In this article, we demonstrate how to use AWS S3 Presigned URLs in a Spring Boot application to offload file transfers, reduce server load and improve performance. We cover required dependencies, configuration, IAM policy, generation of Presigned URLs and integration testing with LocalStack and Testcontainers.

Reflectoring offers practical insights and real-world examples for software developers, covering topics such as microservices, domain-driven design (DDD), and software architecture. Developers can learn about architectural patterns, design principles, and best practices for building scalable and maintainable software systems.

Reflectoring

Learn how to offload file transfers from an application server to the client using Presigned URLs in a Spring Boot application. These time-limited URLs allow for secure uploads and downloads directly to/from a storage solution like Amazon S3.

Offloading File Transfers with Amazon S3 Presigned URLs in Spring Boot

Enabling Cross-Origin Resource Sharing (CORS)

Integration Testing with LocalStack and Testcontainers