Fix backwards compat for DirectServerJsonResource

As that appears in the module API.

Broke in #18595.

Author: erikjohnston

Cargo.lock

@@ -53,7 +53,7 @@ def __init__(
             hs: homeserver
             handler: function to be called to handle the request.
         """
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
         self._handler = handler
 
     async def _async_render(self, request: Request) -> Optional[Tuple[int, Any]]:

synapse/http/additional_resource.py

@@ -42,15 +42,17 @@
     Protocol,
     Tuple,
     Union,
+    cast,
 )
 
 import attr
 import jinja2
 from canonicaljson import encode_canonical_json
 from zope.interface import implementer
 
-from twisted.internet import defer, interfaces
+from twisted.internet import defer, interfaces, reactor
 from twisted.internet.defer import CancelledError
+from twisted.internet.interfaces import IReactorTime
 from twisted.python import failure
 from twisted.web import resource
 
@@ -401,8 +403,15 @@ class DirectServeJsonResource(_AsyncResource):
     """
 
     def __init__(
-        self, clock: Clock, canonical_json: bool = False, extract_context: bool = False
+        self,
+        canonical_json: bool = False,
+        extract_context: bool = False,
+        # Clock is optional as this class is exposed to the module API.
+        clock: Optional[Clock] = None,
     ):
+        if clock is None:
+            clock = Clock(cast(IReactorTime, reactor))
+
         super().__init__(clock, extract_context)
         self.canonical_json = canonical_json
 
@@ -460,7 +469,7 @@ def __init__(
         extract_context: bool = False,
     ):
         self.clock = hs.get_clock()
-        super().__init__(self.clock, canonical_json, extract_context)
+        super().__init__(canonical_json, extract_context, clock=self.clock)
         # Map of path regex -> method -> callback.
         self._routes: Dict[Pattern[str], Dict[bytes, _PathEntry]] = {}
         self.hs = hs

synapse/http/server.py

@@ -44,7 +44,7 @@ class FederationWhitelistResource(DirectServeJsonResource):
     PATH = "/_synapse/client/v1/config/federation_whitelist"
 
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
 
         self._federation_whitelist = hs.config.federation.federation_domain_whitelist
 

synapse/rest/synapse/client/federation_whitelist.py

@@ -33,7 +33,7 @@
 
 class JwksResource(DirectServeJsonResource):
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs.get_clock(), extract_context=True)
+        super().__init__(clock=hs.get_clock(), extract_context=True)
 
         # Parameters that are allowed to be exposed in the public key.
         # This is done manually, because authlib's private to public key conversion

synapse/rest/synapse/client/jwks.py

@@ -35,7 +35,7 @@ class OIDCBackchannelLogoutResource(DirectServeJsonResource):
     isLeaf = 1
 
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
         self._oidc_handler = hs.get_oidc_handler()
 
     async def _async_render_POST(self, request: SynapseRequest) -> None:

synapse/rest/synapse/client/oidc/backchannel_logout_resource.py

@@ -62,7 +62,7 @@ def pick_username_resource(hs: "HomeServer") -> Resource:
 
 class AvailabilityCheckResource(DirectServeJsonResource):
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
         self._sso_handler = hs.get_sso_handler()
 
     async def _async_render_GET(self, request: Request) -> Tuple[int, JsonDict]:

synapse/rest/synapse/client/pick_username.py

@@ -30,7 +30,7 @@ class MSC4108RendezvousSessionResource(DirectServeJsonResource):
     isLeaf = True
 
     def __init__(self, hs: "HomeServer") -> None:
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
         self._handler = hs.get_rendezvous_handler()
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:

synapse/rest/synapse/client/rendezvous.py

@@ -86,7 +86,7 @@ class ClientWellKnownResource(DirectServeJsonResource):
     isLeaf = 1
 
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs.get_clock())
+        super().__init__(clock=hs.get_clock())
         self._well_known_builder = WellKnownBuilder(hs)
 
     async def _async_render_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:

synapse/rest/well_known.py

@@ -401,7 +401,7 @@ async def callback(request: SynapseRequest) -> None:
 
 class CancellableDirectServeJsonResource(DirectServeJsonResource):
     def __init__(self, clock: Clock):
-        super().__init__(clock)
+        super().__init__(clock=clock)
         self.clock = clock
 
     @cancellable