From 80df21b22b425b0da19f29053c6b7b6997b9014b Mon Sep 17 00:00:00 2001
From: nco <nernotte@gmail.com>
Date: Fri, 14 Jul 2017 12:25:37 +0200
Subject: [PATCH] Fix JSONEncoder for non-printable characters

formatter accumulates internally what is being formatted.
This quickly lead to OutOfMemoryException when encoding String with lots of non-printable characters
---
 .../java/com/sun/jersey/json/impl/writer/JsonEncoder.java    | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/jersey-json/src/main/java/com/sun/jersey/json/impl/writer/JsonEncoder.java b/jersey-json/src/main/java/com/sun/jersey/json/impl/writer/JsonEncoder.java
index 91f5bc3eb..3b0d1570e 100644
--- a/jersey-json/src/main/java/com/sun/jersey/json/impl/writer/JsonEncoder.java
+++ b/jersey-json/src/main/java/com/sun/jersey/json/impl/writer/JsonEncoder.java
@@ -51,8 +51,8 @@ public static String encode(String text) {
         if ((null == text) || (text.length() == 0)) {
             return text;
         }
-        Formatter formatter = new java.util.Formatter();
         StringBuffer result = new StringBuffer();
+        Formatter formatter = new java.util.Formatter(result);
         for (int i = 0; i < text.length(); i++) {
             char c = text.charAt(i);
             switch (c) {
@@ -79,12 +79,13 @@ public static String encode(String text) {
                     break;
                 default:
                     if (c < ' ') { // TODO: what about c > 255 ???
-                        result.append(formatter.format("\\u%04X", (int)c));
+                        formatter.format("\\u%04X", (int)c);
                     } else {
                         result.append(c);
                     }
             }
         }
+        formatter.close();
         return result.toString();
     }
 }