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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License.
18   *
19   */
20  package org.apache.mina.proxy.handlers.http;
21  
22  import java.net.InetSocketAddress;
23  import java.net.MalformedURLException;
24  import java.net.URL;
25  import java.util.List;
26  import java.util.Map;
27  
28  import org.apache.mina.proxy.ProxyAuthException;
29  import org.apache.mina.proxy.handlers.ProxyRequest;
30  import org.slf4j.Logger;
31  import org.slf4j.LoggerFactory;
32  
33  /**
34   * HttpProxyRequest.java - Wrapper class for HTTP requests.
35   * 
36   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
37   * @since MINA 2.0.0-M3
38   */
39  public class HttpProxyRequest extends ProxyRequest {
40      private final static Logger logger = LoggerFactory.getLogger(HttpProxyRequest.class);
41  
42      /**
43       * The HTTP verb.
44       */
45      private final String httpVerb;
46  
47      /**
48       * The HTTP URI.
49       */
50      private final String httpURI;
51  
52      /**
53       * The HTTP protocol version.
54       */
55      private String httpVersion;
56  
57      /**
58       * The target hostname.
59       */
60      private String host;
61  
62      /**
63       * The request headers.
64       */
65      private Map<String, List<String>> headers;
66  
67      /**
68       * The additionnal properties supplied to use with the proxy for 
69       * authentication for example. 
70       */
71      private transient Map<String, String> properties;
72  
73      /**
74       * Constructor which creates a HTTP/1.0 CONNECT request to the specified 
75       * endpoint.
76       *  
77       * @param endpointAddress the endpoint to connect to
78       */
79      public HttpProxyRequest(final InetSocketAddress endpointAddress) {
80          this(endpointAddress, HttpProxyConstants.HTTP_1_0, null);
81      }
82  
83      /**
84       * Constructor which creates a CONNECT request to the specified endpoint
85       * using the provided protocol version.
86       *  
87       * @param endpointAddress the endpoint to connect to
88       * @param httpVersion the HTTP protocol version
89       */
90      public HttpProxyRequest(final InetSocketAddress endpointAddress, final String httpVersion) {
91          this(endpointAddress, httpVersion, null);
92      }
93  
94      /**
95       * Constructor which creates a CONNECT request to the specified endpoint
96       * using the provided protocol version and setting the requested headers.
97       *  
98       * @param endpointAddress the endpoint to connect to
99       * @param httpVersion the HTTP protocol version
100      * @param headers the additionnal http headers
101      */
102     public HttpProxyRequest(final InetSocketAddress endpointAddress, final String httpVersion,
103             final Map<String, List<String>> headers) {
104         this.httpVerb = HttpProxyConstants.CONNECT;
105         if (!endpointAddress.isUnresolved()) {
106             this.httpURI = endpointAddress.getHostName() + ":" + endpointAddress.getPort();
107         } else {
108             this.httpURI = endpointAddress.getAddress().getHostAddress() + ":" + endpointAddress.getPort();
109         }
110 
111         this.httpVersion = httpVersion;
112         this.headers = headers;
113     }
114 
115     /**
116      * Constructor which creates a HTTP/1.0 GET request to the specified 
117      * http URI.
118      *  
119      * @param httpURI the target URI
120      */
121     public HttpProxyRequest(final String httpURI) {
122         this(HttpProxyConstants.GET, httpURI, HttpProxyConstants.HTTP_1_0, null);
123     }
124 
125     /**
126      * Constructor which creates a GET request to the specified http URI
127      * using the provided protocol version
128      *  
129      * @param httpURI the target URI
130      * @param httpVersion the HTTP protocol version
131      */
132     public HttpProxyRequest(final String httpURI, final String httpVersion) {
133         this(HttpProxyConstants.GET, httpURI, httpVersion, null);
134     }
135 
136     /**
137      * Constructor which creates a request using the provided HTTP verb targeted at
138      * the specified http URI using the provided protocol version.
139      * 
140      * @param httpVerb the HTTP verb to use 
141      * @param httpURI the target URI
142      * @param httpVersion the HTTP protocol version
143      */
144     public HttpProxyRequest(final String httpVerb, final String httpURI, final String httpVersion) {
145         this(httpVerb, httpURI, httpVersion, null);
146     }
147 
148     /**
149      * Constructor which creates a request using the provided HTTP verb targeted at
150      * the specified http URI using the provided protocol version and setting the 
151      * requested headers.
152      * 
153      * @param httpVerb the HTTP verb to use 
154      * @param httpURI the target URI
155      * @param httpVersion the HTTP protocol version
156      * @param headers the additional http headers
157      */
158     public HttpProxyRequest(final String httpVerb, final String httpURI, final String httpVersion,
159             final Map<String, List<String>> headers) {
160         this.httpVerb = httpVerb;
161         this.httpURI = httpURI;
162         this.httpVersion = httpVersion;
163         this.headers = headers;
164     }
165 
166     /**
167      * Returns the HTTP request verb.
168      */
169     public final String getHttpVerb() {
170         return httpVerb;
171     }
172 
173     /**
174      * Returns the HTTP version.
175      */
176     public String getHttpVersion() {
177         return httpVersion;
178     }
179 
180     /**
181      * Sets the HTTP version.
182      * 
183      * @param httpVersion the HTTP protocol version
184      */
185     public void setHttpVersion(String httpVersion) {
186         this.httpVersion = httpVersion;
187     }
188 
189     /**
190      * Returns the host to which we are connecting.
191      */
192     public synchronized final String getHost() {
193         if (host == null) {
194             if (getEndpointAddress() != null && !getEndpointAddress().isUnresolved()) {
195                 host = getEndpointAddress().getHostName();
196             }
197 
198             if (host == null && httpURI != null) {
199                 try {
200                     host = (new URL(httpURI)).getHost();
201                 } catch (MalformedURLException e) {
202                     logger.debug("Malformed URL", e);
203                 }
204             }
205         }
206 
207         return host;
208     }
209 
210     /**
211      * Returns the request HTTP URI.
212      */
213     public final String getHttpURI() {
214         return httpURI;
215     }
216 
217     /**
218      * Returns the HTTP headers.
219      */
220     public final Map<String, List<String>> getHeaders() {
221         return headers;
222     }
223 
224     /**
225      * Set the HTTP headers.
226      */
227     public final void setHeaders(Map<String, List<String>> headers) {
228         this.headers = headers;
229     }
230 
231     /**
232      * Returns additional properties for the request.
233      */
234     public Map<String, String> getProperties() {
235         return properties;
236     }
237 
238     /**
239      * Set additional properties for the request.
240      */
241     public void setProperties(Map<String, String> properties) {
242         this.properties = properties;
243     }
244 
245     /**
246      * Check if the given property(ies) is(are) set. Otherwise throws a 
247      * {@link ProxyAuthException}.
248      */
249     public void checkRequiredProperties(String... propNames) throws ProxyAuthException {
250         StringBuilder sb = new StringBuilder();
251         for (String propertyName : propNames) {
252             if (properties.get(propertyName) == null) {
253                 sb.append(propertyName).append(' ');
254             }
255         }
256         if (sb.length() > 0) {
257             sb.append("property(ies) missing in request");
258             throw new ProxyAuthException(sb.toString());
259         }
260     }
261 
262     /**
263      * Returns the string representation of the HTTP request .
264      */
265     public String toHttpString() {
266         StringBuilder sb = new StringBuilder();
267 
268         sb.append(getHttpVerb()).append(' ').append(getHttpURI()).append(' ').append(getHttpVersion())
269                 .append(HttpProxyConstants.CRLF);
270 
271         boolean hostHeaderFound = false;
272 
273         if (getHeaders() != null) {
274             for (Map.Entry<String, List<String>> header : getHeaders().entrySet()) {
275                 if (!hostHeaderFound) {
276                     hostHeaderFound = header.getKey().equalsIgnoreCase("host");
277                 }
278 
279                 for (String value : header.getValue()) {
280                     sb.append(header.getKey()).append(": ").append(value).append(HttpProxyConstants.CRLF);
281                 }
282             }
283 
284             if (!hostHeaderFound && getHttpVersion() == HttpProxyConstants.HTTP_1_1) {
285                 sb.append("Host: ").append(getHost()).append(HttpProxyConstants.CRLF);
286             }
287         }
288 
289         sb.append(HttpProxyConstants.CRLF);
290 
291         return sb.toString();
292     }
293 }