Zulip has had a small use of WebSockets (specifically, for the code
path of sending messages, via the webapp only) since ~2013. We
originally added this use of WebSockets in the hope that the latency
benefits of doing so would allow us to avoid implementing a markdown
local echo; they were not. Further, HTTP/2 may have eliminated the
latency difference we hoped to exploit by using WebSockets in any
case.
While we’d originally imagined using WebSockets for other endpoints,
there was never a good justification for moving more components to the
WebSockets system.
This WebSockets code path had a lot of downsides/complexity,
including:
* The messy hack involving constructing an emulated request object to
hook into doing Django requests.
* The `message_senders` queue processor system, which increases RAM
needs and must be provisioned independently from the rest of the
server).
* A duplicate check_send_receive_time Nagios test specific to
WebSockets.
* The requirement for users to have their firewalls/NATs allow
WebSocket connections, and a setting to disable them for networks
where WebSockets don’t work.
* Dependencies on the SockJS family of libraries, which has at times
been poorly maintained, and periodically throws random JavaScript
exceptions in our production environments without a deep enough
traceback to effectively investigate.
* A total of about 1600 lines of our code related to the feature.
* Increased load on the Tornado system, especially around a Zulip
server restart, and especially for large installations like
zulipchat.com, resulting in extra delay before messages can be sent
again.
As detailed in
https://github.com/zulip/zulip/pull/12862#issuecomment-536152397, it
appears that removing WebSockets moderately increases the time it
takes for the `send_message` API query to return from the server, but
does not significantly change the time between when a message is sent
and when it is received by clients. We don’t understand the reason
for that change (suggesting the possibility of a measurement error),
and even if it is a real change, we consider that potential small
latency regression to be acceptable.
If we later want WebSockets, we’ll likely want to just use Django
Channels.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This change serves to declutter webhook-errors.log, which is
filled with too many UnexpectedWebhookEventType exceptions.
Keeping UnexpectedWebhookEventType in zerver/lib/webhooks/common.py
led to a cyclic import when we tried to import the exception in
zerver/decorators.py, so this commit also moves this exception to
another appropriate module. Note that our webhooks still import
this exception via zerver/lib/webhooks/common.py.
This is a simple, non-intrusive way of removing the bulk of the
clutter from `var/<uuid>/test-backend` after running `test-backend`.
Ideally, we'll replace this logic with proper tearDown methods.
A function was written in `test_fixtures.py` to drop a test database
template if the corresponding database id doesn't belong to a file.
Alongside this fact, every file that is written is removed after 60
minutes. Meaning any potential database template can never exist
longer than one hour.
This follow-up work was added to deal with the potential race
conditions when running `test-backend`. Ensuring that all templates
are properly dealt with.
Essentially rewritten by tabbott for cleanliness.
Fixes the remainder of #12426.
The number of processes to run the backend tests is currently a
hardcoded value, this commit transistions the default to be based on the
number of logical CPUs available.
The github-services model for how GitHub would send requests to this
legacy integration is no longer available since earlier in 2019.
Removing this integration also allows us to finally remove
authenticated_api_view, the legacy authentication model from 2013 that
had been used for this integration (and other features long since
upgraded).
A few functions that were used by the Beanstalk webhook are moved into
that webhook's implementation directly.
This optimizes test-backend by skipping webhook
tests when run in default mode.
Tweaked by tabbott to extend the documentation and update the CI
commands.
This library was absolutely essential as part of our Python 2->3
migration process, but all of its calls should be either no-ops or
encode/decode operations.
Note also that the library has been wrong since the incorrect
refactoring in 1f9244e060.
Fixes#10807.
This commit adds a test for the payload that is generated when
a Task is moved from one user story to another on Taiga's Sprint
Taskboard UI.
This commit also gets up this webhook's test coverage up to 100%.
IFTTT allows custom templating for their payloads, so the onus is
on the user to ensure that their custom templates conform to the
expectations outlined in our IFTTT webhook docs. For that reason,
these payloads weren't generated, but were manually edited.
After discovering a couple of bugs, I decided to thoroughly test
and rewrite this integration from scratch. The older code wasn't
generating coherent messages.
This also commit gets this integration up to 100% test coverage.
Test coverage was improved by removing an unused function and
removing some code (written by me) that was actually handling
Test Hook event types incorrectly.
It was a painful amount of work to generate the actual payload.
Since the only difference was a small build URL, I manually
edited the payload and used that for testing.
This commit gets our GitHub webhook up to 100% test coverage.
Note that Freshdesk allows custom templating for outgoing payloads
in their webhook UI. Therefore, the payloads added in this commit
did not have to be official payloads from Freshdesk.
The lack of coverage was due to:
* An unused function that was never used anywhere.
* get_commit_status_changed_body was using a regex where it didn't
really need to use one. And there was an if statement that
assumed that the payload might NOT contain the URL to the commit.
However, I checked the payload and there shouldn't be any instances
where a commit event is generated but there is no URL to the commit.
* get_push_tag_body had an `else` condition that really can't happen
in any payload. I verified this by checking the BitBucket webhook
docs.
We shouldn't just ignore exceptions when encoding the incoming
auth credentials. Even if the incoming credentials are properly
encoded, it is better to know when that is the case or if
something else fails.
Since this class was built, folks have always chosen
to subclass JsonableError for situations where
the default of ErrorCode.BAD_REQUEST is insufficient.
So now we simplify the use cases, which also gets
us 100% coverage on this core module.
Right now it only has one function, but the function
we removed never really belonged in actions.py, and
now we have better test coverage on actions.py, which
is an important module to get to 100%.
Anders Kaseorg
Vishnu KS
Tim Abbott
Wyatt Hoodes
Hemanth V. Alluri
Eeshan Garg
Aman Agrawal
Mateusz Mandera
Raymond Akornor
Anders Kaseorg
Steve Howell
Yago González
Rhea Parekh