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Cross-Origin Storage (COS) #68

@tomayac

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@tomayac (Google)

Summary

The Cross-Origin Storage (COS) proposal outlines the design of a potential new Web platform API, which allows web applications to store and retrieve files across different origins with explicit user consent. Using concepts introduced in File System Living Standard defined by the WHATWG, the COS API facilitates secure cross-origin file storage and retrieval for large files, such as AI models, SQLite databases, offline storage archives, and WebAssembly (Wasm) modules. Taking inspiration from Cache Digests for HTTP/2, the API uses file hashes for integrity.

(This proposal is an early design sketch by Chrome Developer Relations to describe the problem and solicit feedback on the proposed solution. It has not been approved to ship in Chrome.)

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