Add server param to /publicRooms

synapse/handlers/room.py

@@ -443,6 +443,16 @@ class RoomListHandler(BaseHandler):
         self.remote_list_request_cache.set((), deferred)
         self.remote_list_cache = yield deferred
 
+    @defer.inlineCallbacks
+    def get_remote_public_room_list(self, server_name):
+        res = yield self.hs.get_replication_layer().get_public_rooms(
+            [server_name]
+        )
+
+        if server_name not in res:
+            raise SynapseError(404, "Server not found")
+        defer.returnValue(res[server_name])
+
     @defer.inlineCallbacks
     def get_aggregated_public_room_list(self):
         """

synapse/rest/client/v1/room.py

@@ -295,14 +295,25 @@ class PublicRoomListRestServlet(ClientV1RestServlet):
 
     @defer.inlineCallbacks
     def on_GET(self, request):
+        server = request.args.get("server", [None])[0]
+
         try:
             yield self.auth.get_user_by_req(request)
-        except AuthError:
+        except AuthError as e:
-            # This endpoint isn't authed, but its useful to know who's hitting
+            # We allow people to not be authed if they're just looking at our
-            # it if they *do* supply an access token
+            # room list, but require auth when we proxy the request.
+            # In both cases we call the auth function, as that has the side
+            # effect of logging who issued this request if an access token was
+            # provided.
+            if server:
+                raise e
+            else:
                 pass
 
         handler = self.hs.get_room_list_handler()
+        if server:
+            data = yield handler.get_remote_public_room_list(server)
+        else:
             data = yield handler.get_aggregated_public_room_list()
 
         defer.returnValue((200, data))