20 lines
713 B
JavaScript
20 lines
713 B
JavaScript
import { HashCalculator } from "./HashCalculator";
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export const readableStreamHasher = (hashCtor, readableStream) => {
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if (readableStream.readableFlowing !== null) {
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throw new Error("Unable to calculate hash for flowing readable stream");
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}
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const hash = new hashCtor();
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const hashCalculator = new HashCalculator(hash);
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readableStream.pipe(hashCalculator);
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return new Promise((resolve, reject) => {
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readableStream.on("error", (err) => {
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hashCalculator.end();
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reject(err);
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});
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hashCalculator.on("error", reject);
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hashCalculator.on("finish", () => {
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hash.digest().then(resolve).catch(reject);
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});
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});
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};
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