Loki: resource frontend browser cache (#110488)

feat: allow frontend to set browser cache for config endpoint
2025-09-26 07:18:20 -05:00
parent 0163d1888e
commit a8bff45256
1 changed files with 7 additions and 0 deletions
@@ -162,6 +162,13 @@ func callResource(ctx context.Context, req *backend.CallResourceRequest, sender
 	respHeaders := map[string][]string{
 		"content-type": {"application/json"},
 	}
+
+	// frontend sets the X-Grafana-Cache with the desired response cache control value
+	if len(req.GetHTTPHeaders().Get("X-Grafana-Cache")) > 0 {
+		respHeaders["X-Grafana-Cache"] = []string{"y"}
+		respHeaders["Cache-Control"] = []string{req.GetHTTPHeaders().Get("X-Grafana-Cache")}
+	}
+
 	if rawLokiResponse.Encoding != "" {
 		respHeaders["content-encoding"] = []string{rawLokiResponse.Encoding}
 	}