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03.21.07
Spry 1.5 - New "Session Expired" Support
By Raymond Camden
I blogged about the Spry 1.5 preview a few days ago and finally made time to whip up a quick demo of one of the new features - Session Handling
First and foremost - let me explain exactly what is meant by this. As you know, ColdFusion can't alert you when your session expires. It is a server side event. So obviously Spry can't get the notification from the server.
Instead what Spry supports is noticing a particular result from the server. So imagine a site with a login system. Typically you hit the site. Log in. Access the data. Now imagine you sit there on a Spry-ified page and let your session time out. You click to load a new page of AJAX data and Spry throws an error. Why? Because the back end returned a login form instead of a proper XML (or JSON) result.
So what to do? Well you now return a message to your AJAX requests. This message is the literal string: session expired. It doesn't need to be in XML. If Spry sees this as the result of a data request, it will then fire off an event. So consider this simple page:
Continue reading this article.
About the Author:
Raymond Camden, ray@camdenfamily.com
http://ray.camdenfamily.com
Raymond Camden is Vice President of Technology for roundpeg, Inc. A long
time ColdFusion user, Raymond has worked on numerous ColdFusion books
and is the creator of many of the most popular ColdFusion community web
sites. He is an Adobe Community Expert, user group manager, and the
proud father of three little bundles of joy.
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