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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.conn;
29  
30  import java.net.InetAddress;
31  
32  import org.apache.http.HttpException;
33  import org.apache.http.HttpHost;
34  import org.apache.http.HttpRequest;
35  import org.apache.http.ProtocolException;
36  import org.apache.http.annotation.Immutable;
37  import org.apache.http.client.config.RequestConfig;
38  import org.apache.http.client.protocol.HttpClientContext;
39  import org.apache.http.conn.SchemePortResolver;
40  import org.apache.http.conn.UnsupportedSchemeException;
41  import org.apache.http.conn.routing.HttpRoute;
42  import org.apache.http.conn.routing.HttpRoutePlanner;
43  import org.apache.http.protocol.HttpContext;
44  import org.apache.http.util.Args;
45  
46  /**
47   * Default implementation of an {@link HttpRoutePlanner}. It will not make use of
48   * any Java system properties, nor of system or browser proxy settings.
49   *
50   * @since 4.3
51   */
52  @Immutable
53  public class DefaultRoutePlanner implements HttpRoutePlanner {
54  
55      private final SchemePortResolver schemePortResolver;
56  
57      public DefaultRoutePlanner(final SchemePortResolver schemePortResolver) {
58          super();
59          this.schemePortResolver = schemePortResolver != null ? schemePortResolver :
60              DefaultSchemePortResolver.INSTANCE;
61      }
62  
63      public HttpRoute determineRoute(
64              final HttpHost host,
65              final HttpRequest request,
66              final HttpContext context) throws HttpException {
67          Args.notNull(request, "Request");
68          if (host == null) {
69              throw new ProtocolException("Target host is not specified");
70          }
71          final HttpClientContext clientContext = HttpClientContext.adapt(context);
72          final RequestConfig config = clientContext.getRequestConfig();
73          final InetAddress local = config.getLocalAddress();
74          HttpHost proxy = config.getProxy();
75          if (proxy == null) {
76              proxy = determineProxy(host, request, context);
77          }
78  
79          final HttpHost target;
80          if (host.getPort() <= 0) {
81              try {
82                  target = new HttpHost(
83                          host.getHostName(),
84                          this.schemePortResolver.resolve(host),
85                          host.getSchemeName());
86              } catch (final UnsupportedSchemeException ex) {
87                  throw new HttpException(ex.getMessage());
88              }
89          } else {
90              target = host;
91          }
92          final boolean secure = target.getSchemeName().equalsIgnoreCase("https");
93          if (proxy == null) {
94              return new HttpRoute(target, local, secure);
95          } else {
96              return new HttpRoute(target, local, proxy, secure);
97          }
98      }
99  
100     protected HttpHost determineProxy(
101             final HttpHost target,
102             final HttpRequest request,
103             final HttpContext context) throws HttpException {
104         return null;
105     }
106 
107 }