cached request

new module

var rssResults;

function fetchRSSResults() {
  /* queue up a re-get in 15 minutes */
  setTimeout(fetchRSSResults, 15*60*1000);
  
  http.get(url...);
  
  // parse the rss
  
  rssResults = result;
  return rssResults;
}

exports.getRSS = function () {

   if( !rssResults ) {
     return fetchRSSResults();
   }

   return rssResults;
}

old module

exports.getRSS = function () { /* return rss results */ }