Add support for falcon 3.0

Currently, Falcon ≥ 3.0.0-ALPHA is not supported by Sentry.

Falcon 3.0 renames the API class to APP. This trips the Sentry Falcon integration detection: the import of api_helpers is renamed to app_helpers.

https://github.com/getsentry/sentry-python/blob/41120009fa7d6cb88d9219cb20874c9dd705639d/sentry_sdk/integrations/falcon.py#L18-L24

Should be a simple fix, roughly:

 try: 
     import falcon  # type: ignore
     from falcon import __version__ as FALCON_VERSION

     try:  # from L102
         version = tuple(map(int, FALCON_VERSION.split(".")))
     except (ValueError, TypeError):
         raise DidNotEnable("Unparseable Falcon version: {}".format(FALCON_VERSION))

     if version < (3, 0)
         import falcon.api_helpers  # type: ignore
         falcon_helpers = falcon.api_helpers
     else:
         import falcon.app_helpers  # type: ignore
         falcon_helpers = falcon.app_helpers

 except ImportError:
     raise DidNotEnable("Falcon not installed")

and renaming all references to falcon.api_helpers to falcon_helpers.

A quick glance shows that PrepareMiddleware has not changed (returns the same tuple). I can go ahead and open a PR and check if other changes are necessary to support Falcon 3.0 before it comes out of alpha.

[sebheitzmann]

any news on that ? It seems that on falcon 3 the exceptions aren’t sent to sentry

[antonpirker]

Hello all!

We have two PRs from the community for this: https://github.com/getsentry/sentry-python/pull/1073 (For Falcon 3.0.0) https://github.com/getsentry/sentry-python/pull/1297 (For Falcon 3.0.1)

The current plan is to merge those two PRs into one (or pick one of them) and then bring this into shape so it is ready for review.

This could take some time as we want to make this right!