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Merge pull request #777 from matrix-org/markjh/move_filter_for_client 

move filter_events_for_client out of base handler
This commit is contained in:
Mark Haines 2016-05-13 11:30:22 +01:00
parent 260b498ee5 a458a40337
commit 048b3ece36
11 changed files with 252 additions and 215 deletions
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184
synapse/handlers/_base.py
View File

@ -19,7 +19,6 @@ from synapse.api.errors import LimitExceededError
from synapse.api.constants import Membership, EventTypes
from synapse.types import UserID, Requester
from synapse.util.logcontext import preserve_fn
import logging
@ -27,23 +26,6 @@ import logging
logger = logging.getLogger(__name__)
VISIBILITY_PRIORITY = (
"world_readable",
"shared",
"invited",
"joined",
)
MEMBERSHIP_PRIORITY = (
Membership.JOIN,
Membership.INVITE,
Membership.KNOCK,
Membership.LEAVE,
Membership.BAN,
)
class BaseHandler(object):
"""
Common base class for the event handlers.
@ -67,172 +49,6 @@ class BaseHandler(object):
self.event_builder_factory = hs.get_event_builder_factory()
@defer.inlineCallbacks
def filter_events_for_clients(self, user_tuples, events, event_id_to_state):
""" Returns dict of user_id -> list of events that user is allowed to
see.
Args:
user_tuples (str, bool): (user id, is_peeking) for each user to be
checked. is_peeking should be true if:
* the user is not currently a member of the room, and:
* the user has not been a member of the room since the
given events
events ([synapse.events.EventBase]): list of events to filter
"""
forgotten = yield defer.gatherResults([
preserve_fn(self.store.who_forgot_in_room)(
room_id,
)
for room_id in frozenset(e.room_id for e in events)
], consumeErrors=True)
# Set of membership event_ids that have been forgotten
event_id_forgotten = frozenset(
row["event_id"] for rows in forgotten for row in rows
)
ignore_dict_content = yield self.store.get_global_account_data_by_type_for_users(
"m.ignored_user_list", user_ids=[user_id for user_id, _ in user_tuples]
)
# FIXME: This will explode if people upload something incorrect.
ignore_dict = {
user_id: frozenset(
content.get("ignored_users", {}).keys() if content else []
)
for user_id, content in ignore_dict_content.items()
}
def allowed(event, user_id, is_peeking, ignore_list):
"""
Args:
event (synapse.events.EventBase): event to check
user_id (str)
is_peeking (bool)
ignore_list (list): list of users to ignore
"""
if not event.is_state() and event.sender in ignore_list:
return False
state = event_id_to_state[event.event_id]
# get the room_visibility at the time of the event.
visibility_event = state.get((EventTypes.RoomHistoryVisibility, ""), None)
if visibility_event:
visibility = visibility_event.content.get("history_visibility", "shared")
else:
visibility = "shared"
if visibility not in VISIBILITY_PRIORITY:
visibility = "shared"
# if it was world_readable, it's easy: everyone can read it
if visibility == "world_readable":
return True
# Always allow history visibility events on boundaries. This is done
# by setting the effective visibility to the least restrictive
# of the old vs new.
if event.type == EventTypes.RoomHistoryVisibility:
prev_content = event.unsigned.get("prev_content", {})
prev_visibility = prev_content.get("history_visibility", None)
if prev_visibility not in VISIBILITY_PRIORITY:
prev_visibility = "shared"
new_priority = VISIBILITY_PRIORITY.index(visibility)
old_priority = VISIBILITY_PRIORITY.index(prev_visibility)
if old_priority < new_priority:
visibility = prev_visibility
# likewise, if the event is the user's own membership event, use
# the 'most joined' membership
membership = None
if event.type == EventTypes.Member and event.state_key == user_id:
membership = event.content.get("membership", None)
if membership not in MEMBERSHIP_PRIORITY:
membership = "leave"
prev_content = event.unsigned.get("prev_content", {})
prev_membership = prev_content.get("membership", None)
if prev_membership not in MEMBERSHIP_PRIORITY:
prev_membership = "leave"
new_priority = MEMBERSHIP_PRIORITY.index(membership)
old_priority = MEMBERSHIP_PRIORITY.index(prev_membership)
if old_priority < new_priority:
membership = prev_membership
# otherwise, get the user's membership at the time of the event.
if membership is None:
membership_event = state.get((EventTypes.Member, user_id), None)
if membership_event:
if membership_event.event_id not in event_id_forgotten:
membership = membership_event.membership
# if the user was a member of the room at the time of the event,
# they can see it.
if membership == Membership.JOIN:
return True
if visibility == "joined":
# we weren't a member at the time of the event, so we can't
# see this event.
return False
elif visibility == "invited":
# user can also see the event if they were *invited* at the time
# of the event.
return membership == Membership.INVITE
else:
# visibility is shared: user can also see the event if they have
# become a member since the event
#
# XXX: if the user has subsequently joined and then left again,
# ideally we would share history up to the point they left. But
# we don't know when they left.
return not is_peeking
defer.returnValue({
user_id: [
event
for event in events
if allowed(event, user_id, is_peeking, ignore_dict.get(user_id, []))
]
for user_id, is_peeking in user_tuples
})
@defer.inlineCallbacks
def filter_events_for_client(self, user_id, events, is_peeking=False):
"""
Check which events a user is allowed to see
Args:
user_id(str): user id to be checked
events([synapse.events.EventBase]): list of events to be checked
is_peeking(bool): should be True if:
* the user is not currently a member of the room, and:
* the user has not been a member of the room since the given
events
Returns:
[synapse.events.EventBase]
"""
types = (
(EventTypes.RoomHistoryVisibility, ""),
(EventTypes.Member, user_id),
)
event_id_to_state = yield self.store.get_state_for_events(
frozenset(e.event_id for e in events),
types=types
)
res = yield self.filter_events_for_clients(
[(user_id, is_peeking)], events, event_id_to_state
)
defer.returnValue(res.get(user_id, []))
def ratelimit(self, requester):
time_now = self.clock.time()
allowed, time_allowed = self.ratelimiter.send_message(

2
synapse/handlers/federation.py
View File

@ -1113,7 +1113,7 @@ class FederationHandler(BaseHandler):
if not event.internal_metadata.is_outlier():
action_generator = ActionGenerator(self.hs)
yield action_generator.handle_push_actions_for_event(
event, context, self
event, context
)
event_stream_id, max_stream_id = yield self.store.persist_event(

18
synapse/handlers/message.py
View File

@ -29,6 +29,7 @@ from synapse.util import unwrapFirstError
from synapse.util.async import concurrently_execute
from synapse.util.caches.snapshot_cache import SnapshotCache
from synapse.util.logcontext import PreserveLoggingContext, preserve_fn
from synapse.visibility import filter_events_for_client
from ._base import BaseHandler
@ -128,7 +129,8 @@ class MessageHandler(BaseHandler):
"end": next_token.to_string(),
})
events = yield self.filter_events_for_client(
events = yield filter_events_for_client(
self.store,
user_id,
events,
is_peeking=(member_event_id is None),
@ -488,8 +490,8 @@ class MessageHandler(BaseHandler):
]
).addErrback(unwrapFirstError)
messages = yield self.filter_events_for_client(
user_id, messages
messages = yield filter_events_for_client(
self.store, user_id, messages
)
start_token = now_token.copy_and_replace("room_key", token[0])
@ -624,8 +626,8 @@ class MessageHandler(BaseHandler):
end_token=stream_token
)
messages = yield self.filter_events_for_client(
user_id, messages, is_peeking=is_peeking
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])
@ -705,8 +707,8 @@ class MessageHandler(BaseHandler):
consumeErrors=True,
).addErrback(unwrapFirstError)
messages = yield self.filter_events_for_client(
user_id, messages, is_peeking=is_peeking,
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])
@ -882,7 +884,7 @@ class MessageHandler(BaseHandler):
action_generator = ActionGenerator(self.hs)
yield action_generator.handle_push_actions_for_event(
event, context, self
event, context
)
(event_stream_id, max_stream_id) = yield self.store.persist_event(

7
synapse/handlers/room.py
View File

@ -26,6 +26,7 @@ from synapse.api.errors import AuthError, StoreError, SynapseError
from synapse.util import stringutils
from synapse.util.async import concurrently_execute
from synapse.util.caches.response_cache import ResponseCache
from synapse.visibility import filter_events_for_client
from collections import OrderedDict
@ -449,10 +450,12 @@ class RoomContextHandler(BaseHandler):
now_token = yield self.hs.get_event_sources().get_current_token()
def filter_evts(events):
return self.filter_events_for_client(
return filter_events_for_client(
self.store,
user.to_string(),
events,
is_peeking=is_guest)
is_peeking=is_guest
)
event = yield self.store.get_event(event_id, get_prev_content=True,
allow_none=True)

17
synapse/handlers/search.py
View File

@ -21,6 +21,7 @@ from synapse.api.constants import Membership, EventTypes
from synapse.api.filtering import Filter
from synapse.api.errors import SynapseError
from synapse.events.utils import serialize_event
from synapse.visibility import filter_events_for_client
from unpaddedbase64 import decode_base64, encode_base64
@ -172,8 +173,8 @@ class SearchHandler(BaseHandler):
filtered_events = search_filter.filter([r["event"] for r in results])
events = yield self.filter_events_for_client(
user.to_string(), filtered_events
events = yield filter_events_for_client(
self.store, user.to_string(), filtered_events
)
events.sort(key=lambda e: -rank_map[e.event_id])
@ -223,8 +224,8 @@ class SearchHandler(BaseHandler):
r["event"] for r in results
])
events = yield self.filter_events_for_client(
user.to_string(), filtered_events
events = yield filter_events_for_client(
self.store, user.to_string(), filtered_events
)
room_events.extend(events)
@ -281,12 +282,12 @@ class SearchHandler(BaseHandler):
event.room_id, event.event_id, before_limit, after_limit
)
res["events_before"] = yield self.filter_events_for_client(
user.to_string(), res["events_before"]
res["events_before"] = yield filter_events_for_client(
self.store, user.to_string(), res["events_before"]
)
res["events_after"] = yield self.filter_events_for_client(
user.to_string(), res["events_after"]
res["events_after"] = yield filter_events_for_client(
self.store, user.to_string(), res["events_after"]
)
res["start"] = now_token.copy_and_replace(

7
synapse/handlers/sync.py
View File

@ -22,6 +22,7 @@ from synapse.util.logcontext import LoggingContext
from synapse.util.metrics import Measure
from synapse.util.caches.response_cache import ResponseCache
from synapse.push.clientformat import format_push_rules_for_user
from synapse.visibility import filter_events_for_client
from twisted.internet import defer
@ -697,7 +698,8 @@ class SyncHandler(BaseHandler):
if recents is not None:
recents = sync_config.filter_collection.filter_room_timeline(recents)
recents = yield self.filter_events_for_client(
recents = yield filter_events_for_client(
self.store,
sync_config.user.to_string(),
recents,
)
@ -718,7 +720,8 @@ class SyncHandler(BaseHandler):
loaded_recents = sync_config.filter_collection.filter_room_timeline(
events
)
loaded_recents = yield self.filter_events_for_client(
loaded_recents = yield filter_events_for_client(
self.store,
sync_config.user.to_string(),
loaded_recents,
)

5
synapse/notifier.py
View File

@ -21,6 +21,7 @@ from synapse.util.logutils import log_function
from synapse.util.async import ObservableDeferred
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import StreamToken
from synapse.visibility import filter_events_for_client
import synapse.metrics
from collections import namedtuple
@ -398,8 +399,8 @@ class Notifier(object):
)
if name == "room":
room_member_handler = self.hs.get_handlers().room_member_handler
new_events = yield room_member_handler.filter_events_for_client(
new_events = yield filter_events_for_client(
self.store,
user.to_string(),
new_events,
is_peeking=is_peeking,

4
synapse/push/action_generator.py
View File

@ -37,14 +37,14 @@ class ActionGenerator:
# tag (ie. we just need all the users).
@defer.inlineCallbacks
def handle_push_actions_for_event(self, event, context, handler):
def handle_push_actions_for_event(self, event, context):
with Measure(self.clock, "handle_push_actions_for_event"):
bulk_evaluator = yield evaluator_for_event(
event, self.hs, self.store
)
actions_by_user = yield bulk_evaluator.action_for_event_by_user(
event, handler, context.current_state
event, context.current_state
)
context.push_actions = [

7
synapse/push/bulk_push_rule_evaluator.py
View File

@ -22,6 +22,7 @@ from .baserules import list_with_base_rules
from .push_rule_evaluator import PushRuleEvaluatorForEvent
from synapse.api.constants import EventTypes
from synapse.visibility import filter_events_for_clients
logger = logging.getLogger(__name__)
@ -126,7 +127,7 @@ class BulkPushRuleEvaluator:
self.store = store
@defer.inlineCallbacks
def action_for_event_by_user(self, event, handler, current_state):
def action_for_event_by_user(self, event, current_state):
actions_by_user = {}
# None of these users can be peeking since this list of users comes
@ -136,8 +137,8 @@ class BulkPushRuleEvaluator:
(u, False) for u in self.rules_by_user.keys()
]
filtered_by_user = yield handler.filter_events_for_clients(
user_tuples, [event], {event.event_id: current_state}
filtered_by_user = yield filter_events_for_clients(
self.store, user_tuples, [event], {event.event_id: current_state}
)
room_members = yield self.store.get_users_in_room(self.room_id)

6
synapse/push/mailer.py
View File

@ -28,6 +28,7 @@ from synapse.util.presentable_names import (
from synapse.types import UserID
from synapse.api.errors import StoreError
from synapse.api.constants import EventTypes
from synapse.visibility import filter_events_for_client
import jinja2
import bleach
@ -227,9 +228,8 @@ class Mailer(object):
"messages": [],
}
handler = self.hs.get_handlers().message_handler
the_events = yield handler.filter_events_for_client(
user_id, results["events_before"]
the_events = yield filter_events_for_client(
self.store, user_id, results["events_before"]
)
the_events.append(notif_event)

210
synapse/visibility.py Normal file
View File

@ -0,0 +1,210 @@
# -*- coding: utf-8 -*-
# Copyright 2014 - 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
from synapse.api.constants import Membership, EventTypes
from synapse.util.logcontext import preserve_fn
import logging
logger = logging.getLogger(__name__)
VISIBILITY_PRIORITY = (
"world_readable",
"shared",
"invited",
"joined",
)
MEMBERSHIP_PRIORITY = (
Membership.JOIN,
Membership.INVITE,
Membership.KNOCK,
Membership.LEAVE,
Membership.BAN,
)
@defer.inlineCallbacks
def filter_events_for_clients(store, user_tuples, events, event_id_to_state):
""" Returns dict of user_id -> list of events that user is allowed to
see.
Args:
user_tuples (str, bool): (user id, is_peeking) for each user to be
checked. is_peeking should be true if:
* the user is not currently a member of the room, and:
* the user has not been a member of the room since the
given events
events ([synapse.events.EventBase]): list of events to filter
"""
forgotten = yield defer.gatherResults([
preserve_fn(store.who_forgot_in_room)(
room_id,
)
for room_id in frozenset(e.room_id for e in events)
], consumeErrors=True)
# Set of membership event_ids that have been forgotten
event_id_forgotten = frozenset(
row["event_id"] for rows in forgotten for row in rows
)
ignore_dict_content = yield store.get_global_account_data_by_type_for_users(
"m.ignored_user_list", user_ids=[user_id for user_id, _ in user_tuples]
)
# FIXME: This will explode if people upload something incorrect.
ignore_dict = {
user_id: frozenset(
content.get("ignored_users", {}).keys() if content else []
)
for user_id, content in ignore_dict_content.items()
}
def allowed(event, user_id, is_peeking, ignore_list):
"""
Args:
event (synapse.events.EventBase): event to check
user_id (str)
is_peeking (bool)
ignore_list (list): list of users to ignore
"""
if not event.is_state() and event.sender in ignore_list:
return False
state = event_id_to_state[event.event_id]
# get the room_visibility at the time of the event.
visibility_event = state.get((EventTypes.RoomHistoryVisibility, ""), None)
if visibility_event:
visibility = visibility_event.content.get("history_visibility", "shared")
else:
visibility = "shared"
if visibility not in VISIBILITY_PRIORITY:
visibility = "shared"
# if it was world_readable, it's easy: everyone can read it
if visibility == "world_readable":
return True
# Always allow history visibility events on boundaries. This is done
# by setting the effective visibility to the least restrictive
# of the old vs new.
if event.type == EventTypes.RoomHistoryVisibility:
prev_content = event.unsigned.get("prev_content", {})
prev_visibility = prev_content.get("history_visibility", None)
if prev_visibility not in VISIBILITY_PRIORITY:
prev_visibility = "shared"
new_priority = VISIBILITY_PRIORITY.index(visibility)
old_priority = VISIBILITY_PRIORITY.index(prev_visibility)
if old_priority < new_priority:
visibility = prev_visibility
# likewise, if the event is the user's own membership event, use
# the 'most joined' membership
membership = None
if event.type == EventTypes.Member and event.state_key == user_id:
membership = event.content.get("membership", None)
if membership not in MEMBERSHIP_PRIORITY:
membership = "leave"
prev_content = event.unsigned.get("prev_content", {})
prev_membership = prev_content.get("membership", None)
if prev_membership not in MEMBERSHIP_PRIORITY:
prev_membership = "leave"
new_priority = MEMBERSHIP_PRIORITY.index(membership)
old_priority = MEMBERSHIP_PRIORITY.index(prev_membership)
if old_priority < new_priority:
membership = prev_membership
# otherwise, get the user's membership at the time of the event.
if membership is None:
membership_event = state.get((EventTypes.Member, user_id), None)
if membership_event:
if membership_event.event_id not in event_id_forgotten:
membership = membership_event.membership
# if the user was a member of the room at the time of the event,
# they can see it.
if membership == Membership.JOIN:
return True
if visibility == "joined":
# we weren't a member at the time of the event, so we can't
# see this event.
return False
elif visibility == "invited":
# user can also see the event if they were *invited* at the time
# of the event.
return membership == Membership.INVITE
else:
# visibility is shared: user can also see the event if they have
# become a member since the event
#
# XXX: if the user has subsequently joined and then left again,
# ideally we would share history up to the point they left. But
# we don't know when they left.
return not is_peeking
defer.returnValue({
user_id: [
event
for event in events
if allowed(event, user_id, is_peeking, ignore_dict.get(user_id, []))
]
for user_id, is_peeking in user_tuples
})
@defer.inlineCallbacks
def filter_events_for_client(store, user_id, events, is_peeking=False):
"""
Check which events a user is allowed to see
Args:
user_id(str): user id to be checked
events([synapse.events.EventBase]): list of events to be checked
is_peeking(bool): should be True if:
* the user is not currently a member of the room, and:
* the user has not been a member of the room since the given
events
Returns:
[synapse.events.EventBase]
"""
types = (
(EventTypes.RoomHistoryVisibility, ""),
(EventTypes.Member, user_id),
)
event_id_to_state = yield store.get_state_for_events(
frozenset(e.event_id for e in events),
types=types
)
res = yield filter_events_for_clients(
store, [(user_id, is_peeking)], events, event_id_to_state
)
defer.returnValue(res.get(user_id, []))