Load `/capabilities` endpoint on workers (#15436)

changelog.d/15436.feature

@@ -0,0 +1 @@
+Allow loading `/capabilities` endpoint on workers.

docker/configure_workers_and_start.py

@@ -174,6 +174,7 @@ WORKERS_CONFIG: Dict[str, Dict[str, Any]] = {
             "^/_matrix/client/(r0|v3|unstable)/user/.*/filter(/|$)",
             "^/_matrix/client/(r0|v3|unstable)/password_policy$",
             "^/_matrix/client/(api/v1|r0|v3|unstable)/directory/room/.*$",
+            "^/_matrix/client/(r0|v3|unstable)/capabilities$",
         ],
         "shared_extra_conf": {},
         "worker_extra_conf": "",

docs/workers.md

@@ -235,6 +235,7 @@ information.
     ^/_matrix/client/(api/v1|r0|v3|unstable)/search$
     ^/_matrix/client/(r0|v3|unstable)/user/.*/filter(/|$)
     ^/_matrix/client/(api/v1|r0|v3|unstable)/directory/room/.*$
+    ^/_matrix/client/(r0|v3|unstable)/capabilities$
 
     # Encryption requests
     ^/_matrix/client/(r0|v3|unstable)/keys/query$

synapse/rest/__init__.py

@@ -133,8 +133,8 @@ class ClientRestResource(JsonResource):
         if is_main_process:
             room_upgrade_rest_servlet.register_servlets(hs, client_resource)
         room_batch.register_servlets(hs, client_resource)
-        if is_main_process:
         capabilities.register_servlets(hs, client_resource)
+        if is_main_process:
             account_validity.register_servlets(hs, client_resource)
         relations.register_servlets(hs, client_resource)
         password_policy.register_servlets(hs, client_resource)

synapse/rest/client/capabilities.py

@@ -33,6 +33,7 @@ class CapabilitiesRestServlet(RestServlet):
     """End point to expose the capabilities of the server."""
 
     PATTERNS = client_patterns("/capabilities$")
+    CATEGORY = "Client API requests"
 
     def __init__(self, hs: "HomeServer"):
         super().__init__()