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Add helpers for getting prev and auth events (#4139)

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* Add helpers for getting prev and auth events

This is in preparation for allowing the event format to change between
room versions.
This commit is contained in:
Erik Johnston 2018-11-05 13:35:15 +00:00 committed by Amber Brown
parent 0467384d2f
commit bc80b3f454
10 changed files with 62 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
changelog.d/4139.misc Normal file
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@ -0,0 +1 @@
Add helpers functions for getting prev and auth events of an event

4
synapse/event_auth.py
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@ -200,11 +200,11 @@ def _is_membership_change_allowed(event, auth_events):
membership = event.content["membership"]
# Check if this is the room creator joining:
if len(event.prev_events) == 1 and Membership.JOIN == membership:
if len(event.prev_event_ids()) == 1 and Membership.JOIN == membership:
# Get room creation event:
key = (EventTypes.Create, "", )
create = auth_events.get(key)
if create and event.prev_events[0][0] == create.event_id:
if create and event.prev_event_ids()[0] == create.event_id:
if create.content["creator"] == event.state_key:
return

18
synapse/events/__init__.py
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@ -159,6 +159,24 @@ class EventBase(object):
def keys(self):
return six.iterkeys(self._event_dict)
def prev_event_ids(self):
"""Returns the list of prev event IDs. The order matches the order
specified in the event, though there is no meaning to it.
Returns:
list[str]: The list of event IDs of this event's prev_events
"""
return [e for e, _ in self.prev_events]
def auth_event_ids(self):
"""Returns the list of auth event IDs. The order matches the order
specified in the event, though there is no meaning to it.
Returns:
list[str]: The list of event IDs of this event's auth_events
"""
return [e for e, _ in self.auth_events]
class FrozenEvent(EventBase):
def __init__(self, event_dict, internal_metadata_dict={}, rejected_reason=None):

4
synapse/federation/transaction_queue.py
View File

@ -183,9 +183,7 @@ class TransactionQueue(object):
# banned then it won't receive the event because it won't
# be in the room after the ban.
destinations = yield self.state.get_current_hosts_in_room(
event.room_id, latest_event_ids=[
prev_id for prev_id, _ in event.prev_events
],
event.room_id, latest_event_ids=event.prev_event_ids(),
)
except Exception:
logger.exception(

48
synapse/handlers/federation.py
View File

@ -239,7 +239,7 @@ class FederationHandler(BaseHandler):
room_id, event_id, min_depth,
)
prevs = {e_id for e_id, _ in pdu.prev_events}
prevs = set(pdu.prev_event_ids())
seen = yield self.store.have_seen_events(prevs)
if min_depth and pdu.depth < min_depth:
@ -607,7 +607,7 @@ class FederationHandler(BaseHandler):
if e.event_id in seen_ids:
continue
e.internal_metadata.outlier = True
auth_ids = [e_id for e_id, _ in e.auth_events]
auth_ids = e.auth_event_ids()
auth = {
(e.type, e.state_key): e for e in auth_chain
if e.event_id in auth_ids or e.type == EventTypes.Create
@ -726,7 +726,7 @@ class FederationHandler(BaseHandler):
edges = [
ev.event_id
for ev in events
if set(e_id for e_id, _ in ev.prev_events) - event_ids
if set(ev.prev_event_ids()) - event_ids
]
logger.info(
@ -753,7 +753,7 @@ class FederationHandler(BaseHandler):
required_auth = set(
a_id
for event in events + list(state_events.values()) + list(auth_events.values())
for a_id, _ in event.auth_events
for a_id in event.auth_event_ids()
)
auth_events.update({
e_id: event_map[e_id] for e_id in required_auth if e_id in event_map
@ -769,7 +769,7 @@ class FederationHandler(BaseHandler):
auth_events.update(ret_events)
required_auth.update(
a_id for event in ret_events.values() for a_id, _ in event.auth_events
a_id for event in ret_events.values() for a_id in event.auth_event_ids()
)
missing_auth = required_auth - set(auth_events)
@ -796,7 +796,7 @@ class FederationHandler(BaseHandler):
required_auth.update(
a_id
for event in results if event
for a_id, _ in event.auth_events
for a_id in event.auth_event_ids()
)
missing_auth = required_auth - set(auth_events)
@ -816,7 +816,7 @@ class FederationHandler(BaseHandler):
"auth_events": {
(auth_events[a_id].type, auth_events[a_id].state_key):
auth_events[a_id]
for a_id, _ in a.auth_events
for a_id in a.auth_event_ids()
if a_id in auth_events
}
})
@ -828,7 +828,7 @@ class FederationHandler(BaseHandler):
"auth_events": {
(auth_events[a_id].type, auth_events[a_id].state_key):
auth_events[a_id]
for a_id, _ in event_map[e_id].auth_events
for a_id in event_map[e_id].auth_event_ids()
if a_id in auth_events
}
})
@ -1041,17 +1041,17 @@ class FederationHandler(BaseHandler):
Raises:
SynapseError if the event does not pass muster
"""
if len(ev.prev_events) > 20:
if len(ev.prev_event_ids()) > 20:
logger.warn("Rejecting event %s which has %i prev_events",
ev.event_id, len(ev.prev_events))
ev.event_id, len(ev.prev_event_ids()))
raise SynapseError(
http_client.BAD_REQUEST,
"Too many prev_events",
)
if len(ev.auth_events) > 10:
if len(ev.auth_event_ids()) > 10:
logger.warn("Rejecting event %s which has %i auth_events",
ev.event_id, len(ev.auth_events))
ev.event_id, len(ev.auth_event_ids()))
raise SynapseError(
http_client.BAD_REQUEST,
"Too many auth_events",
@ -1076,7 +1076,7 @@ class FederationHandler(BaseHandler):
def on_event_auth(self, event_id):
event = yield self.store.get_event(event_id)
auth = yield self.store.get_auth_chain(
[auth_id for auth_id, _ in event.auth_events],
[auth_id for auth_id in event.auth_event_ids()],
include_given=True
)
defer.returnValue([e for e in auth])
@ -1698,7 +1698,7 @@ class FederationHandler(BaseHandler):
missing_auth_events = set()
for e in itertools.chain(auth_events, state, [event]):
for e_id, _ in e.auth_events:
for e_id in e.auth_event_ids():
if e_id not in event_map:
missing_auth_events.add(e_id)
@ -1717,7 +1717,7 @@ class FederationHandler(BaseHandler):
for e in itertools.chain(auth_events, state, [event]):
auth_for_e = {
(event_map[e_id].type, event_map[e_id].state_key): event_map[e_id]
for e_id, _ in e.auth_events
for e_id in e.auth_event_ids()
if e_id in event_map
}
if create_event:
@ -1785,10 +1785,10 @@ class FederationHandler(BaseHandler):
# This is a hack to fix some old rooms where the initial join event
# didn't reference the create event in its auth events.
if event.type == EventTypes.Member and not event.auth_events:
if len(event.prev_events) == 1 and event.depth < 5:
if event.type == EventTypes.Member and not event.auth_event_ids():
if len(event.prev_event_ids()) == 1 and event.depth < 5:
c = yield self.store.get_event(
event.prev_events[0][0],
event.prev_event_ids()[0],
allow_none=True,
)
if c and c.type == EventTypes.Create:
@ -1835,7 +1835,7 @@ class FederationHandler(BaseHandler):
# Now get the current auth_chain for the event.
local_auth_chain = yield self.store.get_auth_chain(
[auth_id for auth_id, _ in event.auth_events],
[auth_id for auth_id in event.auth_event_ids()],
include_given=True
)
@ -1891,7 +1891,7 @@ class FederationHandler(BaseHandler):
"""
# Check if we have all the auth events.
current_state = set(e.event_id for e in auth_events.values())
event_auth_events = set(e_id for e_id, _ in event.auth_events)
event_auth_events = set(event.auth_event_ids())
if event.is_state():
event_key = (event.type, event.state_key)
@ -1935,7 +1935,7 @@ class FederationHandler(BaseHandler):
continue
try:
auth_ids = [e_id for e_id, _ in e.auth_events]
auth_ids = e.auth_event_ids()
auth = {
(e.type, e.state_key): e for e in remote_auth_chain
if e.event_id in auth_ids or e.type == EventTypes.Create
@ -1956,7 +1956,7 @@ class FederationHandler(BaseHandler):
pass
have_events = yield self.store.get_seen_events_with_rejections(
[e_id for e_id, _ in event.auth_events]
event.auth_event_ids()
)
seen_events = set(have_events.keys())
except Exception:
@ -2058,7 +2058,7 @@ class FederationHandler(BaseHandler):
continue
try:
auth_ids = [e_id for e_id, _ in ev.auth_events]
auth_ids = ev.auth_event_ids()
auth = {
(e.type, e.state_key): e
for e in result["auth_chain"]
@ -2250,7 +2250,7 @@ class FederationHandler(BaseHandler):
missing_remote_ids = [e.event_id for e in missing_remotes]
base_remote_rejected = list(missing_remotes)
for e in missing_remotes:
for e_id, _ in e.auth_events:
for e_id in e.auth_event_ids():
if e_id in missing_remote_ids:
try:
base_remote_rejected.remove(e)

2
synapse/state/__init__.py
View File

@ -261,7 +261,7 @@ class StateHandler(object):
logger.debug("calling resolve_state_groups from compute_event_context")
entry = yield self.resolve_state_groups_for_events(
event.room_id, [e for e, _ in event.prev_events],
event.room_id, event.prev_event_ids(),
)
prev_state_ids = entry.state

16
synapse/state/v2.py
View File

@ -159,7 +159,7 @@ def _get_power_level_for_sender(event_id, event_map, state_res_store):
event = yield _get_event(event_id, event_map, state_res_store)
pl = None
for aid, _ in event.auth_events:
for aid in event.auth_event_ids():
aev = yield _get_event(aid, event_map, state_res_store)
if (aev.type, aev.state_key) == (EventTypes.PowerLevels, ""):
pl = aev
@ -167,7 +167,7 @@ def _get_power_level_for_sender(event_id, event_map, state_res_store):
if pl is None:
# Couldn't find power level. Check if they're the creator of the room
for aid, _ in event.auth_events:
for aid in event.auth_event_ids():
aev = yield _get_event(aid, event_map, state_res_store)
if (aev.type, aev.state_key) == (EventTypes.Create, ""):
if aev.content.get("creator") == event.sender:
@ -299,7 +299,7 @@ def _add_event_and_auth_chain_to_graph(graph, event_id, event_map,
graph.setdefault(eid, set())
event = yield _get_event(eid, event_map, state_res_store)
for aid, _ in event.auth_events:
for aid in event.auth_event_ids():
if aid in auth_diff:
if aid not in graph:
state.append(aid)
@ -369,7 +369,7 @@ def _iterative_auth_checks(event_ids, base_state, event_map, state_res_store):
event = event_map[event_id]
auth_events = {}
for aid, _ in event.auth_events:
for aid in event.auth_event_ids():
ev = yield _get_event(aid, event_map, state_res_store)
if ev.rejected_reason is None:
@ -417,9 +417,9 @@ def _mainline_sort(event_ids, resolved_power_event_id, event_map,
while pl:
mainline.append(pl)
pl_ev = yield _get_event(pl, event_map, state_res_store)
auth_events = pl_ev.auth_events
auth_events = pl_ev.auth_event_ids()
pl = None
for aid, _ in auth_events:
for aid in auth_events:
ev = yield _get_event(aid, event_map, state_res_store)
if (ev.type, ev.state_key) == (EventTypes.PowerLevels, ""):
pl = aid
@ -464,10 +464,10 @@ def _get_mainline_depth_for_event(event, mainline_map, event_map, state_res_stor
if depth is not None:
defer.returnValue(depth)
auth_events = event.auth_events
auth_events = event.auth_event_ids()
event = None
for aid, _ in auth_events:
for aid in auth_events:
aev = yield _get_event(aid, event_map, state_res_store)
if (aev.type, aev.state_key) == (EventTypes.PowerLevels, ""):
event = aev

4
synapse/storage/event_federation.py
View File

@ -477,7 +477,7 @@ class EventFederationStore(EventFederationWorkerStore):
"is_state": False,
}
for ev in events
for e_id, _ in ev.prev_events
for e_id in ev.prev_event_ids()
],
)
@ -510,7 +510,7 @@ class EventFederationStore(EventFederationWorkerStore):
txn.executemany(query, [
(e_id, ev.room_id, e_id, ev.room_id, e_id, ev.room_id, False)
for ev in events for e_id, _ in ev.prev_events
for ev in events for e_id in ev.prev_event_ids()
if not ev.internal_metadata.is_outlier()
])

8
synapse/storage/events.py
View File

@ -416,7 +416,7 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
)
if len_1:
all_single_prev_not_state = all(
len(event.prev_events) == 1
len(event.prev_event_ids()) == 1
and not event.is_state()
for event, ctx in ev_ctx_rm
)
@ -440,7 +440,7 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
# guess this by looking at the prev_events and checking
# if they match the current forward extremities.
for ev, _ in ev_ctx_rm:
prev_event_ids = set(e for e, _ in ev.prev_events)
prev_event_ids = set(ev.prev_event_ids())
if latest_event_ids == prev_event_ids:
state_delta_reuse_delta_counter.inc()
break
@ -551,7 +551,7 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
result.difference_update(
e_id
for event in new_events
for e_id, _ in event.prev_events
for e_id in event.prev_event_ids()
)
# Finally, remove any events which are prev_events of any existing events.
@ -869,7 +869,7 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
"auth_id": auth_id,
}
for event, _ in events_and_contexts
for auth_id, _ in event.auth_events
for auth_id in event.auth_event_ids()
if event.is_state()
],
)

2
tests/state/test_v2.py
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@ -753,7 +753,7 @@ class TestStateResolutionStore(object):
result.add(event_id)
event = self.event_map[event_id]
for aid, _ in event.auth_events:
for aid in event.auth_event_ids():
stack.append(aid)
return list(result)