code: def fetch
        begin
          request = HTTParty.get(feed_url)
        rescue StandardError => e
          Mako.errors.add_error "Could not complete request to #{feed_url}: #{e.class}."
          self.ok = false
          return self
        end
        unless request.code == 200
          Mako.errors.add_error "Request to #{feed_url} returned #{request.code}."
          self.ok = false
          return self
        end
        self.headers = request.headers
        self.body = request.body
        self
      end
docs: Performs HTTP request on the given feed_url. Sets the Mako::FeedRequester
   body attribute equal to the request body if successful and returns self.
   If the request fails, @ok is set to false.
  
   @return [Mako::FeedRequester]