This was correctly handled for the "fallback" case where the background
updates hadn't finished
---------
Co-authored-by: Eric Eastwood <erice@element.io>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andrew Morgan <andrew@amorgan.xyz>
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
This PR makes a few radical changes to media. This now stores the SHA256
hash of each file stored in the database (excluding thumbnails, more on
that later). If a set of media is quarantined, any additional uploads of
the same file contents or any other files with the same hash will be
quarantined at the same time.
Currently this does NOT:
- De-duplicate media, although a future extension could be to do that.
- Run any background jobs to identify the hashes of older files. This
could also be a future extension, though the value of doing so is
limited to combat the abuse of recent media.
- Hash thumbnails. It's assumed that thumbnails are parented to some
form of media, so you'd likely be wanting to quarantine the media and
the thumbnail at the same time.
We do a few things in this PR to better support caching:
1. Change `Cache-Control` header to allow intermediary proxies to cache
media *only* if they revalidate on every request. This means that the
intermediary cache will still send the request to Synapse but with a
`If-None-Match` header, at which point Synapse can check auth and
respond with a 304 and empty content.
2. Add `ETag` response header to all media responses. We hardcode this
to `1` since all media is immutable (beyond being deleted).
3. Check for `If-None-Match` header (after checking for auth), and if it
matches then respond with a 304 and empty body.
---------
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
MSC4108 relies on ETag to determine if something has changed on the
rendez-vous channel.
Strong and correct ETag comparison works if the response body is
bit-for-bit identical, which isn't the case if a proxy in the middle
compresses the response on the fly.
This adds a `no-transform` directive to the `Cache-Control` header,
which tells proxies not to transform the response body.
Additionally, some proxies (nginx) will switch to `Transfer-Encoding:
chunked` if it doesn't know the Content-Length of the response, and
'weakening' the ETag if that's the case. I've added `Content-Length`
headers to all responses, to hopefully solve that.
This basically fixes QR-code login when nginx or cloudflare is involved,
with gzip/zstd/deflate compression enabled.
Some small cleanups after Python3.8 became EOL.
- Move some type imports from `typing_extensions` to `typing`
- Remove the `abi3-py38` feature from pyo3
### Pull Request Checklist
<!-- Please read
https://element-hq.github.io/synapse/latest/development/contributing_guide.html
before submitting your pull request -->
* [x] Pull request is based on the develop branch
* [x] Pull request includes a [changelog
file](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#changelog).
The entry should:
- Be a short description of your change which makes sense to users.
"Fixed a bug that prevented receiving messages from other servers."
instead of "Moved X method from `EventStore` to `EventWorkerStore`.".
- Use markdown where necessary, mostly for `code blocks`.
- End with either a period (.) or an exclamation mark (!).
- Start with a capital letter.
- Feel free to credit yourself, by adding a sentence "Contributed by
@github_username." or "Contributed by [Your Name]." to the end of the
entry.
* [x] [Code
style](https://element-hq.github.io/synapse/latest/code_style.html) is
correct
(run the
[linters](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-linters))
---------
Co-authored-by: Quentin Gliech <quenting@element.io>
Regressed as part of https://github.com/element-hq/synapse/pull/18107
This does two things:
1. Only check if the state groups have been deleted when calculating the
event context (as that's when we will insert them). This avoids lots of
checks for read operations.
2. Don't lock the `state_groups` rows when doing the check. This adds
overhead, and it doesn't prevent any races.
Currently we don't really have anything that stops us from deleting
state groups when an in-flight event references it. This is a fairly
rare race currently, but we want to be able to more aggressively delete
state groups so it is important to address this to ensure that the
database remains valid.
This implements the locking, but doesn't actually use it.
See the class docstring of the new data store for an explanation for how
this works.
---------
Co-authored-by: Devon Hudson <devon.dmytro@gmail.com>
This also happens for rejecting an invite. Basically, any out-of-band membership transition where we first get the membership as an `outlier` and then rely on federation filling us in to de-outlier it.
This PR mainly addresses automated test flakiness, bots/scripts, and options within Synapse like [`auto_accept_invites`](https://element-hq.github.io/synapse/v1.122/usage/configuration/config_documentation.html#auto_accept_invites) that are able to react quickly (before federation is able to push us events), but also helps in generic scenarios where federation is lagging.
I initially thought this might be a Synapse consistency issue (see issues labeled with [`Z-Read-After-Write`](https://github.com/matrix-org/synapse/labels/Z-Read-After-Write)) but it seems to be an event auth logic problem. Workers probably do increase the number of possible race condition scenarios that make this visible though (replication and cache invalidation lag).
Fix https://github.com/element-hq/synapse/issues/15012
(probably fixes https://github.com/matrix-org/synapse/issues/15012 (https://github.com/element-hq/synapse/issues/15012))
Related to https://github.com/matrix-org/matrix-spec/issues/2062
Problems:
1. We don't consider [out-of-band membership](https://github.com/element-hq/synapse/blob/develop/docs/development/room-dag-concepts.md#out-of-band-membership-events) (outliers) in our `event_auth` logic even though we expose them in `/sync`.
1. (This PR doesn't address this point) Perhaps we should consider authing events in the persistence queue as events already in the queue could allow subsequent events to be allowed (events come through many channels: federation transaction, remote invite, remote join, local send). But this doesn't save us in the case where the event is more delayed over federation.
### What happened before?
I wrote some Complement test that stresses this exact scenario and reproduces the problem: https://github.com/matrix-org/complement/pull/757
```
COMPLEMENT_ALWAYS_PRINT_SERVER_LOGS=1 COMPLEMENT_DIR=../complement ./scripts-dev/complement.sh -run TestSynapseConsistency
```
We have `hs1` and `hs2` running in monolith mode (no workers):
1. `@charlie1:hs2` is invited and joins the room:
1. `hs1` invites `@charlie1:hs2` to a room which we receive on `hs2` as `PUT /_matrix/federation/v1/invite/{roomId}/{eventId}` (`on_invite_request(...)`) and the invite membership is persisted as an outlier. The `room_memberships` and `local_current_membership` database tables are also updated which means they are visible down `/sync` at this point.
1. `@charlie1:hs2` decides to join because it saw the invite down `/sync`. Because `hs2` is not yet in the room, this happens as a remote join `make_join`/`send_join` which comes back with all of the auth events needed to auth successfully and now `@charlie1:hs2` is successfully joined to the room.
1. `@charlie2:hs2` is invited and and tries to join the room:
1. `hs1` invites `@charlie2:hs2` to the room which we receive on `hs2` as `PUT /_matrix/federation/v1/invite/{roomId}/{eventId}` (`on_invite_request(...)`) and the invite membership is persisted as an outlier. The `room_memberships` and `local_current_membership` database tables are also updated which means they are visible down `/sync` at this point.
1. Because `hs2` is already participating in the room, we also see the invite come over federation in a transaction and we start processing it (not done yet, see below)
1. `@charlie2:hs2` decides to join because it saw the invite down `/sync`. Because `hs2`, is already in the room, this happens as a local join but we deny the event because our `event_auth` logic thinks that we have no membership in the room ❌ (expected to be able to join because we saw the invite down `/sync`)
1. We finally finish processing the `@charlie2:hs2` invite event from and de-outlier it.
- If this finished before we tried to join we would have been fine but this is the race condition that makes this situation visible.
Logs for `hs2`:
```
🗳️ on_invite_request: handling event <FrozenEventV3 event_id=$PRPCvdXdcqyjdUKP_NxGF2CcukmwOaoK0ZR1WiVOZVk, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=invite, outlier=False>
🔦 _store_room_members_txn update room_memberships: <FrozenEventV3 event_id=$PRPCvdXdcqyjdUKP_NxGF2CcukmwOaoK0ZR1WiVOZVk, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=invite, outlier=True>
🔦 _store_room_members_txn update local_current_membership: <FrozenEventV3 event_id=$PRPCvdXdcqyjdUKP_NxGF2CcukmwOaoK0ZR1WiVOZVk, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=invite, outlier=True>
📨 Notifying about new event <FrozenEventV3 event_id=$PRPCvdXdcqyjdUKP_NxGF2CcukmwOaoK0ZR1WiVOZVk, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=invite, outlier=True>
✅ on_invite_request: handled event <FrozenEventV3 event_id=$PRPCvdXdcqyjdUKP_NxGF2CcukmwOaoK0ZR1WiVOZVk, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=invite, outlier=True>
🧲 do_invite_join for @user-2-charlie1:hs2 in !sfZVBdLUezpPWetrol:hs1
🔦 _store_room_members_txn update room_memberships: <FrozenEventV3 event_id=$bwv8LxFnqfpsw_rhR7OrTjtz09gaJ23MqstKOcs7ygA, type=m.room.member, state_key=@user-1-alice:hs1, membership=join, outlier=True>
🔦 _store_room_members_txn update room_memberships: <FrozenEventV3 event_id=$oju1ts3G3pz5O62IesrxX5is4LxAwU3WPr4xvid5ijI, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=join, outlier=False>
📨 Notifying about new event <FrozenEventV3 event_id=$oju1ts3G3pz5O62IesrxX5is4LxAwU3WPr4xvid5ijI, type=m.room.member, state_key=@user-2-charlie1:hs2, membership=join, outlier=False>
...
🗳️ on_invite_request: handling event <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=False>
🔦 _store_room_members_txn update room_memberships: <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=True>
🔦 _store_room_members_txn update local_current_membership: <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=True>
📨 Notifying about new event <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=True>
✅ on_invite_request: handled event <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=True>
📬 handling received PDU in room !sfZVBdLUezpPWetrol:hs1: <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=False>
📮 handle_new_client_event: handling <FrozenEventV3 event_id=$WNVDTQrxy5tCdPQHMyHyIn7tE4NWqKsZ8Bn8R4WbBSA, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=join, outlier=False>
❌ Denying new event <FrozenEventV3 event_id=$WNVDTQrxy5tCdPQHMyHyIn7tE4NWqKsZ8Bn8R4WbBSA, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=join, outlier=False> because 403: You are not invited to this room.
synapse.http.server - 130 - INFO - POST-16 - <SynapseRequest at 0x7f460c91fbf0 method='POST' uri='/_matrix/client/v3/join/%21sfZVBdLUezpPWetrol:hs1?server_name=hs1' clientproto='HTTP/1.0' site='8080'> SynapseError: 403 - You are not invited to this room.
📨 Notifying about new event <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=False>
✅ handled received PDU in room !sfZVBdLUezpPWetrol:hs1: <FrozenEventV3 event_id=$O_54j7O--6xMsegY5EVZ9SA-mI4_iHJOIoRwYyeWIPY, type=m.room.member, state_key=@user-3-charlie2:hs2, membership=invite, outlier=False>
```
This is particularly a problem in a state reset scenario where the membership
might change without a corresponding event.
This PR is targeting a scenario where a state reset happens which causes
room membership to change. Previously, the cache would just hold onto
stale data and now we properly bust the cache in this scenario.
We have a few tests for these scenarios which you can see are now fixed
because we can remove the `FIXME` where we were previously manually
busting the cache in the test itself.
This is a general Synapse thing so by it's nature it helps out Sliding
Sync.
Fix https://github.com/element-hq/synapse/issues/17368
Prerequisite for https://github.com/element-hq/synapse/issues/17929
---
Match when are busting `_curr_state_delta_stream_cache`
Adds a query param `type` to `/_synapse/admin/v1/rooms/{room_id}/state`
that filters the state event query by state event type.
---------
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
- Fetch the number of invites the provided user has sent after a given
timestamp
- Fetch the number of rooms the provided user has joined after a given
timestamp, regardless if they have left/been banned from the rooms
subsequently
- Get report IDs of event reports where the provided user was the sender
of the reported event
This is an implementation of MSC4190, which allows appservices to manage
their user's devices without /login & /logout.
---------
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
Fixes#17823
While we're at it, makes a change where the redactions are sent as the
admin if the user is not a member of the server (otherwise these fail
with a "User must be our own" message).
