How to authenticate by DIGEST auth. method?

Hi,

I want to consume a webservice which does only support DIGEST authentication.

I am using th cl_http_client normaly for communicating with simple services. This class only supports BASIC Authentication. I tried to get the headers and implement the RFC myself but seems it won't work. I can not get the header before the connection is finally closed.

Can anybody give me a hint or show me how I can authenticate via DIGEST?

Thanks in advance.