Creating a Web Output Filter Plug-in

Uniface provides a generic mechanism that enables you to add your own JavaScript or HTML to web pages generated from dyanmic and static server pages.

1. Create a component that has an operation called filterOutput, with an IN parameter for the server page instance name and an INOUT parameter for the content to be injected into the server page.

   For example:

   operation filterOutput
   params
     string pWebComponentInstanceName : In
     string pResponseStream : InOut
   endparams
   
   <Your code here>
   
   end ; operation filterOutput

   You are entirely free in implement the component as you see fit.

2. Edit the application assignment file to add the component name to the UWEBOUTPUTFILTERS logical.

   For example:

   [LOGICALS]
   UWEBOUTPUTFILTERS = myplugin

   The components defined by this logical are activated by the Uniface USYSHTTP component in the order specified by the logical, after it has generated the response to the browser request.