def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.pagination_lock = ReadWriteLock()
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def __init__(self, hs):
self.hs = hs
self.auth = hs.get_auth()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.pagination_lock = ReadWriteLock()
# We arbitrarily limit concurrent event creation for a room to 5.
# This is to stop us from diverging history *too* much.
self.limiter = Limiter(max_count=5)
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.snapshot_cache = SnapshotCache()
self.pagination_lock = ReadWriteLock()
def test_rwlock(self):
rwlock = ReadWriteLock()
key = object()
ds = [
rwlock.read(key), # 0
rwlock.read(key), # 1
rwlock.write(key), # 2
rwlock.write(key), # 3
rwlock.read(key), # 4
rwlock.read(key), # 5
rwlock.write(key), # 6
]
self._assert_called_before_not_after(ds, 2)
with ds[0].result:
self._assert_called_before_not_after(ds, 2)
self._assert_called_before_not_after(ds, 2)
with ds[1].result:
self._assert_called_before_not_after(ds, 2)
self._assert_called_before_not_after(ds, 3)
with ds[2].result:
self._assert_called_before_not_after(ds, 3)
self._assert_called_before_not_after(ds, 4)
with ds[3].result:
self._assert_called_before_not_after(ds, 4)
self._assert_called_before_not_after(ds, 6)
with ds[5].result:
self._assert_called_before_not_after(ds, 6)
self._assert_called_before_not_after(ds, 6)
with ds[4].result:
self._assert_called_before_not_after(ds, 6)
self._assert_called_before_not_after(ds, 7)
with ds[6].result:
pass
d = rwlock.write(key)
self.assertTrue(d.called)
with d.result:
pass
d = rwlock.read(key)
self.assertTrue(d.called)
with d.result:
pass
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def test_rwlock(self):
rwlock = ReadWriteLock()
key = object()
ds = [
rwlock.read(key), # 0
rwlock.read(key), # 1
rwlock.write(key), # 2
rwlock.write(key), # 3
rwlock.read(key), # 4
rwlock.read(key), # 5
rwlock.write(key), # 6
]
self._assert_called_before_not_after(ds, 2)
with ds[0].result:
self._assert_called_before_not_after(ds, 2)
self._assert_called_before_not_after(ds, 2)
with ds[1].result:
self._assert_called_before_not_after(ds, 2)
self._assert_called_before_not_after(ds, 3)
with ds[2].result:
self._assert_called_before_not_after(ds, 3)
self._assert_called_before_not_after(ds, 4)
with ds[3].result:
self._assert_called_before_not_after(ds, 4)
self._assert_called_before_not_after(ds, 6)
with ds[5].result:
self._assert_called_before_not_after(ds, 6)
self._assert_called_before_not_after(ds, 6)
with ds[4].result:
self._assert_called_before_not_after(ds, 6)
self._assert_called_before_not_after(ds, 7)
with ds[6].result:
pass
d = rwlock.write(key)
self.assertTrue(d.called)
with d.result:
pass
d = rwlock.read(key)
self.assertTrue(d.called)
with d.result:
pass
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def start_purge_history(self,
room_id,
topological_ordering,
delete_local_events=False):
"""Start off a history purge on a room.
Args:
room_id (str): The room to purge from
topological_ordering (int): minimum topo ordering to preserve
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
str: unique ID for this purge transaction.
"""
if room_id in self._purges_in_progress_by_room:
raise SynapseError(
400,
"History purge already in progress for %s" % (room_id, ),
)
purge_id = random_string(16)
# we log the purge_id here so that it can be tied back to the
# request id in the log lines.
logger.info("[purge] starting purge_id %s", purge_id)
self._purges_by_id[purge_id] = PurgeStatus()
run_in_background(
self._purge_history,
purge_id,
room_id,
topological_ordering,
delete_local_events,
)
return purge_id
@defer.inlineCallbacks
def _purge_history(self, purge_id, room_id, topological_ordering,
delete_local_events):
"""Carry out a history purge on a room.
Args:
purge_id (str): The id for this purge
room_id (str): The room to purge from
topological_ordering (int): minimum topo ordering to preserve
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
Deferred
"""
self._purges_in_progress_by_room.add(room_id)
try:
with (yield self.pagination_lock.write(room_id)):
yield self.store.purge_history(
room_id,
topological_ordering,
delete_local_events,
)
logger.info("[purge] complete")
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE
except Exception:
logger.error("[purge] failed: %s",
Failure().getTraceback().rstrip())
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED
finally:
self._purges_in_progress_by_room.discard(room_id)
# 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)
def get_purge_status(self, purge_id):
"""Get the current status of an active purge
Args:
purge_id (str): purge_id returned by start_purge_history
Returns:
PurgeStatus|None
"""
return self._purges_by_id.get(purge_id)
@defer.inlineCallbacks
def get_messages(self,
requester,
room_id=None,
pagin_config=None,
as_client_event=True,
event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id))
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token))
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk":
[serialize_event(e, time_now, as_client_event) for e in events],
"start":
pagin_config.from_token.to_string(),
"end":
next_token.to_string(),
}
defer.returnValue(chunk)
@defer.inlineCallbacks
def get_room_data(self,
user_id=None,
room_id=None,
event_type=None,
state_key="",
is_guest=False):
""" Get data from a room.
Args:
event : The room path event
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id)
if membership == Membership.JOIN:
data = yield self.state_handler.get_current_state(
room_id, event_type, state_key)
elif membership == Membership.LEAVE:
key = (event_type, state_key)
room_state = yield self.store.get_state_for_events(
[membership_event_id], [key])
data = room_state[membership_event_id].get(key)
defer.returnValue(data)
@defer.inlineCallbacks
def _check_in_room_or_world_readable(self, room_id, user_id):
try:
# check_user_was_in_room will return the most recent membership
# event for the user if:
# * The user is a non-guest user, and was ever in the room
# * The user is a guest user, and has joined the room
# else it will throw.
member_event = yield self.auth.check_user_was_in_room(
room_id, user_id)
defer.returnValue((member_event.membership, member_event.event_id))
return
except AuthError:
visibility = yield self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, "")
if (visibility and visibility.content["history_visibility"]
== "world_readable"):
defer.returnValue((Membership.JOIN, None))
return
raise AuthError(403,
"Guest access not allowed",
errcode=Codes.GUEST_ACCESS_FORBIDDEN)
@defer.inlineCallbacks
def get_state_events(self, user_id, room_id, is_guest=False):
"""Retrieve all state events for a given room. If the user is
joined to the room then return the current state. If the user has
left the room return the state events from when they left.
Args:
user_id(str): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A list of dicts representing state events. [{}, {}, {}]
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id)
if membership == Membership.JOIN:
room_state = yield self.state_handler.get_current_state(room_id)
elif membership == Membership.LEAVE:
room_state = yield self.store.get_state_for_events(
[membership_event_id], None)
room_state = room_state[membership_event_id]
now = self.clock.time_msec()
defer.returnValue(
[serialize_event(c, now) for c in room_state.values()])
@defer.inlineCallbacks
def get_joined_members(self, requester, room_id):
"""Get all the joined members in the room and their profile information.
If the user has left the room return the state events from when they left.
Args:
requester(Requester): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A dict of user_id to profile info
"""
user_id = requester.user.to_string()
if not requester.app_service:
# We check AS auth after fetching the room membership, as it
# requires us to pull out all joined members anyway.
membership, _ = yield self._check_in_room_or_world_readable(
room_id, user_id)
if membership != Membership.JOIN:
raise NotImplementedError(
"Getting joined members after leaving is not implemented")
users_with_profile = yield self.state.get_current_user_in_room(room_id)
# If this is an AS, double check that they are allowed to see the members.
# This can either be because the AS user is in the room or becuase there
# is a user in the room that the AS is "interested in"
if requester.app_service and user_id not in users_with_profile:
for uid in users_with_profile:
if requester.app_service.is_interested_in_user(uid):
break
else:
# Loop fell through, AS has no interested users in room
raise AuthError(403, "Appservice not in room")
defer.returnValue({
user_id: {
"avatar_url": profile.avatar_url,
"display_name": profile.display_name,
}
for user_id, profile in users_with_profile.iteritems()
})
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.pagination_lock = ReadWriteLock()
# We arbitrarily limit concurrent event creation for a room to 5.
# This is to stop us from diverging history *too* much.
self.limiter = Limiter(max_count=5)
@defer.inlineCallbacks
def purge_history(self, room_id, event_id):
event = yield self.store.get_event(event_id)
if event.room_id != room_id:
raise SynapseError(400, "Event is for wrong room.")
depth = event.depth
with (yield self.pagination_lock.write(room_id)):
yield self.store.delete_old_state(room_id, depth)
@defer.inlineCallbacks
def get_messages(self,
requester,
room_id=None,
pagin_config=None,
as_client_event=True,
event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id))
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token))
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk":
[serialize_event(e, time_now, as_client_event) for e in events],
"start":
pagin_config.from_token.to_string(),
"end":
next_token.to_string(),
}
defer.returnValue(chunk)
@defer.inlineCallbacks
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.
Creates an FrozenEvent object, filling out auth_events, prev_events,
etc.
Adds display names to Join membership events.
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
"""
builder = self.event_builder_factory.new(event_dict)
with (yield self.limiter.queue(builder.room_id)):
self.validator.validate_new(builder)
if builder.type == EventTypes.Member:
membership = builder.content.get("membership", None)
target = UserID.from_string(builder.state_key)
if membership in {Membership.JOIN, Membership.INVITE}:
# If event doesn't include a display name, add one.
profile = self.hs.get_handlers().profile_handler
content = builder.content
try:
if "displayname" not in content:
content[
"displayname"] = yield profile.get_displayname(
target)
if "avatar_url" not in content:
content[
"avatar_url"] = yield profile.get_avatar_url(
target)
except Exception as e:
logger.info(
"Failed to get profile information for %r: %s",
target, e)
if token_id is not None:
builder.internal_metadata.token_id = token_id
if txn_id is not None:
builder.internal_metadata.txn_id = txn_id
event, context = yield self._create_new_client_event(
builder=builder,
prev_event_ids=prev_event_ids,
)
defer.returnValue((event, context))
@defer.inlineCallbacks
def send_nonmember_event(self, requester, event, context, ratelimit=True):
"""
Persists and notifies local clients and federation of an event.
Args:
event (FrozenEvent) the event to send.
context (Context) the context of the event.
ratelimit (bool): Whether to rate limit this send.
is_guest (bool): Whether the sender is a guest.
"""
if event.type == EventTypes.Member:
raise SynapseError(
500, "Tried to send member event through non-member codepath")
# We check here if we are currently being rate limited, so that we
# don't do unnecessary work. We check again just before we actually
# send the event.
time_now = self.clock.time()
allowed, time_allowed = self.ratelimiter.send_message(
event.sender,
time_now,
msg_rate_hz=self.hs.config.rc_messages_per_second,
burst_count=self.hs.config.rc_message_burst_count,
update=False,
)
if not allowed:
raise LimitExceededError(retry_after_ms=int(
1000 * (time_allowed - time_now)), )
user = UserID.from_string(event.sender)
assert self.hs.is_mine(user), "User must be our own: %s" % (user, )
if event.is_state():
prev_state = yield self.deduplicate_state_event(event, context)
if prev_state is not None:
defer.returnValue(prev_state)
yield self.handle_new_client_event(
requester=requester,
event=event,
context=context,
ratelimit=ratelimit,
)
if event.type == EventTypes.Message:
presence = self.hs.get_presence_handler()
# We don't want to block sending messages on any presence code. This
# matters as sometimes presence code can take a while.
preserve_fn(presence.bump_presence_active_time)(user)
@defer.inlineCallbacks
def deduplicate_state_event(self, event, context):
"""
Checks whether event is in the latest resolved state in context.
If so, returns the version of the event in context.
Otherwise, returns None.
"""
prev_event_id = context.prev_state_ids.get(
(event.type, event.state_key))
prev_event = yield self.store.get_event(prev_event_id, allow_none=True)
if not prev_event:
return
if prev_event and event.user_id == prev_event.user_id:
prev_content = encode_canonical_json(prev_event.content)
next_content = encode_canonical_json(event.content)
if prev_content == next_content:
defer.returnValue(prev_event)
return
@defer.inlineCallbacks
def create_and_send_nonmember_event(self,
requester,
event_dict,
ratelimit=True,
txn_id=None):
"""
Creates an event, then sends it.
See self.create_event and self.send_nonmember_event.
"""
event, context = yield self.create_event(
event_dict, token_id=requester.access_token_id, txn_id=txn_id)
yield self.send_nonmember_event(
requester,
event,
context,
ratelimit=ratelimit,
)
defer.returnValue(event)
@defer.inlineCallbacks
def get_room_data(self,
user_id=None,
room_id=None,
event_type=None,
state_key="",
is_guest=False):
""" Get data from a room.
Args:
event : The room path event
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id)
if membership == Membership.JOIN:
data = yield self.state_handler.get_current_state(
room_id, event_type, state_key)
elif membership == Membership.LEAVE:
key = (event_type, state_key)
room_state = yield self.store.get_state_for_events(
[membership_event_id], [key])
data = room_state[membership_event_id].get(key)
defer.returnValue(data)
@defer.inlineCallbacks
def _check_in_room_or_world_readable(self, room_id, user_id):
try:
# check_user_was_in_room will return the most recent membership
# event for the user if:
# * The user is a non-guest user, and was ever in the room
# * The user is a guest user, and has joined the room
# else it will throw.
member_event = yield self.auth.check_user_was_in_room(
room_id, user_id)
defer.returnValue((member_event.membership, member_event.event_id))
return
except AuthError:
visibility = yield self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, "")
if (visibility and visibility.content["history_visibility"]
== "world_readable"):
defer.returnValue((Membership.JOIN, None))
return
raise AuthError(403,
"Guest access not allowed",
errcode=Codes.GUEST_ACCESS_FORBIDDEN)
@defer.inlineCallbacks
def get_state_events(self, user_id, room_id, is_guest=False):
"""Retrieve all state events for a given room. If the user is
joined to the room then return the current state. If the user has
left the room return the state events from when they left.
Args:
user_id(str): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A list of dicts representing state events. [{}, {}, {}]
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id)
if membership == Membership.JOIN:
room_state = yield self.state_handler.get_current_state(room_id)
elif membership == Membership.LEAVE:
room_state = yield self.store.get_state_for_events(
[membership_event_id], None)
room_state = room_state[membership_event_id]
now = self.clock.time_msec()
defer.returnValue(
[serialize_event(c, now) for c in room_state.values()])
@measure_func("_create_new_client_event")
@defer.inlineCallbacks
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:
latest_ret = yield self.store.get_latest_event_ids_and_hashes_in_room(
builder.room_id, )
# We want to limit the max number of prev events we point to in our
# new event
if len(latest_ret) > 10:
# Sort by reverse depth, so we point to the most recent.
latest_ret.sort(key=lambda a: -a[2])
new_latest_ret = latest_ret[:5]
# We also randomly point to some of the older events, to make
# sure that we don't completely ignore the older events.
if latest_ret[5:]:
sample_size = min(5, len(latest_ret[5:]))
new_latest_ret.extend(
random.sample(latest_ret[5:], sample_size))
latest_ret = new_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
state_handler = self.state_handler
context = yield state_handler.compute_event_context(builder)
if builder.is_state():
builder.prev_state = yield self.store.add_event_hashes(
context.prev_state_events)
yield self.auth.add_auth_events(builder, context)
signing_key = self.hs.config.signing_key[0]
add_hashes_and_signatures(builder, self.server_name, signing_key)
event = builder.build()
logger.debug(
"Created event %s with state: %s",
event.event_id,
context.prev_state_ids,
)
defer.returnValue((
event,
context,
))
@measure_func("handle_new_client_event")
@defer.inlineCallbacks
def handle_new_client_event(self,
requester,
event,
context,
ratelimit=True,
extra_users=[]):
# We now need to go and hit out to wherever we need to hit out to.
if ratelimit:
self.ratelimit(requester)
try:
yield self.auth.check_from_context(event, context)
except AuthError as err:
logger.warn("Denying new event %r because %s", event, err)
raise err
yield self.maybe_kick_guest_users(event, context)
if event.type == EventTypes.CanonicalAlias:
# Check the alias is acually valid (at this time at least)
room_alias_str = event.content.get("alias", None)
if room_alias_str:
room_alias = RoomAlias.from_string(room_alias_str)
directory_handler = self.hs.get_handlers().directory_handler
mapping = yield directory_handler.get_association(room_alias)
if mapping["room_id"] != event.room_id:
raise SynapseError(
400, "Room alias %s does not point to the room" %
(room_alias_str, ))
federation_handler = self.hs.get_handlers().federation_handler
if event.type == EventTypes.Member:
if event.content["membership"] == Membership.INVITE:
def is_inviter_member_event(e):
return (e.type == EventTypes.Member
and e.sender == event.sender)
state_to_include_ids = [
e_id for k, e_id in context.current_state_ids.items()
if k[0] in self.hs.config.room_invite_state_types
or k[0] == EventTypes.Member and k[1] == event.sender
]
state_to_include = yield self.store.get_events(
state_to_include_ids)
event.unsigned["invite_room_state"] = [{
"type": e.type,
"state_key": e.state_key,
"content": e.content,
"sender": e.sender,
} for e in state_to_include.values()]
invitee = UserID.from_string(event.state_key)
if not self.hs.is_mine(invitee):
# TODO: Can we add signature from remote server in a nicer
# way? If we have been invited by a remote server, we need
# to get them to sign the event.
returned_invite = yield federation_handler.send_invite(
invitee.domain,
event,
)
event.unsigned.pop("room_state", None)
# TODO: Make sure the signatures actually are correct.
event.signatures.update(returned_invite.signatures)
if event.type == EventTypes.Redaction:
auth_events_ids = yield self.auth.compute_auth_events(
event,
context.prev_state_ids,
for_verification=True,
)
auth_events = yield self.store.get_events(auth_events_ids)
auth_events = {(e.type, e.state_key): e
for e in auth_events.values()}
if self.auth.check_redaction(event, auth_events=auth_events):
original_event = yield self.store.get_event(
event.redacts,
check_redacted=False,
get_prev_content=False,
allow_rejected=False,
allow_none=False)
if event.user_id != original_event.user_id:
raise AuthError(
403, "You don't have permission to redact events")
if event.type == EventTypes.Create and context.prev_state_ids:
raise AuthError(
403,
"Changing the room create event is forbidden",
)
action_generator = ActionGenerator(self.hs)
yield action_generator.handle_push_actions_for_event(event, context)
(event_stream_id,
max_stream_id) = yield self.store.persist_event(event,
context=context)
# this intentionally does not yield: we don't care about the result
# and don't need to wait for it.
preserve_fn(self.hs.get_pusherpool().on_new_notifications)(
event_stream_id, max_stream_id)
@defer.inlineCallbacks
def _notify():
yield run_on_reactor()
yield self.notifier.on_new_room_event(event,
event_stream_id,
max_stream_id,
extra_users=extra_users)
preserve_fn(_notify)()
# If invite, remove room_state from unsigned before sending.
event.unsigned.pop("invite_room_state", None)
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.snapshot_cache = SnapshotCache()
self.pagination_lock = ReadWriteLock()
@defer.inlineCallbacks
def purge_history(self, room_id, event_id):
event = yield self.store.get_event(event_id)
if event.room_id != room_id:
raise SynapseError(400, "Event is for wrong room.")
depth = event.depth
with (yield self.pagination_lock.write(room_id)):
yield self.store.delete_old_state(room_id, depth)
@defer.inlineCallbacks
def get_messages(self, requester, room_id=None, pagin_config=None,
as_client_event=True, event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token(
direction='b'
)
)
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token)
)
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream
)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo
)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key
)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk": [
serialize_event(e, time_now, as_client_event)
for e in events
],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
}
defer.returnValue(chunk)
@defer.inlineCallbacks
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.
Creates an FrozenEvent object, filling out auth_events, prev_events,
etc.
Adds display names to Join membership events.
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
"""
builder = self.event_builder_factory.new(event_dict)
self.validator.validate_new(builder)
if builder.type == EventTypes.Member:
membership = builder.content.get("membership", None)
target = UserID.from_string(builder.state_key)
if membership in {Membership.JOIN, Membership.INVITE}:
# If event doesn't include a display name, add one.
profile = self.hs.get_handlers().profile_handler
content = builder.content
try:
content["displayname"] = yield profile.get_displayname(target)
content["avatar_url"] = yield profile.get_avatar_url(target)
except Exception as e:
logger.info(
"Failed to get profile information for %r: %s",
target, e
)
if token_id is not None:
builder.internal_metadata.token_id = token_id
if txn_id is not None:
builder.internal_metadata.txn_id = txn_id
event, context = yield self._create_new_client_event(
builder=builder,
prev_event_ids=prev_event_ids,
)
defer.returnValue((event, context))
@defer.inlineCallbacks
def send_nonmember_event(self, requester, event, context, ratelimit=True):
"""
Persists and notifies local clients and federation of an event.
Args:
event (FrozenEvent) the event to send.
context (Context) the context of the event.
ratelimit (bool): Whether to rate limit this send.
is_guest (bool): Whether the sender is a guest.
"""
if event.type == EventTypes.Member:
raise SynapseError(
500,
"Tried to send member event through non-member codepath"
)
user = UserID.from_string(event.sender)
assert self.hs.is_mine(user), "User must be our own: %s" % (user,)
if event.is_state():
prev_state = yield self.deduplicate_state_event(event, context)
if prev_state is not None:
defer.returnValue(prev_state)
yield self.handle_new_client_event(
requester=requester,
event=event,
context=context,
ratelimit=ratelimit,
)
if event.type == EventTypes.Message:
presence = self.hs.get_presence_handler()
yield presence.bump_presence_active_time(user)
@defer.inlineCallbacks
def deduplicate_state_event(self, event, context):
"""
Checks whether event is in the latest resolved state in context.
If so, returns the version of the event in context.
Otherwise, returns None.
"""
prev_event_id = context.prev_state_ids.get((event.type, event.state_key))
prev_event = yield self.store.get_event(prev_event_id, allow_none=True)
if not prev_event:
return
if prev_event and event.user_id == prev_event.user_id:
prev_content = encode_canonical_json(prev_event.content)
next_content = encode_canonical_json(event.content)
if prev_content == next_content:
defer.returnValue(prev_event)
return
@defer.inlineCallbacks
def create_and_send_nonmember_event(
self,
requester,
event_dict,
ratelimit=True,
txn_id=None
):
"""
Creates an event, then sends it.
See self.create_event and self.send_nonmember_event.
"""
event, context = yield self.create_event(
event_dict,
token_id=requester.access_token_id,
txn_id=txn_id
)
yield self.send_nonmember_event(
requester,
event,
context,
ratelimit=ratelimit,
)
defer.returnValue(event)
@defer.inlineCallbacks
def get_room_data(self, user_id=None, room_id=None,
event_type=None, state_key="", is_guest=False):
""" Get data from a room.
Args:
event : The room path event
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
data = yield self.state_handler.get_current_state(
room_id, event_type, state_key
)
elif membership == Membership.LEAVE:
key = (event_type, state_key)
room_state = yield self.store.get_state_for_events(
[membership_event_id], [key]
)
data = room_state[membership_event_id].get(key)
defer.returnValue(data)
@defer.inlineCallbacks
def _check_in_room_or_world_readable(self, room_id, user_id):
try:
# check_user_was_in_room will return the most recent membership
# event for the user if:
# * The user is a non-guest user, and was ever in the room
# * The user is a guest user, and has joined the room
# else it will throw.
member_event = yield self.auth.check_user_was_in_room(room_id, user_id)
defer.returnValue((member_event.membership, member_event.event_id))
return
except AuthError:
visibility = yield self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, ""
)
if (
visibility and
visibility.content["history_visibility"] == "world_readable"
):
defer.returnValue((Membership.JOIN, None))
return
raise AuthError(
403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN
)
@defer.inlineCallbacks
def get_state_events(self, user_id, room_id, is_guest=False):
"""Retrieve all state events for a given room. If the user is
joined to the room then return the current state. If the user has
left the room return the state events from when they left.
Args:
user_id(str): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A list of dicts representing state events. [{}, {}, {}]
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
room_state = yield self.state_handler.get_current_state(room_id)
elif membership == Membership.LEAVE:
room_state = yield self.store.get_state_for_events(
[membership_event_id], None
)
room_state = room_state[membership_event_id]
now = self.clock.time_msec()
defer.returnValue(
[serialize_event(c, now) for c in room_state.values()]
)
def snapshot_all_rooms(self, user_id=None, pagin_config=None,
as_client_event=True, include_archived=False):
"""Retrieve a snapshot of all rooms the user is invited or has joined.
This snapshot may include messages for all rooms where the user is
joined, depending on the pagination config.
Args:
user_id (str): The ID of the user making the request.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config used to determine how many messages *PER ROOM* to return.
as_client_event (bool): True to get events in client-server format.
include_archived (bool): True to get rooms that the user has left
Returns:
A list of dicts with "room_id" and "membership" keys for all rooms
the user is currently invited or joined in on. Rooms where the user
is joined on, may return a "messages" key with messages, depending
on the specified PaginationConfig.
"""
key = (
user_id,
pagin_config.from_token,
pagin_config.to_token,
pagin_config.direction,
pagin_config.limit,
as_client_event,
include_archived,
)
now_ms = self.clock.time_msec()
result = self.snapshot_cache.get(now_ms, key)
if result is not None:
return result
return self.snapshot_cache.set(now_ms, key, self._snapshot_all_rooms(
user_id, pagin_config, as_client_event, include_archived
))
@defer.inlineCallbacks
def _snapshot_all_rooms(self, user_id=None, pagin_config=None,
as_client_event=True, include_archived=False):
memberships = [Membership.INVITE, Membership.JOIN]
if include_archived:
memberships.append(Membership.LEAVE)
room_list = yield self.store.get_rooms_for_user_where_membership_is(
user_id=user_id, membership_list=memberships
)
user = UserID.from_string(user_id)
rooms_ret = []
now_token = yield self.hs.get_event_sources().get_current_token()
presence_stream = self.hs.get_event_sources().sources["presence"]
pagination_config = PaginationConfig(from_token=now_token)
presence, _ = yield presence_stream.get_pagination_rows(
user, pagination_config.get_source_config("presence"), None
)
receipt_stream = self.hs.get_event_sources().sources["receipt"]
receipt, _ = yield receipt_stream.get_pagination_rows(
user, pagination_config.get_source_config("receipt"), None
)
tags_by_room = yield self.store.get_tags_for_user(user_id)
account_data, account_data_by_room = (
yield self.store.get_account_data_for_user(user_id)
)
public_room_ids = yield self.store.get_public_room_ids()
limit = pagin_config.limit
if limit is None:
limit = 10
@defer.inlineCallbacks
def handle_room(event):
d = {
"room_id": event.room_id,
"membership": event.membership,
"visibility": (
"public" if event.room_id in public_room_ids
else "private"
),
}
if event.membership == Membership.INVITE:
time_now = self.clock.time_msec()
d["inviter"] = event.sender
invite_event = yield self.store.get_event(event.event_id)
d["invite"] = serialize_event(invite_event, time_now, as_client_event)
rooms_ret.append(d)
if event.membership not in (Membership.JOIN, Membership.LEAVE):
return
try:
if event.membership == Membership.JOIN:
room_end_token = now_token.room_key
deferred_room_state = self.state_handler.get_current_state(
event.room_id
)
elif event.membership == Membership.LEAVE:
room_end_token = "s%d" % (event.stream_ordering,)
deferred_room_state = self.store.get_state_for_events(
[event.event_id], None
)
deferred_room_state.addCallback(
lambda states: states[event.event_id]
)
(messages, token), current_state = yield preserve_context_over_deferred(
defer.gatherResults(
[
preserve_fn(self.store.get_recent_events_for_room)(
event.room_id,
limit=limit,
end_token=room_end_token,
),
deferred_room_state,
]
)
).addErrback(unwrapFirstError)
messages = yield filter_events_for_client(
self.store, user_id, messages
)
start_token = now_token.copy_and_replace("room_key", token[0])
end_token = now_token.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
d["messages"] = {
"chunk": [
serialize_event(m, time_now, as_client_event)
for m in messages
],
"start": start_token.to_string(),
"end": end_token.to_string(),
}
d["state"] = [
serialize_event(c, time_now, as_client_event)
for c in current_state.values()
]
account_data_events = []
tags = tags_by_room.get(event.room_id)
if tags:
account_data_events.append({
"type": "m.tag",
"content": {"tags": tags},
})
account_data = account_data_by_room.get(event.room_id, {})
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
d["account_data"] = account_data_events
except:
logger.exception("Failed to get snapshot")
yield concurrently_execute(handle_room, room_list, 10)
account_data_events = []
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
ret = {
"rooms": rooms_ret,
"presence": presence,
"account_data": account_data_events,
"receipts": receipt,
"end": now_token.to_string(),
}
defer.returnValue(ret)
@defer.inlineCallbacks
def room_initial_sync(self, requester, room_id, pagin_config=None):
"""Capture the a snapshot of a room. If user is currently a member of
the room this will be what is currently in the room. If the user left
the room this will be what was in the room when they left.
Args:
requester(Requester): The user to get a snapshot for.
room_id(str): The room to get a snapshot of.
pagin_config(synapse.streams.config.PaginationConfig):
The pagination config used to determine how many messages to
return.
Raises:
AuthError if the user wasn't in the room.
Returns:
A JSON serialisable dict with the snapshot of the room.
"""
user_id = requester.user.to_string()
membership, member_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id,
)
is_peeking = member_event_id is None
if membership == Membership.JOIN:
result = yield self._room_initial_sync_joined(
user_id, room_id, pagin_config, membership, is_peeking
)
elif membership == Membership.LEAVE:
result = yield self._room_initial_sync_parted(
user_id, room_id, pagin_config, membership, member_event_id, is_peeking
)
account_data_events = []
tags = yield self.store.get_tags_for_room(user_id, room_id)
if tags:
account_data_events.append({
"type": "m.tag",
"content": {"tags": tags},
})
account_data = yield self.store.get_account_data_for_room(user_id, room_id)
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
result["account_data"] = account_data_events
defer.returnValue(result)
@defer.inlineCallbacks
def _room_initial_sync_parted(self, user_id, room_id, pagin_config,
membership, member_event_id, is_peeking):
room_state = yield self.store.get_state_for_events(
[member_event_id], None
)
room_state = room_state[member_event_id]
limit = pagin_config.limit if pagin_config else None
if limit is None:
limit = 10
stream_token = yield self.store.get_stream_token_for_event(
member_event_id
)
messages, token = yield self.store.get_recent_events_for_room(
room_id,
limit=limit,
end_token=stream_token
)
messages = yield filter_events_for_client(
self.store, user_id, messages, is_peeking=is_peeking
)
start_token = StreamToken.START.copy_and_replace("room_key", token[0])
end_token = StreamToken.START.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
defer.returnValue({
"membership": membership,
"room_id": room_id,
"messages": {
"chunk": [serialize_event(m, time_now) for m in messages],
"start": start_token.to_string(),
"end": end_token.to_string(),
},
"state": [serialize_event(s, time_now) for s in room_state.values()],
"presence": [],
"receipts": [],
})
@defer.inlineCallbacks
def _room_initial_sync_joined(self, user_id, room_id, pagin_config,
membership, is_peeking):
current_state = yield self.state.get_current_state(
room_id=room_id,
)
# TODO: These concurrently
time_now = self.clock.time_msec()
state = [
serialize_event(x, time_now)
for x in current_state.values()
]
now_token = yield self.hs.get_event_sources().get_current_token()
limit = pagin_config.limit if pagin_config else None
if limit is None:
limit = 10
room_members = [
m for m in current_state.values()
if m.type == EventTypes.Member
and m.content["membership"] == Membership.JOIN
]
presence_handler = self.hs.get_presence_handler()
@defer.inlineCallbacks
def get_presence():
states = yield presence_handler.get_states(
[m.user_id for m in room_members],
as_event=True,
)
defer.returnValue(states)
@defer.inlineCallbacks
def get_receipts():
receipts_handler = self.hs.get_handlers().receipts_handler
receipts = yield receipts_handler.get_receipts_for_room(
room_id,
now_token.receipt_key
)
defer.returnValue(receipts)
presence, receipts, (messages, token) = yield defer.gatherResults(
[
preserve_fn(get_presence)(),
preserve_fn(get_receipts)(),
preserve_fn(self.store.get_recent_events_for_room)(
room_id,
limit=limit,
end_token=now_token.room_key,
)
],
consumeErrors=True,
).addErrback(unwrapFirstError)
messages = yield filter_events_for_client(
self.store, user_id, messages, is_peeking=is_peeking,
)
start_token = now_token.copy_and_replace("room_key", token[0])
end_token = now_token.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
ret = {
"room_id": room_id,
"messages": {
"chunk": [serialize_event(m, time_now) for m in messages],
"start": start_token.to_string(),
"end": end_token.to_string(),
},
"state": state,
"presence": presence,
"receipts": receipts,
}
if not is_peeking:
ret["membership"] = membership
defer.returnValue(ret)
@measure_func("_create_new_client_event")
@defer.inlineCallbacks
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:
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
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
state_handler = self.state_handler
context = yield state_handler.compute_event_context(builder)
if builder.is_state():
builder.prev_state = yield self.store.add_event_hashes(
context.prev_state_events
)
yield self.auth.add_auth_events(builder, context)
signing_key = self.hs.config.signing_key[0]
add_hashes_and_signatures(
builder, self.server_name, signing_key
)
event = builder.build()
logger.debug(
"Created event %s with state: %s",
event.event_id, context.prev_state_ids,
)
defer.returnValue(
(event, context,)
)
@measure_func("handle_new_client_event")
@defer.inlineCallbacks
def handle_new_client_event(
self,
requester,
event,
context,
ratelimit=True,
extra_users=[]
):
# We now need to go and hit out to wherever we need to hit out to.
if ratelimit:
self.ratelimit(requester)
try:
yield self.auth.check_from_context(event, context)
except AuthError as err:
logger.warn("Denying new event %r because %s", event, err)
raise err
yield self.maybe_kick_guest_users(event, context)
if event.type == EventTypes.CanonicalAlias:
# Check the alias is acually valid (at this time at least)
room_alias_str = event.content.get("alias", None)
if room_alias_str:
room_alias = RoomAlias.from_string(room_alias_str)
directory_handler = self.hs.get_handlers().directory_handler
mapping = yield directory_handler.get_association(room_alias)
if mapping["room_id"] != event.room_id:
raise SynapseError(
400,
"Room alias %s does not point to the room" % (
room_alias_str,
)
)
federation_handler = self.hs.get_handlers().federation_handler
if event.type == EventTypes.Member:
if event.content["membership"] == Membership.INVITE:
def is_inviter_member_event(e):
return (
e.type == EventTypes.Member and
e.sender == event.sender
)
state_to_include_ids = [
e_id
for k, e_id in context.current_state_ids.items()
if k[0] in self.hs.config.room_invite_state_types
or k[0] == EventTypes.Member and k[1] == event.sender
]
state_to_include = yield self.store.get_events(state_to_include_ids)
event.unsigned["invite_room_state"] = [
{
"type": e.type,
"state_key": e.state_key,
"content": e.content,
"sender": e.sender,
}
for e in state_to_include.values()
]
invitee = UserID.from_string(event.state_key)
if not self.hs.is_mine(invitee):
# TODO: Can we add signature from remote server in a nicer
# way? If we have been invited by a remote server, we need
# to get them to sign the event.
returned_invite = yield federation_handler.send_invite(
invitee.domain,
event,
)
event.unsigned.pop("room_state", None)
# TODO: Make sure the signatures actually are correct.
event.signatures.update(
returned_invite.signatures
)
if event.type == EventTypes.Redaction:
auth_events_ids = yield self.auth.compute_auth_events(
event, context.prev_state_ids, for_verification=True,
)
auth_events = yield self.store.get_events(auth_events_ids)
auth_events = {
(e.type, e.state_key): e for e in auth_events.values()
}
if self.auth.check_redaction(event, auth_events=auth_events):
original_event = yield self.store.get_event(
event.redacts,
check_redacted=False,
get_prev_content=False,
allow_rejected=False,
allow_none=False
)
if event.user_id != original_event.user_id:
raise AuthError(
403,
"You don't have permission to redact events"
)
if event.type == EventTypes.Create and context.prev_state_ids:
raise AuthError(
403,
"Changing the room create event is forbidden",
)
action_generator = ActionGenerator(self.hs)
yield action_generator.handle_push_actions_for_event(
event, context
)
(event_stream_id, max_stream_id) = yield self.store.persist_event(
event, context=context
)
# this intentionally does not yield: we don't care about the result
# and don't need to wait for it.
preserve_fn(self.hs.get_pusherpool().on_new_notifications)(
event_stream_id, max_stream_id
)
users_in_room = yield self.store.get_joined_users_from_context(event, context)
destinations = [
get_domain_from_id(user_id) for user_id in users_in_room
if not self.hs.is_mine_id(user_id)
]
@defer.inlineCallbacks
def _notify():
yield run_on_reactor()
yield self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
preserve_fn(_notify)()
# If invite, remove room_state from unsigned before sending.
event.unsigned.pop("invite_room_state", None)
preserve_fn(federation_handler.handle_new_event)(
event, destinations=destinations,
)
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.validator = EventValidator()
self.snapshot_cache = SnapshotCache()
self.pagination_lock = ReadWriteLock()
@defer.inlineCallbacks
def purge_history(self, room_id, event_id):
event = yield self.store.get_event(event_id)
if event.room_id != room_id:
raise SynapseError(400, "Event is for wrong room.")
depth = event.depth
with (yield self.pagination_lock.write(room_id)):
yield self.store.delete_old_state(room_id, depth)
@defer.inlineCallbacks
def get_messages(self, requester, room_id=None, pagin_config=None,
as_client_event=True, event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token(
direction='b'
)
)
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token)
)
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream
)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo
)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key
)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk": [
serialize_event(e, time_now, as_client_event)
for e in events
],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
}
defer.returnValue(chunk)
@defer.inlineCallbacks
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.
Creates an FrozenEvent object, filling out auth_events, prev_events,
etc.
Adds display names to Join membership events.
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
"""
builder = self.event_builder_factory.new(event_dict)
self.validator.validate_new(builder)
if builder.type == EventTypes.Member:
membership = builder.content.get("membership", None)
target = UserID.from_string(builder.state_key)
if membership in {Membership.JOIN, Membership.INVITE}:
# If event doesn't include a display name, add one.
profile = self.hs.get_handlers().profile_handler
content = builder.content
try:
content["displayname"] = yield profile.get_displayname(target)
content["avatar_url"] = yield profile.get_avatar_url(target)
except Exception as e:
logger.info(
"Failed to get profile information for %r: %s",
target, e
)
if token_id is not None:
builder.internal_metadata.token_id = token_id
if txn_id is not None:
builder.internal_metadata.txn_id = txn_id
event, context = yield self._create_new_client_event(
builder=builder,
prev_event_ids=prev_event_ids,
)
defer.returnValue((event, context))
@defer.inlineCallbacks
def send_nonmember_event(self, requester, event, context, ratelimit=True):
"""
Persists and notifies local clients and federation of an event.
Args:
event (FrozenEvent) the event to send.
context (Context) the context of the event.
ratelimit (bool): Whether to rate limit this send.
is_guest (bool): Whether the sender is a guest.
"""
if event.type == EventTypes.Member:
raise SynapseError(
500,
"Tried to send member event through non-member codepath"
)
user = UserID.from_string(event.sender)
assert self.hs.is_mine(user), "User must be our own: %s" % (user,)
if event.is_state():
prev_state = self.deduplicate_state_event(event, context)
if prev_state is not None:
defer.returnValue(prev_state)
yield self.handle_new_client_event(
requester=requester,
event=event,
context=context,
ratelimit=ratelimit,
)
if event.type == EventTypes.Message:
presence = self.hs.get_presence_handler()
yield presence.bump_presence_active_time(user)
def deduplicate_state_event(self, event, context):
"""
Checks whether event is in the latest resolved state in context.
If so, returns the version of the event in context.
Otherwise, returns None.
"""
prev_event = context.current_state.get((event.type, event.state_key))
if prev_event and event.user_id == prev_event.user_id:
prev_content = encode_canonical_json(prev_event.content)
next_content = encode_canonical_json(event.content)
if prev_content == next_content:
return prev_event
return None
@defer.inlineCallbacks
def create_and_send_nonmember_event(
self,
requester,
event_dict,
ratelimit=True,
txn_id=None
):
"""
Creates an event, then sends it.
See self.create_event and self.send_nonmember_event.
"""
event, context = yield self.create_event(
event_dict,
token_id=requester.access_token_id,
txn_id=txn_id
)
yield self.send_nonmember_event(
requester,
event,
context,
ratelimit=ratelimit,
)
defer.returnValue(event)
@defer.inlineCallbacks
def get_room_data(self, user_id=None, room_id=None,
event_type=None, state_key="", is_guest=False):
""" Get data from a room.
Args:
event : The room path event
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
data = yield self.state_handler.get_current_state(
room_id, event_type, state_key
)
elif membership == Membership.LEAVE:
key = (event_type, state_key)
room_state = yield self.store.get_state_for_events(
[membership_event_id], [key]
)
data = room_state[membership_event_id].get(key)
defer.returnValue(data)
@defer.inlineCallbacks
def _check_in_room_or_world_readable(self, room_id, user_id):
try:
# check_user_was_in_room will return the most recent membership
# event for the user if:
# * The user is a non-guest user, and was ever in the room
# * The user is a guest user, and has joined the room
# else it will throw.
member_event = yield self.auth.check_user_was_in_room(room_id, user_id)
defer.returnValue((member_event.membership, member_event.event_id))
return
except AuthError:
visibility = yield self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, ""
)
if (
visibility and
visibility.content["history_visibility"] == "world_readable"
):
defer.returnValue((Membership.JOIN, None))
return
raise AuthError(
403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN
)
@defer.inlineCallbacks
def get_state_events(self, user_id, room_id, is_guest=False):
"""Retrieve all state events for a given room. If the user is
joined to the room then return the current state. If the user has
left the room return the state events from when they left.
Args:
user_id(str): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A list of dicts representing state events. [{}, {}, {}]
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
room_state = yield self.state_handler.get_current_state(room_id)
elif membership == Membership.LEAVE:
room_state = yield self.store.get_state_for_events(
[membership_event_id], None
)
room_state = room_state[membership_event_id]
now = self.clock.time_msec()
defer.returnValue(
[serialize_event(c, now) for c in room_state.values()]
)
def snapshot_all_rooms(self, user_id=None, pagin_config=None,
as_client_event=True, include_archived=False):
"""Retrieve a snapshot of all rooms the user is invited or has joined.
This snapshot may include messages for all rooms where the user is
joined, depending on the pagination config.
Args:
user_id (str): The ID of the user making the request.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config used to determine how many messages *PER ROOM* to return.
as_client_event (bool): True to get events in client-server format.
include_archived (bool): True to get rooms that the user has left
Returns:
A list of dicts with "room_id" and "membership" keys for all rooms
the user is currently invited or joined in on. Rooms where the user
is joined on, may return a "messages" key with messages, depending
on the specified PaginationConfig.
"""
key = (
user_id,
pagin_config.from_token,
pagin_config.to_token,
pagin_config.direction,
pagin_config.limit,
as_client_event,
include_archived,
)
now_ms = self.clock.time_msec()
result = self.snapshot_cache.get(now_ms, key)
if result is not None:
return result
return self.snapshot_cache.set(now_ms, key, self._snapshot_all_rooms(
user_id, pagin_config, as_client_event, include_archived
))
@defer.inlineCallbacks
def _snapshot_all_rooms(self, user_id=None, pagin_config=None,
as_client_event=True, include_archived=False):
memberships = [Membership.INVITE, Membership.JOIN]
if include_archived:
memberships.append(Membership.LEAVE)
room_list = yield self.store.get_rooms_for_user_where_membership_is(
user_id=user_id, membership_list=memberships
)
user = UserID.from_string(user_id)
rooms_ret = []
now_token = yield self.hs.get_event_sources().get_current_token()
presence_stream = self.hs.get_event_sources().sources["presence"]
pagination_config = PaginationConfig(from_token=now_token)
presence, _ = yield presence_stream.get_pagination_rows(
user, pagination_config.get_source_config("presence"), None
)
receipt_stream = self.hs.get_event_sources().sources["receipt"]
receipt, _ = yield receipt_stream.get_pagination_rows(
user, pagination_config.get_source_config("receipt"), None
)
tags_by_room = yield self.store.get_tags_for_user(user_id)
account_data, account_data_by_room = (
yield self.store.get_account_data_for_user(user_id)
)
public_room_ids = yield self.store.get_public_room_ids()
limit = pagin_config.limit
if limit is None:
limit = 10
@defer.inlineCallbacks
def handle_room(event):
d = {
"room_id": event.room_id,
"membership": event.membership,
"visibility": (
"public" if event.room_id in public_room_ids
else "private"
),
}
if event.membership == Membership.INVITE:
time_now = self.clock.time_msec()
d["inviter"] = event.sender
invite_event = yield self.store.get_event(event.event_id)
d["invite"] = serialize_event(invite_event, time_now, as_client_event)
rooms_ret.append(d)
if event.membership not in (Membership.JOIN, Membership.LEAVE):
return
try:
if event.membership == Membership.JOIN:
room_end_token = now_token.room_key
deferred_room_state = self.state_handler.get_current_state(
event.room_id
)
elif event.membership == Membership.LEAVE:
room_end_token = "s%d" % (event.stream_ordering,)
deferred_room_state = self.store.get_state_for_events(
[event.event_id], None
)
deferred_room_state.addCallback(
lambda states: states[event.event_id]
)
(messages, token), current_state = yield defer.gatherResults(
[
self.store.get_recent_events_for_room(
event.room_id,
limit=limit,
end_token=room_end_token,
),
deferred_room_state,
]
).addErrback(unwrapFirstError)
messages = yield filter_events_for_client(
self.store, user_id, messages
)
start_token = now_token.copy_and_replace("room_key", token[0])
end_token = now_token.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
d["messages"] = {
"chunk": [
serialize_event(m, time_now, as_client_event)
for m in messages
],
"start": start_token.to_string(),
"end": end_token.to_string(),
}
d["state"] = [
serialize_event(c, time_now, as_client_event)
for c in current_state.values()
]
account_data_events = []
tags = tags_by_room.get(event.room_id)
if tags:
account_data_events.append({
"type": "m.tag",
"content": {"tags": tags},
})
account_data = account_data_by_room.get(event.room_id, {})
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
d["account_data"] = account_data_events
except:
logger.exception("Failed to get snapshot")
yield concurrently_execute(handle_room, room_list, 10)
account_data_events = []
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
ret = {
"rooms": rooms_ret,
"presence": presence,
"account_data": account_data_events,
"receipts": receipt,
"end": now_token.to_string(),
}
defer.returnValue(ret)
@defer.inlineCallbacks
def room_initial_sync(self, requester, room_id, pagin_config=None):
"""Capture the a snapshot of a room. If user is currently a member of
the room this will be what is currently in the room. If the user left
the room this will be what was in the room when they left.
Args:
requester(Requester): The user to get a snapshot for.
room_id(str): The room to get a snapshot of.
pagin_config(synapse.streams.config.PaginationConfig):
The pagination config used to determine how many messages to
return.
Raises:
AuthError if the user wasn't in the room.
Returns:
A JSON serialisable dict with the snapshot of the room.
"""
user_id = requester.user.to_string()
membership, member_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id,
)
is_peeking = member_event_id is None
if membership == Membership.JOIN:
result = yield self._room_initial_sync_joined(
user_id, room_id, pagin_config, membership, is_peeking
)
elif membership == Membership.LEAVE:
result = yield self._room_initial_sync_parted(
user_id, room_id, pagin_config, membership, member_event_id, is_peeking
)
account_data_events = []
tags = yield self.store.get_tags_for_room(user_id, room_id)
if tags:
account_data_events.append({
"type": "m.tag",
"content": {"tags": tags},
})
account_data = yield self.store.get_account_data_for_room(user_id, room_id)
for account_data_type, content in account_data.items():
account_data_events.append({
"type": account_data_type,
"content": content,
})
result["account_data"] = account_data_events
defer.returnValue(result)
@defer.inlineCallbacks
def _room_initial_sync_parted(self, user_id, room_id, pagin_config,
membership, member_event_id, is_peeking):
room_state = yield self.store.get_state_for_events(
[member_event_id], None
)
room_state = room_state[member_event_id]
limit = pagin_config.limit if pagin_config else None
if limit is None:
limit = 10
stream_token = yield self.store.get_stream_token_for_event(
member_event_id
)
messages, token = yield self.store.get_recent_events_for_room(
room_id,
limit=limit,
end_token=stream_token
)
messages = yield filter_events_for_client(
self.store, user_id, messages, is_peeking=is_peeking
)
start_token = StreamToken.START.copy_and_replace("room_key", token[0])
end_token = StreamToken.START.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
defer.returnValue({
"membership": membership,
"room_id": room_id,
"messages": {
"chunk": [serialize_event(m, time_now) for m in messages],
"start": start_token.to_string(),
"end": end_token.to_string(),
},
"state": [serialize_event(s, time_now) for s in room_state.values()],
"presence": [],
"receipts": [],
})
@defer.inlineCallbacks
def _room_initial_sync_joined(self, user_id, room_id, pagin_config,
membership, is_peeking):
current_state = yield self.state.get_current_state(
room_id=room_id,
)
# TODO: These concurrently
time_now = self.clock.time_msec()
state = [
serialize_event(x, time_now)
for x in current_state.values()
]
now_token = yield self.hs.get_event_sources().get_current_token()
limit = pagin_config.limit if pagin_config else None
if limit is None:
limit = 10
room_members = [
m for m in current_state.values()
if m.type == EventTypes.Member
and m.content["membership"] == Membership.JOIN
]
presence_handler = self.hs.get_presence_handler()
@defer.inlineCallbacks
def get_presence():
states = yield presence_handler.get_states(
[m.user_id for m in room_members],
as_event=True,
)
defer.returnValue(states)
@defer.inlineCallbacks
def get_receipts():
receipts_handler = self.hs.get_handlers().receipts_handler
receipts = yield receipts_handler.get_receipts_for_room(
room_id,
now_token.receipt_key
)
defer.returnValue(receipts)
presence, receipts, (messages, token) = yield defer.gatherResults(
[
get_presence(),
get_receipts(),
self.store.get_recent_events_for_room(
room_id,
limit=limit,
end_token=now_token.room_key,
)
],
consumeErrors=True,
).addErrback(unwrapFirstError)
messages = yield filter_events_for_client(
self.store, user_id, messages, is_peeking=is_peeking,
)
start_token = now_token.copy_and_replace("room_key", token[0])
end_token = now_token.copy_and_replace("room_key", token[1])
time_now = self.clock.time_msec()
ret = {
"room_id": room_id,
"messages": {
"chunk": [serialize_event(m, time_now) for m in messages],
"start": start_token.to_string(),
"end": end_token.to_string(),
},
"state": state,
"presence": presence,
"receipts": receipts,
}
if not is_peeking:
ret["membership"] = membership
defer.returnValue(ret)
@defer.inlineCallbacks
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:
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
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
state_handler = self.state_handler
context = yield state_handler.compute_event_context(builder)
if builder.is_state():
builder.prev_state = yield self.store.add_event_hashes(
context.prev_state_events
)
yield self.auth.add_auth_events(builder, context)
signing_key = self.hs.config.signing_key[0]
add_hashes_and_signatures(
builder, self.server_name, signing_key
)
event = builder.build()
logger.debug(
"Created event %s with current state: %s",
event.event_id, context.current_state,
)
defer.returnValue(
(event, context,)
)
@defer.inlineCallbacks
def handle_new_client_event(
self,
requester,
event,
context,
ratelimit=True,
extra_users=[]
):
# We now need to go and hit out to wherever we need to hit out to.
if ratelimit:
self.ratelimit(requester)
try:
self.auth.check(event, auth_events=context.current_state)
except AuthError as err:
logger.warn("Denying new event %r because %s", event, err)
raise err
yield self.maybe_kick_guest_users(event, context.current_state.values())
if event.type == EventTypes.CanonicalAlias:
# Check the alias is acually valid (at this time at least)
room_alias_str = event.content.get("alias", None)
if room_alias_str:
room_alias = RoomAlias.from_string(room_alias_str)
directory_handler = self.hs.get_handlers().directory_handler
mapping = yield directory_handler.get_association(room_alias)
if mapping["room_id"] != event.room_id:
raise SynapseError(
400,
"Room alias %s does not point to the room" % (
room_alias_str,
)
)
federation_handler = self.hs.get_handlers().federation_handler
if event.type == EventTypes.Member:
if event.content["membership"] == Membership.INVITE:
def is_inviter_member_event(e):
return (
e.type == EventTypes.Member and
e.sender == event.sender
)
event.unsigned["invite_room_state"] = [
{
"type": e.type,
"state_key": e.state_key,
"content": e.content,
"sender": e.sender,
}
for k, e in context.current_state.items()
if e.type in self.hs.config.room_invite_state_types
or is_inviter_member_event(e)
]
invitee = UserID.from_string(event.state_key)
if not self.hs.is_mine(invitee):
# TODO: Can we add signature from remote server in a nicer
# way? If we have been invited by a remote server, we need
# to get them to sign the event.
returned_invite = yield federation_handler.send_invite(
invitee.domain,
event,
)
event.unsigned.pop("room_state", None)
# TODO: Make sure the signatures actually are correct.
event.signatures.update(
returned_invite.signatures
)
if event.type == EventTypes.Redaction:
if self.auth.check_redaction(event, auth_events=context.current_state):
original_event = yield self.store.get_event(
event.redacts,
check_redacted=False,
get_prev_content=False,
allow_rejected=False,
allow_none=False
)
if event.user_id != original_event.user_id:
raise AuthError(
403,
"You don't have permission to redact events"
)
if event.type == EventTypes.Create and context.current_state:
raise AuthError(
403,
"Changing the room create event is forbidden",
)
action_generator = ActionGenerator(self.hs)
yield action_generator.handle_push_actions_for_event(
event, context
)
(event_stream_id, max_stream_id) = yield self.store.persist_event(
event, context=context
)
# this intentionally does not yield: we don't care about the result
# and don't need to wait for it.
preserve_fn(self.hs.get_pusherpool().on_new_notifications)(
event_stream_id, max_stream_id
)
destinations = set()
for k, s in context.current_state.items():
try:
if k[0] == EventTypes.Member:
if s.content["membership"] == Membership.JOIN:
destinations.add(get_domain_from_id(s.state_key))
except SynapseError:
logger.warn(
"Failed to get destination from event %s", s.event_id
)
@defer.inlineCallbacks
def _notify():
yield run_on_reactor()
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
preserve_fn(_notify)()
# If invite, remove room_state from unsigned before sending.
event.unsigned.pop("invite_room_state", None)
federation_handler.handle_new_event(
event, destinations=destinations,
)
class PaginationHandler(object):
"""Handles pagination and purge history requests.
These are in the same handler due to the fact we need to block clients
paginating during a purge.
"""
def __init__(self, hs):
self.hs = hs
self.auth = hs.get_auth()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def start_purge_history(self, room_id, token,
delete_local_events=False):
"""Start off a history purge on a room.
Args:
room_id (str): The room to purge from
token (str): topological token to delete events before
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
str: unique ID for this purge transaction.
"""
if room_id in self._purges_in_progress_by_room:
raise SynapseError(
400,
"History purge already in progress for %s" % (room_id, ),
)
purge_id = random_string(16)
# we log the purge_id here so that it can be tied back to the
# request id in the log lines.
logger.info("[purge] starting purge_id %s", purge_id)
self._purges_by_id[purge_id] = PurgeStatus()
run_in_background(
self._purge_history,
purge_id, room_id, token, delete_local_events,
)
return purge_id
@defer.inlineCallbacks
def _purge_history(self, purge_id, room_id, token,
delete_local_events):
"""Carry out a history purge on a room.
Args:
purge_id (str): The id for this purge
room_id (str): The room to purge from
token (str): topological token to delete events before
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
Deferred
"""
self._purges_in_progress_by_room.add(room_id)
try:
with (yield self.pagination_lock.write(room_id)):
yield self.store.purge_history(
room_id, token, delete_local_events,
)
logger.info("[purge] complete")
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE
except Exception:
logger.error("[purge] failed: %s", Failure().getTraceback().rstrip())
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED
finally:
self._purges_in_progress_by_room.discard(room_id)
# remove the purge from the list 24 hours after it completes
def clear_purge():
del self._purges_by_id[purge_id]
self.hs.get_reactor().callLater(24 * 3600, clear_purge)
def get_purge_status(self, purge_id):
"""Get the current status of an active purge
Args:
purge_id (str): purge_id returned by start_purge_history
Returns:
PurgeStatus|None
"""
return self._purges_by_id.get(purge_id)
@defer.inlineCallbacks
def get_messages(self, requester, room_id=None, pagin_config=None,
as_client_event=True, event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id
)
)
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token)
)
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield 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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream
)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo
)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key
)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk": [
serialize_event(e, time_now, as_client_event)
for e in events
],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
}
defer.returnValue(chunk)
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.pagination_lock = ReadWriteLock()
self._purges_in_progress_by_room = set()
# map from purge id to PurgeStatus
self._purges_by_id = {}
def start_purge_history(self, room_id, topological_ordering,
delete_local_events=False):
"""Start off a history purge on a room.
Args:
room_id (str): The room to purge from
topological_ordering (int): minimum topo ordering to preserve
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
str: unique ID for this purge transaction.
"""
if room_id in self._purges_in_progress_by_room:
raise SynapseError(
400,
"History purge already in progress for %s" % (room_id, ),
)
purge_id = random_string(16)
# we log the purge_id here so that it can be tied back to the
# request id in the log lines.
logger.info("[purge] starting purge_id %s", purge_id)
self._purges_by_id[purge_id] = PurgeStatus()
run_in_background(
self._purge_history,
purge_id, room_id, topological_ordering, delete_local_events,
)
return purge_id
@defer.inlineCallbacks
def _purge_history(self, purge_id, room_id, topological_ordering,
delete_local_events):
"""Carry out a history purge on a room.
Args:
purge_id (str): The id for this purge
room_id (str): The room to purge from
topological_ordering (int): minimum topo ordering to preserve
delete_local_events (bool): True to delete local events as well as
remote ones
Returns:
Deferred
"""
self._purges_in_progress_by_room.add(room_id)
try:
with (yield self.pagination_lock.write(room_id)):
yield self.store.purge_history(
room_id, topological_ordering, delete_local_events,
)
logger.info("[purge] complete")
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE
except Exception:
logger.error("[purge] failed: %s", Failure().getTraceback().rstrip())
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED
finally:
self._purges_in_progress_by_room.discard(room_id)
# 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)
def get_purge_status(self, purge_id):
"""Get the current status of an active purge
Args:
purge_id (str): purge_id returned by start_purge_history
Returns:
PurgeStatus|None
"""
return self._purges_by_id.get(purge_id)
@defer.inlineCallbacks
def get_messages(self, requester, room_id=None, pagin_config=None,
as_client_event=True, event_filter=None):
"""Get messages in a room.
Args:
requester (Requester): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
as_client_event (bool): True to get events in client-server format.
event_filter (Filter): Filter to apply to results or None
Returns:
dict: Pagination API results
"""
user_id = requester.user.to_string()
if pagin_config.from_token:
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id
)
)
room_token = pagin_config.from_token.room_key
room_token = RoomStreamToken.parse(room_token)
pagin_config.from_token = pagin_config.from_token.copy_and_replace(
"room_key", str(room_token)
)
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._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
# requires that we have a topo token.
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream
)
if membership == Membership.LEAVE:
# 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(
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(
room_id, max_topo
)
events, next_key = yield self.store.paginate_room_events(
room_id=room_id,
from_key=source_config.from_key,
to_key=source_config.to_key,
direction=source_config.direction,
limit=source_config.limit,
event_filter=event_filter,
)
next_token = pagin_config.from_token.copy_and_replace(
"room_key", next_key
)
if not events:
defer.returnValue({
"chunk": [],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
})
if event_filter:
events = event_filter.filter(events)
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
)
time_now = self.clock.time_msec()
chunk = {
"chunk": [
serialize_event(e, time_now, as_client_event)
for e in events
],
"start": pagin_config.from_token.to_string(),
"end": next_token.to_string(),
}
defer.returnValue(chunk)
@defer.inlineCallbacks
def get_room_data(self, user_id=None, room_id=None,
event_type=None, state_key="", is_guest=False):
""" Get data from a room.
Args:
event : The room path event
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
data = yield self.state_handler.get_current_state(
room_id, event_type, state_key
)
elif membership == Membership.LEAVE:
key = (event_type, state_key)
room_state = yield self.store.get_state_for_events(
[membership_event_id], [key]
)
data = room_state[membership_event_id].get(key)
defer.returnValue(data)
@defer.inlineCallbacks
def _check_in_room_or_world_readable(self, room_id, user_id):
try:
# check_user_was_in_room will return the most recent membership
# event for the user if:
# * The user is a non-guest user, and was ever in the room
# * The user is a guest user, and has joined the room
# else it will throw.
member_event = yield self.auth.check_user_was_in_room(room_id, user_id)
defer.returnValue((member_event.membership, member_event.event_id))
return
except AuthError:
visibility = yield self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, ""
)
if (
visibility and
visibility.content["history_visibility"] == "world_readable"
):
defer.returnValue((Membership.JOIN, None))
return
raise AuthError(
403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN
)
@defer.inlineCallbacks
def get_state_events(self, user_id, room_id, is_guest=False):
"""Retrieve all state events for a given room. If the user is
joined to the room then return the current state. If the user has
left the room return the state events from when they left.
Args:
user_id(str): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A list of dicts representing state events. [{}, {}, {}]
"""
membership, membership_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership == Membership.JOIN:
room_state = yield self.state_handler.get_current_state(room_id)
elif membership == Membership.LEAVE:
room_state = yield self.store.get_state_for_events(
[membership_event_id], None
)
room_state = room_state[membership_event_id]
now = self.clock.time_msec()
defer.returnValue(
[serialize_event(c, now) for c in room_state.values()]
)
@defer.inlineCallbacks
def get_joined_members(self, requester, room_id):
"""Get all the joined members in the room and their profile information.
If the user has left the room return the state events from when they left.
Args:
requester(Requester): The user requesting state events.
room_id(str): The room ID to get all state events from.
Returns:
A dict of user_id to profile info
"""
user_id = requester.user.to_string()
if not requester.app_service:
# We check AS auth after fetching the room membership, as it
# requires us to pull out all joined members anyway.
membership, _ = yield self._check_in_room_or_world_readable(
room_id, user_id
)
if membership != Membership.JOIN:
raise NotImplementedError(
"Getting joined members after leaving is not implemented"
)
users_with_profile = yield self.state.get_current_user_in_room(room_id)
# If this is an AS, double check that they are allowed to see the members.
# This can either be because the AS user is in the room or becuase there
# is a user in the room that the AS is "interested in"
if requester.app_service and user_id not in users_with_profile:
for uid in users_with_profile:
if requester.app_service.is_interested_in_user(uid):
break
else:
# Loop fell through, AS has no interested users in room
raise AuthError(403, "Appservice not in room")
defer.returnValue({
user_id: {
"avatar_url": profile.avatar_url,
"display_name": profile.display_name,
}
for user_id, profile in users_with_profile.iteritems()
})
