From 1adb697cdb23d64242d858fb616942a9b8ded49c Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.link>
Date: Thu, 4 Aug 2016 20:40:36 +0100
Subject: [PATCH] Only compress if client sets `Accept-Encoding` header (fixes
 #14)

---
 simplehttp2server.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/simplehttp2server.go b/simplehttp2server.go
index 9e3f982..25442ac 100644
--- a/simplehttp2server.go
+++ b/simplehttp2server.go
@@ -80,10 +80,13 @@ func main() {
 	if !*disableGzip {
 		oldfs := fs
 		fs = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Encoding", "gzip")
-			grw := GzipResponseWriter{gzip.NewWriter(w), w}
-			oldfs.ServeHTTP(grw, r)
-			grw.WriteCloser.Close()
+			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+				w.Header().Set("Content-Encoding", "gzip")
+				grw := GzipResponseWriter{gzip.NewWriter(w), w}
+				defer grw.WriteCloser.Close()
+				w = grw
+			}
+			oldfs.ServeHTTP(w, r)
 		})
 	}