File Upload Gauntlet: Images, PDFs, Malware, and Storage Rules

File uploads are deceptively dangerous. In this workshop, participants harden an upload feature against huge files, misleading extensions, broken images, unsafe PDFs, duplicate uploads, private storage mistakes, and slow network failures.

Teams will design validation, storage naming, scanning, signed URLs, preview generation, error messages, and cleanup jobs. The goal is a file workflow that protects the system without making ordinary users feel punished.