Home | History | Annotate | Download | only in protocol 
      1 /*
      2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/HttpDateGenerator.java $
      3  * $Revision: 548066 $
      4  * $Date: 2007-06-17 09:51:55 -0700 (Sun, 17 Jun 2007) $
      5  *
      6  * ====================================================================
      7  * Licensed to the Apache Software Foundation (ASF) under one
      8  * or more contributor license agreements.  See the NOTICE file
      9  * distributed with this work for additional information
     10  * regarding copyright ownership.  The ASF licenses this file
     11  * to you under the Apache License, Version 2.0 (the
     12  * "License"); you may not use this file except in compliance
     13  * with the License.  You may obtain a copy of the License at
     14  *
     15  *   http://www.apache.org/licenses/LICENSE-2.0
     16  *
     17  * Unless required by applicable law or agreed to in writing,
     18  * software distributed under the License is distributed on an
     19  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     20  * KIND, either express or implied.  See the License for the
     21  * specific language governing permissions and limitations
     22  * under the License.
     23  * ====================================================================
     24  *
     25  * This software consists of voluntary contributions made by many
     26  * individuals on behalf of the Apache Software Foundation.  For more
     27  * information on the Apache Software Foundation, please see
     28  * <http://www.apache.org/>.
     29  *
     30  */
     31 
     32 package org.apache.http.protocol;
     33 
     34 import java.text.DateFormat;
     35 import java.text.SimpleDateFormat;
     36 import java.util.Date;
     37 import java.util.Locale;
     38 import java.util.TimeZone;
     39 
     40 
     41 /**
     42  * Generates a date in the format required by the HTTP protocol.
     43  *
     44  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
     45  *
     46  * @version $Revision: 548066 $
     47  *
     48  * @since 4.0
     49  *
     50  * @deprecated Please use {@link java.net.URL#openConnection} instead.
     51  *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
     52  *     for further details.
     53  */
     54 @Deprecated
     55 public class HttpDateGenerator {
     56 
     57     /** Date format pattern used to generate the header in RFC 1123 format. */
     58     public static final
     59         String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";
     60 
     61     /** The time zone to use in the date header. */
     62     public static final TimeZone GMT = TimeZone.getTimeZone("GMT");
     63 
     64 
     65     private final DateFormat dateformat;
     66 
     67     private long dateAsLong = 0L;
     68     private String dateAsText = null;
     69 
     70     public HttpDateGenerator() {
     71         super();
     72         this.dateformat = new SimpleDateFormat(PATTERN_RFC1123, Locale.US);
     73         this.dateformat.setTimeZone(GMT);
     74     }
     75 
     76     public synchronized String getCurrentDate() {
     77         long now = System.currentTimeMillis();
     78         if (now - this.dateAsLong > 1000) {
     79             // Generate new date string
     80             this.dateAsText = this.dateformat.format(new Date(now));
     81             this.dateAsLong = now;
     82         }
     83         return this.dateAsText;
     84     }
     85 
     86 }
     87