RequestTargetAuthentication.java revision 069490a5ca2fd1988d29daf45d892f47ad665115 
1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/protocol/RequestTargetAuthentication.java $
3 * $Revision: 673450 $
4 * $Date: 2008-07-02 10:35:05 -0700 (Wed, 02 Jul 2008) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.client.protocol;
33
34import java.io.IOException;
35
36import org.apache.commons.logging.Log;
37import org.apache.commons.logging.LogFactory;
38import org.apache.http.HttpException;
39import org.apache.http.HttpRequest;
40import org.apache.http.HttpRequestInterceptor;
41import org.apache.http.auth.AUTH;
42import org.apache.http.auth.AuthScheme;
43import org.apache.http.auth.AuthState;
44import org.apache.http.auth.AuthenticationException;
45import org.apache.http.auth.Credentials;
46import org.apache.http.protocol.HttpContext;
47
48/**
49 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
50 *
51 * @version $Revision: 673450 $
52 *
53 * @since 4.0
54 */
55public class RequestTargetAuthentication implements HttpRequestInterceptor {
56
57    private final Log log = LogFactory.getLog(getClass());
58
59    public RequestTargetAuthentication() {
60        super();
61    }
62
63    public void process(final HttpRequest request, final HttpContext context)
64            throws HttpException, IOException {
65        if (request == null) {
66            throw new IllegalArgumentException("HTTP request may not be null");
67        }
68        if (context == null) {
69            throw new IllegalArgumentException("HTTP context may not be null");
70        }
71
72        if (request.containsHeader(AUTH.WWW_AUTH_RESP)) {
73            return;
74        }
75
76        // Obtain authentication state
77        AuthState authState = (AuthState) context.getAttribute(
78                ClientContext.TARGET_AUTH_STATE);
79        if (authState == null) {
80            return;
81        }
82
83        AuthScheme authScheme = authState.getAuthScheme();
84        if (authScheme == null) {
85            return;
86        }
87
88        Credentials creds = authState.getCredentials();
89        if (creds == null) {
90            this.log.debug("User credentials not available");
91            return;
92        }
93
94        if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) {
95            try {
96                request.addHeader(authScheme.authenticate(creds, request));
97            } catch (AuthenticationException ex) {
98                if (this.log.isErrorEnabled()) {
99                    this.log.error("Authentication error: " + ex.getMessage());
100                }
101            }
102        }
103    }
104
105}
106