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The source code/* * Copyright 1999-2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.tomcat.util.buf; import java.text.DateFormat; import java.text.FieldPosition; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.TimeZone; import org.apache.tomcat.util.res.StringManager; /** * Common place for date utils. * * @deprecated Will be replaced with a more efficient impl, based on * FastDateFormat, with an API using less objects. * @author dac@eng.sun.com * @author Jason Hunter [jch@eng.sun.com] * @author James Todd [gonzo@eng.sun.com] * @author Costin Manolache */ public class DateTool { /** US locale - all HTTP dates are in english */ private final static Locale LOCALE_US = Locale.US; /** GMT timezone - all HTTP dates are on GMT */ public final static TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT"); /** format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT" */ public final static String RFC1123_PATTERN = "EEE, dd MMM yyyy HH:mm:ss z"; // format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT" public final static String rfc1036Pattern = "EEEEEEEEE, dd-MMM-yy HH:mm:ss z"; // format for C asctime() date string -- "Sun Nov 6 08:49:37 1994" public final static String asctimePattern = "EEE MMM d HH:mm:ss yyyy"; /** Pattern used for old cookies */ private final static String OLD_COOKIE_PATTERN = "EEE, dd-MMM-yyyy HH:mm:ss z"; /** DateFormat to be used to format dates. Called from MessageBytes */ private final static DateFormat rfc1123Format = new SimpleDateFormat(RFC1123_PATTERN, LOCALE_US); /** DateFormat to be used to format old netscape cookies Called from ServerCookie */ private final static DateFormat oldCookieFormat = new SimpleDateFormat(OLD_COOKIE_PATTERN, LOCALE_US); private final static DateFormat rfc1036Format = new SimpleDateFormat(rfc1036Pattern, LOCALE_US); private final static DateFormat asctimeFormat = new SimpleDateFormat(asctimePattern, LOCALE_US); static { rfc1123Format.setTimeZone(GMT_ZONE); oldCookieFormat.setTimeZone(GMT_ZONE); rfc1036Format.setTimeZone(GMT_ZONE); asctimeFormat.setTimeZone(GMT_ZONE); } private static String rfc1123DS; private static long rfc1123Sec; private static StringManager sm = StringManager.getManager("org.apache.tomcat.util.buf.res"); // Called from MessageBytes.getTime() static long parseDate( MessageBytes value ) { return parseDate( value.toString()); } // Called from MessageBytes.setTime /** */ public static String format1123( Date d ) { String dstr=null; synchronized(rfc1123Format) { dstr = format1123(d, rfc1123Format); } return dstr; } public static String format1123( Date d,DateFormat df ) { long dt = d.getTime() / 1000; if ((rfc1123DS != null) && (dt == rfc1123Sec)) return rfc1123DS; rfc1123DS = df.format( d ); rfc1123Sec = dt; return rfc1123DS; } // Called from ServerCookie /** */ public static void formatOldCookie( Date d, StringBuffer sb, FieldPosition fp ) { synchronized(oldCookieFormat) { oldCookieFormat.format( d, sb, fp ); } } // Called from ServerCookie public static String formatOldCookie( Date d ) { String ocf=null; synchronized(oldCookieFormat) { ocf= oldCookieFormat.format( d ); } return ocf; } /** Called from HttpServletRequest.getDateHeader(). Not efficient - but not very used. */ public static long parseDate( String dateString ) { DateFormat [] format = {rfc1123Format,rfc1036Format,asctimeFormat}; return parseDate(dateString,format); } public static long parseDate( String dateString, DateFormat []format ) { Date date=null; for(int i=0; i < format.length; i++) { try { date = format[i].parse(dateString); return date.getTime(); } catch (ParseException e) { } catch (StringIndexOutOfBoundsException e) { } } String msg = sm.getString("httpDate.pe", dateString); throw new IllegalArgumentException(msg); } } |
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