From dccd4e3b72108d258c2ba60bd76406055e3e25e0 Mon Sep 17 00:00:00 2001
From: lihang212010 <38468839+lihang212010@users.noreply.github.com>
Date: Fri, 16 Oct 2020 14:17:48 +0800
Subject: [PATCH] Update json.go

---
 render/json.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/render/json.go b/render/json.go
index 41863093..d026bfaa 100644
--- a/render/json.go
+++ b/render/json.go
@@ -52,6 +52,9 @@ var jsonAsciiContentType = []string{"application/json"}
 
 // Render (JSON) writes data with custom ContentType.
 func (r JSON) Render(w http.ResponseWriter) (err error) {
+	if _, isJson := r.Data.([]byte); isJson {
+		return
+	}
 	if err = WriteJSON(w, r.Data); err != nil {
 		panic(err)
 	}