title: How can I load an MS Excel file, add content and send to user?
body: <p>I need to load a template MS Excel file, add content to some cells and then download it via the user's browser, so he can open and/or save the file.</p>
  
  <p>I managed to create some MS Excel workbooks in the past, but this seems somewhat different. How could I do it?</p>
  
  <p>Thanks in advance,</p>
  
  <p>gtludwig</p>