axios.post download file code example

Example 1: axios file upload

const formData = new FormData();
const imagefile = document.querySelector('#file');
formData.append("image", imagefile.files[0]);
axios.post('upload_file', formData, {
    headers: {
      'Content-Type': 'multipart/form-data'
    }
})

Example 2: download file axios nodejs

export async function downloadFile(fileUrl: string, outputLocationPath: string) {
  const writer = createWriteStream(outputLocationPath);

  return Axios({
    method: 'get',
    url: fileUrl,
    responseType: 'stream',
  }).then(response => {

    //ensure that the user can call `then()` only when the file has
    //been downloaded entirely.

    return new Promise((resolve, reject) => {
      response.data.pipe(writer);
      let error = null;
      writer.on('error', err => {
        error = err;
        writer.close();
        reject(err);
      });
      writer.on('close', () => {
        if (!error) {
          resolve(true);
        }
        //no need to call the reject here, as it will have been called in the
        //'error' stream;
      });
    });
  });
}
This way, you can call downloadFile(), call then() on the returned promise, and making sure that the downloaded file will have completed processing.

Or, if you use a more modern version of NodeJS, you can try this instead:

import * as stream from 'stream';
import { promisify } from 'util';

const finished = promisify(stream.finished);

export async function downloadFile(fileUrl: string, outputLocationPath: string): Promise<any> {
  const writer = createWriteStream(outputLocationPath);
  return Axios({
    method: 'get',
    url: fileUrl,
    responseType: 'stream',
  }).then(async response => {
    response.data.pipe(writer);
    return finished(writer); //this is a Promise
  });
}