michael@0: /*
michael@0:  * ====================================================================
michael@0:  * Licensed to the Apache Software Foundation (ASF) under one
michael@0:  * or more contributor license agreements.  See the NOTICE file
michael@0:  * distributed with this work for additional information
michael@0:  * regarding copyright ownership.  The ASF licenses this file
michael@0:  * to you under the Apache License, Version 2.0 (the
michael@0:  * "License"); you may not use this file except in compliance
michael@0:  * with the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *   http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing,
michael@0:  * software distributed under the License is distributed on an
michael@0:  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0:  * KIND, either express or implied.  See the License for the
michael@0:  * specific language governing permissions and limitations
michael@0:  * under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.impl.client;
michael@0: 
michael@0: import java.util.List;
michael@0: import java.util.Map;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.Header;
michael@0: import ch.boye.httpclientandroidlib.HttpResponse;
michael@0: import ch.boye.httpclientandroidlib.HttpStatus;
michael@0: import ch.boye.httpclientandroidlib.auth.AUTH;
michael@0: import ch.boye.httpclientandroidlib.auth.MalformedChallengeException;
michael@0: import ch.boye.httpclientandroidlib.auth.params.AuthPNames;
michael@0: import ch.boye.httpclientandroidlib.client.AuthenticationHandler;
michael@0: import ch.boye.httpclientandroidlib.protocol.HttpContext;
michael@0: 
michael@0: /**
michael@0:  * Default {@link AuthenticationHandler} implementation for target host
michael@0:  * authentication.
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class DefaultTargetAuthenticationHandler extends AbstractAuthenticationHandler {
michael@0: 
michael@0:     public DefaultTargetAuthenticationHandler() {
michael@0:         super();
michael@0:     }
michael@0: 
michael@0:     public boolean isAuthenticationRequested(
michael@0:             final HttpResponse response,
michael@0:             final HttpContext context) {
michael@0:         if (response == null) {
michael@0:             throw new IllegalArgumentException("HTTP response may not be null");
michael@0:         }
michael@0:         int status = response.getStatusLine().getStatusCode();
michael@0:         return status == HttpStatus.SC_UNAUTHORIZED;
michael@0:     }
michael@0: 
michael@0:     public Map<String, Header> getChallenges(
michael@0:             final HttpResponse response,
michael@0:             final HttpContext context) throws MalformedChallengeException {
michael@0:         if (response == null) {
michael@0:             throw new IllegalArgumentException("HTTP response may not be null");
michael@0:         }
michael@0:         Header[] headers = response.getHeaders(AUTH.WWW_AUTH);
michael@0:         return parseChallenges(headers);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected List<String> getAuthPreferences(
michael@0:             final HttpResponse response,
michael@0:             final HttpContext context) {
michael@0:         @SuppressWarnings("unchecked")
michael@0:         List<String> authpref = (List<String>) response.getParams().getParameter(
michael@0:                 AuthPNames.TARGET_AUTH_PREF);
michael@0:         if (authpref != null) {
michael@0:             return authpref;
michael@0:         } else {
michael@0:             return super.getAuthPreferences(response, context);
michael@0:         }
michael@0:     }
michael@0: 
michael@0: }
michael@0: