Merge pull request #5440 from matrix-org/babolivier/third_party_event_rules

Allow server admins to define implementations of extra rules for allowing or denying incoming events

1 files changed, 12 insertions, 2 deletions

diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 0b02469ceb..11650dc80c 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright 2014 - 2016 OpenMarket Ltd
-# Copyright 2017 - 2018 New Vector Ltd
+# Copyright 2014-2016 OpenMarket Ltd
+# Copyright 2017-2018 New Vector Ltd
+# Copyright 2019 The Matrix.org Foundation C.I.C.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -248,6 +249,7 @@ class EventCreationHandler(object):
         self.action_generator = hs.get_action_generator()
 
         self.spam_checker = hs.get_spam_checker()
+        self.third_party_event_rules = hs.get_third_party_event_rules()
 
         self._block_events_without_consent_error = (
             self.config.block_events_without_consent_error
@@ -658,6 +660,14 @@ class EventCreationHandler(object):
         else:
             room_version = yield self.store.get_room_version(event.room_id)
 
+        event_allowed = yield self.third_party_event_rules.check_event_allowed(
+            event, context,
+        )
+        if not event_allowed:
+            raise SynapseError(
+                403, "This event is not allowed in this context", Codes.FORBIDDEN,
+            )
+
         try:
             yield self.auth.check_from_context(room_version, event, context)
         except AuthError as err: