From 406d72ea371b95e30be68a511b9c516b67d34fd3 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Thu, 1 Nov 2018 13:03:27 +0300
Subject: RFC1123 http date formatter (2DIGIT day-of-month)

---
 .../src/main/java/com/juick/util/DateFormatter.java       |  7 ++++---
 .../main/java/com/juick/util/DateFormattersHolder.java    | 15 +++++++++++++++
 juick-common/src/test/java/com/juick/FormatterTest.java   |  1 +
 3 files changed, 20 insertions(+), 3 deletions(-)

(limited to 'juick-common')

diff --git a/juick-common/src/main/java/com/juick/util/DateFormatter.java b/juick-common/src/main/java/com/juick/util/DateFormatter.java
index f9e23a91..8f569562 100644
--- a/juick-common/src/main/java/com/juick/util/DateFormatter.java
+++ b/juick-common/src/main/java/com/juick/util/DateFormatter.java
@@ -22,6 +22,7 @@ import org.apache.commons.lang3.StringUtils;
 import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.Locale;
 
@@ -39,7 +40,7 @@ public class DateFormatter {
         if (ts == null)
             return null;
 
-        LocalDateTime ldt = LocalDateTime.ofInstant(ts, ZoneOffset.UTC);
+        ZonedDateTime ldt = ZonedDateTime.ofInstant(ts, ZoneOffset.UTC);
 
         return ldt.format(formatter);
     }
@@ -49,8 +50,8 @@ public class DateFormatter {
         if (StringUtils.isBlank(v))
             return null;
 
-        LocalDateTime ldt = LocalDateTime.parse(v, formatter);
+        ZonedDateTime ldt = ZonedDateTime.parse(v, formatter);
 
-        return ldt.toInstant(ZoneOffset.UTC);
+        return ldt.toInstant();
     }
 }
diff --git a/juick-common/src/main/java/com/juick/util/DateFormattersHolder.java b/juick-common/src/main/java/com/juick/util/DateFormattersHolder.java
index 09fd17d7..8292e68e 100644
--- a/juick-common/src/main/java/com/juick/util/DateFormattersHolder.java
+++ b/juick-common/src/main/java/com/juick/util/DateFormattersHolder.java
@@ -57,4 +57,19 @@ public class DateFormattersHolder {
         }
         return localInstance;
     }
+
+    private static volatile DateFormatter httpDateFormatter;
+
+    public static DateFormatter getHttpDateFormatter() {
+        DateFormatter localInstance = httpDateFormatter;
+        if (localInstance == null) {
+            synchronized (DateFormatter.class) {
+                localInstance = httpDateFormatter;
+                if (localInstance == null) {
+                    httpDateFormatter = localInstance = new DateFormatter("EEE, dd MMM yyyy HH:mm:ss O");
+                }
+            }
+        }
+        return localInstance;
+    }
 }
diff --git a/juick-common/src/test/java/com/juick/FormatterTest.java b/juick-common/src/test/java/com/juick/FormatterTest.java
index 397c4b6c..da9f5d26 100644
--- a/juick-common/src/test/java/com/juick/FormatterTest.java
+++ b/juick-common/src/test/java/com/juick/FormatterTest.java
@@ -59,5 +59,6 @@ public class FormatterTest {
 
         assertThat(DateFormattersHolder.getMessageFormatterInstance().format(date.toInstant()), equalTo("2012-01-01 00:00:00"));
         assertThat(DateFormattersHolder.getRssFormatterInstance().format(date.toInstant()), equalTo("Sun, 1 Jan 2012 00:00:00"));
+        assertThat(DateFormattersHolder.getHttpDateFormatter().format(date.toInstant()), equalTo("Sun, 01 Jan 2012 00:00:00 GMT"));
     }
 }
-- 
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