Session Expired sample

This page demonstrates how to detect and handle the case when the server is reporting that a session has expired.

It requires ColdFusion scripting enabled on the server.

The list of cities on the right side of the states is loaded by the 'dsCities' XMLDataSet using a server page that receives the state name as a parameter.
However, this page throws a session expired message after five requests (five clicks on the states), so the "expired" state for that spry:region is going to be displayed.

By default, XMLDataSet looks for "session expired" message in the text response that comes from the server or in the XML-formatted response. If such a message is found, the "expired" state is set for all the spry:regions that depend on the current DataSet.

What is the response required from the server in order for XMLDataSet to detect "session expired" state?

• Send this string as the response:

  session expired

• Send this xml as the response:

  <?xml version="1.0" encoding="utf-8"?>
  <reply>session expired</reply>

• Send any kind of response, but make sure to pass a checker function to the XMLDataSet that will lookup your custom response:

  // the checker receives a request object
  function MySessionExpiredChecker(req)
  {
  	  if (req.xhRequest.responseText == 'my custom session expired string')
  		    return true;
  	  return false;
  }
  // pass this function to the dataset
  ds1.setSessionExpiredChecker(MySessionExpiredChecker);