title: Download and encode image in base64 using JavaScript
body: <p>lets say i have a URL given. I would like to:</p>
  
  <p>1) download it and convert to base64
  2) upload it to some key/value storage (as text)
  3) download it from key/value storage (with text/plain mimetype), reencode it from base64, display it.</p>
  
  <p>Best Regards </p>