NodeJS, Axios - post file from local server to another server

Question

I have an API endpoint that lets the client post their csv to our server then post it to someone else server. I have done our server part which save uploaded file to our ser

Answer 1

I'm thinking the createReadStream is your issue because its async. try this. Since createReadStream extends the event emitter, we can "listen" for when it finishes/ends.

var newFile = fs.createReadStream(file.path);

// personally I'd function out the inner body here and just call 
// to the function and pass in the newFile
newFile.on('end', function() {
  const form_data = new FormData();
  form_data.append("file", newFile);
  const request_config = {
    method: "post",
    url: url,
    headers: {
        "Authorization": "Bearer " + access_token,
        "Content-Type": "multipart/form-data"
    },
    data: form_data
  };
  return axios(request_config);
});

Answer 2

This is what you really need:

const form_data = new FormData();
form_data.append("file", fs.createReadStream(file.path));

const request_config = {
  headers: {
    "Authorization": "Bearer " + access_token,
    "Content-Type": "multipart/form-data"
  },
  data: form_data
};

return axios
  .post(url, form_data, request_config);

Answer 3

The 2 oldest answers did not work for me. This, however, did the trick:

const FormData = require('form-data'); // npm install --save form-data

const form = new FormData();
form.append('file', fs.createReadStream(file.path));

const request_config = {
  headers: {
    'Authorization': `Bearer ${access_token}`,
    ...form.getHeaders()
  }
};

return axios.post(url, form, request_config);

form.getHeaders() returns an Object with the content-type as well as the boundary.
For example:

{ "content-type": "multipart/form-data; boundary=-------------------0123456789" }