Chapter 6: Security (Authorization and Authentication)

In previous chapters, we have developed RESTful web services (where REST stands for REpresentational State Transfer) using imperative and reactive coding styles. Now, you'll learn how you can secure these REST endpoints using Spring Security. You'll implement token-based authentication and authorization for REST endpoints. A successful authentication provides two types of tokens—a JavaScript Object Notation (JSON) Web Token (JWT) as an access token, and a refresh token in response. This JWT-based access token is then used to access the secured Uniform Resource Locators (URLs). A refresh token is used to request a new JWT if the existing JWT has expired, and a valid request token provides a new JWT to use.

You'll associate users with roles such as Admin, User, and so on. These roles will be used as authorization to make sure that REST endpoints can only be accessed if a user holds certain roles. We&apos...