s3 upload as stream using req stream (extra info in request header)

client.js

const file = this.input.files[0];
//console.log(file);
var xhr = new XMLHttpRequest();
xhr.addEventListener('load', (e) => {
  console.log(e.target.response);
});
xhr.open('POST', host + 'fileuploadstream', true);
xhr.setRequestHeader('body', JSON.stringify({ id: 'somebucketfolderid', fn: file.name }));
xhr.send(file);

s3-stream-put.js

const fileUploadStream = (req, res) => {
  //get "body" args from header
  const { id, fn } = JSON.parse(req.get('body'));
  const Key = id + '/' + fn; //upload to s3 folder "id" with filename === fn
  const params = {
    Key,
    Bucket: bucketName, //set somewhere
    Body: req, //req is a stream
  };
  s3.upload(params, (err, data) => {
    if (err) {
      res.send('Error Uploading Data: ' + JSON.stringify(err) + '\n' + JSON.stringify(err.stack));
    } else {
      res.send(Key);
    }
  });
};

This does not work properly with express. Am I missing something?

@spsneo are you using express bodyParser? using that might remove req.files