Server-Side Development 
By developing your own service functions, you can adapt the ICF to meet your individual requirements.
On the server side, the HTTP request handler plays a central role. The request handler processes incoming calls in the SAP system (that is, forwards them to the application in question) and sends back the corresponding response data to the client.
Prerequisites
The HTTP request handler must be inserted into a service in which the framework conditions for ICF processing (such as logon procedure, authorizations, security requirements) are configured.
More Information
For detailed information about developing the server functions, see.