Google Apps Script to produce Twilio TWIML

twiml.gs

function doGet(e) {
  
  var toNum = e.parameter.PhoneNumber;
  var fromNum = e.parameter.CallerId;
  var action = e.parameter.Direction;
  var record = e.parameter.Record;
  Logger.log(e);
  
  var output = ContentService.createTextOutput();
  var xml = createDialTWIML(fromNum, toNum, action);
  output.setMimeType(ContentService.MimeType.XML);
  output.setContent(xml);
  return output;
}

function createDialTWIML(fromNum, toNum, action, record) {
  
  var root = XmlService.createElement('Response');
   var say = XmlService.createElement('Say')
    .setAttribute('voice', 'alice')
    .setAttribute('language', 'en-US')
    .setText('This call will be recorded');
  root.addContent(say);
  
     
  var dial = XmlService.createElement('Dial')
    .setAttribute('callerId', fromNum)
    .setAttribute('timeout','60')
    .setAttribute('record','record-from-answer');
  
  
  var number =  XmlService.createElement('Number').setText(toNum);
  dial.addContent(number);
  
  root.addContent(dial);
  var document = XmlService.createDocument(root);
  var xml = XmlService.getPrettyFormat().format(document);
  Logger.log(xml);
  return xml;
}