Private Logistics Thumbnails: Using Signed URLs and Per-Tenant Object Storage

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A DEV Community article argues that private thumbnail delivery in multi-tenant logistics apps is mainly an access-control problem. It recommends storing image bytes and resized variants in object storage while keeping ownership and metadata in the database, then giving browsers short-lived signed URLs. The author stresses that object key prefixes help scope exports and recovery but do not replace server-side authorization checks. The piece also covers using short URL lifetimes, deterministic storage keys, and deletion workflows that avoid large database transactions around binary data. It includes a Python sketch that uploads a thumbnail and requests a signed URL through a REST storage API with retry handling for rate limits.

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