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Remove m.relates_to from events if the client set it to null

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It appears as though Python only checks to see if the key exists in a dictionary, not necessarily for a useful value. This means that when clients submit (valid) requests with `m.relates_to: null` and Synapse later reads it, it gets a None reference error on access.

This is the easier route than guarding all the places where it could be None.
This commit is contained in:
Travis Ralston 2019-05-22 19:14:10 -06:00
parent 1a94de60e8
commit f9d7d3aa89
1 changed files with 5 additions and 0 deletions
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5
synapse/rest/client/v1/room.py
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@ -201,6 +201,11 @@ class RoomSendEventRestServlet(ClientV1RestServlet):
requester = yield self.auth.get_user_by_req(request, allow_guest=True) requester = yield self.auth.get_user_by_req(request, allow_guest=True)
content = parse_json_object_from_request(request) content = parse_json_object_from_request(request)
# Pull out the relationship early if the client sent us something
# which cannot possibly be processed by us.
if content.get("m.relates_to", "not None") is None:
del content["m.relates_to"]
event_dict = { event_dict = {
"type": event_type, "type": event_type,
"content": content, "content": content,