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Merge pull request #6517 from matrix-org/rav/event_auth/13

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Port some of FederationHandler to async/await
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Richard van der Hoff 2019-12-11 16:36:06 +00:00 committed by GitHub
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4 changed files with 98 additions and 103 deletions
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1
changelog.d/6517.misc Normal file
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@ -0,0 +1 @@
Port some of FederationHandler to async/await.

155
synapse/handlers/federation.py
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@ -19,7 +19,7 @@
import itertools
import logging
from typing import Dict, Iterable, Optional, Sequence, Tuple
from typing import Dict, Iterable, List, Optional, Sequence, Tuple
import six
from six import iteritems, itervalues
@ -165,8 +165,7 @@ class FederationHandler(BaseHandler):
self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages
@defer.inlineCallbacks
def on_receive_pdu(self, origin, pdu, sent_to_us_directly=False):
async def on_receive_pdu(self, origin, pdu, sent_to_us_directly=False) -> None:
""" Process a PDU received via a federation /send/ transaction, or
via backfill of missing prev_events
@ -176,8 +175,6 @@ class FederationHandler(BaseHandler):
pdu (FrozenEvent): received PDU
sent_to_us_directly (bool): True if this event was pushed to us; False if
we pulled it as the result of a missing prev_event.
Returns (Deferred): completes with None
"""
room_id = pdu.room_id
@ -186,7 +183,7 @@ class FederationHandler(BaseHandler):
logger.info("handling received PDU: %s", pdu)
# We reprocess pdus when we have seen them only as outliers
existing = yield self.store.get_event(
existing = await self.store.get_event(
event_id, allow_none=True, allow_rejected=True
)
@ -230,7 +227,7 @@ class FederationHandler(BaseHandler):
#
# Note that if we were never in the room then we would have already
# dropped the event, since we wouldn't know the room version.
is_in_room = yield self.auth.check_host_in_room(room_id, self.server_name)
is_in_room = await self.auth.check_host_in_room(room_id, self.server_name)
if not is_in_room:
logger.info(
"[%s %s] Ignoring PDU from %s as we're not in the room",
@ -246,12 +243,12 @@ class FederationHandler(BaseHandler):
# Get missing pdus if necessary.
if not pdu.internal_metadata.is_outlier():
# We only backfill backwards to the min depth.
min_depth = yield self.get_min_depth_for_context(pdu.room_id)
min_depth = await self.get_min_depth_for_context(pdu.room_id)
logger.debug("[%s %s] min_depth: %d", room_id, event_id, min_depth)
prevs = set(pdu.prev_event_ids())
seen = yield self.store.have_seen_events(prevs)
seen = await self.store.have_seen_events(prevs)
if min_depth and pdu.depth < min_depth:
# This is so that we don't notify the user about this
@ -271,7 +268,7 @@ class FederationHandler(BaseHandler):
len(missing_prevs),
shortstr(missing_prevs),
)
with (yield self._room_pdu_linearizer.queue(pdu.room_id)):
with (await self._room_pdu_linearizer.queue(pdu.room_id)):
logger.info(
"[%s %s] Acquired room lock to fetch %d missing prev_events",
room_id,
@ -280,7 +277,7 @@ class FederationHandler(BaseHandler):
)
try:
yield self._get_missing_events_for_pdu(
await self._get_missing_events_for_pdu(
origin, pdu, prevs, min_depth
)
except Exception as e:
@ -291,7 +288,7 @@ class FederationHandler(BaseHandler):
# Update the set of things we've seen after trying to
# fetch the missing stuff
seen = yield self.store.have_seen_events(prevs)
seen = await self.store.have_seen_events(prevs)
if not prevs - seen:
logger.info(
@ -355,7 +352,7 @@ class FederationHandler(BaseHandler):
event_map = {event_id: pdu}
try:
# Get the state of the events we know about
ours = yield self.state_store.get_state_groups_ids(room_id, seen)
ours = await self.state_store.get_state_groups_ids(room_id, seen)
# state_maps is a list of mappings from (type, state_key) to event_id
state_maps = list(
@ -372,7 +369,7 @@ class FederationHandler(BaseHandler):
"Requesting state at missing prev_event %s", event_id,
)
room_version = yield self.store.get_room_version(room_id)
room_version = await self.store.get_room_version(room_id)
with nested_logging_context(p):
# note that if any of the missing prevs share missing state or
@ -381,11 +378,11 @@ class FederationHandler(BaseHandler):
(
remote_state,
got_auth_chain,
) = yield self._get_state_for_room(origin, room_id, p)
) = await self._get_state_for_room(origin, room_id, p)
# we want the state *after* p; _get_state_for_room returns the
# state *before* p.
remote_event = yield self.federation_client.get_pdu(
remote_event = await self.federation_client.get_pdu(
[origin], p, room_version, outlier=True
)
@ -410,7 +407,7 @@ class FederationHandler(BaseHandler):
for x in remote_state:
event_map[x.event_id] = x
state_map = yield resolve_events_with_store(
state_map = await resolve_events_with_store(
room_version,
state_maps,
event_map,
@ -422,7 +419,7 @@ class FederationHandler(BaseHandler):
# First though we need to fetch all the events that are in
# state_map, so we can build up the state below.
evs = yield self.store.get_events(
evs = await self.store.get_events(
list(state_map.values()),
get_prev_content=False,
redact_behaviour=EventRedactBehaviour.AS_IS,
@ -446,12 +443,11 @@ class FederationHandler(BaseHandler):
affected=event_id,
)
yield self._process_received_pdu(
await self._process_received_pdu(
origin, pdu, state=state, auth_chain=auth_chain
)
@defer.inlineCallbacks
def _get_missing_events_for_pdu(self, origin, pdu, prevs, min_depth):
async def _get_missing_events_for_pdu(self, origin, pdu, prevs, min_depth):
"""
Args:
origin (str): Origin of the pdu. Will be called to get the missing events
@ -463,12 +459,12 @@ class FederationHandler(BaseHandler):
room_id = pdu.room_id
event_id = pdu.event_id
seen = yield self.store.have_seen_events(prevs)
seen = await self.store.have_seen_events(prevs)
if not prevs - seen:
return
latest = yield self.store.get_latest_event_ids_in_room(room_id)
latest = await self.store.get_latest_event_ids_in_room(room_id)
# We add the prev events that we have seen to the latest
# list to ensure the remote server doesn't give them to us
@ -532,7 +528,7 @@ class FederationHandler(BaseHandler):
# All that said: Let's try increasing the timout to 60s and see what happens.
try:
missing_events = yield self.federation_client.get_missing_events(
missing_events = await self.federation_client.get_missing_events(
origin,
room_id,
earliest_events_ids=list(latest),
@ -571,7 +567,7 @@ class FederationHandler(BaseHandler):
)
with nested_logging_context(ev.event_id):
try:
yield self.on_receive_pdu(origin, ev, sent_to_us_directly=False)
await self.on_receive_pdu(origin, ev, sent_to_us_directly=False)
except FederationError as e:
if e.code == 403:
logger.warning(
@ -583,30 +579,30 @@ class FederationHandler(BaseHandler):
else:
raise
@defer.inlineCallbacks
@log_function
def _get_state_for_room(self, destination, room_id, event_id):
async def _get_state_for_room(
self, destination: str, room_id: str, event_id: str
) -> Tuple[List[EventBase], List[EventBase]]:
"""Requests all of the room state at a given event from a remote homeserver.
Args:
destination (str): The remote homeserver to query for the state.
room_id (str): The id of the room we're interested in.
event_id (str): The id of the event we want the state at.
destination:: The remote homeserver to query for the state.
room_id: The id of the room we're interested in.
event_id: The id of the event we want the state at.
Returns:
Deferred[Tuple[List[EventBase], List[EventBase]]]:
A list of events in the state, and a list of events in the auth chain
for the given event.
"""
(
state_event_ids,
auth_event_ids,
) = yield self.federation_client.get_room_state_ids(
) = await self.federation_client.get_room_state_ids(
destination, room_id, event_id=event_id
)
desired_events = set(state_event_ids + auth_event_ids)
event_map = yield self._get_events_from_store_or_dest(
event_map = await self._get_events_from_store_or_dest(
destination, room_id, desired_events
)
@ -625,20 +621,20 @@ class FederationHandler(BaseHandler):
return pdus, auth_chain
@defer.inlineCallbacks
def _get_events_from_store_or_dest(self, destination, room_id, event_ids):
async def _get_events_from_store_or_dest(
self, destination: str, room_id: str, event_ids: Iterable[str]
) -> Dict[str, EventBase]:
"""Fetch events from a remote destination, checking if we already have them.
Args:
destination (str)
room_id (str)
event_ids (Iterable[str])
destination
room_id
event_ids
Returns:
Deferred[dict[str, EventBase]]: A deferred resolving to a map
from event_id to event
map from event_id to event
"""
fetched_events = yield self.store.get_events(event_ids, allow_rejected=True)
fetched_events = await self.store.get_events(event_ids, allow_rejected=True)
missing_events = set(event_ids) - fetched_events.keys()
@ -651,7 +647,7 @@ class FederationHandler(BaseHandler):
event_ids,
)
room_version = yield self.store.get_room_version(room_id)
room_version = await self.store.get_room_version(room_id)
# XXX 20 requests at once? really?
for batch in batch_iter(missing_events, 20):
@ -665,7 +661,7 @@ class FederationHandler(BaseHandler):
for e_id in batch
]
res = yield make_deferred_yieldable(
res = await make_deferred_yieldable(
defer.DeferredList(deferreds, consumeErrors=True)
)
for success, result in res:
@ -674,8 +670,7 @@ class FederationHandler(BaseHandler):
return fetched_events
@defer.inlineCallbacks
def _process_received_pdu(self, origin, event, state, auth_chain):
async def _process_received_pdu(self, origin, event, state, auth_chain):
""" Called when we have a new pdu. We need to do auth checks and put it
through the StateHandler.
"""
@ -690,7 +685,7 @@ class FederationHandler(BaseHandler):
if auth_chain:
event_ids |= {e.event_id for e in auth_chain}
seen_ids = yield self.store.have_seen_events(event_ids)
seen_ids = await self.store.have_seen_events(event_ids)
if state and auth_chain is not None:
# If we have any state or auth_chain given to us by the replication
@ -717,18 +712,18 @@ class FederationHandler(BaseHandler):
event_id,
[e.event.event_id for e in event_infos],
)
yield self._handle_new_events(origin, event_infos)
await self._handle_new_events(origin, event_infos)
try:
context = yield self._handle_new_event(origin, event, state=state)
context = await self._handle_new_event(origin, event, state=state)
except AuthError as e:
raise FederationError("ERROR", e.code, e.msg, affected=event.event_id)
room = yield self.store.get_room(room_id)
room = await self.store.get_room(room_id)
if not room:
try:
yield self.store.store_room(
await self.store.store_room(
room_id=room_id, room_creator_user_id="", is_public=False
)
except StoreError:
@ -741,11 +736,11 @@ class FederationHandler(BaseHandler):
# changing their profile info.
newly_joined = True
prev_state_ids = yield context.get_prev_state_ids(self.store)
prev_state_ids = await context.get_prev_state_ids(self.store)
prev_state_id = prev_state_ids.get((event.type, event.state_key))
if prev_state_id:
prev_state = yield self.store.get_event(
prev_state = await self.store.get_event(
prev_state_id, allow_none=True
)
if prev_state and prev_state.membership == Membership.JOIN:
@ -753,11 +748,10 @@ class FederationHandler(BaseHandler):
if newly_joined:
user = UserID.from_string(event.state_key)
yield self.user_joined_room(user, room_id)
await self.user_joined_room(user, room_id)
@log_function
@defer.inlineCallbacks
def backfill(self, dest, room_id, limit, extremities):
async def backfill(self, dest, room_id, limit, extremities):
""" Trigger a backfill request to `dest` for the given `room_id`
This will attempt to get more events from the remote. If the other side
@ -774,9 +768,9 @@ class FederationHandler(BaseHandler):
if dest == self.server_name:
raise SynapseError(400, "Can't backfill from self.")
room_version = yield self.store.get_room_version(room_id)
room_version = await self.store.get_room_version(room_id)
events = yield self.federation_client.backfill(
events = await self.federation_client.backfill(
dest, room_id, limit=limit, extremities=extremities
)
@ -791,7 +785,7 @@ class FederationHandler(BaseHandler):
# self._sanity_check_event(ev)
# Don't bother processing events we already have.
seen_events = yield self.store.have_events_in_timeline(
seen_events = await self.store.have_events_in_timeline(
set(e.event_id for e in events)
)
@ -814,7 +808,7 @@ class FederationHandler(BaseHandler):
state_events = {}
events_to_state = {}
for e_id in edges:
state, auth = yield self._get_state_for_room(
state, auth = await self._get_state_for_room(
destination=dest, room_id=room_id, event_id=e_id
)
auth_events.update({a.event_id: a for a in auth})
@ -839,7 +833,7 @@ class FederationHandler(BaseHandler):
# We repeatedly do this until we stop finding new auth events.
while missing_auth - failed_to_fetch:
logger.info("Missing auth for backfill: %r", missing_auth)
ret_events = yield self.store.get_events(missing_auth - failed_to_fetch)
ret_events = await self.store.get_events(missing_auth - failed_to_fetch)
auth_events.update(ret_events)
required_auth.update(
@ -853,7 +847,7 @@ class FederationHandler(BaseHandler):
missing_auth - failed_to_fetch,
)
results = yield make_deferred_yieldable(
results = await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
@ -880,7 +874,7 @@ class FederationHandler(BaseHandler):
failed_to_fetch = missing_auth - set(auth_events)
seen_events = yield self.store.have_seen_events(
seen_events = await self.store.have_seen_events(
set(auth_events.keys()) | set(state_events.keys())
)
@ -942,7 +936,7 @@ class FederationHandler(BaseHandler):
)
)
yield self._handle_new_events(dest, ev_infos, backfilled=True)
await self._handle_new_events(dest, ev_infos, backfilled=True)
# Step 2: Persist the rest of the events in the chunk one by one
events.sort(key=lambda e: e.depth)
@ -958,16 +952,15 @@ class FederationHandler(BaseHandler):
# We store these one at a time since each event depends on the
# previous to work out the state.
# TODO: We can probably do something more clever here.
yield self._handle_new_event(dest, event, backfilled=True)
await self._handle_new_event(dest, event, backfilled=True)
return events
@defer.inlineCallbacks
def maybe_backfill(self, room_id, current_depth):
async def maybe_backfill(self, room_id, current_depth):
"""Checks the database to see if we should backfill before paginating,
and if so do.
"""
extremities = yield self.store.get_oldest_events_with_depth_in_room(room_id)
extremities = await self.store.get_oldest_events_with_depth_in_room(room_id)
if not extremities:
logger.debug("Not backfilling as no extremeties found.")
@ -999,9 +992,9 @@ class FederationHandler(BaseHandler):
# state *before* the event, ignoring the special casing certain event
# types have.
forward_events = yield self.store.get_successor_events(list(extremities))
forward_events = await self.store.get_successor_events(list(extremities))
extremities_events = yield self.store.get_events(
extremities_events = await self.store.get_events(
forward_events,
redact_behaviour=EventRedactBehaviour.AS_IS,
get_prev_content=False,
@ -1009,7 +1002,7 @@ class FederationHandler(BaseHandler):
# We set `check_history_visibility_only` as we might otherwise get false
# positives from users having been erased.
filtered_extremities = yield filter_events_for_server(
filtered_extremities = await filter_events_for_server(
self.storage,
self.server_name,
list(extremities_events.values()),
@ -1039,7 +1032,7 @@ class FederationHandler(BaseHandler):
# First we try hosts that are already in the room
# TODO: HEURISTIC ALERT.
curr_state = yield self.state_handler.get_current_state(room_id)
curr_state = await self.state_handler.get_current_state(room_id)
def get_domains_from_state(state):
"""Get joined domains from state
@ -1078,12 +1071,11 @@ class FederationHandler(BaseHandler):
domain for domain, depth in curr_domains if domain != self.server_name
]
@defer.inlineCallbacks
def try_backfill(domains):
async def try_backfill(domains):
# TODO: Should we try multiple of these at a time?
for dom in domains:
try:
yield self.backfill(
await self.backfill(
dom, room_id, limit=100, extremities=extremities
)
# If this succeeded then we probably already have the
@ -1114,7 +1106,7 @@ class FederationHandler(BaseHandler):
return False
success = yield try_backfill(likely_domains)
success = await try_backfill(likely_domains)
if success:
return True
@ -1128,7 +1120,7 @@ class FederationHandler(BaseHandler):
logger.debug("calling resolve_state_groups in _maybe_backfill")
resolve = preserve_fn(self.state_handler.resolve_state_groups_for_events)
states = yield make_deferred_yieldable(
states = await make_deferred_yieldable(
defer.gatherResults(
[resolve(room_id, [e]) for e in event_ids], consumeErrors=True
)
@ -1138,7 +1130,7 @@ class FederationHandler(BaseHandler):
# event_ids.
states = dict(zip(event_ids, [s.state for s in states]))
state_map = yield self.store.get_events(
state_map = await self.store.get_events(
[e_id for ids in itervalues(states) for e_id in itervalues(ids)],
get_prev_content=False,
)
@ -1154,7 +1146,7 @@ class FederationHandler(BaseHandler):
for e_id, _ in sorted_extremeties_tuple:
likely_domains = get_domains_from_state(states[e_id])
success = yield try_backfill(
success = await try_backfill(
[dom for dom, _ in likely_domains if dom not in tried_domains]
)
if success:
@ -1331,8 +1323,7 @@ class FederationHandler(BaseHandler):
return True
@defer.inlineCallbacks
def _handle_queued_pdus(self, room_queue):
async def _handle_queued_pdus(self, room_queue):
"""Process PDUs which got queued up while we were busy send_joining.
Args:
@ -1348,7 +1339,7 @@ class FederationHandler(BaseHandler):
p.room_id,
)
with nested_logging_context(p.event_id):
yield self.on_receive_pdu(origin, p, sent_to_us_directly=True)
await self.on_receive_pdu(origin, p, sent_to_us_directly=True)
except Exception as e:
logger.warning(
"Error handling queued PDU %s from %s: %s", p.event_id, origin, e
@ -2907,7 +2898,7 @@ class FederationHandler(BaseHandler):
room_id=room_id, user_id=user.to_string(), change="joined"
)
else:
return user_joined_room(self.distributor, user, room_id)
return defer.succeed(user_joined_room(self.distributor, user, room_id))
@defer.inlineCallbacks
def get_room_complexity(self, remote_room_hosts, room_id):

27
synapse/handlers/pagination.py
View File

@ -280,8 +280,7 @@ class PaginationHandler(object):
await self.storage.purge_events.purge_room(room_id)
@defer.inlineCallbacks
def get_messages(
async def get_messages(
self,
requester,
room_id=None,
@ -307,7 +306,7 @@ class PaginationHandler(object):
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token_for_pagination()
await self.hs.get_event_sources().get_current_token_for_pagination()
)
room_token = pagin_config.from_token.room_key
@ -319,11 +318,11 @@ class PaginationHandler(object):
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
with (await self.pagination_lock.read(room_id)):
(
membership,
member_event_id,
) = yield self.auth.check_in_room_or_world_readable(room_id, user_id)
) = await self.auth.check_in_room_or_world_readable(room_id, user_id)
if source_config.direction == "b":
# if we're going backwards, we might need to backfill. This
@ -331,7 +330,7 @@ class PaginationHandler(object):
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
max_topo = await self.store.get_max_topological_token(
room_id, room_token.stream
)
@ -339,18 +338,18 @@ class PaginationHandler(object):
# If they have left the room then clamp the token to be before
# they left the room, to save the effort of loading from the
# database.
leave_token = yield self.store.get_topological_token_for_event(
leave_token = await self.store.get_topological_token_for_event(
member_event_id
)
leave_token = RoomStreamToken.parse(leave_token)
if leave_token.topological < max_topo:
source_config.from_key = str(leave_token)
yield self.hs.get_handlers().federation_handler.maybe_backfill(
await self.hs.get_handlers().federation_handler.maybe_backfill(
room_id, max_topo
)
events, next_key = yield self.store.paginate_room_events(
events, next_key = await self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
@ -365,7 +364,7 @@ class PaginationHandler(object):
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
events = await filter_events_for_client(
self.storage, user_id, events, is_peeking=(member_event_id is None)
)
@ -385,19 +384,19 @@ class PaginationHandler(object):
(EventTypes.Member, event.sender) for event in events
)
state_ids = yield self.state_store.get_state_ids_for_event(
state_ids = await self.state_store.get_state_ids_for_event(
events[0].event_id, state_filter=state_filter
)
if state_ids:
state = yield self.store.get_events(list(state_ids.values()))
state = await self.store.get_events(list(state_ids.values()))
state = state.values()
time_now = self.clock.time_msec()
chunk = {
"chunk": (
yield self._event_serializer.serialize_events(
await self._event_serializer.serialize_events(
events, time_now, as_client_event=as_client_event
)
),
@ -406,7 +405,7 @@ class PaginationHandler(object):
}
if state:
chunk["state"] = yield self._event_serializer.serialize_events(
chunk["state"] = await self._event_serializer.serialize_events(
state, time_now, as_client_event=as_client_event
)

10
tests/test_federation.py
View File

@ -1,6 +1,6 @@
from mock import Mock
from twisted.internet.defer import maybeDeferred, succeed
from twisted.internet.defer import ensureDeferred, maybeDeferred, succeed
from synapse.events import FrozenEvent
from synapse.logging.context import LoggingContext
@ -70,9 +70,11 @@ class MessageAcceptTests(unittest.TestCase):
)
# Send the join, it should return None (which is not an error)
d = self.handler.on_receive_pdu(
d = ensureDeferred(
self.handler.on_receive_pdu(
"test.serv", join_event, sent_to_us_directly=True
)
)
self.reactor.advance(1)
self.assertEqual(self.successResultOf(d), None)
@ -119,9 +121,11 @@ class MessageAcceptTests(unittest.TestCase):
)
with LoggingContext(request="lying_event"):
d = self.handler.on_receive_pdu(
d = ensureDeferred(
self.handler.on_receive_pdu(
"test.serv", lying_event, sent_to_us_directly=True
)
)
# Step the reactor, so the database fetches come back
self.reactor.advance(1)