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Merge pull request #4091 from matrix-org/rav/room_version_upgrades

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Room version upgrade support
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Richard van der Hoff 2018-10-29 12:47:20 +00:00 committed by GitHub
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9 changed files with 325 additions and 47 deletions
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1
changelog.d/4091.feature Normal file
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@ -0,0 +1 @@
Support for replacing rooms with new ones

1
synapse/api/constants.py
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@ -61,6 +61,7 @@ class LoginType(object):
class EventTypes(object):
Member = "m.room.member"
Create = "m.room.create"
Tombstone = "m.room.tombstone"
JoinRules = "m.room.join_rules"
PowerLevels = "m.room.power_levels"
Aliases = "m.room.aliases"

6
synapse/handlers/register.py
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@ -50,7 +50,6 @@ class RegistrationHandler(BaseHandler):
self._auth_handler = hs.get_auth_handler()
self.profile_handler = hs.get_profile_handler()
self.user_directory_handler = hs.get_user_directory_handler()
self.room_creation_handler = self.hs.get_room_creation_handler()
self.captcha_client = CaptchaServerHttpClient(hs)
self._next_generated_user_id = None
@ -241,7 +240,10 @@ class RegistrationHandler(BaseHandler):
else:
# create room expects the localpart of the room alias
room_alias_localpart = room_alias.localpart
yield self.room_creation_handler.create_room(
# getting the RoomCreationHandler during init gives a dependency
# loop
yield self.hs.get_room_creation_handler().create_room(
fake_requester,
config={
"preset": "public_chat",

253
synapse/handlers/room.py
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@ -21,7 +21,7 @@ import math
import string
from collections import OrderedDict
from six import string_types
from six import iteritems, string_types
from twisted.internet import defer
@ -32,10 +32,11 @@ from synapse.api.constants import (
JoinRules,
RoomCreationPreset,
)
from synapse.api.errors import AuthError, Codes, StoreError, SynapseError
from synapse.api.errors import AuthError, Codes, NotFoundError, StoreError, SynapseError
from synapse.storage.state import StateFilter
from synapse.types import RoomAlias, RoomID, RoomStreamToken, StreamToken, UserID
from synapse.util import stringutils
from synapse.util.async_helpers import Linearizer
from synapse.visibility import filter_events_for_client
from ._base import BaseHandler
@ -73,6 +74,190 @@ class RoomCreationHandler(BaseHandler):
self.spam_checker = hs.get_spam_checker()
self.event_creation_handler = hs.get_event_creation_handler()
self.room_member_handler = hs.get_room_member_handler()
# linearizer to stop two upgrades happening at once
self._upgrade_linearizer = Linearizer("room_upgrade_linearizer")
@defer.inlineCallbacks
def upgrade_room(self, requester, old_room_id, new_version):
"""Replace a room with a new room with a different version
Args:
requester (synapse.types.Requester): the user requesting the upgrade
old_room_id (unicode): the id of the room to be replaced
new_version (unicode): the new room version to use
Returns:
Deferred[unicode]: the new room id
"""
yield self.ratelimit(requester)
user_id = requester.user.to_string()
with (yield self._upgrade_linearizer.queue(old_room_id)):
# start by allocating a new room id
r = yield self.store.get_room(old_room_id)
if r is None:
raise NotFoundError("Unknown room id %s" % (old_room_id,))
new_room_id = yield self._generate_room_id(
creator_id=user_id, is_public=r["is_public"],
)
# we create and auth the tombstone event before properly creating the new
# room, to check our user has perms in the old room.
tombstone_event, tombstone_context = (
yield self.event_creation_handler.create_event(
requester, {
"type": EventTypes.Tombstone,
"state_key": "",
"room_id": old_room_id,
"sender": user_id,
"content": {
"body": "This room has been replaced",
"replacement_room": new_room_id,
}
},
token_id=requester.access_token_id,
)
)
yield self.auth.check_from_context(tombstone_event, tombstone_context)
yield self.clone_exiting_room(
requester,
old_room_id=old_room_id,
new_room_id=new_room_id,
new_room_version=new_version,
tombstone_event_id=tombstone_event.event_id,
)
# now send the tombstone
yield self.event_creation_handler.send_nonmember_event(
requester, tombstone_event, tombstone_context,
)
old_room_state = yield tombstone_context.get_current_state_ids(self.store)
old_room_pl_event_id = old_room_state.get((EventTypes.PowerLevels, ""))
if old_room_pl_event_id is None:
logger.warning(
"Not supported: upgrading a room with no PL event. Not setting PLs "
"in old room.",
)
else:
# we try to stop regular users from speaking by setting the PL required
# to send regular events and invites to 'Moderator' level. That's normally
# 50, but if the default PL in a room is 50 or more, then we set the
# required PL above that.
old_room_pl_state = yield self.store.get_event(old_room_pl_event_id)
pl_content = dict(old_room_pl_state.content)
users_default = int(pl_content.get("users_default", 0))
restricted_level = max(users_default + 1, 50)
updated = False
for v in ("invite", "events_default"):
current = int(pl_content.get(v, 0))
if current < restricted_level:
logger.debug(
"Setting level for %s in %s to %i (was %i)",
v, old_room_id, restricted_level, current,
)
pl_content[v] = restricted_level
updated = True
else:
logger.debug(
"Not setting level for %s (already %i)",
v, current,
)
if updated:
yield self.event_creation_handler.create_and_send_nonmember_event(
requester, {
"type": EventTypes.PowerLevels,
"state_key": '',
"room_id": old_room_id,
"sender": user_id,
"content": pl_content,
}, ratelimit=False,
)
defer.returnValue(new_room_id)
@defer.inlineCallbacks
def clone_exiting_room(
self, requester, old_room_id, new_room_id, new_room_version,
tombstone_event_id,
):
"""Populate a new room based on an old room
Args:
requester (synapse.types.Requester): the user requesting the upgrade
old_room_id (unicode): the id of the room to be replaced
new_room_id (unicode): the id to give the new room (should already have been
created with _gemerate_room_id())
new_room_version (unicode): the new room version to use
tombstone_event_id (unicode|str): the ID of the tombstone event in the old
room.
Returns:
Deferred[None]
"""
user_id = requester.user.to_string()
if not self.spam_checker.user_may_create_room(user_id):
raise SynapseError(403, "You are not permitted to create rooms")
# XXX check alias is free
# canonical_alias = None
# XXX create association in directory handler
creation_content = {
"room_version": new_room_version,
"predecessor": {
"room_id": old_room_id,
"event_id": tombstone_event_id,
}
}
initial_state = dict()
types_to_copy = (
(EventTypes.PowerLevels, ""),
(EventTypes.JoinRules, ""),
(EventTypes.Name, ""),
(EventTypes.Topic, ""),
(EventTypes.RoomHistoryVisibility, ""),
(EventTypes.GuestAccess, "")
)
old_room_state_ids = yield self.store.get_filtered_current_state_ids(
old_room_id, StateFilter.from_types(types_to_copy),
)
# map from event_id to BaseEvent
old_room_state_events = yield self.store.get_events(old_room_state_ids.values())
for k, old_event_id in iteritems(old_room_state_ids):
old_event = old_room_state_events.get(old_event_id)
if old_event:
initial_state[k] = old_event.content
yield self._send_events_for_new_room(
requester,
new_room_id,
# we expect to override all the presets with initial_state, so this is
# somewhat arbitrary.
preset_config=RoomCreationPreset.PRIVATE_CHAT,
invite_list=[],
initial_state=initial_state,
creation_content=creation_content,
)
# XXX invites/joins
# XXX 3pid invites
# XXX directory_handler.send_room_alias_update_event
@defer.inlineCallbacks
def create_room(self, requester, config, ratelimit=True,
@ -165,28 +350,7 @@ class RoomCreationHandler(BaseHandler):
visibility = config.get("visibility", None)
is_public = visibility == "public"
# autogen room IDs and try to create it. We may clash, so just
# try a few times till one goes through, giving up eventually.
attempts = 0
room_id = None
while attempts < 5:
try:
random_string = stringutils.random_string(18)
gen_room_id = RoomID(
random_string,
self.hs.hostname,
)
yield self.store.store_room(
room_id=gen_room_id.to_string(),
room_creator_user_id=user_id,
is_public=is_public
)
room_id = gen_room_id.to_string()
break
except StoreError:
attempts += 1
if not room_id:
raise StoreError(500, "Couldn't generate a room ID.")
room_id = yield self._generate_room_id(creator_id=user_id, is_public=is_public)
if room_alias:
directory_handler = self.hs.get_handlers().directory_handler
@ -216,18 +380,15 @@ class RoomCreationHandler(BaseHandler):
# override any attempt to set room versions via the creation_content
creation_content["room_version"] = room_version
room_member_handler = self.hs.get_room_member_handler()
yield self._send_events_for_new_room(
requester,
room_id,
room_member_handler,
preset_config=preset_config,
invite_list=invite_list,
initial_state=initial_state,
creation_content=creation_content,
room_alias=room_alias,
power_level_content_override=config.get("power_level_content_override", {}),
power_level_content_override=config.get("power_level_content_override"),
creator_join_profile=creator_join_profile,
)
@ -263,7 +424,7 @@ class RoomCreationHandler(BaseHandler):
if is_direct:
content["is_direct"] = is_direct
yield room_member_handler.update_membership(
yield self.room_member_handler.update_membership(
requester,
UserID.from_string(invitee),
room_id,
@ -301,14 +462,13 @@ class RoomCreationHandler(BaseHandler):
self,
creator, # A Requester object.
room_id,
room_member_handler,
preset_config,
invite_list,
initial_state,
creation_content,
room_alias,
power_level_content_override,
creator_join_profile,
room_alias=None,
power_level_content_override=None,
creator_join_profile=None,
):
def create(etype, content, **kwargs):
e = {
@ -346,7 +506,7 @@ class RoomCreationHandler(BaseHandler):
content=creation_content,
)
yield room_member_handler.update_membership(
yield self.room_member_handler.update_membership(
creator,
creator.user,
room_id,
@ -388,6 +548,7 @@ class RoomCreationHandler(BaseHandler):
for invitee in invite_list:
power_level_content["users"][invitee] = 100
if power_level_content_override:
power_level_content.update(power_level_content_override)
yield send(
@ -427,6 +588,30 @@ class RoomCreationHandler(BaseHandler):
content=content,
)
@defer.inlineCallbacks
def _generate_room_id(self, creator_id, is_public):
# autogen room IDs and try to create it. We may clash, so just
# try a few times till one goes through, giving up eventually.
attempts = 0
while attempts < 5:
try:
random_string = stringutils.random_string(18)
gen_room_id = RoomID(
random_string,
self.hs.hostname,
).to_string()
if isinstance(gen_room_id, bytes):
gen_room_id = gen_room_id.decode('utf-8')
yield self.store.store_room(
room_id=gen_room_id,
room_creator_user_id=creator_id,
is_public=is_public,
)
defer.returnValue(gen_room_id)
except StoreError:
attempts += 1
raise StoreError(500, "Couldn't generate a room ID.")
class RoomContextHandler(object):
def __init__(self, hs):

2
synapse/rest/__init__.py
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@ -47,6 +47,7 @@ from synapse.rest.client.v2_alpha import (
register,
report_event,
room_keys,
room_upgrade_rest_servlet,
sendtodevice,
sync,
tags,
@ -116,3 +117,4 @@ class ClientRestResource(JsonResource):
sendtodevice.register_servlets(hs, client_resource)
user_directory.register_servlets(hs, client_resource)
groups.register_servlets(hs, client_resource)
room_upgrade_rest_servlet.register_servlets(hs, client_resource)

89
synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py Normal file
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@ -0,0 +1,89 @@
# -*- coding: utf-8 -*-
# Copyright 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.
import logging
from twisted.internet import defer
from synapse.api.constants import KNOWN_ROOM_VERSIONS
from synapse.api.errors import Codes, SynapseError
from synapse.http.servlet import (
RestServlet,
assert_params_in_dict,
parse_json_object_from_request,
)
from ._base import client_v2_patterns
logger = logging.getLogger(__name__)
class RoomUpgradeRestServlet(RestServlet):
"""Handler for room uprade requests.
Handles requests of the form:
POST /_matrix/client/r0/rooms/$roomid/upgrade HTTP/1.1
Content-Type: application/json
{
"new_version": "2",
}
Creates a new room and shuts down the old one. Returns the ID of the new room.
Args:
hs (synapse.server.HomeServer):
"""
PATTERNS = client_v2_patterns(
# /rooms/$roomid/upgrade
"/rooms/(?P<room_id>[^/]*)/upgrade$",
v2_alpha=False,
)
def __init__(self, hs):
super(RoomUpgradeRestServlet, self).__init__()
self._hs = hs
self._room_creation_handler = hs.get_room_creation_handler()
self._auth = hs.get_auth()
@defer.inlineCallbacks
def on_POST(self, request, room_id):
requester = yield self._auth.get_user_by_req(request)
content = parse_json_object_from_request(request)
assert_params_in_dict(content, ("new_version", ))
new_version = content["new_version"]
if new_version not in KNOWN_ROOM_VERSIONS:
raise SynapseError(
400,
"Your homeserver does not support this room version",
Codes.UNSUPPORTED_ROOM_VERSION,
)
new_room_id = yield self._room_creation_handler.upgrade_room(
requester, room_id, new_version
)
ret = {
"replacement_room": new_room_id,
}
defer.returnValue((200, ret))
def register_servlets(hs, http_server):
RoomUpgradeRestServlet(hs).register(http_server)

6
synapse/server.pyi
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@ -7,6 +7,9 @@ import synapse.handlers.auth
import synapse.handlers.deactivate_account
import synapse.handlers.device
import synapse.handlers.e2e_keys
import synapse.handlers.room
import synapse.handlers.room_member
import synapse.handlers.message
import synapse.handlers.set_password
import synapse.rest.media.v1.media_repository
import synapse.server_notices.server_notices_manager
@ -50,6 +53,9 @@ class HomeServer(object):
def get_room_creation_handler(self) -> synapse.handlers.room.RoomCreationHandler:
pass
def get_room_member_handler(self) -> synapse.handlers.room_member.RoomMemberHandler:
pass
def get_event_creation_handler(self) -> synapse.handlers.message.EventCreationHandler:
pass

2
synapse/storage/room.py
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@ -47,7 +47,7 @@ class RoomWorkerStore(SQLBaseStore):
Args:
room_id (str): The ID of the room to retrieve.
Returns:
A namedtuple containing the room information, or an empty list.
A dict containing the room information, or None if the room is unknown.
"""
return self._simple_select_one(
table="rooms",

10
tests/server_notices/test_resource_limits_server_notices.py
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@ -4,7 +4,6 @@ from twisted.internet import defer
from synapse.api.constants import EventTypes, ServerNoticeMsgType
from synapse.api.errors import ResourceLimitError
from synapse.handlers.auth import AuthHandler
from synapse.server_notices.resource_limits_server_notices import (
ResourceLimitsServerNotices,
)
@ -13,17 +12,10 @@ from tests import unittest
from tests.utils import setup_test_homeserver
class AuthHandlers(object):
def __init__(self, hs):
self.auth_handler = AuthHandler(hs)
class TestResourceLimitsServerNotices(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
self.hs = yield setup_test_homeserver(self.addCleanup, handlers=None)
self.hs.handlers = AuthHandlers(self.hs)
self.auth_handler = self.hs.handlers.auth_handler
self.hs = yield setup_test_homeserver(self.addCleanup)
self.server_notices_sender = self.hs.get_server_notices_sender()
# relying on [1] is far from ideal, but the only case where