What is the exact request header origin for cordova app?

We have a feature that can view PDF file on mobile app, but there was issue regarding the CORS. I already configured the headers and the exact origin which is http://localhost:12672 from the azure CORS rules. But we always ecounter this error:

XMLHttpRequest cannot load http://*******.com/cdn/storage/****/bB4zgMFrCP…&sv=2016-05-31&sr=b&sig=GNv6Xq2T3SWsl1HhOQ29sFlhSed%2FIC30%2BAUcfdlIDBk%3D. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:12672' is therefore not allowed access.

Thanks :slight_smile: