Javascript 如何使用nodejs和react将blob上传到服务器

我录了一个文件。现在，我以blob的形式获取记录的文件，并希望将其上载到服务器，但每当我发出请求时，我都会收到

400个错误请求

。如果我能得到帮助，我将非常感激

下面是记录文件函数和生成的blob

record = () => {
let preview = document.getElementById("preview");
let recording = document.getElementById("recording");

this.setState({ loading: true });

let recordingTimeMS = 2000;
navigator.mediaDevices
  .getUserMedia({
    video: true,
    audio: true,
  })
  .then((stream) => {
    preview.srcObject = stream;
    preview.captureStream =
      preview.captureStream || preview.mozCaptureStream;
    return new Promise((resolve) => (preview.onplaying = resolve));
  })
  .then(() => this.startRecording(preview.captureStream(), recordingTimeMS))
  .then(async (recordedChunks) => {
    let recordedBlob = new Blob(recordedChunks, {
      type: "video/webm",
    });
    recording.src = URL.createObjectURL(recordedBlob);

    this.sendVideoToAPI(recordedBlob);
  })
  .catch((err) => console.log(err));

})

这是将其上载到服务器的功能

sendVideoToAPI = async (blob) => {
const formData = new FormData();
formData.append("dataFile", blob);
console.log(blob);
Axios({
  method: "post",
  url: "http://localhost:8000/upload",
  headers: {
    "X-Requested-With": "XMLHttpRequest",
    "Access-Control-Allow-Origin": "*",
  },
  data: {
    file: formData,
  },
})
  .then((response) => {
    console.log(response);
  })
  .catch((err) => {
    console.log(err);
  });

})

这是我的server.js

app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use("/uploads", express.static("uploads"));
var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, "uploads");
  },
  filename: function (req, file, cb) {
    cb(
      null,
      `${file.fieldname}-${Date.now()}${path.extname(file.originalname)}`
    );
  },
});
var upload = multer({ storage: storage });
app.post("/upload", upload.single("dataFile"), (req, res, next) => {
  const file = req.file;
  if (!file) {
    return res.status(400).send({ message: "Please upload a file." });
  }
  return res.send({ message: "File uploaded successfully.", file });
});
app.get("/", (req, res) => {
  res.send("Giphy Chat Server is running successfully");
});

---

提前感谢

FormData需要作为正文发送，并且需要多部分内容类型标题。访问控制头在请求中是无用的…服务器必须在应用CORS时设置这些响应我在传递formData时收到相同的错误…formData需要作为正文发送，并且需要多部分内容类型头。访问控制头在请求中是无用的…服务器必须在应用CORS时在响应中设置这些头我在传递formData时收到相同的错误。。。。