overleaf/services/web/app/src/Features/Helpers/AsyncFormHelper.js

const _ = require('lodash')

module.exports = {
  redirect
}

// redirect the request via headers or JSON response depending on the request
// format
function redirect(req, res, redir) {
  if (_.get(req, ['headers', 'accept'], '').match(/^application\/json.*$/)) {
    res.json({ redir })
  } else {
    res.redirect(redir)
  }
}