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Merge pull request #689 from matrix-org/erikj/member 

Do checks for memberships before creating events
This commit is contained in:
Erik Johnston 2016-04-04 11:56:40 +01:00
parent 89e6839a48 d76d89323c
commit bf14883a04
6 changed files with 192 additions and 154 deletions
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72
synapse/handlers/_base.py
View File

@ -204,20 +204,25 @@ class BaseHandler(object):
)
@defer.inlineCallbacks
def _create_new_client_event(self, builder):
latest_ret = yield self.store.get_latest_event_ids_and_hashes_in_room(
builder.room_id,
)
if latest_ret:
depth = max([d for _, _, d in latest_ret]) + 1
def _create_new_client_event(self, builder, prev_event_ids=None):
if prev_event_ids:
prev_events = yield self.store.add_event_hashes(prev_event_ids)
prev_max_depth = yield self.store.get_max_depth_of_events(prev_event_ids)
depth = prev_max_depth + 1
else:
depth = 1
latest_ret = yield self.store.get_latest_event_ids_and_hashes_in_room(
builder.room_id,
)
prev_events = [
(event_id, prev_hashes)
for event_id, prev_hashes, _ in latest_ret
]
if latest_ret:
depth = max([d for _, _, d in latest_ret]) + 1
else:
depth = 1
prev_events = [
(event_id, prev_hashes)
for event_id, prev_hashes, _ in latest_ret
]
builder.prev_events = prev_events
builder.depth = depth
@ -226,49 +231,6 @@ class BaseHandler(object):
context = yield state_handler.compute_event_context(builder)
# If we've received an invite over federation, there are no latest
# events in the room, because we don't know enough about the graph
# fragment we received to treat it like a graph, so the above returned
# no relevant events. It may have returned some events (if we have
# joined and left the room), but not useful ones, like the invite.
if (
not self.is_host_in_room(context.current_state) and
builder.type == EventTypes.Member
):
prev_member_event = yield self.store.get_room_member(
builder.sender, builder.room_id
)
# The prev_member_event may already be in context.current_state,
# despite us not being present in the room; in particular, if
# inviting user, and all other local users, have already left.
#
# In that case, we have all the information we need, and we don't
# want to drop "context" - not least because we may need to handle
# the invite locally, which will require us to have the whole
# context (not just prev_member_event) to auth it.
#
context_event_ids = (
e.event_id for e in context.current_state.values()
)
if (
prev_member_event and
prev_member_event.event_id not in context_event_ids
):
# The prev_member_event is missing from context, so it must
# have arrived over federation and is an outlier. We forcibly
# set our context to the invite we received over federation
builder.prev_events = (
prev_member_event.event_id,
prev_member_event.prev_events
)
context = yield state_handler.compute_event_context(
builder,
old_state=(prev_member_event,)
)
if builder.is_state():
builder.prev_state = yield self.store.add_event_hashes(
context.prev_state_events

6
synapse/handlers/message.py
View File

@ -176,7 +176,7 @@ class MessageHandler(BaseHandler):
defer.returnValue(chunk)
@defer.inlineCallbacks
def create_event(self, event_dict, token_id=None, txn_id=None):
def create_event(self, event_dict, token_id=None, txn_id=None, prev_event_ids=None):
"""
Given a dict from a client, create a new event.
@ -187,6 +187,9 @@ class MessageHandler(BaseHandler):
Args:
event_dict (dict): An entire event
token_id (str)
txn_id (str)
prev_event_ids (list): The prev event ids to use when creating the event
Returns:
Tuple of created event (FrozenEvent), Context
@ -225,6 +228,7 @@ class MessageHandler(BaseHandler):
event, context = yield self._create_new_client_event(
builder=builder,
prev_event_ids=prev_event_ids,
)
defer.returnValue((event, context))

240
synapse/handlers/room_member.py
View File

@ -95,6 +95,82 @@ class RoomMemberHandler(BaseHandler):
if remotedomains is not None:
remotedomains.add(member.domain)
@defer.inlineCallbacks
def _local_membership_update(
self, requester, target, room_id, membership,
prev_event_ids,
txn_id=None,
ratelimit=True,
):
msg_handler = self.hs.get_handlers().message_handler
content = {"membership": membership}
if requester.is_guest:
content["kind"] = "guest"
event, context = yield msg_handler.create_event(
{
"type": EventTypes.Member,
"content": content,
"room_id": room_id,
"sender": requester.user.to_string(),
"state_key": target.to_string(),
# For backwards compatibility:
"membership": membership,
},
token_id=requester.access_token_id,
txn_id=txn_id,
prev_event_ids=prev_event_ids,
)
yield self.handle_new_client_event(
requester,
event,
context,
extra_users=[target],
ratelimit=ratelimit,
)
prev_member_event = context.current_state.get(
(EventTypes.Member, target.to_string()),
None
)
if event.membership == Membership.JOIN:
if not prev_member_event or prev_member_event.membership != Membership.JOIN:
# Only fire user_joined_room if the user has acutally joined the
# room. Don't bother if the user is just changing their profile
# info.
yield user_joined_room(self.distributor, target, room_id)
elif event.membership == Membership.LEAVE:
if prev_member_event and prev_member_event.membership == Membership.JOIN:
user_left_room(self.distributor, target, room_id)
@defer.inlineCallbacks
def remote_join(self, remote_room_hosts, room_id, user, content):
if len(remote_room_hosts) == 0:
raise SynapseError(404, "No known servers")
# We don't do an auth check if we are doing an invite
# join dance for now, since we're kinda implicitly checking
# that we are allowed to join when we decide whether or not we
# need to do the invite/join dance.
yield self.hs.get_handlers().federation_handler.do_invite_join(
remote_room_hosts,
room_id,
user.to_string(),
content,
)
yield user_joined_room(self.distributor, user, room_id)
def reject_remote_invite(self, user_id, room_id, remote_room_hosts):
return self.hs.get_handlers().federation_handler.do_remotely_reject_invite(
remote_room_hosts,
room_id,
user_id
)
@defer.inlineCallbacks
def update_membership(
self,
@ -120,28 +196,15 @@ class RoomMemberHandler(BaseHandler):
third_party_signed,
)
msg_handler = self.hs.get_handlers().message_handler
if not remote_room_hosts:
remote_room_hosts = []
content = {"membership": effective_membership_state}
if requester.is_guest:
content["kind"] = "guest"
event, context = yield msg_handler.create_event(
{
"type": EventTypes.Member,
"content": content,
"room_id": room_id,
"sender": requester.user.to_string(),
"state_key": target.to_string(),
# For backwards compatibility:
"membership": effective_membership_state,
},
token_id=requester.access_token_id,
txn_id=txn_id,
latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id)
current_state = yield self.state_handler.get_current_state(
room_id, latest_event_ids=latest_event_ids,
)
old_state = context.current_state.get((EventTypes.Member, event.state_key))
old_state = current_state.get((EventTypes.Member, target.to_string()))
old_membership = old_state.content.get("membership") if old_state else None
if action == "unban" and old_membership != "ban":
raise SynapseError(
@ -156,13 +219,58 @@ class RoomMemberHandler(BaseHandler):
errcode=Codes.BAD_STATE
)
member_handler = self.hs.get_handlers().room_member_handler
yield member_handler.send_membership_event(
requester,
event,
context,
is_host_in_room = self.is_host_in_room(current_state)
if effective_membership_state == Membership.JOIN:
if requester.is_guest and not self._can_guest_join(current_state):
# This should be an auth check, but guests are a local concept,
# so don't really fit into the general auth process.
raise AuthError(403, "Guest access not allowed")
if not is_host_in_room:
inviter = yield self.get_inviter(target.to_string(), room_id)
if inviter and not self.hs.is_mine(inviter):
remote_room_hosts.append(inviter.domain)
content = {"membership": Membership.JOIN}
if requester.is_guest:
content["kind"] = "guest"
ret = yield self.remote_join(
remote_room_hosts, room_id, target, content
)
defer.returnValue(ret)
elif effective_membership_state == Membership.LEAVE:
if not is_host_in_room:
# perhaps we've been invited
inviter = yield self.get_inviter(target.to_string(), room_id)
if not inviter:
raise SynapseError(404, "Not a known room")
if self.hs.is_mine(inviter):
# the inviter was on our server, but has now left. Carry on
# with the normal rejection codepath.
#
# This is a bit of a hack, because the room might still be
# active on other servers.
pass
else:
# send the rejection to the inviter's HS.
remote_room_hosts = remote_room_hosts + [inviter.domain]
ret = yield self.reject_remote_invite(
target.to_string(), room_id, remote_room_hosts
)
defer.returnValue(ret)
yield self._local_membership_update(
requester=requester,
target=target,
room_id=room_id,
membership=effective_membership_state,
txn_id=txn_id,
ratelimit=ratelimit,
remote_room_hosts=remote_room_hosts,
prev_event_ids=latest_event_ids,
)
@defer.inlineCallbacks
@ -211,73 +319,19 @@ class RoomMemberHandler(BaseHandler):
if prev_event is not None:
return
action = "send"
if event.membership == Membership.JOIN:
if requester.is_guest and not self._can_guest_join(context.current_state):
# This should be an auth check, but guests are a local concept,
# so don't really fit into the general auth process.
raise AuthError(403, "Guest access not allowed")
do_remote_join_dance, remote_room_hosts = self._should_do_dance(
context,
(self.get_inviter(event.state_key, context.current_state)),
remote_room_hosts,
)
if do_remote_join_dance:
action = "remote_join"
elif event.membership == Membership.LEAVE:
is_host_in_room = self.is_host_in_room(context.current_state)
if not is_host_in_room:
# perhaps we've been invited
inviter = self.get_inviter(
target_user.to_string(), context.current_state
)
if not inviter:
raise SynapseError(404, "Not a known room")
if self.hs.is_mine(inviter):
# the inviter was on our server, but has now left. Carry on
# with the normal rejection codepath.
#
# This is a bit of a hack, because the room might still be
# active on other servers.
pass
else:
# send the rejection to the inviter's HS.
remote_room_hosts = remote_room_hosts + [inviter.domain]
action = "remote_reject"
federation_handler = self.hs.get_handlers().federation_handler
if action == "remote_join":
if len(remote_room_hosts) == 0:
raise SynapseError(404, "No known servers")
# We don't do an auth check if we are doing an invite
# join dance for now, since we're kinda implicitly checking
# that we are allowed to join when we decide whether or not we
# need to do the invite/join dance.
yield federation_handler.do_invite_join(
remote_room_hosts,
event.room_id,
event.user_id,
event.content,
)
elif action == "remote_reject":
yield federation_handler.do_remotely_reject_invite(
remote_room_hosts,
room_id,
event.user_id
)
else:
yield self.handle_new_client_event(
requester,
event,
context,
extra_users=[target_user],
ratelimit=ratelimit,
)
yield self.handle_new_client_event(
requester,
event,
context,
extra_users=[target_user],
ratelimit=ratelimit,
)
prev_member_event = context.current_state.get(
(EventTypes.Member, target_user.to_string()),
@ -306,11 +360,11 @@ class RoomMemberHandler(BaseHandler):
and guest_access.content["guest_access"] == "can_join"
)
def _should_do_dance(self, context, inviter, room_hosts=None):
def _should_do_dance(self, current_state, inviter, room_hosts=None):
# TODO: Shouldn't this be remote_room_host?
room_hosts = room_hosts or []
is_host_in_room = self.is_host_in_room(context.current_state)
is_host_in_room = self.is_host_in_room(current_state)
if is_host_in_room:
return False, room_hosts
@ -344,11 +398,11 @@ class RoomMemberHandler(BaseHandler):
defer.returnValue((RoomID.from_string(room_id), servers))
def get_inviter(self, user_id, current_state):
prev_state = current_state.get((EventTypes.Member, user_id))
if prev_state and prev_state.membership == Membership.INVITE:
return UserID.from_string(prev_state.user_id)
return None
@defer.inlineCallbacks
def get_inviter(self, user_id, room_id):
invite = yield self.store.get_room_member(user_id=user_id, room_id=room_id)
if invite:
defer.returnValue(UserID.from_string(invite.sender))
@defer.inlineCallbacks
def get_joined_rooms_for_user(self, user):

8
synapse/state.py
View File

@ -75,7 +75,8 @@ class StateHandler(object):
self._state_cache.start()
@defer.inlineCallbacks
def get_current_state(self, room_id, event_type=None, state_key=""):
def get_current_state(self, room_id, event_type=None, state_key="",
latest_event_ids=None):
""" Retrieves the current state for the room. This is done by
calling `get_latest_events_in_room` to get the leading edges of the
event graph and then resolving any of the state conflicts.
@ -89,9 +90,10 @@ class StateHandler(object):
Returns:
map from (type, state_key) to event
"""
event_ids = yield self.store.get_latest_event_ids_in_room(room_id)
if not latest_event_ids:
latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id)
res = yield self.resolve_state_groups(room_id, event_ids)
res = yield self.resolve_state_groups(room_id, latest_event_ids)
state = res[1]
if event_type:

16
synapse/storage/event_federation.py
View File

@ -163,6 +163,22 @@ class EventFederationStore(SQLBaseStore):
room_id,
)
@defer.inlineCallbacks
def get_max_depth_of_events(self, event_ids):
sql = (
"SELECT MAX(depth) FROM events WHERE event_id IN (%s)"
) % (",".join(["?"] * len(event_ids)),)
rows = yield self._execute(
"get_max_depth_of_events", None,
sql, *event_ids
)
if rows:
defer.returnValue(rows[0][0])
else:
defer.returnValue(1)
def _get_min_depth_interaction(self, txn, room_id):
min_depth = self._simple_select_one_onecol_txn(
txn,

4
tests/rest/client/v1/test_rooms.py
View File

@ -259,8 +259,8 @@ class RoomPermissionsTestCase(RestTestCase):
# set [invite/join/left] of self, set [invite/join/left] of other,
# expect all 404s because room doesn't exist on any server
for usr in [self.user_id, self.rmcreator_id]:
yield self.join(room=room, user=usr, expect_code=404)
yield self.leave(room=room, user=usr, expect_code=404)
yield self.join(room=room, user=usr, expect_code=403)
yield self.leave(room=room, user=usr, expect_code=403)
@defer.inlineCallbacks
def test_membership_private_room_perms(self):