Processing client requests

The invention relates to a method of processing a client request through a web server application (50) on a portable data carrier (10) and a correspondingly set up disk (10). The web server application (50) receives the client request, parses a header portion of the client request, and stores header data entries of the header data portion. In this case, from the web server application (50) are stored such header data entries that are in a predetermined first list (90) to be stored header data entries included.