add x-accel-buffering

lsst · Aug 29, 2024 · 58c1df9 · 58c1df9
1 parent 1915ffa
commit 58c1df9
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/python/lsst/daf/butler/remote_butler/server/handlers/_external_query.py b/python/lsst/daf/butler/remote_butler/server/handlers/_external_query.py
@@ -90,7 +90,15 @@ def query_execute(
             ctx,
             spec,
         )
-        return StreamingResponse(output_generator, media_type="application/jsonlines")
+        return StreamingResponse(
+            output_generator,
+            media_type="application/jsonlines",
+            headers={
+                # Instruct the Kubernetes ingress to not buffer the response,
+                # so that keep-alives reach the client promptly.
+                "X-Accel-Buffering": "no"
+            },
+        )
 
     # Mypy thinks that ExitStack might swallow an exception.
     assert False, "This line is unreachable."