JSON Web Token (JWT) pronounced “jat” is an authentication and authorization widely used in modern apps. In this mechanism, when the user logs in with their credentials, the server generates a unique key called the JWT token that it sends to the client. The client would then include the JWT Read more
If you are a Java programmer chances are that you have worked with Spring Boot and you may or may not have heard of project reactor, WebFlux etc. In case you haven’t, then Spring Project Reactor is a spring library with which you can build Spring Reactive systems i.e. asynchronous Read more
In this post, you will see how to catch ExpiredJwtException in OncePerRequestFilter class and send a meaningful error message from a Spring Boot app . Background I came across this issue after I implemented JWT authentication in the file-sharing-app. As the JWT token functionality was being tested, I realised that Read more
In this post, you will see code samples for how to add basic authentication to Spring Boot API. The code samples in this post will show how to secure certain endpoints with Spring security such that they can be only accessed via the correct username and password. This post will Read more
In this post, you will see code samples for how to upload a file to AWS S3 bucket from a Java Spring Boot app. The code you will see here is from one of my open-source repositories on Github, called document-sharing. Problem Let’s say you are building a document sharing Read more
In this post, you will see how to build a full stack application using Spring boot API with ReactJS frontend. In the last few years, microservices have been all the rage and people are increasingly turning towards using them. The way people talk about the benefits of Microservices can at Read more
