我有一个文件，我已经使用crypto.createCipher对其进行了加密，现在我想对该文件进行流传输并在流传输时解密。

我编写了以下代码，但是当我设置“ Content-Range”和“ accept-Ranges”标头时，流媒体无法正常工作。

如何使用内容范围对它进行流式传输和解密？

  const path = "file path";
  const stat = fs.statSync(path);
  const fileSize = stat.size;
  const range = req.headers.range;

  const algorithm = 'aes-256-ctr';
  const password = '123456';
  const encrypt = crypto.createCipher(algorithm,password);
  const decrypt = crypto.createDecipher(algorithm,password);

  if (range) {
    const parts = range.replace(/bytes=/,"").split("-");
    const start = parseInt(parts[0],10);
    const end = parts[1] ? parseInt(parts[1],10) : fileSize - 1;

    const chunksize = end - start + 1;
    const file = fs.createReadStream(path,{ start,end });
    const head = {
      "Content-Range": `bytes ${start}-${end}/${fileSize}`,"accept-Ranges": "bytes","Content-Length": chunksize,"Content-Type": "video/mp4"
    };

    res.writeHead(200,head);
    file
        .pipe(decrypt)
        .pipe(res);
  } else {
    const head = {
      "Content-Length": fileSize,"Content-Type": "video/mp4"
    };
    res.writeHead(200,head);
    fs.createReadStream(path).pipe(decrypt).pipe(res);
  }