always cors

main.go

@@ -39,8 +39,9 @@ func (c Config) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if r.Method == http.MethodOptions {
 	cors(w)
+	if r.Method == http.MethodOptions {
+		w.WriteHeader(http.StatusOK)
 		return
 	}
 
@@ -77,7 +78,6 @@ func cors(w http.ResponseWriter) {
 	w.Header().Set("Content-Length", "0")
 	w.Header().Set("Content-Type", "text/plain")
 	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, OPTIONS, TRACE, PATCH, HEAD, DELETE")
-	w.WriteHeader(http.StatusOK)
 }
 
 func (c Config) key(r *http.Request) string {