59a8912fba
hashBuffer (sync) + hashFile (async streaming). 1MB+ files don't block. Known-input vectors (hello, empty) verify against canonical sha1. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
27 lines
855 B
TypeScript
27 lines
855 B
TypeScript
import * as crypto from 'crypto';
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import * as fs from 'fs';
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export function hashBuffer(b: Buffer): string {
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return crypto.createHash('sha1').update(b).digest('hex');
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}
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/**
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* Streaming sha1-Hash einer Datei. Async, damit grosse Recorded-Segments
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* (oft mehrere MB) nicht den Event-Loop blockieren.
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*/
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export function hashFile(filePath: string): Promise<string> {
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return new Promise((resolve, reject) => {
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const hash = crypto.createHash('sha1');
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const stream = fs.createReadStream(filePath);
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stream.on('error', reject);
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stream.on('data', (chunk: Buffer | string) => {
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if (typeof chunk === 'string') {
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hash.update(chunk, 'utf-8');
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} else {
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hash.update(chunk);
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}
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});
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stream.on('end', () => resolve(hash.digest('hex')));
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});
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}
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