Book Image

Hands-On Spring Security 5 for Reactive Applications

By : Tomcy John
Book Image

Hands-On Spring Security 5 for Reactive Applications

By: Tomcy John

Overview of this book

Spring Security enables developers to seamlessly integrate authorization, authentication, and a range of security features for complex enterprise applications. This book provides a hands-on approach to developing reactive applications using Spring and will help you get up and running in no time. Complete with step-by-step explanations, practical examples, and self-assessment questions, the book begins by explaining the essential concepts of reactive programming, Spring Framework, and Spring Security. You’ll then learn about a variety of authentication mechanisms and how to integrate them easily with a Spring MVC application. You’ll also understand how to achieve authorization in a Spring WebFlux application using Spring Security. Furthermore, the book will take you through the configuration required to implement OAuth2 for securing REST APIs, and guide you in integrating security in microservices and serverless applications. Finally, you’ll be able to augment add-ons that will enhance any Spring Security module. By the end of the book, you’ll be equipped to integrate Spring Security into your Java enterprise applications proficiently.
Table of Contents (15 chapters)
Title Page
Copyright and Credits
Packt Upsell

Spring WebFlux authorization

Similar to authentication, the core concepts, in regard to authorization remains similar to what we have seen earlier in Spring MVC. However, the classes performing the operation have changed, and are, reactive and non-blocking. The following diagram shows the authorization-related main classes and their interactions in a Spring WebFlux application:

Figure 8: Authorization-related classes in a Spring WebFlux application

As we all know by now, Spring WebFlux security works on WebFilter, and AuthorizationWebFilter intercepts the request and uses ReactiveAuthorizationManager to check whether the Authentication object has access to a protected resource. ReactiveAuthorizationManager has two methods, namely, check (checks whether access is granted to an Authentication object) and verify (checks whether access has to be granted for an Authentication object). In the event of any exception, ExceptionTranslationWebFilter takes care of handling this by following the appropriate...