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Previously we looked at using DFE to help make scripts that utilize XML to make it more readable and easier to parameterize.  There is another way to use DFE, beyond making a script more readable.  Sometimes DFE may be required for the script to run properly.  Some applications use what is called GWT (Google Web Toolkit).  To use GWT DFE, first you need to identify when an application is using GWT.

There is the obvious way that LoadRunner recognizes GWT.  You’ll see the following message in the Error tab of the messag Read Entire Entry

DFE is short for Data Format Extension.  It is a feature added to LoadRunner back in version 11, but a lot of people don’t understand what it is and how it can help you.  In simple terms DFE allows for easier LoadRunner scripting by allowing us to decode and encode normally unreadable or formatted data that the may be sent between the client and the server.  A simple example would be converting a long XML request into a more readable format.  Another example would be converting an unreadable Base 64 request into something that Read Entire Entry