nodejs memorystream下载文件

Question

我想知道流是否可以多次管道传输？根据文档，我看不到任何直接答案，这是我的代码示例。

var request = require('request');
var MemoryStream = require('memorystream');

var download = (options, stream) => {
  return new Promise((resolve, reject) => {
    request(options).pipe(stream).on('finish', () => {
      resolve();
    }).on('error', error => {
      reject(error);
    });
  });
};

(async () => {
  let stream = new MemoryStream(null, {
    readable: true,
    writable: true
  });
  let total = 8000, block = 3000;// will fetch by HEAD method
  for (let i = 0; i < 3; i++) {
    console.log(i);
    let from = i * block;
    let to = Math.min(total - 1, from + block - 1);
    await download({
      url: 'https://www.website.com/logo.png',
      headers: {
        'Range': 'bytes=' + from + '-' + to
      }
    }, stream);
    console.log(i + ' done');
  }
})();

输出就像“ 0 0 done 1”，那么什么也不会发生，没有错误，所以我想我使用的是错误的内存流？