001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/util/DateTool.java,v 1.2 2001/07/22 20:25:13 pier Exp $
003: * $Revision: 1.2 $
004: * $Date: 2001/07/22 20:25:13 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.catalina.util;
065:
066: import java.io.IOException;
067: import java.io.OutputStream;
068: import java.util.*;
069: import java.text.*;
070:
071: /**
072: * Common place for date utils.
073: *
074: * @author dac@eng.sun.com
075: * @author Jason Hunter [jch@eng.sun.com]
076: * @author James Todd [gonzo@eng.sun.com]
077: * @author Costin Manolache
078: */
079: public class DateTool {
080:
081: private static StringManager sm = StringManager
082: .getManager("org.apache.catalina.util");
083:
084: /** US locale - all HTTP dates are in english
085: */
086: public final static Locale LOCALE_US = Locale.US;
087:
088: /** GMT timezone - all HTTP dates are on GMT
089: */
090: public final static TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT");
091:
092: /** format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT"
093: */
094: public final static String RFC1123_PATTERN = "EEE, dd MMM yyyyy HH:mm:ss z";
095:
096: // format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT"
097: private final static String rfc1036Pattern = "EEEEEEEEE, dd-MMM-yy HH:mm:ss z";
098:
099: // format for C asctime() date string -- "Sun Nov 6 08:49:37 1994"
100: private final static String asctimePattern = "EEE MMM d HH:mm:ss yyyyy";
101:
102: /** Pattern used for old cookies
103: */
104: public final static String OLD_COOKIE_PATTERN = "EEE, dd-MMM-yyyy HH:mm:ss z";
105:
106: /** DateFormat to be used to format dates
107: */
108: public final static DateFormat rfc1123Format = new SimpleDateFormat(
109: RFC1123_PATTERN, LOCALE_US);
110:
111: /** DateFormat to be used to format old netscape cookies
112: */
113: public final static DateFormat oldCookieFormat = new SimpleDateFormat(
114: OLD_COOKIE_PATTERN, LOCALE_US);
115:
116: public final static DateFormat rfc1036Format = new SimpleDateFormat(
117: rfc1036Pattern, LOCALE_US);
118:
119: public final static DateFormat asctimeFormat = new SimpleDateFormat(
120: asctimePattern, LOCALE_US);
121:
122: static {
123: rfc1123Format.setTimeZone(GMT_ZONE);
124: oldCookieFormat.setTimeZone(GMT_ZONE);
125: rfc1036Format.setTimeZone(GMT_ZONE);
126: asctimeFormat.setTimeZone(GMT_ZONE);
127: }
128:
129: }
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