mono
2f7a491666
Source-only publication of reviewed commit 64e96a7f423673dc29ad56485be9fc79bce8af1c.
Passed in isolation: focused frontend/backend tests, race checks, TypeScript typecheck, lint, Go compilation, Flowgram build, and deterministic SDK build/tests.
Not accepted as a production release: Next.js export/native assembly remains blocked by environment memory limits; browser interaction and MySQL staging acceptance remain unverified. No production server, database/schema, runtime configuration, deployment, release tag, or workflow execution was performed.
Expected source tree: 0a4a7528e9.
14 lines
768 B
TypeScript
14 lines
768 B
TypeScript
/**
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* Retry identity for a selected attachment. A file picker returns a fresh File
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* object on reselection; metadata alone can also collide across different bytes.
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*/
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export async function getMessageFileIdentity(file: Pick<File, "name" | "type" | "arrayBuffer">) {
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const bytes = await file.arrayBuffer()
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const subtle = globalThis.crypto?.subtle
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// Self-hosted HTTP deployments may lack WebCrypto. Exact bytes provide a
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// collision-free in-memory fallback, rather than silently weakening the key.
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const digest = subtle ? await subtle.digest("SHA-256", bytes) : bytes
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const key = Array.from(new Uint8Array(digest), (byte) => byte.toString(16).padStart(2, "0")).join("")
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return JSON.stringify([file.name, file.type, subtle ? "sha256" : "bytes", key])
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}
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