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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.client.protocol;
29  
30  import java.io.IOException;
31  
32  import org.apache.http.HttpException;
33  import org.apache.http.HttpRequest;
34  import org.apache.http.annotation.Contract;
35  import org.apache.http.annotation.ThreadingBehavior;
36  import org.apache.http.auth.AUTH;
37  import org.apache.http.auth.AuthState;
38  import org.apache.http.conn.HttpRoutedConnection;
39  import org.apache.http.conn.routing.HttpRoute;
40  import org.apache.http.protocol.ExecutionContext;
41  import org.apache.http.protocol.HttpContext;
42  import org.apache.http.util.Args;
43  
44  /**
45   * Generates authentication header for the proxy host, if required,
46   * based on the actual state of the HTTP authentication context.
47   *
48   * @since 4.0
49   *
50   * @deprecated (4.3) use {@link org.apache.http.impl.auth.HttpAuthenticator}.
51   */
52  @Deprecated
53  @Contract(threading = ThreadingBehavior.IMMUTABLE)
54  public class RequestProxyAuthentication extends RequestAuthenticationBase {
55  
56      public RequestProxyAuthentication() {
57          super();
58      }
59  
60      @Override
61      public void process(final HttpRequest request, final HttpContext context)
62              throws HttpException, IOException {
63          Args.notNull(request, "HTTP request");
64          Args.notNull(context, "HTTP context");
65  
66          if (request.containsHeader(AUTH.PROXY_AUTH_RESP)) {
67              return;
68          }
69  
70          final HttpRoutedConnection conn = (HttpRoutedConnection) context.getAttribute(
71                  ExecutionContext.HTTP_CONNECTION);
72          if (conn == null) {
73              this.log.debug("HTTP connection not set in the context");
74              return;
75          }
76          final HttpRoute route = conn.getRoute();
77          if (route.isTunnelled()) {
78              return;
79          }
80  
81          // Obtain authentication state
82          final AuthState authState = (AuthState) context.getAttribute(
83                  ClientContext.PROXY_AUTH_STATE);
84          if (authState == null) {
85              this.log.debug("Proxy auth state not set in the context");
86              return;
87          }
88          if (this.log.isDebugEnabled()) {
89              this.log.debug("Proxy auth state: " + authState.getState());
90          }
91          process(authState, request, context);
92      }
93  
94  }