Fixes#13504.
This commit is purely an improvement in error handling.
We used to not do any validation on keys before passing them to
memcached, which meant for invalid keys, memcached's own key
validation would throw an exception. Unfortunately, the resulting
error messages are super hard to read; the traceback structure doesn't
even show where the call into memcached happened.
In this commit we add validation to all the basic cache_* functions, and
appropriate handling in their callers.
We also add a lot of tests for the new behavior, which has the nice
effect of giving us decent coverage of all these core caching
functions which previously had been primarily tested manually.
The user information in display_recipient in cached message_dicts
becomes outdated if the information is changed in any way.
In particular, since we don't have a way to find all the message
objects that might contain PMs after an organization toggles the
setting to hide user email addresses from other users, we had a
situation where client might see inaccurate cached data from before
the transition for a period of up to hours.
We address this by using our generic_bulk_cached_fetch toolchain to
ensure we always are fetching display_recipient data from the database
(and/or a special recipient_id -> display_recipient cache, which we
can flush easily).
Fixes#12818.
The typing for generic_bulk_cached_fetch is complicated, and was
recorded incorrectly previously for the case where a cache_transformer
function is required. We fix this by adding the new CacheItemT, and
additionally add comments explaining what's going on with these types
for future reference.
Thanks to Mateusz Mandera for raising this issue.
In the unlikely event that someone edited the properties of a system
bot and then saved the result, we were still caching the old version
indefinitely in the get_system_bot cache.
This led to a confusing case where a newly installed Zulip server
didn't have is_api_super_user properly set on its EMAIL_GATEWAY_BOT in
memcached.
Co-authored-by: Mateusz Mandera <mateusz.mandera@protonmail.com>
Modifies the dict with the user info to include the key `bot_owner_id`
so it can be displayed in the user info popover.
Tests concerned with changing bot owner have been modified to have
number of events=2 because while updating the bot info, two events
are fired -- updating the `realm_bot` and `realm_user` since the
key `bot_owner_id` is a part of realm user info.
Calls to `render_markdown_path` weren't getting cached since the context
argument is unhashable, and the `ignore_unhashable_lru_cache` decorator ignores
such calls. This commit adds a couple of more decorators - one which converts
dict arguments to the function to a dict items tuple, and another which converts
dict items tuple arguments back to dicts. These two decorators used along with
the `ignore_unhashable_lru_cache` decorator ensure that the calls to
`render_markdown_path` with the context dict argument are also cached.
The time to run zerver.tests.test_urls.PublicURLTest.test_public_urls drops by
about 50% from 8.4s to 4.1s with this commit. The time to run
zerver.tests.test_docs.DocPageTest.test_doc_endpoints drops by about 20% from
3.2s to 2.5s.
Previously, these cache keys looked like:
:1:9c26164d3a393e316e0f8210efe270e08710d45astream_by_realm_and_name:...
Now, they look like this:
:1:9c26164d3a393e316e0f8210efe270e08710d45a:stream_by_realm_and_name:...
This commit leverages the ahocorasick algorithm to build a set of user_ids
that have their alert_words present in the message. It runs in linear time
of the order of length of the input message as opposed to number of
alert_words. This is after building a ahocorasick Automaton which runs
in O(number of alert_words in entire realm) which is usually cached.
Refactor the potentially expensive work done by Beautiful Soup into a
function that is called by the alter_content function, so that we can
cache the result. Saves a significant portion of the runtime of
loading of all of our /help/ and /api/ documentation pages (e.g. 12ms
for /api).
Fixes#11088.
Tweaked by tabbott to use the URL path as the cache key, clean up
argument structure, and use a clearer name for the function.
A key part of this is the new helper, get_user_by_delivery_email. Its
verbose name is important for clarity; it should help avoid blind
copy-pasting of get_user (which we'll also want to rename).
Unfortunately, it requires detailed understanding of the context to
figure out which one to use; each is used in about half of call sites.
Another important note is that this PR doesn't migrate get_user calls
in the tests except where not doing so would cause the tests to fail.
This probably deserves a follow-up refactor to avoid bugs here.
This is initial work, which will help us establish habits of using a
well-tested approach for renaming a Zulip organization (since as part
of https://github.com/zulip/zulip-mobile/issues/3142, we'll likely
need to make this function do more).
This supports guest user in the user-info-form-modal as well as in the
role section of the admin-user-table.
With some fixes by Tim Abbott and Shubham Dhama.
We don't want really long urls to lead to truncated
keys, or we could theoretically have two different
urls get mixed up previews.
Also, this suppresses warnings about exceeding the
250 char limit.
Finally, this gives the key a proper prefix.
Now reading API keys from a user is done with the get_api_key wrapper
method, rather than directly fetching it from the user object.
Also, every place where an action should be done for each API key is now
using get_all_api_keys. This method returns for the moment a single-item
list, containing the specified user's API key.
This commit is the first step towards allowing users have multiple API
keys.
We solved the problem the TODO raised by using a different type
annotation syntax, and I'm not sure whether that refactor would
actually improve the code.
This is a wrapper over lru_cache function. It adds following features on
top of lru_cache:
* It will not cache result of functions with unhashable arguments.
* It will clear cache whenever zerver.lib.cache.KEY_PREFIX changes.
The previous implementation had a subtle caching bug: because it was
sharing its cache with the `get_user_profile_by_email` cache, if a
user happened to have an email in that cache, we'd return it, even
though that user didn't match `base_query`.
This causes `get_cross_realm_users` to no longer have a problematic
caching bug.
Along with fixing some minor bugs, this requires extracting out the
default functions so that we can do type: ignores on them properly.
While we're at it, we switch to the Python 3 syntax.
Mateusz Mandera
Hemanth V. Alluri
Pragati Agrawal
Rishi Gupta
Tim Abbott
Wyatt Hoodes
Vaibhav
Puneeth Chaganti
Anders Kaseorg
Vishnu Ks
Bennet Sunder
Anders Kaseorg
Steve Howell
Yago González
Shubham Dhama
Aditya Bansal
neiljp (Neil Pilgrim)
Umair Khan
rht