challenges.put("basic", new BasicHeader(AUTH.WWW_AUTH, "Basic realm=\"realm1\""));
challenges.put("digest", new BasicHeader(AUTH.WWW_AUTH, "Digest realm=\"realm2\", nonce=\"1234\""));
final Registry<AuthSchemeProvider> authSchemeRegistry = RegistryBuilder.<AuthSchemeProvider>create()
.register("basic", new BasicSchemeFactory())
.register("digest", new DigestSchemeFactory()).build();
context.setAuthSchemeRegistry(authSchemeRegistry);
final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(new AuthScope("somehost", 80, "realm2"),
new UsernamePasswordCredentials("user", "pwd"));