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See https://github.com/matrix-org/synapse/pull/14095#discussion_r990335492
This is useful because when see that a relevant event is an `outlier` or `soft-failed`, then that's a good unexpected indicator explaining why it's not showing up. `filter_events_for_client` is used in `/sync`, `/messages`, `/context` which are all common end-to-end assertion touch points (also notifications, relations).
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* Tweak docstring and type hint
* Flip logic and provide better name
* Separate decision from action
* Track a set of strings, not EventBases
* Require explicit boolean options from callers
* Add explicit option for partial state rooms
* Changelog
* Rename param
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* Move `StateFilter` to `synapse.types`
* Changelog
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state (#14404)
Signed-off-by: Mathieu Velten <mathieuv@matrix.org>
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Spawned while investigating https://github.com/matrix-org/synapse/issues/13944
This way we might get some more context whenever an `403 Forbidden - body: {"errcode":"M_FORBIDDEN","error":"You don't have permission to access that event."}` error is produced.
`log_config.yaml`
```yaml
loggers:
synapse:
level: INFO
synapse.visibility:
level: DEBUG
```
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Add some miscellaneous comments to document sync, especially around
`compute_state_delta`.
Signed-off-by: Sean Quah <seanq@matrix.org>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
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In Jaeger:
- Before: huge list of uncategorized database calls
- After: nice and collapsible into units of work
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event (#12905)
Currently, we try to pull the event corresponding to a sync token from the database. However, when
we fetch redaction events, we check the target of that redaction (because we aren't allowed to send
redactions to clients without validating them). So, if the sync token points to a redaction of an event
that we don't have, we have a problem.
It turns out we don't really need that event, and can just work with its ID and metadata, which
sidesteps the whole problem.
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(#12611)
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
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Try to avoid an OOM by checking fewer extremities.
Generally this is a big rewrite of _maybe_backfill, to try and fix some of the TODOs and other problems in it. It's best reviewed commit-by-commit.
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The intention here is to avoid doing state lookups for outliers in
`/_matrix/federation/v1/event`. Unfortunately that's expanded into something of
a rewrite of `filter_events_for_server`, which ended up trying to do that
operation in a couple of places.
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Instead of fetching the raw account data and re-parsing it. The
ignored_users table is a denormalised version of the account data
for quick searching.
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Avoid trying to get the state for outliers, which isn't a sensible thing to do.
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whose key is prefixed with the user ID (#11788)
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This PR is tantamount to running
```
pyupgrade --py36-plus --keep-percent-format `find synapse/ -type f -name "*.py"`
```
Part of #9744
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Part of #9744
Removes all redundant `# -*- coding: utf-8 -*-` lines from files, as python 3 automatically reads source code as utf-8 now.
`Signed-off-by: Jonathan de Jong <jonathan@automatia.nl>`
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New API /_synapse/admin/rooms/{roomId}/context/{eventId}
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Signed-off-by: David Teller <davidt@element.io>
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If we see stale extremities while persisting events, and notice that
they don't change the result of state resolution, we drop them.
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This fixes a bug where `m.ignored_user_list` was assumed to be a dict,
leading to odd behavior for users who set it to something else.
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visibility
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Ensure good comprehension hygiene using flake8-comprehensions.
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(#6878)
We're in the middle of properly mitigating spam caused by malicious aliases being added to a room. However, until this work fully lands, we temporarily filter out all m.room.aliases events from /sync and /messages on the CS API, to remove abusive aliases. This is considered acceptable as m.room.aliases events were never a reliable record of the given alias->id mapping and were purely informational, and in their current state do more harm than good.
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Purge jobs don't delete the latest event in a room in order to keep the forward extremity and not break the room. On the other hand, get_state_events, when given an at_token argument calls filter_events_for_client to know if the user can see the event that matches that (sync) token. That function uses the retention policies of the events it's given to filter out those that are too old from a client's view.
Some clients, such as Riot, when loading a room, request the list of members for the latest sync token it knows about, and get confused to the point of refusing to send any message if the server tells it that it can't get that information. This can happen very easily with the message retention feature turned on and a room with low activity so that the last event sent becomes too old according to the room's retention policy.
An easy and clean fix for that issue is to discard the room's retention policies when retrieving state.
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As per MSC1763, 'Retention is only considered for non-state events.', so don't filter out state events based on the room's retention policy.
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When filtering events to send to server we check more than just history
visibility. However when deciding whether to backfill or not we only
care about the history visibility.
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Currently when fetching state groups from the data store we make two
hits two the database: once for members and once for non-members (unless
request is filtered to one or the other). This adds needless load to the
datbase, so this PR refactors the lookup to make only a single database
hit.
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We're better off hashing just the event_id than the whole ((type, state_key),
event_id) tuple - so use a dict instead of a set.
Also, iteritems > items.
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Fixes #3550
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for easier unit testing.
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matrix-org/rav/erasure_visibility""
This reverts commit 1d009013b3c3e814177afc59f066e02a202b21cd.
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This reverts commit ce0d911156b355c5bf452120bfb08653dad96497, reversing
changes made to b4a5d767a94f1680d07edfd583aae54ce422573e.
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Redact any messges sent by erased users.
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This is only used by filter_events_for_client, so we can simplify the whole
thing by just doing one user at a time, and removing a dead storage function to
boot.
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Both of these functions ae known to leak logcontexts. Replace the remaining
calls to them and kill them off.
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We know the users are joined and we can explicitly check for if they are
ignoring the user, so lets do that.
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This reverts commit 421fdf74609439edaaffce117436e6a6df147841.
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Always allow the user to see their own leave events, otherwise
they won't see the event if they reject an invite for a room whose
history visibility is set such that they cannot see events before
joining.
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