node学习笔记（四）--- 知识点归集

1、利用node原生封装一个求文件hash的方法

const { createHash } = require('crypto');
const { createReadStream } = require('fs');

const getFileMd5 = (filePath) => {
  return new Promise((resolve) => {
    const md5sum = createHash('md5');
    const stream = createReadStream(filePath);

    stream.on('data', (chunk) => md5sum.update(chunk));

    stream.on('end', () => resolve(md5sum.digest('hex')));
  });
};