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48206a8524
* Move message_limit into antispam. https://github.com/matrix-org/message_limit Not ideal but we've had complaints about keeping them separate and unfortunately the need for this module is not going to go away.
47 lines
1.9 KiB
Python
47 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019-2022 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from synapse.module_api import UserID
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logger = logging.getLogger("synapse.contrib." + __name__)
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class MessageMaxLength(object):
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"""
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Limits the number of characters that can be in the body of an event.
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"""
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def __init__(self, config, api):
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self.threshold: Option[int] = config.get("threshold", None)
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self.rooms: Set[str] = set(config.get("rooms", []))
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self.remote_servers: bool = config.get("remote_servers", False)
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self.api = api
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def check_event_for_spam(self, event: "synapse.events.EventBase") -> bool:
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if self.threshold is None:
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return False # not spam, MessageMaxLength hasn't been configured to do anything.
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sender = UserID.from_string(event.get("sender", ""))
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# check if the event is from us or we if we are limiting message length from remote servers too.
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if sender.domain == self.api.server_name or self.remote_servers:
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body = event.get("content", {}).get("body", "")
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if len(body) > self.threshold:
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room_id = event.get("room_id", "")
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if len(self.rooms) == 0 or room_id in self.rooms:
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return True # above the limit, spam
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return False # not spam (as far as we're concerned)
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