Neat library, thanks a lot :)
But unfortunately the client lacks support for ssl connections and authentication.
The good news: Ssl was introduced to Qhttp/QSocket in Qt4.3 - piece of cake to make use of it in QuteXR.
I created a patch (against the current svn version) to allow authentication and ssl encrypted connections. Username/password, port, scheme etc. are encoded into QUrl thus making interface changes unnecessary - everything works out of the box: The constuctor/setUrl()-method decide depending on the url-scheme whether the connection should be ssl-encrypted or not and also take care of authentication if logon credentials are passed along with the url.
Could you please build a new release for Qt4.x? Or least put a note on the welcome page that Qt4 users should checkout the svn version.
patch adding support for ssl and http authentication to XRClient