Connexion 3 is now in Alpha 🎉

Connexion can now be used as middleware to supercharge any ASGI or WSGI compatible framework.
Aiohttp support has been dropped in favor of an ASGI compatible AsyncApp built on top of Starlette.
Connexion functionality is now pluggable by adding or removing middleware.
Validation is now pluggable by content type, solving longstanding issues regarding endpoints with
multiple content types and providing a pluggable interface.

Breaking changes

Aiohttp support was dropped, use connexion.AsyncApp instead
The options argument has been renamed to swagger_ui_options
The uri_parser_class is now passed to the App or its add_api() method directly
instead of via the options argument.
The jsonifier is now passed to the App or its add_api() method instead of setting it
as an attribute on the Api.
Drop Flask 1.X support and support Flask 2.X async routes
Drop Python 3.6 (and add Python 3.10) support
connexion.request is now a Starlette Request instead of a Flask Request
Route priority changed. The most specific route should now be defined first in the specification.
We no longer guess a content type for response serialization if multiple are defined in the spec.
We do take into account returned headers.
Don't return 400 when read-only property is received
Content type is now validated for requests and responses if defined in the spec
The deprecated positions for x-body-name are no longer supported
The parameter pass_context_arg_name has been removed. Context is now available as global
request-level context, or can be passed in by defining a context_ parameter in your view function.
The MethodViewResolver has been renamed to MethodResolver, and a new MethodViewResolver
has been added to work with Flask's MethodView specifically.
Built-in support for uWSGI has been removed. You can re-add this functionality using a custom middleware.

What's Changed

Drop aiohttp support by @RobbeSneyders in #1491
Add Python 3.10 in favor of 3.6 by @RobbeSneyders in #1494
Add empty connexion middleware by @RobbeSneyders in #1502
Extract Swagger UI functionality into middleware by @RobbeSneyders in #1496
Add pre-commit hook by @RobbeSneyders in #1511
Add routing middleware by @RobbeSneyders in #1497
Extract security to middleware by @RobbeSneyders in #1514
Remove myself (Rafael Caricio) as maintainer by @rafaelcaricio in #1517
Merge V2 to main by @RobbeSneyders in #1518
Fix deprecation warning for Validator.iter_errors by @jonasboecquaert in #1536
Refactor routing into middleware-api-operation model by @RobbeSneyders in #1533
Clean up operation classes by @RobbeSneyders in #1535
Removed jsonschema version check by @jonasboecquaert in #1540
Remove built-in support for uWSGI by @jacobstanly89 in #1544
Fix for bug of the function is_json_mimetype() by @jacobstanly89 in #1541
Use resolver in security middleware by @RobbeSneyders in #1553
call as_view in methodresolver by @bluebrown in #1552
Fix async tests by @Ruwann in #1558
Add test for MethodViewResolver by @RobbeSneyders in #1559
debug mode interaction for non-flask server by @thvu11 in #1556
Add .git-blame-ignore-revs file with black commit by @RobbeSneyders in #1561
Feature/method views args by @bluebrown in #1564
Activate mypy check in pre-commit by @RobbeSneyders in #1560
Remove "type: ignore" by using list(dict), not dict.keys() by @cclauss in #1575
Merge v2 to main by @RobbeSneyders in #1579
Resolve $ref referring to another $ref by @chibacchie in #1584
Update json for Flask 2.3 by @RobbeSneyders in #1582
Use Flask request_ctx instead of _request_ctx_stack by @RobbeSneyders in #1583
setup.py: Update url by @jayvdb in #1586
Extract JSON request body validation to middleware by @RobbeSneyders in #1588
Remove AbstractSwaggerUIAPI class by @RobbeSneyders in #1589
Removed internal variable pass_context_arg_name by @leonardofesta in #1568
Explicitly support Flask async routes by @RobbeSneyders in #1592
Extract boilerplate code into Routed base classes by @RobbeSneyders in #1590
Move JSON response body validation to middleware by @RobbeSneyders in #1591
Remove support for deprecated x-body-name position by @RobbeSneyders in #1600
Avoid warning with jsonschema 4.16.0 by @gaetano-guerriero in #1601
Add form data validator for validation middleware by @RobbeSneyders in #1595
Flask apps only signal an exception on real server errors by @enerqi in #1611
Move parameter validation to middleware by @RobbeSneyders in #1610
Add async app by @RobbeSneyders in #1613
Update examples for Connexion 3.0 by @RobbeSneyders in #1615
Refactor decorators by @RobbeSneyders in #1618
Switch to own maintained version of swagger-ui by @RobbeSneyders in #1619
Expose additional context by @RobbeSneyders in #1620
Implement user facing interface for ConnexionMiddleware by @RobbeSneyders in #1621
Enable enforcing defaults by @RobbeSneyders in #1616
Cache operation body definition by @RobbeSneyders in #1626
Coerce types only in uri parser by @RobbeSneyders in #1627
Introduce poetry by @RobbeSneyders in #1628
Bump httpx version to 0.23 to mitigate GHSA-h8pj-cxx2-jfg2 by @RobbeSneyders in #1632
Refactor tests by @RobbeSneyders in #1631
Define request interface and align WSGI and ASGI by @RobbeSneyders in #1636
Feature/request context by @RobbeSneyders in #1639
Add error handlers for AsyncApp by @RobbeSneyders in #1640
Make tests framework agnostic by @RobbeSneyders in #1634
Bump starlette version by @Ruwann in #1641
Bump a2wsgi and drop monkeypatch by @RobbeSneyders in #1647
Update NumberConverter regex to match new Werkzeug behavior (v3) by @RobbeSneyders in #1644
Re-add tests for multiple and mixed file uploads by @RobbeSneyders in #1642
Add support for relative refs in spec by @RobbeSneyders in #1648
Clean up errors and fix hierarchy by @RobbeSneyders in #1649
Enforce required RequestBody by @RobbeSneyders in #1652
Create abstract validator classes by @RobbeSneyders in #1653
Enable response mimetype validation for non-error responses by @RobbeSneyders in #1654
Don't return 400 when read-only property is provided by @RobbeSneyders in #1655
Add jsonifier as argument to app / api by @RobbeSneyders in #1656
Add high-level documentation for 3.0 by @RobbeSneyders in #1646
Run release pipeline for pre-releases as well by @RobbeSneyders in #1658
Fix filter pattern in release pipeline by @RobbeSneyders in #1659