This fixes a bug where we would previously not validate the format of
APNS tokens before writing them to the database, which could lead to
exceptions in the push notifications system if a buggy mobile app
submitted invalid format tokens.
This is an incomplete cleaned-up continuation of Lisa Neigut's push
notification bouncer work. It supports registration and
deregistration of individual push tokens with a central push
notification bouncer server.
It still is missing a few things before we can complete this effort:
* A registration form for server admins to configure their server for
this service, with tests.
* Code (and tests) for actually bouncing the notifications.
Change `from django.utils.timezone import now` to
`from django.utils import timezone`.
This is both because now() is ambiguous (could be datetime.datetime.now),
and more importantly to make it easier to write a lint rule against
datetime.datetime.now().
When we push a device token, we want to clean out any other user's
tokens on the device, but not the current user's. We were wiping
away our own token, if it existed, before creating it again. This
was probably never a user-facing problem; it just made for dead code
and a little unnecessary DB churn. By excluding the current user
from the delete() call, we exercise the update path in our tests now,
so we have 100% coverage.
Tim Abbott
Rishi Gupta
Steve Howell
Tim Abbott