I'm creating a widget for a Drupal site that checks the content feed for the site and returns a list of the most popular content. My feeds keep randomly disappearing or returning empty results. I know that it isn't something wrong with the url I'm using because it works sometimes, but then randomly stops. I'm using the JSON format. My Drupal installation is currently running on my localhost. Could that have something to do with it? Is there a limit on how many times I can retrieve the feed in a certain time-period?