Flask Version 0.8 to Version 0.9

2021-08-11 21:32 更新

Version 0.8

Released on September 29th 2011, codename Rakija

Refactored session support into a session interface so that the implementation of the sessions can be changed without having to override the Flask class.
Empty session cookies are now deleted properly automatically.
View functions can now opt out of getting the automatic OPTIONS implementation.
HTTP exceptions and Bad Request errors can now be trapped so that they show up normally in the traceback.
Flask in debug mode is now detecting some common problems and tries to warn you about them.
Flask in debug mode will now complain with an assertion error if a view was attached after the first request was handled. This gives earlier feedback when users forget to import view code ahead of time.
Added the ability to register callbacks that are only triggered once at the beginning of the first request. (Flask.before_first_request())
Malformed JSON data will now trigger a bad request HTTP exception instead of a value error which usually would result in a 500 internal server error if not handled. This is a backwards incompatible change.
Applications now not only have a root path where the resources and modules are located but also an instance path which is the designated place to drop files that are modified at runtime (uploads etc.). Also this is conceptionally only instance depending and outside version control so it’s the perfect place to put configuration files etc. For more information see 實(shí)例文件夾.
Added the APPLICATION_ROOT configuration variable.
Implemented session_transaction() to easily modify sessions from the test environment.
Refactored test client internally. The APPLICATION_ROOT configuration variable as well as SERVER_NAME are now properly used by the test client as defaults.
Added flask.views.View.decorators to support simpler decorating of pluggable (class-based) views.
Fixed an issue where the test client if used with the “with” statement did not trigger the execution of the teardown handlers.
Added finer control over the session cookie parameters.
HEAD requests to a method view now automatically dispatch to the get method if no handler was implemented.
Implemented the virtual flask.ext package to import extensions from.
The context preservation on exceptions is now an integral component of Flask itself and no longer of the test client. This cleaned up some internal logic and lowers the odds of runaway request contexts in unittests.

Version 0.8.1

Bugfix release, released on July 1st 2012

Fixed an issue with the undocumented flask.session module to not work properly on Python 2.5. It should not be used but did cause some problems for package managers.

Version 0.9

Released on July 1st 2012, codename Campari.

The flask.Request.on_json_loading_failed() now returns a JSON formatted response by default.
The flask.url_for() function now can generate anchors to the generated links.
The flask.url_for() function now can also explicitly generate URL rules specific to a given HTTP method.
Logger now only returns the debug log setting if it was not set explicitly.
Unregister a circular dependency between the WSGI environment and the request object when shutting down the request. This means that environ werkzeug.request will be None after the response was returned to the WSGI server but has the advantage that the garbage collector is not needed on CPython to tear down the request unless the user created circular dependencies themselves.
Session is now stored after callbacks so that if the session payload is stored in the session you can still modify it in an after request callback.
The flask.Flask class will avoid importing the provided import name if it can (the required first parameter), to benefit tools which build Flask instances programmatically. The Flask class will fall back to using import on systems with custom module hooks, e.g. Google App Engine, or when the import name is inside a zip archive (usually a .egg) prior to Python 2.7.
Blueprints now have a decorator to add custom template filters application wide, flask.Blueprint.app_template_filter().
The Flask and Blueprint classes now have a non-decorator method for adding custom template filters application wide, flask.Flask.add_template_filter() and flask.Blueprint.add_app_template_filter().
The flask.get_flashed_messages() function now allows rendering flashed message categories in separate blocks, through a category_filter argument.
The flask.Flask.run() method now accepts None for host and port arguments, using default values when None. This allows for calling run using configuration values, e.g. app.run(app.config.get('MYHOST'), app.config.get('MYPORT')), with proper behavior whether or not a config file is provided.
The flask.render_template() method now accepts a either an iterable of template names or a single template name. Previously, it only accepted a single template name. On an iterable, the first template found is rendered.
Added flask.Flask.app_context() which works very similar to the request context but only provides access to the current application. This also adds support for URL generation without an active request context.
View functions can now return a tuple with the first instance being an instance of flask.Response. This allows for returning jsonify(error="error msg"), 400 from a view function.
Flask and Blueprint now provide a get_send_file_max_age() hook for subclasses to override behavior of serving static files from Flask when using flask.Flask.send_static_file() (used for the default static file handler) and send_file(). This hook is provided a filename, which for example allows changing cache controls by file extension. The default max-age for send_file and static files can be configured through a new SEND_FILE_MAX_AGE_DEFAULT configuration variable, which is used in the default get_send_file_max_age implementation.
Fixed an assumption in sessions implementation which could break message flashing on sessions implementations which use external storage.
Changed the behavior of tuple return values from functions. They are no longer arguments to the response object, they now have a defined meaning.
Added flask.Flask.request_globals_class to allow a specific class to be used on creation of the g instance of each request.
Added required_methods attribute to view functions to force-add methods on registration.
Added flask.after_this_request().
Added flask.stream_with_context() and the ability to push contexts multiple times without producing unexpected behavior.

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