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-rw-r--r--synapse/api/ratelimiting.py8
-rw-r--r--synapse/appservice/api.py12
-rw-r--r--synapse/handlers/room.py16
3 files changed, 25 insertions, 11 deletions
diff --git a/synapse/api/ratelimiting.py b/synapse/api/ratelimiting.py
index 044c7d4926..511790c7c5 100644
--- a/synapse/api/ratelimiting.py
+++ b/synapse/api/ratelimiting.py
@@ -343,6 +343,7 @@ class RequestRatelimiter:
         requester: Requester,
         update: bool = True,
         is_admin_redaction: bool = False,
+        n_actions: int = 1,
     ) -> None:
         """Ratelimits requests.
 
@@ -355,6 +356,8 @@ class RequestRatelimiter:
             is_admin_redaction: Whether this is a room admin/moderator
                 redacting an event. If so then we may apply different
                 ratelimits depending on config.
+            n_actions: Multiplier for the number of actions to apply to the
+                rate limiter at once.
 
         Raises:
             LimitExceededError if the request should be ratelimited
@@ -383,7 +386,9 @@ class RequestRatelimiter:
         if is_admin_redaction and self.admin_redaction_ratelimiter:
             # If we have separate config for admin redactions, use a separate
             # ratelimiter as to not have user_ids clash
-            await self.admin_redaction_ratelimiter.ratelimit(requester, update=update)
+            await self.admin_redaction_ratelimiter.ratelimit(
+                requester, update=update, n_actions=n_actions
+            )
         else:
             # Override rate and burst count per-user
             await self.request_ratelimiter.ratelimit(
@@ -391,4 +396,5 @@ class RequestRatelimiter:
                 rate_hz=messages_per_second,
                 burst_count=burst_count,
                 update=update,
+                n_actions=n_actions,
             )
diff --git a/synapse/appservice/api.py b/synapse/appservice/api.py
index fbac4375b0..60774b240d 100644
--- a/synapse/appservice/api.py
+++ b/synapse/appservice/api.py
@@ -123,7 +123,7 @@ class ApplicationServiceApi(SimpleHttpClient):
             response = await self.get_json(
                 uri,
                 {"access_token": service.hs_token},
-                headers={"Authorization": f"Bearer {service.hs_token}"},
+                headers={"Authorization": [f"Bearer {service.hs_token}"]},
             )
             if response is not None:  # just an empty json object
                 return True
@@ -147,7 +147,7 @@ class ApplicationServiceApi(SimpleHttpClient):
             response = await self.get_json(
                 uri,
                 {"access_token": service.hs_token},
-                headers={"Authorization": f"Bearer {service.hs_token}"},
+                headers={"Authorization": [f"Bearer {service.hs_token}"]},
             )
             if response is not None:  # just an empty json object
                 return True
@@ -190,7 +190,9 @@ class ApplicationServiceApi(SimpleHttpClient):
                 b"access_token": service.hs_token,
             }
             response = await self.get_json(
-                uri, args=args, headers={"Authorization": f"Bearer {service.hs_token}"}
+                uri,
+                args=args,
+                headers={"Authorization": [f"Bearer {service.hs_token}"]},
             )
             if not isinstance(response, list):
                 logger.warning(
@@ -230,7 +232,7 @@ class ApplicationServiceApi(SimpleHttpClient):
                 info = await self.get_json(
                     uri,
                     {"access_token": service.hs_token},
-                    headers={"Authorization": f"Bearer {service.hs_token}"},
+                    headers={"Authorization": [f"Bearer {service.hs_token}"]},
                 )
 
                 if not _is_valid_3pe_metadata(info):
@@ -327,7 +329,7 @@ class ApplicationServiceApi(SimpleHttpClient):
                 uri=uri,
                 json_body=body,
                 args={"access_token": service.hs_token},
-                headers={"Authorization": f"Bearer {service.hs_token}"},
+                headers={"Authorization": [f"Bearer {service.hs_token}"]},
             )
             if logger.isEnabledFor(logging.DEBUG):
                 logger.debug(
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index de97886ea9..f10cfca073 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -557,7 +557,6 @@ class RoomCreationHandler:
             invite_list=[],
             initial_state=initial_state,
             creation_content=creation_content,
-            ratelimit=False,
         )
 
         # Transfer membership events
@@ -751,6 +750,10 @@ class RoomCreationHandler:
                 )
 
         if ratelimit:
+            # Rate limit once in advance, but don't rate limit the individual
+            # events in the room — room creation isn't atomic and it's very
+            # janky if half the events in the initial state don't make it because
+            # of rate limiting.
             await self.request_ratelimiter.ratelimit(requester)
 
         room_version_id = config.get(
@@ -911,7 +914,6 @@ class RoomCreationHandler:
             room_alias=room_alias,
             power_level_content_override=power_level_content_override,
             creator_join_profile=creator_join_profile,
-            ratelimit=ratelimit,
         )
 
         if "name" in config:
@@ -1035,7 +1037,6 @@ class RoomCreationHandler:
         room_alias: Optional[RoomAlias] = None,
         power_level_content_override: Optional[JsonDict] = None,
         creator_join_profile: Optional[JsonDict] = None,
-        ratelimit: bool = True,
     ) -> Tuple[int, str, int]:
         """Sends the initial events into a new room. Sends the room creation, membership,
         and power level events into the room sequentially, then creates and batches up the
@@ -1044,6 +1045,8 @@ class RoomCreationHandler:
         `power_level_content_override` doesn't apply when initial state has
         power level state event content.
 
+        Rate limiting should already have been applied by this point.
+
         Returns:
             A tuple containing the stream ID, event ID and depth of the last
             event sent to the room.
@@ -1123,7 +1126,7 @@ class RoomCreationHandler:
             creator.user,
             room_id,
             "join",
-            ratelimit=ratelimit,
+            ratelimit=False,
             content=creator_join_profile,
             new_room=True,
             prev_event_ids=[last_sent_event_id],
@@ -1248,7 +1251,10 @@ class RoomCreationHandler:
             events_to_send.append((encryption_event, encryption_context))
 
         last_event = await self.event_creation_handler.handle_new_client_event(
-            creator, events_to_send, ignore_shadow_ban=True
+            creator,
+            events_to_send,
+            ignore_shadow_ban=True,
+            ratelimit=False,
         )
         assert last_event.internal_metadata.stream_ordering is not None
         return last_event.internal_metadata.stream_ordering, last_event.event_id, depth