This is just enough of a quick fix to work with a stock Zulip 1.6
server. We should really also make this robust to arbitrary input
from the remote Zulip server, even though it'll be a little tedious.
And it works!
A couple of things still to do:
* When a device token is no longer active, we'll get HTTP status 410.
We should then remove the token from the database so we don't keep
trying to push to it. This is fairly urgent.
* The library we're using has a nice asynchronous API, but this
version doesn't use it. This is OK now, but async will be
essential at scale.
This code empirically doesn't work. It's not entirely clear why, even
having done quite a bit of debugging; partly because the code is quite
convoluted, and because it shows the symptoms of people making changes
over time without really understanding how it was supposed to work.
Moreover, this code targets an old version of the APNs provider API.
Apple deprecated that in 2015, in favor of a shiny new one which uses
HTTP/2 to meet the same needs for concurrency and scale that the old
one had to do a bunch of ad-hoc protocol design for.
So, rip this code out. We'll build a pathway to the new API from
scratch; it's not that complicated.
The whole thing is an error, so "message" is a more apt word for the
error message specifically. We abbreviate that as `msg` in the actual
HTTP responses and in the signatures of `json_error` and friends, so
do the same here.
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 fixes most cases where we were assigning a user to
the var email and then calling get_user_profile_by_email with
that var.
(This was fixed mostly with a script.)
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.
This refactoring is preparation for being able to forward push
notifications to users on behalf of another Zulip server.
The goal is to remove access to the current server's database from the
send_*_push_notification code paths.
