From a3bd5d52ff30f24e4190b2f517b37006b7e7778a Mon Sep 17 00:00:00 2001
From: Catherine Fang <yinghongfang@google.com>
Date: Mon, 13 Mar 2023 11:13:01 -0400
Subject: [PATCH] Only use OpenMetrics and Text in contentType

---
 pkg/metricshandler/metrics_handler.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/metricshandler/metrics_handler.go b/pkg/metricshandler/metrics_handler.go
index 4ebb9e441f..ed31c68bc9 100644
--- a/pkg/metricshandler/metrics_handler.go
+++ b/pkg/metricshandler/metrics_handler.go
@@ -187,6 +187,9 @@ func (m *MetricsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	contentType := expfmt.NegotiateIncludingOpenMetrics(r.Header)
 
+	if contentType != expfmt.FmtOpenMetrics {
+		contentType = expfmt.FmtText
+	}
 	resHeader.Set("Content-Type", string(contentType))
 
 	if m.enableGZIPEncoding {