I'm building a simple SAPUI5 app.
The app requests data from a back-end server, written with Java EE. I use Servlets as endpoint, because I want to maintain a session but it seems not to work.
When I call a servlet after login, the method
in the servlet returns null.
When I test the back-end server with Postman, it works.
I really don't know how to solve.
I'm using SAP Web IDE Personal Edition.
Thanks in advance.