From 1c89464ba6e26cd9b06bd6826dac1c64c57a6a20 Mon Sep 17 00:00:00 2001
From: yue9944882 <291271447@qq.com>
Date: Mon, 17 Feb 2020 16:06:13 +0800
Subject: [PATCH] adding response headers

Kubernetes-commit: da6f89217d357a6683ca4a7825c673d7c2af92f0
---
 pkg/server/filters/priority-and-fairness.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkg/server/filters/priority-and-fairness.go b/pkg/server/filters/priority-and-fairness.go
index a815dc407..e0f4fe733 100644
--- a/pkg/server/filters/priority-and-fairness.go
+++ b/pkg/server/filters/priority-and-fairness.go
@@ -37,6 +37,11 @@ type priorityAndFairnessKeyType int
 
 const priorityAndFairnessKey priorityAndFairnessKeyType = iota
 
+const (
+	responseHeaderMatchedPriorityLevelConfigurationUID = "X-Kubernetes-PF-PriorityLevelUID"
+	responseHeaderMatchedFlowSchemaUID                 = "X-Kubernetes-PF-FlowSchemaUID"
+)
+
 // PriorityAndFairnessClassification identifies the results of
 // classification for API Priority and Fairness
 type PriorityAndFairnessClassification struct {
@@ -97,6 +102,8 @@ func WithPriorityAndFairness(
 			served = true
 			innerCtx := context.WithValue(ctx, priorityAndFairnessKey, classification)
 			innerReq := r.Clone(innerCtx)
+			w.Header().Set(responseHeaderMatchedPriorityLevelConfigurationUID, string(classification.PriorityLevelUID))
+			w.Header().Set(responseHeaderMatchedFlowSchemaUID, string(classification.FlowSchemaUID))
 			handler.ServeHTTP(w, innerReq)
 		}
 		digest := utilflowcontrol.RequestDigest{requestInfo, user}