formidablePromise.js

// https://github.com/felixge/node-formidable

function formidablePromise (req, opts) {
  return new Promise(function (resolve, reject) {
    var form = new formidable.IncomingForm(opts)
    form.parse(req, function (err, fields, files) {
      if (err) return reject(err)
      resolve({ fields: fields, files: files })
    }
  })
}