We do not use `get_link_embed_data` for messsages sent by
bots, as bots often repeat the same URL over and over again
and are generally either text-focused or have their own
mechanisms to provide preview content.
Fixes#2968.
(The commit q7ef4e40258280e202325c9295579c93fb948b replaced
data-user-email with data-user-id, but we still need to
support data-user-email for old clients like non-updated
androids and we still want to start the migration forward
to data-user-id.)
The goal of this library is to make it a lot easier to prevent bugs
like CVE-2017-0881 by having all of our views logic for fetching a
stream go through a couple carefully tested code paths.
This fixes a regression introduced by our migration to track
subscribers for all public streams, where now users who are added to
an invite-only stream were receiving a mark_subscribed event
for a stream their browser didn't know existed, causing an exception.
To fix this, we now send a stream create event to the browser just
before the user receives the notification that it was added to the
invite-only stream.
It turns out we were using malformed URLs in the image tags
(containing just a hostname, but no http(s)!) in what we were passing
to the Django templates for our digest/, which resulted in the Django
templates treating these URLs as http. Gmail recently cracked down on
loading images in HTTP, causing the emoji links to appear broken in
emails Zulip sends.
Fixes#3258.
This old helper has for years been used only by populate_db, and got
buggy (as of a recent refactoring). So we just call do_send_messages
directly instead.
Fixes the provisioning error we currently get in Travis CI.
This is a pretty minor change, but it makes it clear that we
have user_id in all the relevant states/events, so we might as
well use that for the check, since email is mutable and
slightly more difficult to reason about.