Assuming that you already have your environment ready to work with Java-having the JDK and an IDE to work with-please proceed to the Spring Initializr and set up your project. We'll start by building our boilerplate web application in Spring Boot. Note: If you prefer to go straight into the theory, please skip to the following section. Building Our Sample ProjectĪlright, so before we explore the principles of cross-origin resource share, let's make sure your environment is ready so you can follow along with us. If this is not the case, please check out the Spring Boot guide for some excellent starting material. We want to stress that this article depends on having previous knowledge of the Kotlin and Spring Boot development stack. Finally, we will modify our sample project to make use of cross-origin resource share, explore some ways issues might arise, and address them.īy the end of this post, you should have an understanding of CORS and a basic implementation of it in a Spring Boot project. Then we will explore the theory behind CORS, how it works, and why you might need it. We will first introduce our sample project, which will be our basis for illustrating the concept of cross-origin resource share. We will explore how to enable CORS on a simple Spring Boot RESTful web service using Kotlin. In this article, we will be examining the concepts of CORS, or cross-origin resource share.

Spring with kotlin