{ AuthorizationHeader ah=new AuthorizationHeader("Digest");
ah.addUsernameParam(username);
ah.addRealmParam(realm);
ah.addNonceParam(nonce);
ah.addUriParam(uri);
if (algorithm!=null) ah.addAlgorithParam(algorithm);
if (opaque!=null) ah.addOpaqueParam(opaque);
/*
if (qop!=null) ah.addQopParam(qop);
if (nc!=null) ah.addNcParam(nc);
*/