Creating a default HTTP handler...

Question

Could someone tell me if there is a way to force all HTTP (or specifically SOAP) messages to go through a custom handler? I know how to create a custom handler for a specific service, but what I really want is a sniffer, something that will intercept all web traffic and record metrics for certain message types (web services).
Thanks,
         -David-

Answer 1

You should be able to install a handler at a high level and interpret all calls that that come through that node and the lower ones.  The SICF handlers are processed in a hierarchy.  They are processed one by one until a handler finally sets the flag to no further processing is necessary.
Check out the weblog on ALFS.
<a href="/people/brian.mckellar/blog/2005/06/12/bsp-in-depth-abap-look-and-feel-service">BSP In-Depth: ABAP Look and Feel Service</a>
ALFS does this very thing.  SAP inserts a new handler that intercepts all calls through the Unified Renderer. The key here is to set the following:
if_http_extension~flow_rc = if_http_extension=>co_flow_ok.
This tells the framwork to continue processing through the Service Node Handler stack.