Remove the experimental flag for knocking and use stable prefixes / endpoints. (#10167)

* Room version 7 for knocking.
* Stable prefixes and endpoints (both client and federation) for knocking.
* Removes the experimental configuration flag.

Author: clokep

changelog.d/10167.feature

@@ -0,0 +1 @@
+Implement "room knocking" as per [MSC2403](https://github.com/matrix-org/matrix-doc/pull/2403). Contributed by Sorunome and anoa.

synapse/api/constants.py

@@ -41,7 +41,7 @@ class Membership:
 
     INVITE = "invite"
     JOIN = "join"
-    KNOCK = "xyz.amorgan.knock"
+    KNOCK = "knock"
     LEAVE = "leave"
     BAN = "ban"
     LIST = (INVITE, JOIN, KNOCK, LEAVE, BAN)
@@ -58,7 +58,7 @@ class PresenceState:
 
 class JoinRules:
     PUBLIC = "public"
-    KNOCK = "xyz.amorgan.knock"
+    KNOCK = "knock"
     INVITE = "invite"
     PRIVATE = "private"
     # As defined for MSC3083.

synapse/api/room_versions.py

@@ -180,9 +180,9 @@ class RoomVersions:
         msc3083_join_rules=True,
         msc2403_knocking=False,
     )
-    MSC2403 = RoomVersion(
-        "xyz.amorgan.knock",
-        RoomDisposition.UNSTABLE,
+    V7 = RoomVersion(
+        "7",
+        RoomDisposition.STABLE,
         EventFormatVersions.V3,
         StateResolutionVersions.V2,
         enforce_key_validity=True,
@@ -206,6 +206,7 @@ class RoomVersions:
         RoomVersions.V6,
         RoomVersions.MSC2176,
         RoomVersions.MSC3083,
+        RoomVersions.V7,
     )
     # Note that we do not include MSC2043 here unless it is enabled in the config.
 }  # type: Dict[str, RoomVersion]

synapse/config/experimental.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
 from synapse.config._base import Config
 from synapse.types import JsonDict
 
@@ -30,9 +29,3 @@ def read_config(self, config: JsonDict, **kwargs):
 
         # MSC3026 (busy presence state)
         self.msc3026_enabled = experimental.get("msc3026_enabled", False)  # type: bool
-
-        # MSC2403 (room knocking)
-        self.msc2403_enabled = experimental.get("msc2403_enabled", False)  # type: bool
-        if self.msc2403_enabled:
-            # Enable the MSC2403 unstable room version
-            KNOWN_ROOM_VERSIONS[RoomVersions.MSC2403.identifier] = RoomVersions.MSC2403

synapse/federation/federation_client.py

@@ -90,7 +90,6 @@ def __init__(self, hs: "HomeServer"):
         self._clock.looping_call(self._clear_tried_cache, 60 * 1000)
         self.state = hs.get_state_handler()
         self.transport_layer = hs.get_federation_transport_client()
-        self._msc2403_enabled = hs.config.experimental.msc2403_enabled
 
         self.hostname = hs.hostname
         self.signing_key = hs.signing_key
@@ -621,11 +620,7 @@ async def make_membership_event(
             SynapseError: if the chosen remote server returns a 300/400 code, or
                 no servers successfully handle the request.
         """
-        valid_memberships = {Membership.JOIN, Membership.LEAVE}
-
-        # Allow knocking if the feature is enabled
-        if self._msc2403_enabled:
-            valid_memberships.add(Membership.KNOCK)
+        valid_memberships = {Membership.JOIN, Membership.LEAVE, Membership.KNOCK}
 
         if membership not in valid_memberships:
             raise RuntimeError(
@@ -989,7 +984,7 @@ async def send_request(destination: str) -> JsonDict:
             return await self._do_send_knock(destination, pdu)
 
         return await self._try_destination_list(
-            "xyz.amorgan.knock/send_knock", destinations, send_request
+            "send_knock", destinations, send_request
         )
 
     async def _do_send_knock(self, destination: str, pdu: EventBase) -> JsonDict:

synapse/federation/transport/client.py

@@ -47,7 +47,6 @@ class TransportLayerClient:
     def __init__(self, hs):
         self.server_name = hs.hostname
         self.client = hs.get_federation_http_client()
-        self._msc2403_enabled = hs.config.experimental.msc2403_enabled
 
     @log_function
     def get_room_state_ids(self, destination, room_id, event_id):
@@ -221,29 +220,14 @@ async def make_membership_event(
             Fails with ``FederationDeniedError`` if the remote destination
             is not in our federation whitelist
         """
-        valid_memberships = {Membership.JOIN, Membership.LEAVE}
-
-        # Allow knocking if the feature is enabled
-        if self._msc2403_enabled:
-            valid_memberships.add(Membership.KNOCK)
+        valid_memberships = {Membership.JOIN, Membership.LEAVE, Membership.KNOCK}
 
         if membership not in valid_memberships:
             raise RuntimeError(
                 "make_membership_event called with membership='%s', must be one of %s"
                 % (membership, ",".join(valid_memberships))
             )
-
-        # Knock currently uses an unstable prefix
-        if membership == Membership.KNOCK:
-            # Create a path in the form of /unstable/xyz.amorgan.knock/make_knock/...
-            path = _create_path(
-                FEDERATION_UNSTABLE_PREFIX + "/xyz.amorgan.knock",
-                "/make_knock/%s/%s",
-                room_id,
-                user_id,
-            )
-        else:
-            path = _create_v1_path("/make_%s/%s/%s", membership, room_id, user_id)
+        path = _create_v1_path("/make_%s/%s/%s", membership, room_id, user_id)
 
         ignore_backoff = False
         retry_on_dns_fail = False
@@ -366,12 +350,7 @@ async def send_knock_v1(
 
             The list of state events may be empty.
         """
-        path = _create_path(
-            FEDERATION_UNSTABLE_PREFIX + "/xyz.amorgan.knock",
-            "/send_knock/%s/%s",
-            room_id,
-            event_id,
-        )
+        path = _create_v1_path("/send_knock/%s/%s", room_id, event_id)
 
         return await self.client.put_json(
             destination=destination, path=path, data=content

synapse/federation/transport/server.py

@@ -567,8 +567,6 @@ async def on_PUT(self, origin, content, query, room_id, event_id):
 class FederationMakeKnockServlet(BaseFederationServerServlet):
     PATH = "/make_knock/(?P<room_id>[^/]*)/(?P<user_id>[^/]*)"
 
-    PREFIX = FEDERATION_UNSTABLE_PREFIX + "/xyz.amorgan.knock"
-
     async def on_GET(self, origin, content, query, room_id, user_id):
         try:
             # Retrieve the room versions the remote homeserver claims to support
@@ -585,8 +583,6 @@ async def on_GET(self, origin, content, query, room_id, user_id):
 class FederationV1SendKnockServlet(BaseFederationServerServlet):
     PATH = "/send_knock/(?P<room_id>[^/]*)/(?P<event_id>[^/]*)"
 
-    PREFIX = FEDERATION_UNSTABLE_PREFIX + "/xyz.amorgan.knock"
-
     async def on_PUT(self, origin, content, query, room_id, event_id):
         content = await self.handler.on_send_knock_request(origin, content, room_id)
         return 200, content
@@ -1610,6 +1606,8 @@ async def on_GET(self, origin, content, query, room_id):
     FederationVersionServlet,
     RoomComplexityServlet,
     FederationSpaceSummaryServlet,
+    FederationV1SendKnockServlet,
+    FederationMakeKnockServlet,
 )  # type: Tuple[Type[BaseFederationServlet], ...]
 
 OPENID_SERVLET_CLASSES = (
@@ -1652,12 +1650,6 @@ async def on_GET(self, origin, content, query, room_id):
 )  # type: Tuple[Type[BaseFederationServlet], ...]
 
 
-MSC2403_SERVLET_CLASSES = (
-    FederationV1SendKnockServlet,
-    FederationMakeKnockServlet,
-)
-
-
 DEFAULT_SERVLET_GROUPS = (
     "federation",
     "room_list",
@@ -1700,16 +1692,6 @@ def register_servlets(
                 server_name=hs.hostname,
             ).register(resource)
 
-        # Register msc2403 (knocking) servlets if the feature is enabled
-        if hs.config.experimental.msc2403_enabled:
-            for servletclass in MSC2403_SERVLET_CLASSES:
-                servletclass(
-                    hs=hs,
-                    authenticator=authenticator,
-                    ratelimiter=ratelimiter,
-                    server_name=hs.hostname,
-                ).register(resource)
-
     if "openid" in servlet_groups:
         for servletclass in OPENID_SERVLET_CLASSES:
             servletclass(

synapse/handlers/federation.py

@@ -2009,8 +2009,7 @@ async def on_make_knock_request(
         """
         if get_domain_from_id(user_id) != origin:
             logger.info(
-                "Get /xyz.amorgan.knock/make_knock request for user %r"
-                "from different origin %s, ignoring",
+                "Get /make_knock request for user %r from different origin %s, ignoring",
                 user_id,
                 origin,
             )
@@ -2077,8 +2076,7 @@ async def on_send_knock_request(
 
         if get_domain_from_id(event.sender) != origin:
             logger.info(
-                "Got /xyz.amorgan.knock/send_knock request for user %r "
-                "from different origin %s",
+                "Got /send_knock request for user %r from different origin %s",
                 event.sender,
                 origin,
             )

synapse/handlers/room_member.py

@@ -707,10 +707,7 @@ async def update_membership_locked(
                         knock.event_id, txn_id, requester, content
                     )
 
-        elif (
-            self.config.experimental.msc2403_enabled
-            and effective_membership_state == Membership.KNOCK
-        ):
+        elif effective_membership_state == Membership.KNOCK:
             if not is_host_in_room:
                 # The knock needs to be sent over federation instead
                 remote_room_hosts.append(get_domain_from_id(room_id))

synapse/rest/__init__.py

@@ -121,10 +121,7 @@ def register_servlets(client_resource, hs):
         account_validity.register_servlets(hs, client_resource)
         relations.register_servlets(hs, client_resource)
         password_policy.register_servlets(hs, client_resource)
-
-        # Register msc2403 (knocking) servlets if the feature is enabled
-        if hs.config.experimental.msc2403_enabled:
-            knock.register_servlets(hs, client_resource)
+        knock.register_servlets(hs, client_resource)
 
         # moving to /_synapse/admin
         admin.register_servlets_for_client_rest_resource(hs, client_resource)