[keycloak-user] passing tokens to a servlet with cors

Hi I have an upload servlet https://gist.github.com/jdc18/c6c8689e269e655581cb, I tested before without keycloak and it worked. But when I activate keycloak I get " No 'Access-Control-Allow-Origin' header is present on the requested resource.", my rest services do work with CORS. I have my page with angular and my backend with java. My backend is similar to the database service example.