Getting ready

To run this recipe, you can use your preferred IDE and must have Java 8 and Maven installed. As we will add support to refresh tokens for the Authorization Code and Password grant types, now we will interact with the Authorization Server and Resource Server using the already known tools that are CURL and your web browser. By running this recipe, your OAuth 2.0 Provider will be able to issue an access token and a refresh token for any registered client. This recipe still does not use any kind of persistent database to store client details and tokens and the source code can be downloaded at https://github.com/PacktPublishing/OAuth-2.0-Cookbook/tree/master/Chapter02/refresh-server.