289_2f49_1129adf043ee["Blueprint"]
  afe24c34_5566_a80f_fbff_bb57cec6d844 -->|defined in| 43802377_8224_2289_2f49_1129adf043ee
  4a852f3a_2bc8_50e9_493b_6ec8169d1a41["send_static_file()"]
  4a852f3a_2bc8_50e9_493b_6ec8169d1a41 -->|calls| afe24c34_5566_a80f_fbff_bb57cec6d844
  style afe24c34_5566_a80f_fbff_bb57cec6d844 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/flask/blueprints.py lines 55–80

    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]