The Input directive selects filters that will process incoming request data read by the Service step. Input directives are invoked when the server or plug-in first attempts to read entity body data from the client. You can add the NSAPI filters that process incoming data by invoking the insert-filter SAF in the Input stage of the request-handling process. NSAPI filters enable a function to intercept and potentially modify the content presented to or generated by another function. The Input directives are executed once per request.
The order of Input fn="insert-filter" and Output fn="insert-filter" directives in obj.conf is important if two or more filters are defined to occupy the same location in the filter stack. Filters that were inserted later will appear higher than filters that were inserted earlier.