Merge httpDate into serverDate as suggested. Removed some unnecessary code and fixed a possible synchronization problem.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4283 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
fuchsi
17 years ago
parent
5aa8d72502
commit
f41172f850
@ -1,141 +0,0 @@
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// httpDate.java
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// ------------------------------
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// part of YaCy
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// (C) by Bjoern 'Fuchs' Krombholz; fox.box@gmail.com
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005, 2006
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//
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// This Class was written by Martin Thelian
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.http;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.Locale;
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import java.util.TimeZone;
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import de.anomic.server.logging.serverLog;
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/**
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* Helper class for parsing HTTP Dates according to RFC 2616 *
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*/
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public final class httpDate {
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public static String PAT_DATE_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";
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public static String PAT_DATE_RFC1036 = "EEEE, dd-MMM-yy HH:mm:ss zzz";
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public static String PAT_DATE_ANSI = "EEE MMM d HH:mm:ss yyyy";
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/**
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* RFC 2616 requires that HTTP clients are able to parse all 3 different
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* formats. All times MUST be in GMT/UTC, but ...
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*/
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public static SimpleDateFormat[] DATE_PARSERS = new SimpleDateFormat[] {
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// RFC 1123/822 (Standard) "Mon, 12 Nov 2007 10:11:12 GMT"
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new SimpleDateFormat(PAT_DATE_RFC1123, Locale.US),
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// RFC 1036/850 (old) "Monday, 12-Nov-07 10:11:12 GMT"
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new SimpleDateFormat(PAT_DATE_RFC1036, Locale.US),
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// ANSI C asctime() "Mon Nov 12 10:11:12 2007"
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new SimpleDateFormat(PAT_DATE_ANSI, Locale.US),
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};
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static {
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// 2-digit dates are automatically parsed by SimpleDateFormat,
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// we need to detect the real year by adding 1900 or 2000 to
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// the year value starting with 1990 (before there was no WWW)
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Calendar c = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
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// 01 Jan 1990 00:00:00
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c.set(1990, 1, 1, 0, 0, 0);
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for (int i = 0; i < DATE_PARSERS.length; i++) {
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SimpleDateFormat f = DATE_PARSERS[i];
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// is this necessary?
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f.setTimeZone(TimeZone.getTimeZone("GMT"));
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f.set2DigitYearStart(c.getTime());
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}
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}
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private httpDate() {};
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/**
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* Parse a HTTP string representation of a date into a Date instance.
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* @param s The date String to parse.
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* @return The Date instance if successful, <code>null</code> otherwise.
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*/
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public static Date parseHTTPDate(String s) {
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try {
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return httpDate.parseHTTPDate(s, true);
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} catch (ParseException e) {
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serverLog.logSevere("HTTPC-header", "DATE ERROR (Parse): " + s);
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return null;
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} catch (java.lang.NumberFormatException e) {
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serverLog.logSevere("HTTPC-header", "DATE ERROR (NumberFormat): " + s);
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return null;
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}
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}
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/**
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* Parse a HTTP string representation of a date into a Date instance.
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* @param s The date String to parse.
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* @param ignoreTimezone parse the timezone? Currently ignored, always parsed.
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* @return The Date instance if successful, <code>null</code> otherwise.
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* @throws ParseException Thrown, when a parsing problem occured (date String had no leagal format)
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* @throws NumberFormatException
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*/
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public static Date parseHTTPDate(String s, boolean /*unused*/ ignoreTimezone) throws ParseException {
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if ((s == null) || (s.length() < 9)) return null;
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s = s.trim();
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//Why was this here?
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//if (s.indexOf("Mrz") > 0) s = s.replaceAll("Mrz", "March");
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ParseException pe = null;
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for(int i = 0; i < DATE_PARSERS.length; i++) {
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try {
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// if parse() throws an Exception we try the next pattern
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return DATE_PARSERS[i].parse(s);
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} catch (ParseException e) {
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// we re-throw the last Exception when parsing was not possible
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pe = e;
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}
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}
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// no match
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throw pe;
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}
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}
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