HttpDigestAuthenticationClient.java

/**
 * Copyright 2005-2014 Restlet
 * 
 * The contents of this file are subject to the terms of one of the following
 * open source licenses: Apache 2.0 or or EPL 1.0 (the "Licenses"). You can
 * select the license that you prefer but you may not use this file except in
 * compliance with one of these Licenses.
 * 
 * You can obtain a copy of the Apache 2.0 license at
 * http://www.opensource.org/licenses/apache-2.0
 * 
 * You can obtain a copy of the EPL 1.0 license at
 * http://www.opensource.org/licenses/eclipse-1.0
 * 
 * See the Licenses for the specific language governing permissions and
 * limitations under the Licenses.
 * 
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly at
 * http://restlet.com/products/restlet-framework
 * 
 * Restlet is a registered trademark of Restlet S.A.S.
 */

package org.restlet.example.authentication;

import java.io.IOException;

import org.restlet.data.ChallengeRequest;
import org.restlet.data.ChallengeResponse;
import org.restlet.data.ChallengeScheme;
import org.restlet.data.Status;
import org.restlet.resource.ClientResource;
import org.restlet.resource.ResourceException;

public class HttpDigestAuthenticationClient {

    public static void main(String[] args) throws ResourceException,
            IOException {
        // Prepare the request
        ClientResource cr = new ClientResource("http://localhost:8182/");

        ChallengeRequest c1 = null;
        // first try: unauthenticated request
        try {
            cr.get();
        } catch (ResourceException re) {
            if (Status.CLIENT_ERROR_UNAUTHORIZED.equals(cr.getStatus())) {
                c1 = getDigestChallengeRequest(cr);
            }
        }

        // second try: authenticated request
        if (c1 != null) {
            ChallengeResponse c2 = new ChallengeResponse(c1, cr.getResponse(),
                    "scott", "tiger".toCharArray());
            cr.setChallengeResponse(c2);
            cr.get().write(System.out);
        }
    }

    private static ChallengeRequest getDigestChallengeRequest(ClientResource cr) {
        ChallengeRequest c1 = null;
        for (ChallengeRequest challengeRequest : cr.getChallengeRequests()) {
            if (ChallengeScheme.HTTP_DIGEST
                    .equals(challengeRequest.getScheme())) {
                c1 = challengeRequest;
                break;
            }
        }
        return c1;
    }
}