Multipart form parse error - Invalid boundary in multipart: None

Question

I am very frustrated and could not find the soloution:

I am creating a project using angularjs and nodejs.I get image data from angular side in node js and send this data to further api.I got error

{
  "error": {
    "detail": "Multipart form parse error - Invalid boundary in multipart: None"
  }
}

here is my code in nodejs side:

var request = require('request');
    console.log(req.files);
var data = {

        website:'www.gamail.xom',
        contact_number:'dsdsd',
        services_offered:'dsadasd',
        contact_name:'dasdas',
        provider_category:'exchange',
        email:'kk@gmail.com',
        image:req.files

    }
var api_url = global.common.base_url + 'vcard/1.0.0/visit_card/' + req.param('uuid') +'/';
    request({
        url: api_url,
        method: 'PUT',
        headers: {
            'Content-Type': 'multipart/form-data',
            'Authorization': 'Bearer '+req.cookies.apitoken
        },
        json: data

    }, function(error, response, body) {
        if(response.statusCode == 200 && !error){
            res.end(JSON.stringify(body));
        }else{          
            res.send(response.statusCode, { error: body });
        }
    });
}

In req.files i get

{ image:
   [ { fieldName: 'image[0]',
       originalFilename: 'icon_dd_chart_grey.png',
       path: 'C:\\Users\\karakuma\\AppData\\Local\\Temp\\op74_gLSzPs-_49aT1GF0si
7.png',
       headers: [Object],
       size: 1474,
       name: 'icon_dd_chart_grey.png',
       type: 'image/png' } ] }

Answer 1

Try defining the content type as follows.

content_type='multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW'

I was facing the same issue and it worked for me in python.

Answer 2

I also faced this issue while trying to upload file. For me the issue was the FormData, which was coming as Object instead of FormData instance

So i converted my object to FormData using below code:

const getFormData = object => Object.keys(object).reduce((formData, key) => {
            formData.append(key, object[key]);
            return formData;
        }, new FormData());

And the just executed my post request, in my case using Vue resource:

return Vue.http.post(url,
        getFormData(formData),
        {
            headers: {
                'Content-Type': 'multipart/form-data'
            }
        });

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>

Answer 3

There is no need to mention the content type in header, fetch() will detect it's content type by itself.

let formData = new FormData()
formData.append("email", email);
formData.append("password", password);
formData.append("image", image);

const response = await fetch('http://localhost:8000/api/authentication/register/', {
                method: 'POST',
                headers: {'X-CSRFToken': csrftoken}, //django specific
                body: formData,
            });

Answer 4

I have been facing this problem in angular 11 connected to Django rest API, I was able to curl with something like this in order to upload a JSON with a form:

curl -X POST -S \
  -H 'Accept: application/json' \
  -u "user:password" \
  -F "name=name" \
  -F "label=mylabel" \
  -F "otherfields=something" \
  -F "photo=@./example.png;type=image/png" \
  http://127.0.0.1:8000/api/v1/item/

But I was getting that exception using my header as httpOptions:

'content-type': 'multipart/form-data',

So I just commented out the content-type and it seems angular is so clever that he creates the header for you and will set the multipart together with the boundaries.

For more information on this: What is the boundary in multipart/form-data?

Answer 5

let data = fs.createReadStream('/home/insert/screen03.jpg');
    let form = new FormData();

    form.append('files', data, 'test.jpg');

    form.getLength((err, length) => {
        if (err) { reject(err); }
        let headers = Object.assign({ 'Content-Length': length, 'Authorization': `Token b84db005a7fc1e5471a763aa42fcc5734b7bb22a` }, form.getHeaders());
        return axios.post(`http://192.168.88.252:8000/resources/`, form, { headers: headers })
            .then(res => console.log(res.data))
            .catch(error => console.log(error.response.data))
    });