code: function () {
  			var self = this;
  			console.log('updating...');
  			var req = get_req();
  			req.onreadystatechange = function update_state_response () {
  				if (req.readyState === 4) {
  					if (req.status === 200) {
  						var capture = JSON.parse(req.responseText);
  						if (capture.error) {
  							alert(capture.error.message);
  						}
  						htracr.ui.update(capture);
  						console.log('updated.');
  					} else {
  					  console.log('no updates.');
  					}
  				}
  			};
  			req.open("GET", "/conns", true);
  			req.send("");
  			return false;
  		}
docs: get the latest capture info from the server