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Add MSC3030 experimental client and federation API endpoints to get the closest event to a given timestamp (#9445)

Browse source 
MSC3030: https://github.com/matrix-org/matrix-doc/pull/3030

Client API endpoint. This will also go and fetch from the federation API endpoint if unable to find an event locally or we found an extremity with possibly a closer event we don't know about.
```
GET /_matrix/client/unstable/org.matrix.msc3030/rooms/<roomID>/timestamp_to_event?ts=<timestamp>&dir=<direction>
{
    "event_id": ...
    "origin_server_ts": ...
}
```

Federation API endpoint:
```
GET /_matrix/federation/unstable/org.matrix.msc3030/timestamp_to_event/<roomID>?ts=<timestamp>&dir=<direction>
{
    "event_id": ...
    "origin_server_ts": ...
}
```

Co-authored-by: Erik Johnston <erik@matrix.org>
This commit is contained in:
Eric Eastwood 2021-12-02 01:02:20 -06:00 • committed by GitHub
parent 84dc50e160
commit a6f1a3abec
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13 changed files with 674 additions and 31 deletions
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58
synapse/rest/client/room.py
View file

@ -1070,6 +1070,62 @@ def register_txn_path(
)
class TimestampLookupRestServlet(RestServlet):
"""
API endpoint to fetch the `event_id` of the closest event to the given
timestamp (`ts` query parameter) in the given direction (`dir` query
parameter).
Useful for cases like jump to date so you can start paginating messages from
a given date in the archive.
`ts` is a timestamp in milliseconds where we will find the closest event in
the given direction.
`dir` can be `f` or `b` to indicate forwards and backwards in time from the
given timestamp.
GET /_matrix/client/unstable/org.matrix.msc3030/rooms/<roomID>/timestamp_to_event?ts=<timestamp>&dir=<direction>
{
"event_id": ...
}
"""
PATTERNS = (
re.compile(
"^/_matrix/client/unstable/org.matrix.msc3030"
"/rooms/(?P<room_id>[^/]*)/timestamp_to_event$"
),
)
def __init__(self, hs: "HomeServer"):
super().__init__()
self._auth = hs.get_auth()
self._store = hs.get_datastore()
self.timestamp_lookup_handler = hs.get_timestamp_lookup_handler()
async def on_GET(
self, request: SynapseRequest, room_id: str
) -> Tuple[int, JsonDict]:
requester = await self._auth.get_user_by_req(request)
await self._auth.check_user_in_room(room_id, requester.user.to_string())
timestamp = parse_integer(request, "ts", required=True)
direction = parse_string(request, "dir", default="f", allowed_values=["f", "b"])
(
event_id,
origin_server_ts,
) = await self.timestamp_lookup_handler.get_event_for_timestamp(
requester, room_id, timestamp, direction
)
return 200, {
"event_id": event_id,
"origin_server_ts": origin_server_ts,
}
class RoomSpaceSummaryRestServlet(RestServlet):
PATTERNS = (
re.compile(
@ -1239,6 +1295,8 @@ def register_servlets(
RoomAliasListServlet(hs).register(http_server)
SearchRestServlet(hs).register(http_server)
RoomCreateRestServlet(hs).register(http_server)
if hs.config.experimental.msc3030_enabled:
TimestampLookupRestServlet(hs).register(http_server)
# Some servlets only get registered for the main process.
if not is_worker: