SPTPersistentCache

Developed and used by Spotify in production, ensuring robustness and stability for caching critical data like images and API responses.

Each cache entry includes a TTL header, allowing precise expiration management and automatic data freshness, as shown in the demo for 30-day defaults.

Includes redundancy checks in file headers to detect and handle corrupted data, enhancing data integrity for persistent storage.

Allows files to be locked to bypass TTL expiration, useful for offline content that must persist, as mentioned in Spotify's use case for cover art.