From 52235568e0bbb06093c51e61a00e468a9bdbb862 Mon Sep 17 00:00:00 2001
From: thinkerou <thinkerou@gmail.com>
Date: Fri, 27 Oct 2017 10:57:37 +0800
Subject: [PATCH] use the Get/Set function of Header

---
 render/render.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/render/render.go b/render/render.go
index 71852364..baa8f337 100644
--- a/render/render.go
+++ b/render/render.go
@@ -28,7 +28,7 @@ var (
 
 func writeContentType(w http.ResponseWriter, value []string) {
 	header := w.Header()
-	if val := header["Content-Type"]; len(val) == 0 {
-		header["Content-Type"] = value
+	if header.Get("Content-Type") == "" {
+		header.Set("Content-Type", value)
 	}
 }