Sourced from flask's releases.

1.0

The Pallets team is pleased to release Flask 1.0. [Read the announcement on our blog.](https://www.palletsprojects.com/blog/flask-1-0-released/

There are over a year's worth of changes in this release. Many features have been improved or changed. Read the changelog to understand how your project's code will be affected.

JSON Security Fix

Flask previously decoded incoming JSON bytes using the content type of the request. Although JSON should only be encoded as UTF-8, Flask was more lenient. However, Python includes non-text related encodings that could result in unexpected memory use by a request.

Flask will now detect the encoding of incoming JSON data as one of the supported UTF encodings, and will not allow arbitrary encodings from the request.

Install or Upgrade

Install from PyPI with pip:

pip install -U Flask

0.12.4

This is a repackage of 0.12.3 to fix an issue with how the package was built.

Upgrade

Upgrade from PyPI with pip. Use a version identifier if you want to stay at 0.12:

pip install -U 'Flask~=0.12.4'

0.12.3

This release includes an important security fix for JSON and a minor backport for CLI support in PyCharm. It is provided for projects that cannot update to Flask 1.0 immediately. See the 1.0 announcement and update to it instead if possible.

JSON Security Fix

Flask previously decoded incoming JSON bytes using the content type of the request. Although JSON should only be encoded as UTF-8, Flask was more lenient. However, Python includes non-text related encodings that could result in unexpected memory use by a request.

Flask will now detect the encoding of incoming JSON data as one of the supported UTF encodings, and will not allow arbitrary encodings from the request.

Upgrade

Upgrade from PyPI with pip. Use a version identifier if you want to stay at 0.12:

pip install -U 'Flask~=0.12.3'

Sourced from flask's changelog.

Version 1.0

Released 2018-04-26

• Python 2.6 and 3.3 are no longer supported.
• Bump minimum dependency versions to the latest stable versions: Werkzeug >= 0.14, Jinja >= 2.10, itsdangerous >= 0.24, Click >= 5.1. :issue:2586
• Skip :meth:app.run <Flask.run> when a Flask application is run from the command line. This avoids some behavior that was confusing to debug.
• Change the default for :data:JSONIFY_PRETTYPRINT_REGULAR to False. :func:~json.jsonify returns a compact format by default, and an indented format in debug mode. 🇵🇷2193
• :meth:Flask.__init__ <Flask> accepts the host_matching argument and sets it on :attr:~Flask.url_map. :issue:1559
• :meth:Flask.__init__ <Flask> accepts the static_host argument and passes it as the host argument when defining the static route. :issue:1559
• :func:send_file supports Unicode in attachment_filename. 🇵🇷2223
• Pass _scheme argument from :func:url_for to :meth:~Flask.handle_url_build_error. 🇵🇷2017
• :meth:~Flask.add_url_rule accepts the provide_automatic_options argument to disable adding the OPTIONS method. 🇵🇷1489
• :class:~views.MethodView subclasses inherit method handlers from base classes. 🇵🇷1936
• Errors caused while opening the session at the beginning of the request are handled by the app's error handlers. 🇵🇷2254
• Blueprints gained :attr:~Blueprint.json_encoder and :attr:~Blueprint.json_decoder attributes to override the app's encoder and decoder. 🇵🇷1898
• :meth:Flask.make_response raises TypeError instead of ValueError for bad response types. The error messages have been improved to describe why the type is invalid. 🇵🇷2256
• Add routes CLI command to output routes registered on the application. 🇵🇷2259
• Show warning when session cookie domain is a bare hostname or an IP address, as these may not behave properly in some browsers, such as Chrome. 🇵🇷2282
• Allow IP address as exact session cookie domain. 🇵🇷2282
• SESSION_COOKIE_DOMAIN is set if it is detected through SERVER_NAME. 🇵🇷2282
• Auto-detect zero-argument app factory called create_app or make_app from FLASK_APP. 🇵🇷2297
• Factory functions are not required to take a script_info parameter to work with the flask command. If they take a single parameter or a parameter named script_info, the

• 291f3c3 Bump version number to 1.0
• 36e68a4 release 1.0
• 216151c Merge branch '0.12-maintenance'
• 23047a7 Bump version number to 0.12.4.dev
• 1a9e58e Bump version number to 0.12.3
• 63deee0 release 0.12.3
• 062745b Merge pull request #2720 from pallets/setup-link
• 5c8110d ensure order of project urls
• 10a77a5 Add project_urls so that PyPI will show GitHub stats.
• 22992a0 add donate link
• Additional commits viewable in compare view

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