mirror of
https://git.anonymousland.org/anonymousland/synapse.git
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118 lines
4.3 KiB
Python
118 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2020 Tulir Asokan <tulir@maunium.net>
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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.api.errors import Codes, SynapseError, AuthError
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from synapse.http.servlet import RestServlet, parse_integer
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from synapse.logging.opentracing import set_tag
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from ._base import client_patterns
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logger = logging.getLogger(__name__)
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class RoomEventForwardServlet(RestServlet):
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"""
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PUT /net.maunium.msc2730/rooms/{room_id}/event/{event_id}/forward/{target_room_id}/{txn_id}
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"""
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PATTERNS = client_patterns(
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("/net.maunium.msc2730/rooms/(?P<room_id>[^/]*)/event/(?P<event_id>[^/]*)"
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"/forward/(?P<target_room_id>[^/]*)/(?P<txn_id>.*)"),
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releases=(), # This is an unstable feature
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)
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_data_key = "net.maunium.msc2730.forwarded"
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_err_not_forwardable = "NET.MAUNIUM.MSC2730_NOT_FORWARDABLE"
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def __init__(self, hs):
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super().__init__()
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self.event_creation_handler = hs.get_event_creation_handler()
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self.event_handler = hs.get_event_handler()
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self.store = hs.get_datastore()
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self.auth = hs.get_auth()
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async def on_PUT(self, request, room_id, event_id, target_room_id, txn_id):
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requester = await self.auth.get_user_by_req(request, allow_guest=True)
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try:
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event = await self.event_handler.get_event(
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requester.user, room_id, event_id
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)
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except AuthError:
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event = None
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if not event:
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raise SynapseError(404, "Event not found.", errcode=Codes.NOT_FOUND)
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if event.is_state():
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raise SynapseError(401, "State events cannot be forwarded.",
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errcode=self._err_not_forwardable)
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elif event.redacts:
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raise SynapseError(401, "Redaction events cannot be forwarded.",
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errcode=self._err_not_forwardable)
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elif event.internal_metadata.is_redacted():
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raise SynapseError(401, "Redacted events cannot be forwarded.",
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errcode=self._err_not_forwardable)
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event_id = event.event_id
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event_dict = event.get_dict()
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content = event_dict.pop("content")
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unsigned = event_dict.pop("unsigned", {})
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event_type = event_dict.pop("type")
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has_forward_meta = self._data_key in content
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try:
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is_valid_forward = has_forward_meta and unsigned[self._data_key]["valid"]
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except (KeyError, TypeError):
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is_valid_forward = False
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if has_forward_meta and not is_valid_forward:
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raise SynapseError(401, "Event contains invalid forward metadata.",
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errcode=self._err_not_forwardable)
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elif not has_forward_meta:
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content[self._data_key] = event_dict
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content[self._data_key]["unsigned"] = {
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"room_version": await self.store.get_room_version(event.room_id),
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# TODO add sender profile info here
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}
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forwarded_event_dict = {
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"type": event_type,
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"content": content,
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"room_id": target_room_id,
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"sender": requester.user.to_string(),
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"unsigned": {
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self._data_key: {
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"valid": True,
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"event_id": event_id,
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}
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}
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}
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if b"ts" in request.args and requester.app_service:
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forwarded_event_dict["origin_server_ts"] = parse_integer(request, "ts", 0)
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forwarded_event, _ = await self.event_creation_handler.create_and_send_nonmember_event(
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requester, forwarded_event_dict, txn_id=txn_id
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)
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set_tag("event_id", forwarded_event.event_id)
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return 200, {"event_id": forwarded_event.event_id}
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def register_servlets(hs, http_server):
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RoomEventForwardServlet(hs).register(http_server)
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