node.js hashing files

hash-lib.js

const crypto = require('crypto');
const fs = require('fs');

/**
 * @typedef {object} HashFileOptions
 * @prop {string} [algorithm = 'md5'] алгоритм хеширования
 * @prop {crypto.HexBase64Latin1Encoding} [encoding = 'hex'] предствалние конечного хеша
 */

/**
 * @param {fs.ReadStream} inputStream 
 * @param {HashFileOptions} [options]
 */
async function hashFile(inputStream, options = {}) {
  return new Promise((resolve, reject) => {
    const { algorithm = 'md5', encoding = 'hex' } = options;
    const hash = crypto.createHash(algorithm);

    inputStream
      .on('error', reject)
      .on('data', data => hash.update(data))
      .on('end', () => resolve(hash.digest(encoding)))
  });
}

async function getHashManifest(filesList) {
  const manifest = {};

  const promises = filesList.map(file => {
    return hashFile(fs.createReadStream(file))
      .then(hash => manifest[file] = hash)
  });

  return Promise
    .all(promises)
    .then(() => manifest)
}

module.exports = {
  hashFile,
  getHashManifest
}

hash.js

const crypto = require('node:crypto')
const { pipeline } = require('node:stream/promises')

async function computeHash(stream, algorithm = 'md5', encoding = 'hex') {
  const hash = crypto.createHash(algorithm)
  await pipeline(stream, hash)
  return hash.digest(encoding)
}

index.js

const path = require('path');
const { getHashManifest } = require('./hash-lib');

const files = [
  path.join(__dirname, 'public', 'style.css'),
  path.join(__dirname, 'public', 'client.js'),
  path.join(__dirname, 'index.js'),
  path.join(__dirname, '.env'),
  path.join(__dirname, 'package.json'),
];

getHashManifest(files)
  .then(console.log)
  .catch(console.error)