title: Google Spreadsheets: Is there a HTTP request function?
body: <p>Does Google Spreadsheets have a cell function that lets me do HTTP requests like </p>
  
  <p>POST the contents of this cell to <a href="http://www.mysite.com/input" rel="noreferrer">http://www.mysite.com/input</a> or</p>
  
  <p>GET the XML at <a href="http://www.mysite.com/feed.xml" rel="noreferrer">http://www.mysite.com/feed.xml</a></p>
  
  <p>?</p>
  
  <p>Or can I write a custom function that does so?  Or is there a more conventional way of doing what I want to do? (using Spreadsheets to talk to REST APIs)</p>