Spring Full-Stack Practical Cases
May 20, 2024 · Backend Development
How to Fix Resource Leaks When Streaming Files in SpringBoot 3.2
This article explains why using a wrong Content‑Type header and not closing the InputStream when returning a Resource in SpringBoot 3.2 causes file‑handle leaks, and demonstrates three solutions—including try‑with‑resources, direct HttpServletResponse streaming, and custom Resource implementations—to safely download files even under high concurrency.
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