From 417f3b92ba4549b2f22340e3107d869d2b9c5bb8 Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Tue, 21 Oct 2008 07:00:00 -0700
Subject: Initial Contribution

---
 .../apache/http/protocol/HttpDateGenerator.java    | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/org/apache/http/protocol/HttpDateGenerator.java

(limited to 'src/org/apache/http/protocol/HttpDateGenerator.java')

diff --git a/src/org/apache/http/protocol/HttpDateGenerator.java b/src/org/apache/http/protocol/HttpDateGenerator.java
new file mode 100644
index 0000000..bfb0863
--- /dev/null
+++ b/src/org/apache/http/protocol/HttpDateGenerator.java
@@ -0,0 +1,81 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/HttpDateGenerator.java $
+ * $Revision: 548066 $
+ * $Date: 2007-06-17 09:51:55 -0700 (Sun, 17 Jun 2007) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.protocol;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.TimeZone;
+
+
+/**
+ * Generates a date in the format required by the HTTP protocol.
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 548066 $
+ * 
+ * @since 4.0
+ */
+public class HttpDateGenerator {
+
+    /** Date format pattern used to generate the header in RFC 1123 format. */
+    public static final
+        String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";
+
+    /** The time zone to use in the date header. */
+    public static final TimeZone GMT = TimeZone.getTimeZone("GMT");
+
+
+    private final DateFormat dateformat;
+    
+    private long dateAsLong = 0L;
+    private String dateAsText = null;
+
+    public HttpDateGenerator() {
+        super();
+        this.dateformat = new SimpleDateFormat(PATTERN_RFC1123, Locale.US);
+        this.dateformat.setTimeZone(GMT);
+    }
+    
+    public synchronized String getCurrentDate() {
+        long now = System.currentTimeMillis();
+        if (now - this.dateAsLong > 1000) {
+            // Generate new date string
+            this.dateAsText = this.dateformat.format(new Date(now));
+            this.dateAsLong = now;
+        }
+        return this.dateAsText;
+    }
+    
+}
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