1 /*
2 * $Header: /u/cvs/Projects/EnhydraOrg/enhydra3x/Enhydra/modules/Tomcat/src/share/org/apache/tomcat/util/Attic/HttpDate.java,v 1.2 2000/02/26 02:32:27 shawn Exp $
3 * $Revision: 1.2 $
4 * $Date: 2000/02/26 02:32:27 $
5 *
6 * ====================================================================
7 *
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 1999 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution, if
26 * any, must include the following acknowlegement:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowlegement may appear in the software itself,
30 * if and wherever such third-party acknowlegements normally appear.
31 *
32 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
33 * Foundation" must not be used to endorse or promote products derived
34 * from this software without prior written permission. For written
35 * permission, please contact apache@apache.org.
36 *
37 * 5. Products derived from this software may not be called "Apache"
38 * nor may "Apache" appear in their names without prior written
39 * permission of the Apache Group.
40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 *
60 * [Additional notices, if required by prior licensing conditions]
61 *
62 */
63
64
65 package org.apache.tomcat.util;
66
67 import java.io.IOException;
68 import java.io.OutputStream;
69 import java.util;
70 import java.text;
71
72 /**
73 * This class can be used to efficiently parse and write an RFC 1123
74 * formatted date in an HTTP message header. Also supports reading the
75 * RFC 1036 format and ANSI C's asctime() format, as suggested by HTTP/1.0
76 * and mandated by HTTP/1.1.
77 *
78 * @author dac@eng.sun.com
79 * @author Jason Hunter [jch@eng.sun.com]
80 * @author James Todd [gonzo@eng.sun.com]
81 */
82
83 public class HttpDate extends Ascii {
84
85 private StringManager sm =
86 StringManager.getManager(Constants.Package);
87
88 // ONLY FOR COMPAT -- KILL ASAP -- just make sure that dependant
89 // classes know what's up. ref. MimeHeaderField
90 private static final String DATESTR = "Sun, 06 Nov 1994 08:49:37 GMT";
91 public static final int DATELEN = DATESTR.length();
92 // END COMPAT -- DON'T FORGET TO KILL
93
94 // we force our locale here as all http dates are in english
95 private final static Locale loc = Locale.US;
96
97 // all http dates are expressed as time at GMT
98 private final static TimeZone zone = TimeZone.getTimeZone("GMT");
99
100 // format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT"
101 private final static String rfc1123Pattern =
102 "EEE, dd MMM yyyyy HH:mm:ss z";
103
104 // format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT"
105 private final static String rfc1036Pattern =
106 "EEEEEEEEE, dd-MMM-yy HH:mm:ss z";
107
108 // format for C asctime() date string -- "Sun Nov 6 08:49:37 1994"
109 private final static String asctimePattern =
110 "EEE MMM d HH:mm:ss yyyyy";
111
112 private final static SimpleDateFormat rfc1123Format =
113 new SimpleDateFormat(rfc1123Pattern, loc);
114
115 private final static SimpleDateFormat rfc1036Format =
116 new SimpleDateFormat(rfc1036Pattern, loc);
117
118 private final static SimpleDateFormat asctimeFormat =
119 new SimpleDateFormat(asctimePattern, loc);
120
121 static {
122 rfc1123Format.setTimeZone(zone);
123 rfc1036Format.setTimeZone(zone);
124 asctimeFormat.setTimeZone(zone);
125 }
126
127 // protected so that oldcookieexpiry in cookieutils can use
128 // yes, this is sloppy as crap and could stand to be done better.
129 protected Calendar calendar = new GregorianCalendar(zone, loc);
130
131 public HttpDate() {
132 calendar.setTime(new Date(System.currentTimeMillis()));
133 }
134
135 public HttpDate(long ms) {
136 calendar.setTime(new Date(ms));
137 }
138
139 public void setTime() {
140 calendar.setTime(new Date(System.currentTimeMillis()));
141 }
142
143 public void setTime(long ms) {
144 calendar.setTime(new Date(ms));
145 }
146
147 public void parse(String dateString) {
148 try {
149 Date date = rfc1123Format.parse(dateString);
150 calendar.setTime(date);
151 return;
152 } catch (ParseException e) { }
153
154 try {
155 Date date = rfc1036Format.parse(dateString);
156 calendar.setTime(date);
157 return;
158 } catch (ParseException e) { }
159
160 try {
161 Date date = asctimeFormat.parse(dateString);
162 calendar.setTime(date);
163 return;
164 } catch (ParseException pe) {
165 String msg = sm.getString("httpDate.pe", dateString);
166
167 throw new IllegalArgumentException(msg);
168 }
169 }
170
171 public void parse(byte[] b, int off, int len) {
172 // ok -- so this is pretty stoopid, but the old version of this
173 // source took this arg set, so we will too for now (backwards compat)
174 String dateString = new String(b, off, len);
175 parse(dateString);
176 }
177
178 public void write(OutputStream out) throws IOException {
179 String dateString = rfc1123Format.format(calendar.getTime());
180 byte[] b = dateString.getBytes();
181 out.write(b);
182 }
183
184 public String toString() {
185 return rfc1123Format.format(calendar.getTime());
186 }
187
188 public long getTime() {
189 return calendar.getTime().getTime();
190 }
191
192 public static long getCurrentTime() {
193 return System.currentTimeMillis();
194 }
195
196 // KILL, THIS IS ONLY HERE FOR TEMP COMPAT as MimeHeaderField uses it.
197 public int getBytes(byte[] buf, int off, int len) {
198 if (len < DATELEN) {
199 String msg = sm.getString("httpDate.iae", new Integer(len));
200
201 throw new IllegalArgumentException(msg);
202 }
203
204 String dateString = rfc1123Format.format(calendar.getTime());
205 byte[] b = dateString.getBytes();
206 System.arraycopy(b, 0, buf, off, DATELEN);
207 return DATELEN;
208 }
209 }