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 sidesteps tricky escaping issues, and will make it easier to
build a strict Content-Security-Policy.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
We had several patches to spectrum, but the only essential one
(0ea770fc18) had already been fixed upstream,
and another was just handling jQuery deprecation warnings for not yet removed features.
See #12749 for details.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
Bootstrap's typeahead is the main part of the project that we've
forked, and moving it to its own module should help unlock our ability
to upgrade bootstrap itself.
This commit works by vendoring the couple functions we still use from
puppetlabs stdlib (join and range), but removing the rest of the
puppetlabs codebase, and of course cleaning up our linter rules in the
process.
Fixes#7423.
Also, add a new notification sound, "ding". It comes from
https://freesound.org, where the original Zulip notification sound comes
from as well. In the future, new sounds can be added by adding audio
files to the `static/audio/notification_sounds` directory.
Tweaked significantly by tabbott:
* Avoided removing static/audio/zulip.ogg, because that file is
checked for by old versions of the desktop app.
* Added a views check for the sound being valid + tests.
* Added additional tests.
* Restructured the test_events test to be cleaner.
* Removed check_bool_or_string.
* Increased max length of notification_sound.
* Provide available_notification_sounds in events data set if global
notifications settings are requested.
Fixes#8051.
We don't reference this anymore (it was only ever used by the Dropbox
integration, which was hardcoded-off for years before being removed in
e6833b6427)
Take the core of the logic from how Debian generates the system's
/etc/ssl/certs/ssl-cert-snakeoil.pem ; that gives me more confidence
in the various config choices, and it also demonstrates a much cleaner
way to use the `openssl` tool. Also replace the outer shell logic for
CLI and logging with a cleaner version.
This old third party library added support
for a "mousewheel" event to detect scrolling.
However, it is not compatible with jQuery 3
and is obsolete now that there is a standard
"wheel" event that accomplishes the same thing.
- Remove `perfect-scrollbar` from `static/third` and fetch it from npm.
- Upgrade `perfect-scrollbar` to 0.7.1.
- Bump up the `PROVISION_VERSION` to 5.6.
Changed `wheelSpeed` in "static/js/scroll_bar.js" to 0.5, because when it
20, the scrollbar scrolls very fast.
Changed 'wheelSpeed' in "static/js/emoji_picker.js" from 25 to 0.68
(based on tabbott's testing of scrolling through the emoji list).
Part of #1709.
Apparently, the updated version of this has a serious scrolling
performance problem in the left sidebar that basically makes scrolling
in that area unusable.
This reverts commit b683b2d3c3.
- Remove `jquery-mousewheel` from `static/third` and fetch it from npm.
- Upgrade `jquery-mousewheel` to 3.1.6.
- Bump up the `PROVISION_VERSION` to 4.5.
- Change some js code to comply with this `jquery-mousewheel` version.
Part of #1709.
- Remove `underscore.js` from `static/third` and fetch it from `npm`.
- Upgrade `underscore.js` to 1.8.3.
- Bump up the `PROVISION_VERSION` to 4.2.
Part of #1709
- Remove `codepointat` from `static/third` and fetch it from `npm`.
- Upgrade `codepointat` to 0.2.0.
- Bump up the `PROVISION_VERSION` to 4.1.
Part of #1709.
- Remove `winchan.js` from `static/third` and fetch it from `npm`.
- Upgrade `winchan` to 0.2.0.
- Bump up the `PROVISION_VERSION` to 4.0.
Part of #1709.
This reverts commit 7bf10ec74f.
Apparently, SockJS 1.1.1 is broken with the browser used in our legacy
desktop app, resulting in messages being silently not sent.
The changes that required us to fork this extension had been merged
into upstream CodeHilite, so we can remove it and switch to using the
version that comes with python-markdown.
(Most of this work was done by acrefoot in an earlier branch.
I took over the branch to fix casper tests that were broken during
the upgrade (which were fixed in a different commit). I also
made most of the changes to run-casper.)
This also upgrades phantomjs to 2.1.7.
The huge structural change here is that we no longer vendor casperjs
or download phantomjs with our own script. Instead, we just use
casperjs and phantomjs from npm, via package.json.
Another thing that we do now is run casperjs tests individually, so
that we don't get strange test flakes from test interactions. (Tests
can still influence each other in terms of changing data, since we
don't yet have code to clear the test database in between tests.)
A lot of this diff is just removing files and obsolete configurations.
The main new piece is in package.json, which causes npm to install the
new version.
Also, run-casper now runs files individually, as mentioned above.
We had vendored casperjs in the past. I didn't bring over any of our
changes. Some of the changes were performance-related (primarily
5fd58cf249), so the upgraded version may
be slower in some instances. (I didn't do much measurement of that,
since most of our slowness when running tests is about the setup
environment, not casper itself.) Any bug fixes that we may have
implemented in the past were either magically fixed by changes to
casper itself or by improvements we have made in the tests themselves
over the years.
Tim tested the Casper suite on his machine and running the full Casper
test suite is faster than it was before this change (1m30 vs. 1m50),
so we're at least not regressing overall performance.
Anders Kaseorg
Tim Abbott
rht
Marco Burstein
Yashashvi Dave
Aman Ghebreweldi
Greg Price
Robert Hönig
Cory Lynch
Rafid Aslam
Rishi Gupta
adnrs96
Brock Whittaker
K.Kanakhin
kevv87
Steve Howell