Google Apps Script for posting photo on Google+

function createPost() {
  var userId = 'me';
  var msg = '使用 Google Apps Script 發消息+圖片';
  var img = 'https://developers.google.com/apps-script/images/carousel0.png';
  
  var blob = UrlFetchApp.fetch(img).getBlob().setContentTypeFromExtension();
 
  var media = PlusDomains.newMedia();
  
  var result = PlusDomains.Media.insert(media, userId, 'cloud', blob);  
  
  var attachement = PlusDomains.newActivityObjectAttachments();
  attachement.objectType = 'photo';
  attachement.id = result.id; 
  
  var activity = PlusDomains.newActivity();
  activity.object = PlusDomains.newActivityObject();
  activity.object.originalContent = msg;
  activity.object.attachments = [attachement];
  activity.access = PlusDomains.newAcl();
  activity.access.items = [{type:'domain'}];
  activity.access.domainRestricted = true;
  
  PlusDomains.Activities.insert(activity, userId);
  
}