UI: Fix HTTPException import that turned a 400 into a 500 in ui/dags

airflow-core/src/airflow/api_fastapi/core_api/routes/ui/dags.py

@@ -17,10 +17,9 @@
 
 from __future__ import annotations
 
-from http.client import HTTPException
 from typing import Annotated
 
-from fastapi import Depends, status
+from fastapi import Depends, HTTPException, status
 from sqlalchemy import and_, func, select
 from sqlalchemy.orm import defaultload
 

airflow-core/tests/unit/api_fastapi/core_api/routes/ui/test_dags.py

@@ -352,6 +352,13 @@ def test_latest_run_should_response_403(self, unauthorized_test_client):
         response = unauthorized_test_client.get(f"/dags/{DAG1_ID}/latest_run")
         assert response.status_code == 403
 
+    def test_latest_run_should_response_400_when_dag_id_is_tilde(self, test_client):
+        response = test_client.get("/dags/~/latest_run")
+        assert response.status_code == 400
+        assert response.json() == {
+            "detail": "`~` was supplied as dag_id, but querying multiple dags is not supported."
+        }
+
     @pytest.mark.parametrize(
         ("query_params", "expected_dag_count"),
         [