41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
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/**
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* OxiCloud — whole-file BLAKE3 hashing worker.
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*
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* Computes the instant-upload ("does the server already own this?") hashes
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* OFF the main thread. The previous shape hashed every small file of a
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* batch drop sequentially on the main thread with synchronous WASM calls —
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* seconds of UI jank for a large drop, all before the first upload lane
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* even started (see collateral bench in deltaUpload.hash.test.ts).
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*
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* Protocol with the spawner (one worker handles many requests):
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* in : { id: number, file: File }
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* out : { id: number, hex: string } — success
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* { id: number, error: string } — this file failed (caller
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* falls back to plain upload)
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*/
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const WASM_GLUE_URL = '/vendors/hash-wasm/oxicloud_hash_wasm.js';
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let modPromise = null;
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function load() {
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if (!modPromise) {
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modPromise = import(WASM_GLUE_URL).then(async (mod) => {
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await mod.default();
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return mod;
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});
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}
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return modPromise;
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}
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self.onmessage = async (ev) => {
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const { id, file } = ev.data;
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try {
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const mod = await load();
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const bytes = new Uint8Array(await file.arrayBuffer());
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const hex = mod.blake3Hex(bytes);
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self.postMessage({ id, hex });
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} catch (err) {
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self.postMessage({ id, error: String(err) });
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}
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};
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