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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.impl.client;
29  
30  import org.apache.http.annotation.Immutable;
31  import org.apache.http.client.methods.HttpDelete;
32  import org.apache.http.client.methods.HttpGet;
33  import org.apache.http.client.methods.HttpHead;
34  import org.apache.http.client.methods.HttpPost;
35  
36  /**
37   * Lax {@link org.apache.http.client.RedirectStrategy} implementation
38   * that automatically redirects all HEAD, GET and POST requests.
39   * This strategy relaxes restrictions on automatic redirection of
40   * POST methods imposed by the HTTP specification.
41   *
42   * @since 4.2
43   */
44  @Immutable
45  public class LaxRedirectStrategy extends DefaultRedirectStrategy {
46  
47      /**
48       * Redirectable methods.
49       */
50      private static final String[] REDIRECT_METHODS = new String[] {
51          HttpGet.METHOD_NAME,
52          HttpPost.METHOD_NAME,
53          HttpHead.METHOD_NAME,
54          HttpDelete.METHOD_NAME
55      };
56  
57      @Override
58      protected boolean isRedirectable(final String method) {
59          for (final String m: REDIRECT_METHODS) {
60              if (m.equalsIgnoreCase(method)) {
61                  return true;
62              }
63          }
64          return false;
65      }
66  
67  }