/*
* Copyright (c) 2008 Los Alamos National Security, LLC.
*
* Los Alamos National Laboratory
* Research Library
* Digital Library Research & Prototyping Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package gov.lanl.util;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
/**
*
* @author Ryan Chute
*
*/
public class HttpDate {
public final static Locale LOCALE_US = Locale.US;
public final static TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT");
public final static String RFC1123_PATTERN = "EEE, dd MMM yyyyy HH:mm:ss z";
public final static SimpleDateFormat rfc1123Format = new SimpleDateFormat(RFC1123_PATTERN, LOCALE_US);
public static String getHttpDate() {
Calendar calendar = new GregorianCalendar(GMT_ZONE, LOCALE_US);
return getHttpDate(calendar, new Date(System.currentTimeMillis()));
}
public static String getHttpDate(Calendar calendar, Date time) {
calendar.setTime(time);
return rfc1123Format.format(calendar.getTime());
}
}