HTTP Handler strange behavior when updating HR data

Question

Hi there,
Brief summary: Executing a function module from inside a HTTP Handler gives a different result than executing the function module direcly through SE37. The user defined for the SICF service calling the Handler is the same as the one we use for SE37.
Details:
We have created an HTTP Handler implementing the interface IF_HTTP_EXTENSION.
We have also defined a new service through SICF that access the previous Handler.
We have a web application accessing SAP through that HTTP Handler.
Within our HTTP Handler (within the IF_HTTP_EXTENSION~HANDLE_REQUEST method), we are calling a custom function module that perform different actions depending on the parameters received.
The solution works really well but we have identified an issue for some actions: when we execute some background updates (like calling HR_INFOTYPE_OPERATION) and the transaction returns an error, the HTTP Handler suddenly stops and the HTTP call returns an error.
The strange thing is that executing the function module directly (without calling the HTTP handler from the web) captures the error and continues the execution of the function module.
It seems that when the function module gets called from the Handler, there is some screen or user parameters that affect the result of the transaction, and we cannot find the way to capture that error and let the Handler to continue.
Any idea, suggestion, alternative solution would be much appreciated
Best regards,
Miguel

Answer 1

Hi Olivier, thanks for your reply, nice to see you are still out there
You raise a good point. We are reusing an "old" web app that was connecting to SAP through the DCOM connector. The RFC (the function module I mentioned on my first post) cannot be modified as it handles tons of different web calls, so we decided to call that RFC from the Handler.
It may not be the best solution, but the web app has been modified to call the different handlers (for the different environments) and still hope to find a work around our current problem.
Other than that, it works really well and performance is amazing
Thanks again,
Miguel