symfony-cli
diff --git a/‎local/http/http.go
Copy file name to clipboardExpand all lines: local/http/http.go
+3-1Lines changed: 3 additions & 1 deletion b/‎local/http/http.go
Copy file name to clipboardExpand all lines: local/http/http.go
+3-1Lines changed: 3 additions & 1 deletion
@@ -214,7 +214,9 @@ func (s *Server) ProxyHandler(w http.ResponseWriter, r *http.Request) {
 // Handler handles HTTP requests
 func (s *Server) Handler(w http.ResponseWriter, r *http.Request) {
 	if s.AllowCORS {
-		w.Header().Add("Access-Control-Allow-Origin", "*")
+		if w.Header().Get("Access-Control-Allow-Origin") != "" {
+			w.Header().Add("Access-Control-Allow-Origin", "*")
+		}
 	}
 
 	// static file?