Spring Full-Stack Practical Cases

Jun 30, 2025 · Backend Development

Secure File Downloads in Spring Boot 3: Token‑Based Links & Path‑Traversal Protection

This article explains how to protect file downloads in Spring Boot by generating short‑lived or token‑based URLs, preventing static URL exposure, handling path‑traversal attacks, supporting in‑memory or streamed files, and optionally tying downloads to authenticated users.