Source code: org/apache/http/protocol/ResponseDate.java
1 /*
2 * $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpcore/tags/4.0-alpha2/src/java/org/apache/http/protocol/ResponseDate.java $
3 * $Revision: 408172 $
4 * $Date: 2006-05-21 16:06:29 +0200 (Sun, 21 May 2006) $
5 *
6 * ====================================================================
7 *
8 * Copyright 1999-2006 The Apache Software Foundation
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 * ====================================================================
22 *
23 * This software consists of voluntary contributions made by many
24 * individuals on behalf of the Apache Software Foundation. For more
25 * information on the Apache Software Foundation, please see
26 * <http://www.apache.org/>.
27 *
28 */
29
30 package org.apache.http.protocol;
31
32 import java.io.IOException;
33
34 import org.apache.http.HttpException;
35 import org.apache.http.HttpResponse;
36 import org.apache.http.HttpResponseInterceptor;
37 import org.apache.http.HttpStatus;
38
39 /**
40 * A response interceptor that adds a Date header.
41 * For use on the server side.
42 *
43 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
44 *
45 * @version $Revision: 408172 $
46 *
47 * @since 4.0
48 */
49 public class ResponseDate implements HttpResponseInterceptor {
50
51 private static final HttpDateGenerator DATE_GENERATOR = new HttpDateGenerator();
52
53 public ResponseDate() {
54 super();
55 }
56
57 public void process(final HttpResponse response, final HttpContext context)
58 throws HttpException, IOException {
59 if (response == null) {
60 throw new IllegalArgumentException("HTTP request may not be null");
61 }
62 int status = response.getStatusLine().getStatusCode();
63 if (status >= HttpStatus.SC_OK) {
64 String httpdate = DATE_GENERATOR.getCurrentDate();
65 response.setHeader(new GeneratedHeader(HTTP.DATE_DIRECTIVE, httpdate));
66 }
67 }
68
69 }