Xiaolin Talks Programming

Jun 17, 2026 · Backend Development

Production-Grade Large File Upload in Spring Boot: Chunking, Resume & OSS Direct Transfer

This article details a production-ready Spring Boot large file upload architecture covering chunked protocol design, async server-side merging with zero-copy FileChannel, OSS/MinIO direct upload via presigned URLs, resumable transfer with Redis chunk tracking, and security hardening including magic-number validation and rate limiting.