diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/handlers/deactivate_account.py | 11 | ||||
| -rw-r--r-- | synapse/handlers/e2e_keys.py | 2 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 54 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 12 | ||||
| -rw-r--r-- | synapse/handlers/presence.py | 4 | ||||
| -rw-r--r-- | synapse/handlers/sync.py | 2 | ||||
| -rw-r--r-- | synapse/http/endpoint.py | 18 | ||||
| -rw-r--r-- | synapse/push/emailpusher.py | 4 | ||||
| -rw-r--r-- | synapse/push/httppusher.py | 6 | ||||
| -rw-r--r-- | synapse/replication/slave/storage/events.py | 2 | ||||
| -rw-r--r-- | synapse/replication/tcp/client.py | 6 | ||||
| -rw-r--r-- | synapse/replication/tcp/resource.py | 4 | ||||
| -rw-r--r-- | synapse/rest/client/v1/admin.py | 4 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/account.py | 13 | ||||
| -rw-r--r-- | synapse/storage/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/storage/schema/delta/50/erasure_store.sql | 21 | ||||
| -rw-r--r-- | synapse/storage/user_erasure_store.py | 103 | ||||
| -rw-r--r-- | synapse/util/__init__.py | 3 | ||||
| -rw-r--r-- | synapse/visibility.py | 77 |
19 files changed, 295 insertions, 53 deletions
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py index 8ec5ba2012..a18d95397c 100644 --- a/synapse/handlers/deactivate_account.py +++ b/synapse/handlers/deactivate_account.py @@ -12,7 +12,7 @@ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. -from twisted.internet import defer, reactor +from twisted.internet import defer from ._base import BaseHandler from synapse.types import UserID, create_requester @@ -39,10 +39,10 @@ class DeactivateAccountHandler(BaseHandler): # Start the user parter loop so it can resume parting users from rooms where # it left off (if it has work left to do). - reactor.callWhenRunning(self._start_user_parting) + hs.get_reactor().callWhenRunning(self._start_user_parting) @defer.inlineCallbacks - def deactivate_account(self, user_id): + def deactivate_account(self, user_id, erase_data): """Deactivate a user's account Args: @@ -92,6 +92,11 @@ class DeactivateAccountHandler(BaseHandler): # delete from user directory yield self.user_directory_handler.handle_user_deactivated(user_id) + # Mark the user as erased, if they asked for that + if erase_data: + logger.info("Marking %s as erased", user_id) + yield self.store.mark_user_erased(user_id) + # Now start the process that goes through that list and # parts users from rooms (if it isn't already running) self._start_user_parting() diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py index 8a2d177539..4d7bf5defd 100644 --- a/synapse/handlers/e2e_keys.py +++ b/synapse/handlers/e2e_keys.py @@ -80,7 +80,7 @@ class E2eKeysHandler(object): else: remote_queries[user_id] = device_ids - # Firt get local devices. + # First get local devices. failures = {} results = {} if local_query: diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 2571758284..b6f8d4cf82 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -460,6 +460,47 @@ class FederationHandler(BaseHandler): @measure_func("_filter_events_for_server") @defer.inlineCallbacks def _filter_events_for_server(self, server_name, room_id, events): + """Filter the given events for the given server, redacting those the + server can't see. + + Assumes the server is currently in the room. + + Returns + list[FrozenEvent] + """ + # First lets check to see if all the events have a history visibility + # of "shared" or "world_readable". If thats the case then we don't + # need to check membership (as we know the server is in the room). + event_to_state_ids = yield self.store.get_state_ids_for_events( + frozenset(e.event_id for e in events), + types=( + (EventTypes.RoomHistoryVisibility, ""), + ) + ) + + visibility_ids = set() + for sids in event_to_state_ids.itervalues(): + hist = sids.get((EventTypes.RoomHistoryVisibility, "")) + if hist: + visibility_ids.add(hist) + + # If we failed to find any history visibility events then the default + # is "shared" visiblity. + if not visibility_ids: + defer.returnValue(events) + + event_map = yield self.store.get_events(visibility_ids) + all_open = all( + e.content.get("history_visibility") in (None, "shared", "world_readable") + for e in event_map.itervalues() + ) + + if all_open: + defer.returnValue(events) + + # Ok, so we're dealing with events that have non-trivial visibility + # rules, so we need to also get the memberships of the room. + event_to_state_ids = yield self.store.get_state_ids_for_events( frozenset(e.event_id for e in events), types=( @@ -495,7 +536,20 @@ class FederationHandler(BaseHandler): for e_id, key_to_eid in event_to_state_ids.iteritems() } + erased_senders = yield self.store.are_users_erased( + e.sender for e in events, + ) + def redact_disallowed(event, state): + # if the sender has been gdpr17ed, always return a redacted + # copy of the event. + if erased_senders[event.sender]: + logger.info( + "Sender of %s has been erased, redacting", + event.event_id, + ) + return prune_event(event) + if not state: return event diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 7b9946ab91..8467284758 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -20,7 +20,7 @@ import sys from canonicaljson import encode_canonical_json import six from six import string_types, itervalues, iteritems -from twisted.internet import defer, reactor +from twisted.internet import defer from twisted.internet.defer import succeed from twisted.python.failure import Failure @@ -157,7 +157,7 @@ class MessageHandler(BaseHandler): # remove the purge from the list 24 hours after it completes def clear_purge(): del self._purges_by_id[purge_id] - reactor.callLater(24 * 3600, clear_purge) + self.hs.get_reactor().callLater(24 * 3600, clear_purge) def get_purge_status(self, purge_id): """Get the current status of an active purge @@ -491,7 +491,7 @@ class EventCreationHandler(object): target, e ) - is_exempt = yield self._is_exempt_from_privacy_policy(builder) + is_exempt = yield self._is_exempt_from_privacy_policy(builder, requester) if not is_exempt: yield self.assert_accepted_privacy_policy(requester) @@ -509,12 +509,13 @@ class EventCreationHandler(object): defer.returnValue((event, context)) - def _is_exempt_from_privacy_policy(self, builder): + def _is_exempt_from_privacy_policy(self, builder, requester): """"Determine if an event to be sent is exempt from having to consent to the privacy policy Args: builder (synapse.events.builder.EventBuilder): event being created + requester (Requster): user requesting this event Returns: Deferred[bool]: true if the event can be sent without the user @@ -525,6 +526,9 @@ class EventCreationHandler(object): membership = builder.content.get("membership", None) if membership == Membership.JOIN: return self._is_server_notices_room(builder.room_id) + elif membership == Membership.LEAVE: + # the user is always allowed to leave (but not kick people) + return builder.state_key == requester.user.to_string() return succeed(False) @defer.inlineCallbacks diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py index 7fe568132f..7db59fba00 100644 --- a/synapse/handlers/presence.py +++ b/synapse/handlers/presence.py @@ -22,7 +22,7 @@ The methods that define policy are: - should_notify """ -from twisted.internet import defer, reactor +from twisted.internet import defer from contextlib import contextmanager from six import itervalues, iteritems @@ -179,7 +179,7 @@ class PresenceHandler(object): # have not yet been persisted self.unpersisted_users_changes = set() - reactor.addSystemEventTrigger("before", "shutdown", self._on_shutdown) + hs.get_reactor().addSystemEventTrigger("before", "shutdown", self._on_shutdown) self.serial_to_user = {} self._next_serial = 1 diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index 51ec727df0..7f486e48e5 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -145,7 +145,7 @@ class SyncResult(collections.namedtuple("SyncResult", [ "invited", # InvitedSyncResult for each invited room. "archived", # ArchivedSyncResult for each archived room. "to_device", # List of direct messages for the device. - "device_lists", # List of user_ids whose devices have chanegd + "device_lists", # List of user_ids whose devices have changed "device_one_time_keys_count", # Dict of algorithm to count for one time keys # for this device "groups", diff --git a/synapse/http/endpoint.py b/synapse/http/endpoint.py index 87a482650d..80da870584 100644 --- a/synapse/http/endpoint.py +++ b/synapse/http/endpoint.py @@ -13,7 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. from twisted.internet.endpoints import HostnameEndpoint, wrapClientTLS -from twisted.internet import defer, reactor +from twisted.internet import defer from twisted.internet.error import ConnectError from twisted.names import client, dns from twisted.names.error import DNSNameError, DomainError @@ -74,21 +74,22 @@ def matrix_federation_endpoint(reactor, destination, ssl_context_factory=None, reactor, "matrix", domain, protocol="tcp", default_port=default_port, endpoint=transport_endpoint, endpoint_kw_args=endpoint_kw_args - )) + ), reactor) else: return _WrappingEndpointFac(transport_endpoint( reactor, domain, port, **endpoint_kw_args - )) + ), reactor) class _WrappingEndpointFac(object): - def __init__(self, endpoint_fac): + def __init__(self, endpoint_fac, reactor): self.endpoint_fac = endpoint_fac + self.reactor = reactor @defer.inlineCallbacks def connect(self, protocolFactory): conn = yield self.endpoint_fac.connect(protocolFactory) - conn = _WrappedConnection(conn) + conn = _WrappedConnection(conn, self.reactor) defer.returnValue(conn) @@ -98,9 +99,10 @@ class _WrappedConnection(object): """ __slots__ = ["conn", "last_request"] - def __init__(self, conn): + def __init__(self, conn, reactor): object.__setattr__(self, "conn", conn) object.__setattr__(self, "last_request", time.time()) + self._reactor = reactor def __getattr__(self, name): return getattr(self.conn, name) @@ -131,14 +133,14 @@ class _WrappedConnection(object): # Time this connection out if we haven't send a request in the last # N minutes # TODO: Cancel the previous callLater? - reactor.callLater(3 * 60, self._time_things_out_maybe) + self._reactor.callLater(3 * 60, self._time_things_out_maybe) d = self.conn.request(request) def update_request_time(res): self.last_request = time.time() # TODO: Cancel the previous callLater? - reactor.callLater(3 * 60, self._time_things_out_maybe) + self._reactor.callLater(3 * 60, self._time_things_out_maybe) return res d.addCallback(update_request_time) diff --git a/synapse/push/emailpusher.py b/synapse/push/emailpusher.py index ba7286cb72..52d4f087ee 100644 --- a/synapse/push/emailpusher.py +++ b/synapse/push/emailpusher.py @@ -13,7 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. -from twisted.internet import defer, reactor +from twisted.internet import defer from twisted.internet.error import AlreadyCalled, AlreadyCancelled import logging @@ -199,7 +199,7 @@ class EmailPusher(object): self.timed_call = None if soonest_due_at is not None: - self.timed_call = reactor.callLater( + self.timed_call = self.hs.get_reactor().callLater( self.seconds_until(soonest_due_at), self.on_timer ) diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py index bf7ff74a1a..7a481b5a1e 100644 --- a/synapse/push/httppusher.py +++ b/synapse/push/httppusher.py @@ -15,7 +15,7 @@ # limitations under the License. import logging -from twisted.internet import defer, reactor +from twisted.internet import defer from twisted.internet.error import AlreadyCalled, AlreadyCancelled from . import push_rule_evaluator @@ -220,7 +220,9 @@ class HttpPusher(object): ) else: logger.info("Push failed: delaying for %ds", self.backoff_delay) - self.timed_call = reactor.callLater(self.backoff_delay, self.on_timer) + self.timed_call = self.hs.get_reactor().callLater( + self.backoff_delay, self.on_timer + ) self.backoff_delay = min(self.backoff_delay * 2, self.MAX_BACKOFF_SEC) break diff --git a/synapse/replication/slave/storage/events.py b/synapse/replication/slave/storage/events.py index b1f64ef0d8..97d3196633 100644 --- a/synapse/replication/slave/storage/events.py +++ b/synapse/replication/slave/storage/events.py @@ -23,6 +23,7 @@ from synapse.storage.roommember import RoomMemberWorkerStore from synapse.storage.state import StateGroupWorkerStore from synapse.storage.stream import StreamWorkerStore from synapse.storage.signatures import SignatureWorkerStore +from synapse.storage.user_erasure_store import UserErasureWorkerStore from ._base import BaseSlavedStore from ._slaved_id_tracker import SlavedIdTracker @@ -45,6 +46,7 @@ class SlavedEventStore(EventFederationWorkerStore, EventsWorkerStore, StateGroupWorkerStore, SignatureWorkerStore, + UserErasureWorkerStore, BaseSlavedStore): def __init__(self, db_conn, hs): diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py index 6d2513c4e2..bb852b00af 100644 --- a/synapse/replication/tcp/client.py +++ b/synapse/replication/tcp/client.py @@ -15,7 +15,7 @@ """A replication client for use by synapse workers. """ -from twisted.internet import reactor, defer +from twisted.internet import defer from twisted.internet.protocol import ReconnectingClientFactory from .commands import ( @@ -44,7 +44,7 @@ class ReplicationClientFactory(ReconnectingClientFactory): self.server_name = hs.config.server_name self._clock = hs.get_clock() # As self.clock is defined in super class - reactor.addSystemEventTrigger("before", "shutdown", self.stopTrying) + hs.get_reactor().addSystemEventTrigger("before", "shutdown", self.stopTrying) def startedConnecting(self, connector): logger.info("Connecting to replication: %r", connector.getDestination()) @@ -95,7 +95,7 @@ class ReplicationClientHandler(object): factory = ReplicationClientFactory(hs, client_name, self) host = hs.config.worker_replication_host port = hs.config.worker_replication_port - reactor.connectTCP(host, port, factory) + hs.get_reactor().connectTCP(host, port, factory) def on_rdata(self, stream_name, token, rows): """Called when we get new replication data. By default this just pokes diff --git a/synapse/replication/tcp/resource.py b/synapse/replication/tcp/resource.py index 63bd6d2652..95ad8c1b4c 100644 --- a/synapse/replication/tcp/resource.py +++ b/synapse/replication/tcp/resource.py @@ -15,7 +15,7 @@ """The server side of the replication stream. """ -from twisted.internet import defer, reactor +from twisted.internet import defer from twisted.internet.protocol import Factory from .streams import STREAMS_MAP, FederationStream @@ -109,7 +109,7 @@ class ReplicationStreamer(object): self.is_looping = False self.pending_updates = False - reactor.addSystemEventTrigger("before", "shutdown", self.on_shutdown) + hs.get_reactor().addSystemEventTrigger("before", "shutdown", self.on_shutdown) def on_shutdown(self): # close all connections on shutdown diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py index b8665a45eb..ddaedb2a8c 100644 --- a/synapse/rest/client/v1/admin.py +++ b/synapse/rest/client/v1/admin.py @@ -254,7 +254,9 @@ class DeactivateAccountRestServlet(ClientV1RestServlet): if not is_admin: raise AuthError(403, "You are not a server admin") - yield self._deactivate_account_handler.deactivate_account(target_user_id) + yield self._deactivate_account_handler.deactivate_account( + target_user_id, False, + ) defer.returnValue((200, {})) diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index e1281cfbb6..80dbc3c92e 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -1,6 +1,7 @@ # -*- coding: utf-8 -*- # Copyright 2015, 2016 OpenMarket Ltd # Copyright 2017 Vector Creations Ltd +# Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -15,6 +16,7 @@ # limitations under the License. import logging +from six.moves import http_client from twisted.internet import defer from synapse.api.auth import has_access_token @@ -186,13 +188,20 @@ class DeactivateAccountRestServlet(RestServlet): @defer.inlineCallbacks def on_POST(self, request): body = parse_json_object_from_request(request) + erase = body.get("erase", False) + if not isinstance(erase, bool): + raise SynapseError( + http_client.BAD_REQUEST, + "Param 'erase' must be a boolean, if given", + Codes.BAD_JSON, + ) requester = yield self.auth.get_user_by_req(request) # allow ASes to dectivate their own users if requester.app_service: yield self._deactivate_account_handler.deactivate_account( - requester.user.to_string() + requester.user.to_string(), erase, ) defer.returnValue((200, {})) @@ -200,7 +209,7 @@ class DeactivateAccountRestServlet(RestServlet): requester, body, self.hs.get_ip_from_request(request), ) yield self._deactivate_account_handler.deactivate_account( - requester.user.to_string(), + requester.user.to_string(), erase, ) defer.returnValue((200, {})) diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py index 979fa22438..e843b702b9 100644 --- a/synapse/storage/__init__.py +++ b/synapse/storage/__init__.py @@ -20,6 +20,7 @@ import time import logging from synapse.storage.devices import DeviceStore +from synapse.storage.user_erasure_store import UserErasureStore from .appservice import ( ApplicationServiceStore, ApplicationServiceTransactionStore ) @@ -88,6 +89,7 @@ class DataStore(RoomMemberStore, RoomStore, DeviceInboxStore, UserDirectoryStore, GroupServerStore, + UserErasureStore, ): def __init__(self, db_conn, hs): diff --git a/synapse/storage/schema/delta/50/erasure_store.sql b/synapse/storage/schema/delta/50/erasure_store.sql new file mode 100644 index 0000000000..5d8641a9ab --- /dev/null +++ b/synapse/storage/schema/delta/50/erasure_store.sql @@ -0,0 +1,21 @@ +/* Copyright 2018 New Vector Ltd + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- a table of users who have requested that their details be erased +CREATE TABLE erased_users ( + user_id TEXT NOT NULL +); + +CREATE UNIQUE INDEX erased_users_user ON erased_users(user_id); diff --git a/synapse/storage/user_erasure_store.py b/synapse/storage/user_erasure_store.py new file mode 100644 index 0000000000..47bfc01e84 --- /dev/null +++ b/synapse/storage/user_erasure_store.py @@ -0,0 +1,103 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +import operator + +from twisted.internet import defer + +from synapse.storage._base import SQLBaseStore +from synapse.util.caches.descriptors import cachedList, cached + + +class UserErasureWorkerStore(SQLBaseStore): + @cached() + def is_user_erased(self, user_id): + """ + Check if the given user id has requested erasure + + Args: + user_id (str): full user id to check + + Returns: + Deferred[bool]: True if the user has requested erasure + """ + return self._simple_select_onecol( + table="erased_users", + keyvalues={"user_id": user_id}, + retcol="1", + desc="is_user_erased", + ).addCallback(operator.truth) + + @cachedList( + cached_method_name="is_user_erased", + list_name="user_ids", + inlineCallbacks=True, + ) + def are_users_erased(self, user_ids): + """ + Checks which users in a list have requested erasure + + Args: + user_ids (iterable[str]): full user id to check + + Returns: + Deferred[dict[str, bool]]: + for each user, whether the user has requested erasure. + """ + # this serves the dual purpose of (a) making sure we can do len and + # iterate it multiple times, and (b) avoiding duplicates. + user_ids = tuple(set(user_ids)) + + def _get_erased_users(txn): + txn.execute( + "SELECT user_id FROM erased_users WHERE user_id IN (%s)" % ( + ",".join("?" * len(user_ids)) + ), + user_ids, + ) + return set(r[0] for r in txn) + + erased_users = yield self.runInteraction( + "are_users_erased", _get_erased_users, + ) + res = dict((u, u in erased_users) for u in user_ids) + defer.returnValue(res) + + +class UserErasureStore(UserErasureWorkerStore): + def mark_user_erased(self, user_id): + """Indicate that user_id wishes their message history to be erased. + + Args: + user_id (str): full user_id to be erased + """ + def f(txn): + # first check if they are already in the list + txn.execute( + "SELECT 1 FROM erased_users WHERE user_id = ?", + (user_id, ) + ) + if txn.fetchone(): + return + + # they are not already there: do the insert. + txn.execute( + "INSERT INTO erased_users (user_id) VALUES (?)", + (user_id, ) + ) + + self._invalidate_cache_and_stream( + txn, self.is_user_erased, (user_id,) + ) + return self.runInteraction("mark_user_erased", f) diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py index 2a3df7c71d..e9886ef299 100644 --- a/synapse/util/__init__.py +++ b/synapse/util/__init__.py @@ -34,6 +34,9 @@ def unwrapFirstError(failure): class Clock(object): """ A Clock wraps a Twisted reactor and provides utilities on top of it. + + Args: + reactor: The Twisted reactor to use. """ _reactor = attr.ib() diff --git a/synapse/visibility.py b/synapse/visibility.py index aef4953c1d..65d79cf0d0 100644 --- a/synapse/visibility.py +++ b/synapse/visibility.py @@ -12,15 +12,17 @@ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. - +import itertools import logging +import operator from twisted.internet import defer -from synapse.api.constants import Membership, EventTypes - -from synapse.util.logcontext import make_deferred_yieldable, preserve_fn - +from synapse.api.constants import EventTypes, Membership +from synapse.events.utils import prune_event +from synapse.util.logcontext import ( + make_deferred_yieldable, preserve_fn, +) logger = logging.getLogger(__name__) @@ -95,16 +97,27 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if ignore_dict_content else [] ) + erased_senders = yield store.are_users_erased((e.sender for e in events)) + def allowed(event): """ Args: event (synapse.events.EventBase): event to check + + Returns: + None|EventBase: + None if the user cannot see this event at all + + a redacted copy of the event if they can only see a redacted + version + + the original event if they can see it as normal. """ if not event.is_state() and event.sender in ignore_list: - return False + return None if event.event_id in always_include_ids: - return True + return event state = event_id_to_state[event.event_id] @@ -118,10 +131,6 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if visibility not in VISIBILITY_PRIORITY: visibility = "shared" - # if it was world_readable, it's easy: everyone can read it - if visibility == "world_readable": - return True - # Always allow history visibility events on boundaries. This is done # by setting the effective visibility to the least restrictive # of the old vs new. @@ -155,7 +164,7 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if membership == "leave" and ( prev_membership == "join" or prev_membership == "invite" ): - return True + return event new_priority = MEMBERSHIP_PRIORITY.index(membership) old_priority = MEMBERSHIP_PRIORITY.index(prev_membership) @@ -166,31 +175,55 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if membership is None: membership_event = state.get((EventTypes.Member, user_id), None) if membership_event: + # XXX why do we do this? + # https://github.com/matrix-org/synapse/issues/3350 if membership_event.event_id not in event_id_forgotten: membership = membership_event.membership # if the user was a member of the room at the time of the event, # they can see it. if membership == Membership.JOIN: - return True + return event + + # otherwise, it depends on the room visibility. if visibility == "joined": # we weren't a member at the time of the event, so we can't # see this event. - return False + return None elif visibility == "invited": # user can also see the event if they were *invited* at the time # of the event. - return membership == Membership.INVITE - - else: - # visibility is shared: user can also see the event if they have - # become a member since the event + return ( + event if membership == Membership.INVITE else None + ) + + elif visibility == "shared" and is_peeking: + # if the visibility is shared, users cannot see the event unless + # they have *subequently* joined the room (or were members at the + # time, of course) # # XXX: if the user has subsequently joined and then left again, # ideally we would share history up to the point they left. But - # we don't know when they left. - return not is_peeking + # we don't know when they left. We just treat it as though they + # never joined, and restrict access. + return None + + # the visibility is either shared or world_readable, and the user was + # not a member at the time. We allow it, provided the original sender + # has not requested their data to be erased, in which case, we return + # a redacted version. + if erased_senders[event.sender]: + return prune_event(event) + + return event + + # check each event: gives an iterable[None|EventBase] + filtered_events = itertools.imap(allowed, events) + + # remove the None entries + filtered_events = filter(operator.truth, filtered_events) - defer.returnValue(list(filter(allowed, events))) + # we turn it into a list before returning it. + defer.returnValue(list(filtered_events)) |