Design safer image uploads using object storage

Start with security

An uploaded filename, MIME declaration or extension cannot be trusted alone. Limit input size and permitted file types, verify content, generate server-side storage keys and apply quota controls.

Basic architecture

User → application authorization
     → temporary upload authorization
     → object storage
     → post-upload validation
     → controlled delivery URL

Operational choices

• Public vs private bucket rules
• Signed URLs and expiry handling
• Transformation pipeline and image metadata stripping
• Object lifecycle and storage retention
• Access logs and abuse monitoring
• Backups separate from the live bucket

Cost check

Compare storage, operations, outbound traffic, image transformations and regional constraints. Current vendor pricing must be checked on the official product page.