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.
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:
Skip app.run when a Flask application is run from the command
line. This avoids some behavior that was confusing to debug.
Change the default for JSONIFY_PRETTYPRINT_REGULAR to
False. ~json.jsonify returns a compact format by default,
and an indented format in debug mode. :pr:2193
Flask.__init__ accepts the host_matching argument and sets
it on Flask.url_map. :issue:1559
Flask.__init__ accepts the static_host argument and passes
it as the host argument when defining the static route.
:issue:1559
send_file supports Unicode in attachment_filename.
:pr:2223
Pass _scheme argument from url_for to
Flask.handle_url_build_error. :pr:2017
Flask.add_url_rule accepts the provide_automatic_options
argument to disable adding the OPTIONS method. :pr:1489
MethodView subclasses inherit method handlers from base classes.
:pr:1936
Errors caused while opening the session at the beginning of the
request are handled by the app's error handlers. :pr:2254
Blueprints gained Blueprint.json_encoder and
Blueprint.json_decoder attributes to override the app's
encoder and decoder. :pr:1898
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. :pr:2256
Add routes CLI command to output routes registered on the
application. :pr: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. :pr:2282
Allow IP address as exact session cookie domain. :pr:2282
SESSION_COOKIE_DOMAIN is set if it is detected through
SERVER_NAME. :pr:2282
Auto-detect zero-argument app factory called create_app or
make_app from FLASK_APP. :pr: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 ScriptInfo
object will be passed. :pr:2319
FLASK_APP can be set to an app factory, with arguments if
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Bumps flask from 0.12.2 to 1.0.
Release notes
Sourced from flask's releases.
... (truncated)
Changelog
Sourced from flask's changelog.
... (truncated)
Commits
291f3c3Bump version number to 1.036e68a4release 1.0216151cMerge branch '0.12-maintenance'23047a7Bump version number to 0.12.4.dev1a9e58eBump version number to 0.12.363deee0release 0.12.3062745bMerge pull request #2720 from pallets/setup-link5c8110densure order of project urls10a77a5Add project_urls so that PyPI will show GitHub stats.22992a0add donate linkDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/github/platform-samples/network/alerts).