diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py
index 79a2df6201..46826eb784 100644
--- a/synapse/handlers/directory.py
+++ b/synapse/handlers/directory.py
@@ -23,6 +23,7 @@ from synapse.api.errors import (
CodeMessageException,
Codes,
NotFoundError,
+ ShadowBanError,
StoreError,
SynapseError,
)
@@ -199,6 +200,8 @@ class DirectoryHandler(BaseHandler):
try:
await self._update_canonical_alias(requester, user_id, room_id, room_alias)
+ except ShadowBanError as e:
+ logger.info("Failed to update alias events due to shadow-ban: %s", e)
except AuthError as e:
logger.info("Failed to update alias events: %s", e)
@@ -292,6 +295,9 @@ class DirectoryHandler(BaseHandler):
"""
Send an updated canonical alias event if the removed alias was set as
the canonical alias or listed in the alt_aliases field.
+
+ Raises:
+ ShadowBanError if the requester has been shadow-banned.
"""
alias_event = await self.state.get_current_state(
room_id, EventTypes.CanonicalAlias, ""
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index c955a86be0..593c0cc6f1 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -15,6 +15,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
+import random
from typing import TYPE_CHECKING, Dict, List, Optional, Tuple
from canonicaljson import encode_canonical_json
@@ -34,6 +35,7 @@ from synapse.api.errors import (
Codes,
ConsentNotGivenError,
NotFoundError,
+ ShadowBanError,
SynapseError,
)
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
@@ -716,12 +718,20 @@ class EventCreationHandler(object):
event_dict: dict,
ratelimit: bool = True,
txn_id: Optional[str] = None,
+ ignore_shadow_ban: bool = False,
) -> Tuple[EventBase, int]:
"""
Creates an event, then sends it.
See self.create_event and self.send_nonmember_event.
+
+ Raises:
+ ShadowBanError if the requester has been shadow-banned.
"""
+ if not ignore_shadow_ban and requester.shadow_banned:
+ # We randomly sleep a bit just to annoy the requester.
+ await self.clock.sleep(random.randint(1, 10))
+ raise ShadowBanError()
# We limit the number of concurrent event sends in a room so that we
# don't fork the DAG too much. If we don't limit then we can end up in
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 0fc71475c3..e4788ef86b 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -136,6 +136,9 @@ class RoomCreationHandler(BaseHandler):
Returns:
the new room id
+
+ Raises:
+ ShadowBanError if the requester is shadow-banned.
"""
await self.ratelimit(requester)
@@ -171,6 +174,15 @@ class RoomCreationHandler(BaseHandler):
async def _upgrade_room(
self, requester: Requester, old_room_id: str, new_version: RoomVersion
):
+ """
+ Args:
+ requester: the user requesting the upgrade
+ old_room_id: the id of the room to be replaced
+ new_versions: the version to upgrade the room to
+
+ Raises:
+ ShadowBanError if the requester is shadow-banned.
+ """
user_id = requester.user.to_string()
# start by allocating a new room id
@@ -257,6 +269,9 @@ class RoomCreationHandler(BaseHandler):
old_room_id: the id of the room to be replaced
new_room_id: the id of the replacement room
old_room_state: the state map for the old room
+
+ Raises:
+ ShadowBanError if the requester is shadow-banned.
"""
old_room_pl_event_id = old_room_state.get((EventTypes.PowerLevels, ""))
@@ -829,11 +844,13 @@ class RoomCreationHandler(BaseHandler):
async def send(etype: str, content: JsonDict, **kwargs) -> int:
event = create(etype, content, **kwargs)
logger.debug("Sending %s in new room", etype)
+ # Allow these events to be sent even if the user is shadow-banned to
+ # allow the room creation to complete.
(
_,
last_stream_id,
) = await self.event_creation_handler.create_and_send_nonmember_event(
- creator, event, ratelimit=False
+ creator, event, ratelimit=False, ignore_shadow_ban=True,
)
return last_stream_id
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index a9dd3a6aec..11da8bc037 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -201,8 +201,8 @@ class RoomStateEventRestServlet(TransactionRestServlet):
if state_key is not None:
event_dict["state_key"] = state_key
- if event_type == EventTypes.Member:
- try:
+ try:
+ if event_type == EventTypes.Member:
membership = content.get("membership", None)
event_id, _ = await self.room_member_handler.update_membership(
requester,
@@ -211,16 +211,16 @@ class RoomStateEventRestServlet(TransactionRestServlet):
action=membership,
content=content,
)
- except ShadowBanError:
- event_id = "$" + random_string(43)
- else:
- (
- event,
- _,
- ) = await self.event_creation_handler.create_and_send_nonmember_event(
- requester, event_dict, txn_id=txn_id
- )
- event_id = event.event_id
+ else:
+ (
+ event,
+ _,
+ ) = await self.event_creation_handler.create_and_send_nonmember_event(
+ requester, event_dict, txn_id=txn_id
+ )
+ event_id = event.event_id
+ except ShadowBanError:
+ event_id = "$" + random_string(43)
set_tag("event_id", event_id)
ret = {"event_id": event_id}
@@ -253,12 +253,19 @@ class RoomSendEventRestServlet(TransactionRestServlet):
if b"ts" in request.args and requester.app_service:
event_dict["origin_server_ts"] = parse_integer(request, "ts", 0)
- event, _ = await self.event_creation_handler.create_and_send_nonmember_event(
- requester, event_dict, txn_id=txn_id
- )
+ try:
+ (
+ event,
+ _,
+ ) = await self.event_creation_handler.create_and_send_nonmember_event(
+ requester, event_dict, txn_id=txn_id
+ )
+ event_id = event.event_id
+ except ShadowBanError:
+ event_id = "$" + random_string(43)
- set_tag("event_id", event.event_id)
- return 200, {"event_id": event.event_id}
+ set_tag("event_id", event_id)
+ return 200, {"event_id": event_id}
def on_GET(self, request, room_id, event_type, txn_id):
return 200, "Not implemented"
@@ -799,20 +806,27 @@ class RoomRedactEventRestServlet(TransactionRestServlet):
requester = await self.auth.get_user_by_req(request)
content = parse_json_object_from_request(request)
- event, _ = await self.event_creation_handler.create_and_send_nonmember_event(
- requester,
- {
- "type": EventTypes.Redaction,
- "content": content,
- "room_id": room_id,
- "sender": requester.user.to_string(),
- "redacts": event_id,
- },
- txn_id=txn_id,
- )
+ try:
+ (
+ event,
+ _,
+ ) = await self.event_creation_handler.create_and_send_nonmember_event(
+ requester,
+ {
+ "type": EventTypes.Redaction,
+ "content": content,
+ "room_id": room_id,
+ "sender": requester.user.to_string(),
+ "redacts": event_id,
+ },
+ txn_id=txn_id,
+ )
+ event_id = event.event_id
+ except ShadowBanError:
+ event_id = "$" + random_string(43)
- set_tag("event_id", event.event_id)
- return 200, {"event_id": event.event_id}
+ set_tag("event_id", event_id)
+ return 200, {"event_id": event_id}
def on_PUT(self, request, room_id, event_id, txn_id):
set_tag("txn_id", txn_id)
diff --git a/synapse/rest/client/v2_alpha/relations.py b/synapse/rest/client/v2_alpha/relations.py
index 89002ffbff..e29f49f7f5 100644
--- a/synapse/rest/client/v2_alpha/relations.py
+++ b/synapse/rest/client/v2_alpha/relations.py
@@ -22,7 +22,7 @@ any time to reflect changes in the MSC.
import logging
from synapse.api.constants import EventTypes, RelationTypes
-from synapse.api.errors import SynapseError
+from synapse.api.errors import ShadowBanError, SynapseError
from synapse.http.servlet import (
RestServlet,
parse_integer,
@@ -35,6 +35,7 @@ from synapse.storage.relations import (
PaginationChunk,
RelationPaginationToken,
)
+from synapse.util.stringutils import random_string
from ._base import client_patterns
@@ -111,11 +112,18 @@ class RelationSendServlet(RestServlet):
"sender": requester.user.to_string(),
}
- event, _ = await self.event_creation_handler.create_and_send_nonmember_event(
- requester, event_dict=event_dict, txn_id=txn_id
- )
+ try:
+ (
+ event,
+ _,
+ ) = await self.event_creation_handler.create_and_send_nonmember_event(
+ requester, event_dict=event_dict, txn_id=txn_id
+ )
+ event_id = event.event_id
+ except ShadowBanError:
+ event_id = "$" + random_string(43)
- return 200, {"event_id": event.event_id}
+ return 200, {"event_id": event_id}
class RelationPaginationServlet(RestServlet):
diff --git a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
index f357015a70..39a5518614 100644
--- a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
+++ b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
@@ -15,13 +15,14 @@
import logging
-from synapse.api.errors import Codes, SynapseError
+from synapse.api.errors import Codes, ShadowBanError, SynapseError
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.http.servlet import (
RestServlet,
assert_params_in_dict,
parse_json_object_from_request,
)
+from synapse.util import stringutils
from ._base import client_patterns
@@ -62,7 +63,6 @@ class RoomUpgradeRestServlet(RestServlet):
content = parse_json_object_from_request(request)
assert_params_in_dict(content, ("new_version",))
- new_version = content["new_version"]
new_version = KNOWN_ROOM_VERSIONS.get(content["new_version"])
if new_version is None:
@@ -72,9 +72,13 @@ class RoomUpgradeRestServlet(RestServlet):
Codes.UNSUPPORTED_ROOM_VERSION,
)
- new_room_id = await self._room_creation_handler.upgrade_room(
- requester, room_id, new_version
- )
+ try:
+ new_room_id = await self._room_creation_handler.upgrade_room(
+ requester, room_id, new_version
+ )
+ except ShadowBanError:
+ # Generate a random room ID.
+ new_room_id = stringutils.random_string(18)
ret = {"replacement_room": new_room_id}
|
