From 9ed2363b66c0e2ecae25e9c061b3b22a72320da4 Mon Sep 17 00:00:00 2001
From: Adnan Maolood <me@adnano.co>
Date: Wed, 17 Feb 2021 23:05:22 -0500
Subject: [PATCH] response: Ensure that only one header is written

---
 response.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/response.go b/response.go
index a6f40f5..3932ae4 100644
--- a/response.go
+++ b/response.go
@@ -219,6 +219,10 @@ func (w *responseWriter) Write(b []byte) (int, error) {
 }
 
 func (w *responseWriter) WriteHeader(statusCode int, meta string) {
+	if w.wroteHeader {
+		return
+	}
+
 	if StatusClass(statusCode) == StatusSuccess {
 		w.bodyAllowed = true
 	}