How is Flask evolving with its recent 3.1.0 release

How is Flask evolving with its recent 3.1.0 release

Flask's recent 3.1.0 release, launched on November 13, 2024, introduces several important changes and enhancements that reflect its ongoing evolution:

  • Dropped Support for Python 3.8: The new version no longer supports Python 3.8, aligning with the trend of moving towards more modern versions of Python to leverage improved features and security updates.

  • Updated Dependency Versions: Flask 3.1.0 updates its minimum dependencies to the latest feature releases, requiring Werkzeug version 3.1, ItsDangerous version 2.2, and Blinker version 1.9.

  • New Configuration Options: The release adds several configuration options, including:

    • A parameter for Flask.open_resource, open_instance_resource, and Blueprint.open_resource to specify the encoding when opening files in text mode (defaulting to UTF-8).

    • Customization of Request.max_content_length per request instead of globally through MAX_CONTENT_LENGTH, along with new configurations like MAX_FORM_MEMORY_SIZE and MAX_FORM_PARTS

  • Enhanced Security Features: Support for the Partitioned cookie attribute (CHIPS) has been added through the SESSION_COOKIE_PARTITIONED configuration. Additionally, documentation regarding resource limits has been improved for better security practices.

  • Improved Debugging Context Preservation: The implementation of context preservation during debugging has been enhanced, providing a more robust debugging experience.

  • Key Rotation Support: The configuration now includes SECRET_KEY_FALLBACKS, allowing for key rotation by maintaining a list of old secret keys that can still be used for unsigning.

These updates demonstrate Flask's commitment to modernization and security while enhancing usability for developers. The focus on improved configuration options and dependency management reflects the framework's adaptability to the evolving landscape of web development.

Citations:

  1. https://flask-es.readthedocs.io/changes/
  2. https://flask.palletsprojects.com/en/stable/changes/
  3. https://flask-sqlalchemy.readthedocs.io/en/stable/changes/
  4. https://flask.palletsprojects.com/en/stable/api/
  5. https://github.com/pallets-eco/flask-security-3.0/blob/develop/CHANGES
  6. https://www.reddit.com/r/Python/comments/17bnmxp/we_have_to_talk_about_flask/
  7. https://flask.palletsprojects.com

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