middleware: fix set Vary header (#640)

go-chi · Jan 3, 2022 · b750c80 · b750c80
1 parent 55dd7fc
commit b750c80
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/middleware/compress.go b/middleware/compress.go
@@ -318,7 +318,7 @@ func (cw *compressResponseWriter) WriteHeader(code int) {
 	if cw.encoding != "" {
 		cw.compressable = true
 		cw.Header().Set("Content-Encoding", cw.encoding)
-		cw.Header().Set("Vary", "Accept-Encoding")
+		cw.Header().Add("Vary", "Accept-Encoding")
 
 		// The content-length after compression is unknown
 		cw.Header().Del("Content-Length")