How to form and send a React Js Principal to a Spring Boot application?

Question

JavaScript

Hello, the situation is as follows:
There is a Spring Boot app that is built in war
It has controllers that wait for some data (json object) and security information (Principal) as input
As far as I understand, the Principal, Session and the entire security context are initialized by spring under the hood themselves and allow themselves to be used
. There is also a React Js app that is responsible for the UI and passes the data entered by the user to the spring service, but in itself it does not have Principal
Question: is there an analogue of this class in React and how to initialize it for further transfer to the spring application?

Answer 1

The React app needs to send the data that Spring needs to construct the Principal. A common option is a JWT token. Or a session ID. Or something else, you need to look at the specifics of how Spring Security is configured in your application.