fix bz #69316 with test case.
check whether cached date and current date are in same second.
diff --git a/java/org/apache/tomcat/util/http/FastHttpDateFormat.java b/java/org/apache/tomcat/util/http/FastHttpDateFormat.java
index f48913b..80e6e57 100644
--- a/java/org/apache/tomcat/util/http/FastHttpDateFormat.java
+++ b/java/org/apache/tomcat/util/http/FastHttpDateFormat.java
@@ -64,7 +64,7 @@
/**
* Instant on which the currentDate object was generated.
*/
- private static volatile long currentDateGenerated = 0L;
+ private static volatile long currentDateGeneratedInSeconds = 0L;
/**
@@ -94,11 +94,11 @@
* @return the HTTP date
*/
public static String getCurrentDate() {
- long now = System.currentTimeMillis();
- // Handle case where time moves backwards (e.g. system time corrected)
- if (Math.abs(now - currentDateGenerated) > 1000) {
- currentDate = FORMAT_RFC5322.format(new Date(now));
- currentDateGenerated = now;
+ // according rfc5322, date/time data is accurate to the second.
+ long nowInSeconds = System.currentTimeMillis() / 1000L;
+ if (nowInSeconds != currentDateGeneratedInSeconds) {
+ currentDate = FORMAT_RFC5322.format(new Date(nowInSeconds * 1000L));
+ currentDateGeneratedInSeconds = nowInSeconds;
}
return currentDate;
}
diff --git a/test/org/apache/tomcat/util/http/TestFastHttpDateFormat.java b/test/org/apache/tomcat/util/http/TestFastHttpDateFormat.java
new file mode 100644
index 0000000..fca12e2
--- /dev/null
+++ b/test/org/apache/tomcat/util/http/TestFastHttpDateFormat.java
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+package org.apache.tomcat.util.http;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestFastHttpDateFormat {
+
+ @Test
+ public void testGetCurrentDateInSameSecond() {
+ long now = System.currentTimeMillis();
+ try {
+ Thread.sleep(1000L - now % 1000);
+ } catch (InterruptedException e) {
+ // Ignore
+ }
+ now = System.currentTimeMillis();
+ String s1 = FastHttpDateFormat.getCurrentDate();
+ long lastMillisInSameSecond = now - now % 1000 + 900L;
+ try {
+ Thread.sleep(lastMillisInSameSecond - now);
+ } catch (InterruptedException e) {
+ // Ignore
+ }
+ String s2 = FastHttpDateFormat.getCurrentDate();
+ Assert.assertEquals("Two same RFC5322 format dates are expected.", s1, s2);
+ }
+
+ @Test
+ public void testGetCurrentDateNextToAnotherSecond() {
+ long now = System.currentTimeMillis();
+
+ try {
+ Thread.sleep(2000L - now % 1000 + 500L);
+ } catch (InterruptedException e) {
+ // Ignore
+ }
+ now = System.currentTimeMillis();
+ String s1 = FastHttpDateFormat.getCurrentDate();
+ long firstMillisOfNextSecond = now - now % 1000 + 1100L;
+ try {
+ Thread.sleep(firstMillisOfNextSecond - now);
+ } catch (InterruptedException e) {
+ // Ignore
+ }
+
+ String s2 = FastHttpDateFormat.getCurrentDate();
+ Assert.assertFalse("Two different RFC5322 format dates are expected.", s1.equals(s2));
+ }
+}
