From c9489606d5ae6ff3af6eac9f407260b3e1f4dca0 Mon Sep 17 00:00:00 2001
From: Oleg Kalnichevski <olegk@apache.org>
Date: Thu, 5 Nov 2020 15:09:31 +0100
Subject: [PATCH] HTTPCLIENT-2126: `AsyncCachingExec` throws NPE when response
 body is null

---
 .../apache/hc/client5/http/impl/cache/AsyncCachingExec.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/AsyncCachingExec.java b/httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/AsyncCachingExec.java
index c6db03c5d..2ccae5730 100644
--- a/httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/AsyncCachingExec.java
+++ b/httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/AsyncCachingExec.java
@@ -157,7 +157,9 @@ class AsyncCachingExec extends CachingExecBase implements AsyncExecChainHandler
                     cacheResponse,
                     content != null ? new BasicEntityDetails(content.length, contentType) : null);
             if (dataConsumer != null) {
-                dataConsumer.consume(ByteBuffer.wrap(content));
+                if (content != null) {
+                    dataConsumer.consume(ByteBuffer.wrap(content));
+                }
                 dataConsumer.streamEnd(null);
             }
             asyncExecCallback.completed();