How to send data correct axios Error: Multipart: Boundary not found

Question

I don't know why I receive on server [Error: Multipart: Boundary not found] and bundle.js:37628 POST http://localhost:8800/exporttocsv 500 (Internal Server Error) When I make post through

<form action="/exporttocsv" method="POST"  encType="multipart/form-data">

post works correctly, but through axios doesn't work.

Please help me fix the mistake

this my code /--client

import axios from 'axios'
var formData = new FormData()

const config = { headers: { 'Content-Type': 'multipart/form-data' } };
export const ipmortToCSV = (file) => dispatch => {

formData.append('file',file)
console.log(formData.getAll('data'))

axios.post('/exporttocsv', {
          "UploadCommand": formData
      },config)
      .then(function (response) {
        console.log(response);
      })
      .catch(function (error) {
        console.log(error);
      });

//--server

const router = require('express').Router()
var csv = require('csv-express')
const controllers = require('../../controllers/exporttocsv')
var multer  = require('multer')
var upload = multer({dest : 'exporttocsv/'})

router.get('/', (req, res) => {
      controllers.exportToCsv(req,res)
  })
router.post('/',upload.single('file'),(req,res) => { 
    //controllers.importToCsv(req,res)
})

module.exports = router

Answer 1

I was struggling with this issue of multipart boundary not found with fetch api calling to a nestjs server. What I tried was to remove the

'Content-Type': 'multipart/form-data',

headers so that Fetch api automatically set the headers and it worked. Try it out