node.js - Node : Read data, 将其转换并使用流和管道写入文件

Question

我尝试从文本文件中读取字符串，对其进行编码并保存到文件中。我想使用 pipe 将 hash 从 ReadStream 传输到 WriteStream。但我不知道如何转换更改后的数据。我的代码:

const crypto = require('crypto');
const fs = require('fs');
let hash = crypto.createHash('md5');
var rs = fs.createReadStream('./passwords.txt');
var ws = fs.createWriteStream('./new_passwords.txt');


rs.on('data', function(d) {
  hash.update(d);
});
rs.on('end', function(d) {
    console.log(hash.digest('hex'))
});

Answer 1

根据the documentation它应该很简单:

const fs = require('fs')
const crypto = require('crypto')
const hash = crypto.createHash('md5')
const rs = fs.createReadStream('./plain.txt')
const ws = fs.createWriteStream('./hashed.txt')

rs.pipe(hash).pipe(ws)