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Merge pull request #3670 from matrix-org/neilj/mau_sync_block 

Block ability to read via sync if mau limit exceeded
This commit is contained in:
Neil Johnson 2018-08-14 15:21:31 +00:00 committed by GitHub
parent 614e6d517d 2545993ce4
commit 414d54b61a
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 112 additions and 20 deletions
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1
changelog.d/3670.feature Normal file
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@ -0,0 +1 @@
Where server is disabled, block ability for locked out users to read new messages

12
synapse/api/auth.py
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@ -775,15 +775,25 @@ class Auth(object):
)
@defer.inlineCallbacks
def check_auth_blocking(self):
def check_auth_blocking(self, user_id=None):
"""Checks if the user should be rejected for some external reason,
such as monthly active user limiting or global disable flag
Args:
user_id(str|None): If present, checks for presence against existing
MAU cohort
"""
if self.hs.config.hs_disabled:
raise AuthError(
403, self.hs.config.hs_disabled_message, errcode=Codes.HS_DISABLED
)
if self.hs.config.limit_usage_by_mau is True:
# If the user is already part of the MAU cohort
if user_id:
timestamp = yield self.store.user_last_seen_monthly_active(user_id)
if timestamp:
return
# Else if there is no room in the MAU bucket, bail
current_mau = yield self.store.get_monthly_active_count()
if current_mau >= self.hs.config.max_mau_value:
raise AuthError(

13
synapse/handlers/sync.py
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@ -191,6 +191,7 @@ class SyncHandler(object):
self.clock = hs.get_clock()
self.response_cache = ResponseCache(hs, "sync")
self.state = hs.get_state_handler()
self.auth = hs.get_auth()
# ExpiringCache((User, Device)) -> LruCache(state_key => event_id)
self.lazy_loaded_members_cache = ExpiringCache(
@ -198,19 +199,27 @@ class SyncHandler(object):
max_len=0, expiry_ms=LAZY_LOADED_MEMBERS_CACHE_MAX_AGE,
)
@defer.inlineCallbacks
def wait_for_sync_for_user(self, sync_config, since_token=None, timeout=0,
full_state=False):
"""Get the sync for a client if we have new data for it now. Otherwise
wait for new data to arrive on the server. If the timeout expires, then
return an empty sync result.
Returns:
A Deferred SyncResult.
Deferred[SyncResult]
"""
return self.response_cache.wrap(
# If the user is not part of the mau group, then check that limits have
# not been exceeded (if not part of the group by this point, almost certain
# auth_blocking will occur)
user_id = sync_config.user.to_string()
yield self.auth.check_auth_blocking(user_id)
res = yield self.response_cache.wrap(
sync_config.request_key,
self._wait_for_sync_for_user,
sync_config, since_token, timeout, full_state,
)
defer.returnValue(res)
@defer.inlineCallbacks
def _wait_for_sync_for_user(self, sync_config, since_token, timeout,

10
synapse/storage/monthly_active_users.py
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@ -125,7 +125,7 @@ class MonthlyActiveUsersStore(SQLBaseStore):
# is racy.
# Have resolved to invalidate the whole cache for now and do
# something about it if and when the perf becomes significant
self._user_last_seen_monthly_active.invalidate_all()
self.user_last_seen_monthly_active.invalidate_all()
self.get_monthly_active_count.invalidate_all()
@cached(num_args=0)
@ -164,11 +164,11 @@ class MonthlyActiveUsersStore(SQLBaseStore):
lock=False,
)
if is_insert:
self._user_last_seen_monthly_active.invalidate((user_id,))
self.user_last_seen_monthly_active.invalidate((user_id,))
self.get_monthly_active_count.invalidate(())
@cached(num_args=1)
def _user_last_seen_monthly_active(self, user_id):
def user_last_seen_monthly_active(self, user_id):
"""
Checks if a given user is part of the monthly active user group
Arguments:
@ -185,7 +185,7 @@ class MonthlyActiveUsersStore(SQLBaseStore):
},
retcol="timestamp",
allow_none=True,
desc="_user_last_seen_monthly_active",
desc="user_last_seen_monthly_active",
))
@defer.inlineCallbacks
@ -197,7 +197,7 @@ class MonthlyActiveUsersStore(SQLBaseStore):
user_id(str): the user_id to query
"""
if self.hs.config.limit_usage_by_mau:
last_seen_timestamp = yield self._user_last_seen_monthly_active(user_id)
last_seen_timestamp = yield self.user_last_seen_monthly_active(user_id)
now = self.hs.get_clock().time_msec()
# We want to reduce to the total number of db writes, and are happy

71
tests/handlers/test_sync.py Normal file
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@ -0,0 +1,71 @@
# -*- coding: utf-8 -*-
# Copyright 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
from synapse.api.errors import AuthError, Codes
from synapse.api.filtering import DEFAULT_FILTER_COLLECTION
from synapse.handlers.sync import SyncConfig, SyncHandler
from synapse.types import UserID
import tests.unittest
import tests.utils
from tests.utils import setup_test_homeserver
class SyncTestCase(tests.unittest.TestCase):
""" Tests Sync Handler. """
@defer.inlineCallbacks
def setUp(self):
self.hs = yield setup_test_homeserver()
self.sync_handler = SyncHandler(self.hs)
self.store = self.hs.get_datastore()
@defer.inlineCallbacks
def test_wait_for_sync_for_user_auth_blocking(self):
user_id1 = "@user1:server"
user_id2 = "@user2:server"
sync_config = self._generate_sync_config(user_id1)
self.hs.config.limit_usage_by_mau = True
self.hs.config.max_mau_value = 1
# Check that the happy case does not throw errors
yield self.store.upsert_monthly_active_user(user_id1)
yield self.sync_handler.wait_for_sync_for_user(sync_config)
# Test that global lock works
self.hs.config.hs_disabled = True
with self.assertRaises(AuthError) as e:
yield self.sync_handler.wait_for_sync_for_user(sync_config)
self.assertEquals(e.exception.errcode, Codes.HS_DISABLED)
self.hs.config.hs_disabled = False
sync_config = self._generate_sync_config(user_id2)
with self.assertRaises(AuthError) as e:
yield self.sync_handler.wait_for_sync_for_user(sync_config)
self.assertEquals(e.exception.errcode, Codes.MAU_LIMIT_EXCEEDED)
def _generate_sync_config(self, user_id):
return SyncConfig(
user=UserID(user_id.split(":")[0][1:], user_id.split(":")[1]),
filter_collection=DEFAULT_FILTER_COLLECTION,
is_guest=False,
request_key="request_key",
device_id="device_id",
)

12
tests/storage/test_client_ips.py
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@ -63,7 +63,7 @@ class ClientIpStoreTestCase(tests.unittest.TestCase):
yield self.store.insert_client_ip(
user_id, "access_token", "ip", "user_agent", "device_id"
)
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertFalse(active)
@defer.inlineCallbacks
@ -79,7 +79,7 @@ class ClientIpStoreTestCase(tests.unittest.TestCase):
yield self.store.insert_client_ip(
user_id, "access_token", "ip", "user_agent", "device_id"
)
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertFalse(active)
@defer.inlineCallbacks
@ -87,13 +87,13 @@ class ClientIpStoreTestCase(tests.unittest.TestCase):
self.hs.config.limit_usage_by_mau = True
self.hs.config.max_mau_value = 50
user_id = "@user:server"
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertFalse(active)
yield self.store.insert_client_ip(
user_id, "access_token", "ip", "user_agent", "device_id"
)
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertTrue(active)
@defer.inlineCallbacks
@ -102,7 +102,7 @@ class ClientIpStoreTestCase(tests.unittest.TestCase):
self.hs.config.max_mau_value = 50
user_id = "@user:server"
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertFalse(active)
yield self.store.insert_client_ip(
@ -111,5 +111,5 @@ class ClientIpStoreTestCase(tests.unittest.TestCase):
yield self.store.insert_client_ip(
user_id, "access_token", "ip", "user_agent", "device_id"
)
active = yield self.store._user_last_seen_monthly_active(user_id)
active = yield self.store.user_last_seen_monthly_active(user_id)
self.assertTrue(active)

13
tests/storage/test_monthly_active_users.py
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@ -60,9 +60,9 @@ class MonthlyActiveUsersTestCase(tests.unittest.TestCase):
# Test user is marked as active
timestamp = yield self.store._user_last_seen_monthly_active(user1)
timestamp = yield self.store.user_last_seen_monthly_active(user1)
self.assertTrue(timestamp)
timestamp = yield self.store._user_last_seen_monthly_active(user2)
timestamp = yield self.store.user_last_seen_monthly_active(user2)
self.assertTrue(timestamp)
# Test that users are never removed from the db.
@ -86,17 +86,18 @@ class MonthlyActiveUsersTestCase(tests.unittest.TestCase):
self.assertEqual(1, count)
@defer.inlineCallbacks
def test__user_last_seen_monthly_active(self):
def test_user_last_seen_monthly_active(self):
user_id1 = "@user1:server"
user_id2 = "@user2:server"
user_id3 = "@user3:server"
result = yield self.store._user_last_seen_monthly_active(user_id1)
result = yield self.store.user_last_seen_monthly_active(user_id1)
self.assertFalse(result == 0)
yield self.store.upsert_monthly_active_user(user_id1)
yield self.store.upsert_monthly_active_user(user_id2)
result = yield self.store._user_last_seen_monthly_active(user_id1)
result = yield self.store.user_last_seen_monthly_active(user_id1)
self.assertTrue(result > 0)
result = yield self.store._user_last_seen_monthly_active(user_id3)
result = yield self.store.user_last_seen_monthly_active(user_id3)
self.assertFalse(result == 0)
@defer.inlineCallbacks