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Convert delete room admin API to async endpoint (#11223)

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Signed-off-by: Dirk Klimpel dirk@klimpel.org
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Dirk Klimpel 2021-11-12 13:35:31 +01:00 • committed by GitHub
parent c99da2d079
commit 8840a7b7f1
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9 changed files with 1320 additions and 94 deletions
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289
synapse/handlers/pagination.py
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@ -13,7 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from typing import TYPE_CHECKING, Any, Dict, Optional, Set
from typing import TYPE_CHECKING, Any, Collection, Dict, List, Optional, Set
import attr
@ -22,7 +22,7 @@ from twisted.python.failure import Failure
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import SynapseError
from synapse.api.filtering import Filter
from synapse.logging.context import run_in_background
from synapse.handlers.room import ShutdownRoomResponse
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.state import StateFilter
from synapse.streams.config import PaginationConfig
@ -56,11 +56,62 @@ class PurgeStatus:
STATUS_FAILED: "failed",
}
# Save the error message if an error occurs
error: str = ""
# Tracks whether this request has completed. One of STATUS_{ACTIVE,COMPLETE,FAILED}.
status: int = STATUS_ACTIVE
def asdict(self) -> JsonDict:
return {"status": PurgeStatus.STATUS_TEXT[self.status]}
ret = {"status": PurgeStatus.STATUS_TEXT[self.status]}
if self.error:
ret["error"] = self.error
return ret
@attr.s(slots=True, auto_attribs=True)
class DeleteStatus:
"""Object tracking the status of a delete room request
This class contains information on the progress of a delete room request, for
return by get_delete_status.
"""
STATUS_PURGING = 0
STATUS_COMPLETE = 1
STATUS_FAILED = 2
STATUS_SHUTTING_DOWN = 3
STATUS_TEXT = {
STATUS_PURGING: "purging",
STATUS_COMPLETE: "complete",
STATUS_FAILED: "failed",
STATUS_SHUTTING_DOWN: "shutting_down",
}
# Tracks whether this request has completed.
# One of STATUS_{PURGING,COMPLETE,FAILED,SHUTTING_DOWN}.
status: int = STATUS_PURGING
# Save the error message if an error occurs
error: str = ""
# Saves the result of an action to give it back to REST API
shutdown_room: ShutdownRoomResponse = {
"kicked_users": [],
"failed_to_kick_users": [],
"local_aliases": [],
"new_room_id": None,
}
def asdict(self) -> JsonDict:
ret = {
"status": DeleteStatus.STATUS_TEXT[self.status],
"shutdown_room": self.shutdown_room,
}
if self.error:
ret["error"] = self.error
return ret
class PaginationHandler:
@ -70,6 +121,9 @@ class PaginationHandler:
paginating during a purge.
"""
# when to remove a completed deletion/purge from the results map
CLEAR_PURGE_AFTER_MS = 1000 * 3600 * 24 # 24 hours
def __init__(self, hs: "HomeServer"):
self.hs = hs
self.auth = hs.get_auth()
@ -78,11 +132,18 @@ class PaginationHandler:
self.state_store = self.storage.state
self.clock = hs.get_clock()
self._server_name = hs.hostname
self._room_shutdown_handler = hs.get_room_shutdown_handler()
self.pagination_lock = ReadWriteLock()
# IDs of rooms in which there currently an active purge *or delete* operation.
self._purges_in_progress_by_room: Set[str] = set()
# map from purge id to PurgeStatus
self._purges_by_id: Dict[str, PurgeStatus] = {}
# map from purge id to DeleteStatus
self._delete_by_id: Dict[str, DeleteStatus] = {}
# map from room id to delete ids
# Dict[`room_id`, List[`delete_id`]]
self._delete_by_room: Dict[str, List[str]] = {}
self._event_serializer = hs.get_event_client_serializer()
self._retention_default_max_lifetime = (
@ -265,8 +326,13 @@ class PaginationHandler:
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
run_as_background_process(
"purge_history",
self._purge_history,
purge_id,
room_id,
token,
delete_local_events,
)
return purge_id
@ -276,7 +342,7 @@ class PaginationHandler:
"""Carry out a history purge on a room.
Args:
purge_id: The id for this purge
purge_id: The ID for this purge.
room_id: The room to purge from
token: topological token to delete events before
delete_local_events: True to delete local events as well as remote ones
@ -295,6 +361,7 @@ class PaginationHandler:
"[purge] failed", exc_info=(f.type, f.value, f.getTracebackObject()) # type: ignore
)
self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED
self._purges_by_id[purge_id].error = f.getErrorMessage()
finally:
self._purges_in_progress_by_room.discard(room_id)
@ -302,7 +369,9 @@ class PaginationHandler:
def clear_purge() -> None:
del self._purges_by_id[purge_id]
self.hs.get_reactor().callLater(24 * 3600, clear_purge)
self.hs.get_reactor().callLater(
PaginationHandler.CLEAR_PURGE_AFTER_MS / 1000, clear_purge
)
def get_purge_status(self, purge_id: str) -> Optional[PurgeStatus]:
"""Get the current status of an active purge
@ -312,8 +381,25 @@ class PaginationHandler:
"""
return self._purges_by_id.get(purge_id)
def get_delete_status(self, delete_id: str) -> Optional[DeleteStatus]:
"""Get the current status of an active deleting
Args:
delete_id: delete_id returned by start_shutdown_and_purge_room
"""
return self._delete_by_id.get(delete_id)
def get_delete_ids_by_room(self, room_id: str) -> Optional[Collection[str]]:
"""Get all active delete ids by room
Args:
room_id: room_id that is deleted
"""
return self._delete_by_room.get(room_id)
async def purge_room(self, room_id: str, force: bool = False) -> None:
"""Purge the given room from the database.
This function is part the delete room v1 API.
Args:
room_id: room to be purged
@ -472,3 +558,192 @@ class PaginationHandler:
)
return chunk
async def _shutdown_and_purge_room(
self,
delete_id: str,
room_id: str,
requester_user_id: str,
new_room_user_id: Optional[str] = None,
new_room_name: Optional[str] = None,
message: Optional[str] = None,
block: bool = False,
purge: bool = True,
force_purge: bool = False,
) -> None:
"""
Shuts down and purges a room.
See `RoomShutdownHandler.shutdown_room` for details of creation of the new room
Args:
delete_id: The ID for this delete.
room_id: The ID of the room to shut down.
requester_user_id:
User who requested the action. Will be recorded as putting the room on the
blocking list.
new_room_user_id:
If set, a new room will be created with this user ID
as the creator and admin, and all users in the old room will be
moved into that room. If not set, no new room will be created
and the users will just be removed from the old room.
new_room_name:
A string representing the name of the room that new users will
be invited to. Defaults to `Content Violation Notification`
message:
A string containing the first message that will be sent as
`new_room_user_id` in the new room. Ideally this will clearly
convey why the original room was shut down.
Defaults to `Sharing illegal content on this server is not
permitted and rooms in violation will be blocked.`
block:
If set to `true`, this room will be added to a blocking list,
preventing future attempts to join the room. Defaults to `false`.
purge:
If set to `true`, purge the given room from the database.
force_purge:
If set to `true`, the room will be purged from database
also if it fails to remove some users from room.
Saves a `RoomShutdownHandler.ShutdownRoomResponse` in `DeleteStatus`:
"""
self._purges_in_progress_by_room.add(room_id)
try:
with await self.pagination_lock.write(room_id):
self._delete_by_id[delete_id].status = DeleteStatus.STATUS_SHUTTING_DOWN
self._delete_by_id[
delete_id
].shutdown_room = await self._room_shutdown_handler.shutdown_room(
room_id=room_id,
requester_user_id=requester_user_id,
new_room_user_id=new_room_user_id,
new_room_name=new_room_name,
message=message,
block=block,
)
self._delete_by_id[delete_id].status = DeleteStatus.STATUS_PURGING
if purge:
logger.info("starting purge room_id %s", room_id)
# first check that we have no users in this room
if not force_purge:
joined = await self.store.is_host_joined(
room_id, self._server_name
)
if joined:
raise SynapseError(
400, "Users are still joined to this room"
)
await self.storage.purge_events.purge_room(room_id)
logger.info("complete")
self._delete_by_id[delete_id].status = DeleteStatus.STATUS_COMPLETE
except Exception:
f = Failure()
logger.error(
"failed",
exc_info=(f.type, f.value, f.getTracebackObject()), # type: ignore
)
self._delete_by_id[delete_id].status = DeleteStatus.STATUS_FAILED
self._delete_by_id[delete_id].error = f.getErrorMessage()
finally:
self._purges_in_progress_by_room.discard(room_id)
# remove the delete from the list 24 hours after it completes
def clear_delete() -> None:
del self._delete_by_id[delete_id]
self._delete_by_room[room_id].remove(delete_id)
if not self._delete_by_room[room_id]:
del self._delete_by_room[room_id]
self.hs.get_reactor().callLater(
PaginationHandler.CLEAR_PURGE_AFTER_MS / 1000, clear_delete
)
def start_shutdown_and_purge_room(
self,
room_id: str,
requester_user_id: str,
new_room_user_id: Optional[str] = None,
new_room_name: Optional[str] = None,
message: Optional[str] = None,
block: bool = False,
purge: bool = True,
force_purge: bool = False,
) -> str:
"""Start off shut down and purge on a room.
Args:
room_id: The ID of the room to shut down.
requester_user_id:
User who requested the action and put the room on the
blocking list.
new_room_user_id:
If set, a new room will be created with this user ID
as the creator and admin, and all users in the old room will be
moved into that room. If not set, no new room will be created
and the users will just be removed from the old room.
new_room_name:
A string representing the name of the room that new users will
be invited to. Defaults to `Content Violation Notification`
message:
A string containing the first message that will be sent as
`new_room_user_id` in the new room. Ideally this will clearly
convey why the original room was shut down.
Defaults to `Sharing illegal content on this server is not
permitted and rooms in violation will be blocked.`
block:
If set to `true`, this room will be added to a blocking list,
preventing future attempts to join the room. Defaults to `false`.
purge:
If set to `true`, purge the given room from the database.
force_purge:
If set to `true`, the room will be purged from database
also if it fails to remove some users from room.
Returns:
unique ID for this delete transaction.
"""
if room_id in self._purges_in_progress_by_room:
raise SynapseError(
400, "History purge already in progress for %s" % (room_id,)
)
# This check is double to `RoomShutdownHandler.shutdown_room`
# But here the requester get a direct response / error with HTTP request
# and do not have to check the purge status
if new_room_user_id is not None:
if not self.hs.is_mine_id(new_room_user_id):
raise SynapseError(
400, "User must be our own: %s" % (new_room_user_id,)
)
delete_id = random_string(16)
# we log the delete_id here so that it can be tied back to the
# request id in the log lines.
logger.info(
"starting shutdown room_id %s with delete_id %s",
room_id,
delete_id,
)
self._delete_by_id[delete_id] = DeleteStatus()
self._delete_by_room.setdefault(room_id, []).append(delete_id)
run_as_background_process(
"shutdown_and_purge_room",
self._shutdown_and_purge_room,
delete_id,
room_id,
requester_user_id,
new_room_user_id,
new_room_name,
message,
block,
purge,
force_purge,
)
return delete_id