REACT JS Error: 501 Not implemented issue while uploading csv file

REACT JS Error: 501 Not implemented issue while uploading csv file

我遇到了这些错误:

POST http://localhost:4000/api/v1/upload/csv-order-upload/single net::ERR_ABORTED 501(未实现)

我正在使用这些代码:

让headers = {'Content-Type': 'multipart/form-data;'};

headers["Authorization"] = `Bearer $(token)`;
const formData = new FormData();

formData.append(
  "csv",
  this.state.selectedFile,
  this.state.selectedFile.name
);

const parameters = {
  method: "POST",
  headers: headers,
  
  body: formData,
};
fetch('http://localhost:4000/api/v1/upload/csv-order-upload/single',
parameters)
  .then((response) => {
    console.log("reactNativeDemo", "response get details:" + response);
  })
  .catch((error) => {
    console.log("axios error:", error);
  });
};

在后端添加了 'application/vnd.ms-excel' 到 mimetype

在 React 前端中,在调用 API

之前删除了 content-type

添加了以下代码:

删除headers["Content-Type"]; 参数 = { 方法:“POST”, headers: headers, body:价值观, };