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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  import java.net.URI;
32  import java.net.URISyntaxException;
33  import java.util.ArrayList;
34  import java.util.Date;
35  import java.util.List;
36  
37  import org.apache.commons.logging.Log;
38  import org.apache.commons.logging.LogFactory;
39  import org.apache.http.Header;
40  import org.apache.http.HttpException;
41  import org.apache.http.HttpHost;
42  import org.apache.http.HttpRequest;
43  import org.apache.http.HttpRequestInterceptor;
44  import org.apache.http.annotation.Immutable;
45  import org.apache.http.client.CookieStore;
46  import org.apache.http.client.config.CookieSpecs;
47  import org.apache.http.client.config.RequestConfig;
48  import org.apache.http.client.methods.HttpUriRequest;
49  import org.apache.http.config.Lookup;
50  import org.apache.http.conn.routing.RouteInfo;
51  import org.apache.http.cookie.Cookie;
52  import org.apache.http.cookie.CookieOrigin;
53  import org.apache.http.cookie.CookieSpec;
54  import org.apache.http.cookie.CookieSpecProvider;
55  import org.apache.http.cookie.SetCookie2;
56  import org.apache.http.protocol.HttpContext;
57  import org.apache.http.util.Args;
58  import org.apache.http.util.TextUtils;
59  
60  /**
61   * Request interceptor that matches cookies available in the current
62   * {@link CookieStore} to the request being executed and generates
63   * corresponding {@code Cookie} request headers.
64   *
65   * @since 4.0
66   */
67  @Immutable
68  public class RequestAddCookies implements HttpRequestInterceptor {
69  
70      private final Log log = LogFactory.getLog(getClass());
71  
72      public RequestAddCookies() {
73          super();
74      }
75  
76      @Override
77      public void process(final HttpRequest request, final HttpContext context)
78              throws HttpException, IOException {
79          Args.notNull(request, "HTTP request");
80          Args.notNull(context, "HTTP context");
81  
82          final String method = request.getRequestLine().getMethod();
83          if (method.equalsIgnoreCase("CONNECT")) {
84              return;
85          }
86  
87          final HttpClientContext clientContext = HttpClientContext.adapt(context);
88  
89          // Obtain cookie store
90          final CookieStore cookieStore = clientContext.getCookieStore();
91          if (cookieStore == null) {
92              this.log.debug("Cookie store not specified in HTTP context");
93              return;
94          }
95  
96          // Obtain the registry of cookie specs
97          final Lookup<CookieSpecProvider> registry = clientContext.getCookieSpecRegistry();
98          if (registry == null) {
99              this.log.debug("CookieSpec registry not specified in HTTP context");
100             return;
101         }
102 
103         // Obtain the target host, possibly virtual (required)
104         final HttpHost targetHost = clientContext.getTargetHost();
105         if (targetHost == null) {
106             this.log.debug("Target host not set in the context");
107             return;
108         }
109 
110         // Obtain the route (required)
111         final RouteInfo route = clientContext.getHttpRoute();
112         if (route == null) {
113             this.log.debug("Connection route not set in the context");
114             return;
115         }
116 
117         final RequestConfig config = clientContext.getRequestConfig();
118         String policy = config.getCookieSpec();
119         if (policy == null) {
120             policy = CookieSpecs.DEFAULT;
121         }
122         if (this.log.isDebugEnabled()) {
123             this.log.debug("CookieSpec selected: " + policy);
124         }
125 
126         URI requestURI = null;
127         if (request instanceof HttpUriRequest) {
128             requestURI = ((HttpUriRequest) request).getURI();
129         } else {
130             try {
131                 requestURI = new URI(request.getRequestLine().getUri());
132             } catch (final URISyntaxException ignore) {
133             }
134         }
135         final String path = requestURI != null ? requestURI.getPath() : null;
136         final String hostName = targetHost.getHostName();
137         int port = targetHost.getPort();
138         if (port < 0) {
139             port = route.getTargetHost().getPort();
140         }
141 
142         final CookieOrigin cookieOrigin = new CookieOrigin(
143                 hostName,
144                 port >= 0 ? port : 0,
145                 !TextUtils.isEmpty(path) ? path : "/",
146                 route.isSecure());
147 
148         // Get an instance of the selected cookie policy
149         final CookieSpecProvider provider = registry.lookup(policy);
150         if (provider == null) {
151             if (this.log.isDebugEnabled()) {
152                 this.log.debug("Unsupported cookie policy: " + policy);
153             }
154 
155             return;
156         }
157         final CookieSpec cookieSpec = provider.create(clientContext);
158         // Get all cookies available in the HTTP state
159         final List<Cookie> cookies = new ArrayList<Cookie>(cookieStore.getCookies());
160         // Find cookies matching the given origin
161         final List<Cookie> matchedCookies = new ArrayList<Cookie>();
162         final Date now = new Date();
163         for (final Cookie cookie : cookies) {
164             if (!cookie.isExpired(now)) {
165                 if (cookieSpec.match(cookie, cookieOrigin)) {
166                     if (this.log.isDebugEnabled()) {
167                         this.log.debug("Cookie " + cookie + " match " + cookieOrigin);
168                     }
169                     matchedCookies.add(cookie);
170                 }
171             } else {
172                 if (this.log.isDebugEnabled()) {
173                     this.log.debug("Cookie " + cookie + " expired");
174                 }
175             }
176         }
177         // Generate Cookie request headers
178         if (!matchedCookies.isEmpty()) {
179             final List<Header> headers = cookieSpec.formatCookies(matchedCookies);
180             for (final Header header : headers) {
181                 request.addHeader(header);
182             }
183         }
184 
185         final int ver = cookieSpec.getVersion();
186         if (ver > 0) {
187             boolean needVersionHeader = false;
188             for (final Cookie cookie : matchedCookies) {
189                 if (ver != cookie.getVersion() || !(cookie instanceof SetCookie2)) {
190                     needVersionHeader = true;
191                 }
192             }
193 
194             if (needVersionHeader) {
195                 final Header header = cookieSpec.getVersionHeader();
196                 if (header != null) {
197                     // Advertise cookie version support
198                     request.addHeader(header);
199                 }
200             }
201         }
202 
203         // Stick the CookieSpec and CookieOrigin instances to the HTTP context
204         // so they could be obtained by the response interceptor
205         context.setAttribute(HttpClientContext.COOKIE_SPEC, cookieSpec);
206         context.setAttribute(HttpClientContext.COOKIE_ORIGIN, cookieOrigin);
207     }
208 
209 }