Properly handle expired tokens on introspection endpoint

src/idpyoidc/server/oauth2/introspection.py

@@ -6,6 +6,7 @@
 from idpyoidc.server.endpoint import Endpoint
 from idpyoidc.server.token.exception import UnknownToken
 from idpyoidc.server.token.exception import WrongTokenClass
+from idpyoidc.server.exception import ToOld
 
 LOGGER = logging.getLogger(__name__)
 
@@ -103,7 +104,7 @@ def process_request(self, request=None, release: Optional[list] = None, **kwargs
             _session_info = _context.session_manager.get_session_info_by_token(
                 request_token, grant=True
             )
-        except (UnknownToken, WrongTokenClass):
+        except (UnknownToken, WrongTokenClass, ToOld):
             return {"response_args": _resp}
 
         grant = _session_info["grant"]

tests/test_server_31_oauth2_introspection.py

@@ -457,9 +457,14 @@ def test_jwt_unknown_key(self):
         _resp = self.introspection_endpoint.process_request(_req)
         assert _resp["response_args"]["active"] is False
 
-    def test_expired_access_token(self):
+    def test_expired_access_token(self, monkeypatch):
         access_token = self._get_access_token(AUTH_REQ)
-        access_token.expires_at = utc_time_sans_frac() - 1000
+        lifetime = self.session_manager.token_handler.handler["access_token"].lifetime
+
+        def mock():
+            return utc_time_sans_frac() + lifetime + 1
+
+        monkeypatch.setattr("idpyoidc.server.token.utc_time_sans_frac", mock)
 
         _context = self.introspection_endpoint.server_get("endpoint_context")