update cors

index.ts

@@ -26,7 +26,7 @@ const whitelist = [
 
 var corsOptions = {
     origin: function (origin: any, callback: any) {
-        if (whitelist.indexOf(origin) !== -1) {
+        if (!origin || whitelist.indexOf(origin) !== -1) {
             callback(null, true)
         } else {
             callback(new Error('Not allowed by CORS'))