RESTful Web Services

In this tutorial, you will learn how to add a Social Login(OAuth 2) feature into your Spring MVC Web application. This will allow users to login to your application with their social network accounts like Facebook, Google, or other large services that support OAuth 2 like for example GitHub. Spring Security 5 offers very good…

Read More Spring Security OAuth 2 Social Login

In this tutorial, you will learn how to use @AuthenticationPrincipal annotation to get the Jwt object containing the details of a provided in HTTP Request access token. When we send a request containing an access token in the Authorization header, behind the scenes,  Spring Framework will do a lot of work and if all is good,…

Read More @AuthenticationPrincipal – Getting the Jwt Claims

HATEOAS is a way to make your RESTful Web Service endpoint, automatically include links to other Resources of your API, in the response that it sends back to a calling client application.  The client application that consumes your web service endpoint, can then use those links, to consume other RESTful Resources that your Web Service…

Read More Add HATEOAS to Spring Boot RESTful Web Service

In this Spring Security tutorial, you will learn how to use the @PreAuthorize annotation to secure method invocation. You can use the @PreAuthorize annotation to secure either method in a Controller class or a method in a service layer class. There are other useful method level security annotations like the ones below. It is useful…

Read More Spring Security @PreAuthorize Annotation Example

In this Spring Security tutorial, you will learn how to enable and use the Method Level Security with @Secured annotation. There are other useful method level security annotations like the ones below. It is useful to know how they work as well. @PostAuthorize Security Annotation Example, @PreAuthorize Security Annotation Example. If you are interested in video…

Read More Spring Security @Secured Annotation Example

In this tutorial, you will learn how to make Zuul API Gateway pass an Authorization header to a downstream Microservice. To learn how to make Spring Boot Microservice read HTTP Request headers, please read this tutorial: Read HTTP Request Header in Spring MVC. Configure Zuul API Gateway to Forward an Authorization Header By default, Zuul…

Read More Pass Authorization Header to Downstream Microservice

In this tutorial, I will share how to generate a self-signed certificate and enable HTTPS/SSL support in a Spring Boot application. You will also learn how to configure the RestTemplate HTTP client to use the same self-signed certificate to communicate with your Web Service over HTTPS. Let’s start by generating a self-signed certificate. Generate Self-Signed…

Read More Enable HTTPs/SSL in Spring Boot App

In this Spring Boot tutorial, you will learn how to get the details of the currently authenticated principal user. There is more than one way to get currently authenticated user details and in this blog post, I am going to share with you a few. Most likely you already have Spring Security configured for your…

Read More Spring Security. Get Authenticated Principal Details.

In this Spring Security tutorial, you will learn how to enable Basic Authentication for your Spring Boot project and configure the default username, password and user role. You will also learn how to secure a web service request URL so only authenticated users with a default username, password and role can access it. If you use…

Read More Spring Security Default Username, Password, Role

This tutorial will teach you how to add Spring Security to your project and enable in-memory basic authentication. You will learn how to configure two different users with different Roles and Privileges. Both users’ roles and privileges will be stored in the memory of your Spring Boot application. If you use Spring Framework and OAuth,…

Read More Spring Security In-Memory Authentication

In this Spring Boot tutorial, you will learn how to implement User Authentication(User Login) functionality for your RESTful Web Service built with Spring Boot, Spring MVC, Spring Security using JWT. There is also a step-by-step video demonstration on how to do User Authentication available here. The user authentication functionality we are going to implement in…

Read More User Authentication – Spring Boot, Spring Security, JWT

This tutorial will teach you how to bind nested properties from the application.properties file to a Java class. Once you finish this tutorial, you might also want to check: How to bind simple(not nested) properties to a Java class, and How to use @ConfigurationProperties with Spring Boot @Profile. Example of Nested Properties in a Properties File…

Read More Spring Boot Nested Properties with @ConfigurationProperties