Don't let security be an afterthought. Spring Security in Action, Second Edition is your vital companion to robust, secure applications that are protected right from the first line of code.Spring Security in Action, Second Edition is a revised version of the bestselling original, fully updated for Spring Boot 3 and Oauth2/OpenID Connect.In Spring Security in Action, Second Edition you will learn essential security skills including how to:Implement and customize authentication and authorizationSet up all components of an OAuth2/OpenID Connect systemUtilize CRSF and CORS configurationsSecure Spring reactive applicationsWrite tests for security configurationsWhether you’re a beginner or a pro, Spring Security in Action, Second Edition teaches you how to secure your Java applications from the ground up. Author Laurentiu Spilca distills his years of experience as a skilled Java and Spring developer into an indispensable guide to everything security—from authentication and authorization, to testing security configurations. This new edition covers the latest patterns for application-level security in Spring apps, demonstrating how Spring Security simplifies every step of the security process.Foreword by Joe Grandja.Purchase of the print book includes a free eBook in PDF and ePub formats from Manning Publications.About the technologySpring Security makes it much, much easier to secure enterprise-scale Java applications. This powerful framework integrates with Spring apps end to end, with “secure by design” principles and ready-to-use features that help you implement robust authorization and authentication and protect against data theft and intrusions. And like everything else in the Spring ecosystem, it’s free, open source, and backed by the awesome team at VMWare.About the bookSpring Security in Action, Second Edition updates this bestselling guide to Spring Security to include deep coverage of OAuth2/OpenID Connect and security configuration using the new SecurityFilterChain. The crystal clear explanations and relevant examples, teach you how to build your own authorization server, configure secure endpoints, and prevent cross-site scripting and request forgery attacks.What's insideCustom authentication and authorizationCRSF and CORS configurationsSecure Spring reactive applicationsWrite tests for security configurationsAbout the readerFor experienced Java and Spring developers.About the authorLaurentiu Spilca is a skilled Java and Spring developer and an experienced technology instructor. He is also the author of Manning’s Spring Start Here and Troubleshooting Java. Table of ContentsPART 11 Security today2 Hello, Spring SecurityPART 23 Managing users4 Managing passwords5 A web app’s security begins with filters6 Implementing authenticationsPART 37 Configuring endpoint-level authorization: Restricting access8 Configuring endpoint-level authorization: Applying restrictions9 Configuring CSRF protection10 Configuring CORS11 Implementing authorization at the method level12 Implementing filtering at the method levelPART 413 What are OAuth 2 and OpenID Connect?14 Implementing an OAuth 2 authorization server15 Implementing an OAuth 2 resource server16 Implementing an OAuth 2 clientPART 517 Implementing security in reactive applicationsPART 618 Testing security configurations