我正在尝试将此代码翻译为与node-fetch一起使用，但我有点纠结于弄清楚node-fetch如何转发整个req比特，因为它包含了我想要上传的文件。

async function handler(req, res) {
  let uploadPhotoAddress = baseURL + "/upload";
  if (req.method == "POST") {
    const { data } = await axios.post(uploadPhotoAddress, req, {
      responseType: "stream",
      headers: {
        "Content-Type": req.headers["content-type"], // which is multipart/form-data with boundary included
        apikey,
      },
    });
    data.pipe(res);
  } else {
    return res.status(405).json({ message: "Method Not Allowed" });
  }
}