This endpoint serves requests which might originate from an image
preview link which had an http url and the message holding the image
link was rendered before we introduced thumbnailing. In that case
we would have used a camo proxy to proxy http content over https and
avoid mix content warnings.
In near future, we plan to drop use of camo and just rely on thumbor
to serve such images. This endpoint helps maintain backward
compatibility for links which were already rendered.
This setting splits away part of responsibility from THUMBOR_URL.
Now on, this setting will be responsible for controlling whether
we thumbnail images or not by asking bugdown to render image links
to hit our /thumbnail endpoint. This is irrespective of what
THUMBOR_URL is set to though ideally THUMBOR_URL should be set
to point to a running thumbor instance.
This is somewhat hacky, in that in order to do what we're doing, we
need to parse the HTML of the rendered page to extract the first
paragraph to include in the open graph description field. But
BeautifulSoup does a good job of it.
This carries a nontrivial performance penalty for loading these pages,
but overall /help/ is a low-traffic site compared to the main app, so
it doesn't matter much.
(As a sidenote, it wouldn't be a bad idea to cache this stuff).
There's lots of things we can improve in this, largely through editing
the articles, but we can deal with that over time.
Thanks to Rishi for writing all the tests.
This adds a new realm_logo field, which is a horizontal-format logo to
be displayed in the top-left corner of the webapp, and any other
places where we might want a wide-format branding of the organization.
Tweaked significantly by tabbott to rebase, fix styling, etc.
Fixing the styling of this feature's loading indicator caused me to
notice the loading indicator for the realm_icon feature was also ugly,
so I fixed that too.
Fixes#7995.
Apparently, Django's get_current_site function (used, e.g., in
django-two-factor to look up the domain to use in QR codes) first
tries to use the Sites framework, and if unavailable, does the right
thing (namely, using request.get_host()).
We don't use the Sites framework for anything in Zulip, so the correct
fix is to just remove it.
Fixes#11014.
This makes it possible to still run the deliver_scheduled_messages
queue worker, even though we're not creating reminder-bot by default
in new organizations.
This reverts commit 2fa77d9d54.
Further investigation has determined that this did not fix the
password-reset problem described in the previous commit message;
meanwhile, it causes other problems. We still need to track down the
root cause of the original password-reset bug.
See https://github.com/zulip/zulip/issues/10856 for details on the bug
here; but basically, users who reset their password were unable to
login until the next time we flushed memcached. The issue disappeared
after stopping using the Django cached_db session engine, so it's
pretty clear that some sort of bug with that session engine
interacting with our password reset logic is the root cause.
Further debugging is required to understand this fully, but for now,
it seems wise to just disable the backend.
The cost of doing so is a small performance decrease, which is likely
acceptable until we can resolve this (it's certainly a more minor
problem than the "Can't login" bug that disabling this removes).
Some admins setting up Zulip's LDAP auth against Active Directory see
a rather baffling error message: "In order to perform this operation a
successful bind must be completed on the connection". This happens
despite AUTH_LDAP_BIND_DN and auth_ldap_bind_password being set
perfectly correctly, and on a query that the `ldapsearch` command-line
tool performs quite happily.
Empirically, adding a setting like this to /etc/zulip/settings.py
resolves the issue:
AUTH_LDAP_CONNECTION_OPTIONS = {
ldap.OPT_REFERRALS: 0
}
Some useful, concise background on the LDAP "referral" concept is here:
https://docs.oracle.com/javase/jndi/tutorial/ldap/referral/overview.html
and a pertinent bit of docs for the underlying Python `ldap` client:
https://www.python-ldap.org/en/latest/faq.html
and some very helpful documentation for Active Directory:
https://docs.microsoft.com/en-us/windows/desktop/ad/referrals
Based on the docs above, the story appears to be something like this:
* This server has the information for part of the scope of our query
-- in particular it happens to have the information we actually want.
* But there are other areas ("subordinate domains") that our query is
in principle asking about, and this server doesn't know if there are
matches there, so it gives us a referral.
* And by default, python-ldap lets `libldap` run ahead and attempt to
bind to those referrals and do those queries too -- which raises an
error because, unlike Microsoft's "LDAP API", it doesn't reuse the
credentials.
So if we simply skip trying to follow the referrals, there's no
error... and we already have, from the original response, the answer
we actually need. That's what the `ldap.OPT_REFERRALS` option does.
There may be more complex situations where the referral really is
relevant, because the desired user info is split across servers. Even
then, unless an anonymous query will be acceptable, there's no point
in letting `libldap` follow the referral and setting this option is
still the right thing. When someone eventually comes to this bridge,
some code will be required to cross it, by following the referrals.
That code might look a bit like this (unfinished) example:
https://bugs.launchpad.net/nav/+bug/1209178
Manually tested by tabbott.
Fixes#343, which was effectively a report of the need for this
OPT_REFERRALS setting.
Fixes#349, since with this change, we no longer require tricky manual
configuration to get Active Directory up and running.
Fixes part of #10297.
Use FAKE_LDAP_NUM_USERS which specifies the number of LDAP users
instead of FAKE_LDAP_EXTRA_USERS which specified the number of
extra users.
This uses the recently introduced active_mobile_push_notification
flag; messages that have had a mobile push notification sent will have
a removal push notification sent as soon as they are marked as read.
Note that this feature is behind a setting,
SEND_REMOVE_PUSH_NOTIFICATIONS, since the notification format is not
supported by the mobile apps yet, and we want to give a grace period
before we start sending notifications that appear as (null) to
clients. But the tracking logic to maintain the set of message IDs
with an active push notification runs unconditionally.
This is designed with at-least-once semantics; so mobile clients need
to handle the possibility that they receive duplicat requests to
remove a push notification.
We reuse the existing missedmessage_mobile_notifications queue
processor for the work, to avoid materially impacting the latency of
marking messages as read.
Fixes#7459, though we'll need to open a follow-up issue for
using these data on iOS.
This uses the MockLDAP class of fakeldap to fake a ldap server, based
on the approach already used in the tests in `test_auth_backends.py`.
Adds the following settings:
- FAKE_LDAP_MODE: Lets user choose out of three preset configurations.
The default mode if someone erases the entry in settings is 'a'. The
fake ldap server is disable if this option is set to None.
- FAKE_LDAP_EXTRA_USERS: Number of extra users in LDAP directory beyond
the default 8.
Fixes#9934.
That value is necessary to configure anonymous binds in
django-auth-ldap, which are useful when we're using LDAP just to
populate the user database.
Fixes#10257.
This lets us have a slightly cleaner interface for cases where we need
a custom default value than an `or None` in the definition (which
might cause issues with other falsey values).
The autenticate function now follows the signature of
Django 2.0 https://github.com/django-auth-ldap/
django-auth-ldap/commit/27a8052b26f1d3a43cdbcdfc8e7dc0322580adae
Also AUTH_LDAP_CACHE_GROUPS is depricated in favor of
AUTH_LDAP_CACHE_TIMEOUT.
We already had a setting for whether these logs were enabled; now it
also controls which stream the messages go to.
As part of this migration, we disable the feature in dev/production by
default; it's not useful for most environments.
Fixes the proximal data-export issue reported in #10078 (namely, a
stream with nobody ever subscribed to having been created).
This setting isn't intended to exist long term, but instead to make it
possible to merge our search pills code before we're ready to cut over
production environments to use it.
Various pieces of our thumbor-based thumbnailing system were already
merged; this adds the remaining pieces required for it to work:
* a THUMBOR_URL Django setting that controls whether thumbor is
enabled on the Zulip server (and if so, where thumbor is hosted).
* Replaces the overly complicated prototype cryptography logic
* Adds a /thumbnail endpoint (supported both on web and mobile) for
accessing thumbnails in messages, designed to support hosting both
external URLs as well as uploaded files (and applying Zulip's
security model for access to thumbnails of uploaded files).
* Modifies bugdown to, when THUMBOR_URL is set, render images with the
`src` attribute pointing /thumbnail (to provide a small thumbnail
for the image), along with adding a "data-original" attribute that
can be used to access the "original/full" size version of the image.
There are a few things that don't work quite yet:
* The S3 backend support is incomplete and doesn't work yet.
* The error pages for unauthorized access are ugly.
* We might want to rename data-original and /thumbnail?size=original
to use some other name, like "full", that better reflects the fact
that we're potentially not serving the original image URL.
This adds a new settings, SOCIAL_AUTH_SUBDOMAIN, which specifies which
domain should be used for GitHub auth and other python-social-auth
backends.
If one is running a single-realm Zulip server like chat.zulip.org, one
doesn't need to use this setting, but for multi-realm servers using
social auth, this fixes an annoying bug where the session cookie that
python-social-auth sets early in the auth process on the root domain
ends up masking the session cookie that would have been used to
determine a user is logged in. The end result was that logging in
with GitHub on one domain on a multi-realm server like zulipchat.com
would appear to log you out from all the others!
We fix this by moving python-social-auth to a separate subdomain.
Fixes: #9847.
This commit moves all files previously under the 'app' bundle in
the Django pipeline to being compiled by webpack under the 'app'
entry point. In the process, it moves assets under the app entry
to a file called app.js that consumes all relevant css and js files.
This commit also edits the webpack config to be able to expose certain
variables for third party libraries that are currently required by
some modules. This is bad coding form and should be refactored to
requiring whatever dependencies a module may have; we're just
deferring that to the future to simplify the series of transitions we
need to do here. The variable exposure is done using expose-loader in
webpack.
The app/index.html template is edited to override the newly introduced
'commonjs' block in the base template. This is done as a temporary
measure so as not to disrupt other pages on the app during the transition.
It also fixes the value of the 'this' context that was being inferred
as window by third party libraries. This is done using imports-loader
in the webpack config. This is also messy and probably isn't how we
want things to work long term.
Adds search_pill.js to the static asset pipeline. The items
for search pill contain 2 keys, display_value and search_string.
Adding all the operator information i.e the operator, operand and
negated fields along with the search_string and description was tried out.
It was dropped because it didn't provide any advantage as one had to
always calculate the search_string and the description from the operator.
This fixes an important issue where the realm_users cache could grow
beyond 1MB when a Zulip server had more than about 10K users. The
result was that Zulip would start 500ing with that size of userbase.
There are probably better long-term fixes, but because the realm_users
data set caches well, this change should be sufficient to let us
handle to 50-100K users or more on that metric (though at some point,
we'll start having other problems interacting with the realm_users
data set).
This new implementation model is a lot cleaner and should extend
better to the non-oauth backend supported by python-social-auth (since
we're not relying on monkey-patching `do_auth` in the OAuth backend
base class).
This adds a /ping command that will be useful for users
to see what the round trip to the Zulip server is (including
only a tiny bit of actual server time to basically give a
200).
It also introduce the "/zcommand" endpoint and zcommand.js
module.
A "zform" knows how to render data that follows our
schema for widget messages with form elements like
buttons and choices.
This code won't be triggered until a subsequent
server-side commit takes widget_content from
API callers such as the trivial chat bot and
creates submessages for us.
This starts the concept of a schema checker, similar to
zerver/lib/validator.py on the server. We can use this
to validate incoming data. Our server should filter most
of our incoming data, but it's useful to have client-side
checking to defend against things like upgrade
regressions (i.e. what if we change the name of the field
on the server side without updating all client uses).
The only purpose of this commit is to make the django templates
of Two Factor Auth work. We probably won't need this commit once
we upgrade the admin backend of Two Factor Auth to use handlebar
templates.
This commit improves the output that blueslip produces while
showing error stack traces on the front-end. This is done by
using a library called error-stack-parser to format the stack
traces.
This commit also edits the webpack config to use a different
devtool setting since the previous one did not support sourcemaps
within stack traces. It also removes a plugin that was obviated
by this change.
We add conditional infinite sleep to this delivery job as a means to
handle case of multiple servers in service to a realm running this
job. In such a scenerio race conditions might arise leading to
multiple deliveries for same message. This way we try to match the
behaviour of what other jobs do in such a case.
Note: We should eventually do something to make such jobs work
while being running on multiple servers.
Slow queries during backend tests sends messages to Error Bot
which affects the database state causing the tests to fail.
This fixes the occasional flakes due to that.
This commit lays the foundation to handle submessages for
plugin widgets. Right now it just logs events, but subsequent
commits will add widget functionality.
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)
Most of this was straightforward.
Most functions that were grabbed verbatim and whole from
the original class still have one-line wrappers.
Many functions are just-the-data versions of functions that
remain in MessageList: see add, append, prepend, remove as
examples. In a typical pattern the MessageList code becomes
super simple:
prepend: function MessageList_prepend(messages) {
var viewable_messages = this.data.prepend(messages);
this.view.prepend(viewable_messages);
},
Two large functions had some minor surgery:
triage_messages =
top half of add_messages +
API to pass three lists back
change_message_id =
original version +
two simple callbacks to list
For the function update_muting_and_rerender(), we continue
to early-exit if this.muting_enabled is false, and we copied
that same defensive check to the new function
named update_items_for_muting(), even though it's technically
hidden from that codepath by the caller.
This commit moves the stylesheets under the archive bundle in
the Django pipeline to being compiled by webpack instead. It
also removes a remaining call to a portico stylesheet that no
longer exists.
This commit transitions landing-page.css from the Django pipeline
to being compiled by webpack as landing-page.scss under the
'landing-page' and 'integration' bundles.
This commit transitions all styles in app.css in the Django pipeline
to being compiled by webpack in an app-styles bundle, and renames the
various files to now be processed as SCSS.
To implement this transition, we move the old CSS file refernces in
settings.py and replace them with a bundle declared in
`webpack.assets.json` and includedn in the index.html template
Tweaked by tabbott to keep the list of files in `app.css` in
`webpack.assets.json`, and to preserve the ordering from the old
`settings.py`.
This commit removes the need for portico.css to be generated
by the Django pipeline and makes the error page use the css
file compiled by webpack instead.
We haven't seen significant traffic from the legacy desktop app in
over a year, and users using it get a warning to upgrade since last
summer, so it's probably OK to stop providing special fonts for it.
This introduces a generic class called list_cursor to handle the
main details of navigating the buddy list and wires it into
activity.js. It replaces some fairly complicated code that
was coupled to stream_list and used lots of jQuery.
The new code interacts with the buddy_list API instead of jQuery
directly. It also persists the key across redraws, so we don't
lose our place when a focus ping happens or we type more characters.
Note that we no longer cycle to the top when we hit the bottom, or
vice versa. Cycling can be kind of an anti-feature when you want to
just lay on the arrow keys until they hit the end.
The changes to stream_list.js here do not affect the left sidebar;
they only remove code that was used for the right sidebar.
This was a bit more than moving code. I extracted the
following things:
$widget (and three helper methods)
$input
text()
empty()
expand_column
close_widget
activity.clear_highlight
There was a minor bug before this commit, where we were inconsistent
about trimming spaces. The introduction of text() and empty() should
prevent bugs where users type the space bar into search.
static/styles/scss/portico.scss is now compiled by webpack
and supports SCSS syntax.
Changed the server-side templates to render the portico-styles
bundle instead of directly requiring the portico stylesheet. This
allows webpack to handle stylesheet compilation and minification.
We use the mini-css-extract-plugin to extract out css from the
includes in webpack and let webpacks production mode handle
minification. Currently we're not able to use it for dev mode
because it does not support HMR so we use style-loader instead.
Once the plugin supports HMR we can go on to use it for both
dev and prod.
The downside of this is that when reloading pages in the development
environment, there's an annoying flash of unstyled content :(.
It is now possible to make a change in any of the styles included
by static/styles/scss/portico.scss and see the code reload live
in the browser. This is because style-loader which we currently
use has the module.accept code built-in.
This shouldn't have a material performance impact, since we don't
query these except during login, and meanwhile this fixes an issue
where users needed to restart memcached (which usually manifested as
"needing to reboot the whole server" after updating their LDAP
configuration before a user who was migrated from one OU to another
could login).
Fixes#9057.
This is a pretty thin abstraction to prevent having to put
magic numbers in code, doing the which/keyCode hack, and remembering
to all preventDefault.
Hopefully we'll expand it to handle things like shift/alt keys
for components that want their own keyboard handlers (vs. going
through hotkey.js).
We don't indend for this server-level setting to exist in the long
term; the purpose of this is just to make it easy to test this code
path for development purposes.
This implements much of the Message side part of #2745.
This should eliminate the occasional problems that some installations
have had with RabbitMQ trying to load-balance requests between
127.0.0.1 and ::1 (the ipv6 version of localhost).
There are several ways we open help for keyboard shortcuts,
markdown help, and search operators.
- from the gear menu
- from the compose box
- from the search box
- hitting ? for keyboard help
- arrowing/clicking through the tabs
This just moves the relevant code into a module and changes a
bunch of one-line calls in various places.
Now that we have support for displaying custom profile fields, this
adds administrator-level support for creating them.
Tweaked by tabbott to fix a few small bugs and clean up the commit message.
Fixes#1760.
This bot was basically a duplicate of NOTIFICATION_BOT for some
specific corner cases, and didn't add much value. It's better to just
eliminate it, which also removes some ugly corner cases around what
happens if the user account doesn't exist.
In 18e43895ff we replaced
stream subscribe buttons with stream links. The new feature
has been well tested and well received for over a year now,
so it's safe to remove the older feature at this point.
Older sites will have super old messages that still have the
rendered markup; this commit does not attempt to address those
situations. Most likely, clicking on an old button in the old
message will either do nothing or look like a message reply.
This feature isn't really ready yet -- the relevance isn't good, so
the emails aren't a great experience. More work needed; pending that,
just don't send them.
There's already a per-realm setting, which doesn't have a control in
the org settings UI but does suppress it in the per-user settings UI.
Piggyback on that to suppress that UI control when the feature is
disabled at the server level too.
Also cut a comment that hasn't really made sense since the logic was
changed months ago -- the comment originally explained why we sent
digests on Tuesday, Wednesday, and Thursday, and doesn't correspond to
why we dialled back to weekly on Tuesdays.
This is nicer than the "For manual testing ..." comment. :-)
Also as a proper setting we can have it control some logging I
added locally while testing my recent changes to pika logging.
Update perfect-scrollbar to fix stutter space-scrolling in #8544. Also
reworked deprecated `element.perfectScrollbar` to `new
PerfectScrollbar(element)`. Lastly, updated provision version and
changed node module path to new path.
This also refactors perfect-scrollbar in help.js to work with updated
version of perfect-scrollbar. Because the update also changed
perfect-scrollbar's css selectors for all scrollbars in zulip, we
update those too.
Fixes#8544.
In some environments, these exceptions happen regularly on upgrading
Zulip. They're harmless because we reconnect, so avoid complaining
noisily about them.
This applies only on a server open for anyone to create a realm.
Moreover, if the server admins have granted any given realm a
max_invites greater than the default, that realm is exempt too.
This makes this value much easier for a server admin to change than it
was when embedded directly in the code. (Note this entire mechanism
already only applies on a server open for anyone to create a realm.)
Doing this also means getting the default out of the database.
Instead, we make the column nullable, and when it's NULL in the
database, treat that as whatever the current default is. This better
matches anyway the likely model where there are a few realms with
specially-set values, and everything else should be treated uniformly.
The migration contains a `RenameField` step, which sounds scary
operationally -- but it really does mean just the *field*, in
the model within the Python code. The underlying column's name
doesn't change.
This mostly moves code from ui.js.
We change the arguments to `message_fetch.load_more_messages()`
to be `opts` with callbacks for `show_loading` and `hide_loading`.
We also defer starting the scroll handler until `message_fetch.js`
has been initialized.
@brockwhittaker wrote the original prototype for having
pills in the recipient box when users compose PMs (either
1:1 or huddle). The prototype was test deloyed on our
main realm for several weeks.
This commit includes all the original CSS and HTML from
the prototype.
After some things changed with the codebase after the initial
test deployment, I made the following changes:
* In prior commits I refactored out a module called
`user_pill.js` that implemented some common functions
against a more streamlined version of `input_pill.js`,
and this commit largely integrates with that.
* I made changes in a prior commit to handle Zephyr
semantics (emails don't get validated) and tested
this commit with zephyr.
* I fixed a reload bug by extracting code out to
`compose_pm_pill.js` and re-ordering some
calls to `initialize`.
There are still two flaws related to un-pill-ified text in the
input:
* We could be more aggressive about trying to pill-ify
emails when you blur or tab away.
* We only look at the pills when you send the message,
instead of complaining about the un-pill-ified text.
(Some folks may consider that a feature, but it's
probably surprising to others.)
The main point of this change is to streamline the core
code for input pills, and we use also modify user groups.
The main change to input_pill.js is that you now
configure a function called `create_item_from_text`, and
that can return an arbitrary object, and it just needs
a field called `display_value`.
Other changes:
* You now call `input.create(opts)` to create the
widget.
* There is no longer a cache, because we can
write smarter code in typeahead `source` functions
that exclude ids up front.
* There is no value/optinalKey complexity, because
the calling code can supply arbitrary objects and
do their own external data management on the pill
items.
* We eliminate `prependPill`.
* We eliminate `data`, `keys`, and `values`, and just
have `items`.
We now isolate the code to transmit messages into transmit.js.
It is stable code that most folks doing UI work in compose.js don't
care about the details of, so it's just clutter there. Also, we may
soon have other widgets than the compose box that send messages.
This change mostly preserves test coverage, although in some cases
we stub at a higher level for the compose path (this is a good thing).
Extracting out transmit.js allows us to lock down 100% coverage on that
file.
From here on we start to authenticate uploaded file request before
serving this files in production. This involves allowing NGINX to
pass on these file requests to Django for authentication and then
serve these files by making use on internal redirect requests having
x-accel-redirect field. The redirection on requests and loading
of x-accel-redirect param is handled by django-sendfile.
NOTE: This commit starts to authenticate these requests for Zulip
servers running platforms either Ubuntu Xenial (16.04) or above.
Fixes: #320 and #291 partially.
It's too easy to go over the rate limits when using the webapp.
The correct fix for this probably involves some changes to which
routes get covered by what sort of rate limit, but for now, just
increase the limits.
The original code made a 3/4-hearted effort to generically accommodate
more banners/"panels" later, but named itself after the first one made.
[greg: expanded commit message.]
For now, this does nothing in a production environment, but it should
simplify the process of doing testing on the Thumbor implementation,
by integrating a lot of dependency management logic.
Gmail is a bad example for outbound email; use a generic example.
Also leave the `= None` default out of the config file, as it's
redundant with DEFAULT_SETTINGS in our internal settings.py ; and
explain in the latter why we don't mention the other SMTP settings.
Since we need KaTeX to be available for zerver/lib/tex.py and
static/third/katex/cli.js to be able to shell out to it. However, for
some reason, the KaTeX we bundle using Webpack doesn't seem to be
importable by Node (and it's also kinda a pain to find its filename
from `cli.js`).
So, we work around this by just using the legacy system for KaTeX.
Something similar is needed for zxcvbn.js, in order to support the
settings_account.js use case (basically deferred loading of this
file); that requires JS code to have access to the correct path for
zxcvbn.
Stripe Checkout means using JS code provided by Stripe to handle
almost all of the UI, which is great for us.
There are more features we should add to this page and changes we
should make, but this gives us an MVP.
[greg: expanded commit message; fixed import ordering and some types.]
There are two different things you need to patch in order to get error
emails (at `/emails`) in dev. Flip one of them in dev all the time,
and make the comment on the other a bit more explicit.
This name hasn't been right since f7f2ec0ac back in 2013; this handler
sends the log record to a queue, whose consumer will not only maybe
send a Zulip message but definitely send an email. I found this
pretty confusing when I first worked on this logging code and was
looking for how exception emails got sent; so now that I see exactly
what's actually happening here, fix it.
Because calls to `create_logger` generally run after settings are
configured, these would override what we have in `settings.LOGGING` --
which in particular defeated any attempt to set log levels in
`test_settings.py`. Move all of these settings to the same place in
`settings.py`, so they can be overridden in a uniform way.
This adds custom CSS through JavaScript for things that do not
scope well and will override other inherited styles.
This should ONLY be used for problematic CSS that has no obvious
or easy CSS-only solution.
(Specifically, we need this for the "default link" styling, which is
hard to override because we don't want to start winning ties due to
specificity that we would not have won in the light theme).
[Modified by greg to (1) keep `USERNAME_FIELD = 'email'`,
(2) silence the corresponding system check, and (3) ban
reusing a system bot's email address, just like we do in
realm creation.]
Originally this used signals, namely SIGRTMIN. But in prod, the
signal handler never fired; I debugged fruitlessly for a while, and
suspect uwsgi was foiling it in a mysterious way (which is kind of
the only way uwsgi does anything.)
So, we listen on a socket. Bit more code, and a bit trickier to
invoke, but it works.
This was developed for the investigation of memory-bloating on
chat.zulip.org that led to a331b4f64 "Optimize query_all_subs_by_stream()".
For usage instructions, see docstring.
Tweaked by tabbott to move changes from the next commit that are
required for this to pass tests into this commit.
Note that this exports a few items that were not previously exported.
This fixes some subtle JavaScript exceptions we've been getting in
zulipchat.com, caused by the system bot realm there not being "zulip"
interacting with get_cross_realm_users.
This uses the to-markdown.js library to do all the hard work of
parsing HTML and turning it into markdown and not e.g. uploaded files.
Tweaked by tabbott to better scope when it activates to just include
pastes of HTML content.
Fixes#5853.
Storage limititations are only set on the value of
a config entry, since this is the only user-accessible
part of the schema. Keys are statically set by each
embedded bot.
Note from tabbott: While this initial version is experimental and
definitely incomplete, we expect to have a solid version done over the
next few weeks (after more refactoring). We're merging this now to
make it easy to test both versions when refactoring our CSS.
Fixes#267.