From b1ef6ece9f4f58c70ed8963c83126727c8408704 Mon Sep 17 00:00:00 2001
From: Juergen Hoeller <jhoeller@pivotal.io>
Date: Mon, 7 Dec 2015 12:47:38 +0100
Subject: [PATCH] AbstractRequestLoggingFilter unwraps request to find
 ContentCachingRequestWrapper

Issue: SPR-13764
---
 .../filter/AbstractRequestLoggingFilter.java  | 29 ++++++++++---------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/spring-web/src/main/java/org/springframework/web/filter/AbstractRequestLoggingFilter.java b/spring-web/src/main/java/org/springframework/web/filter/AbstractRequestLoggingFilter.java
index 1234734175f..0fbdbe855f2 100644
--- a/spring-web/src/main/java/org/springframework/web/filter/AbstractRequestLoggingFilter.java
+++ b/spring-web/src/main/java/org/springframework/web/filter/AbstractRequestLoggingFilter.java
@@ -27,6 +27,7 @@ import javax.servlet.http.HttpSession;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 import org.springframework.web.util.ContentCachingRequestWrapper;
+import org.springframework.web.util.WebUtils;
 
 /**
  * Base class for {@code Filter}s that perform logging operations before and after a request
@@ -270,21 +271,23 @@ public abstract class AbstractRequestLoggingFilter extends OncePerRequestFilter
 				msg.append(";user=").append(user);
 			}
 		}
-		if (isIncludePayload() && request instanceof ContentCachingRequestWrapper) {
-			ContentCachingRequestWrapper wrapper = (ContentCachingRequestWrapper) request;
-			byte[] buf = wrapper.getContentAsByteArray();
-			if (buf.length > 0) {
-				int length = Math.min(buf.length, getMaxPayloadLength());
-				String payload;
-				try {
-					payload = new String(buf, 0, length, wrapper.getCharacterEncoding());
+		if (isIncludePayload()) {
+			ContentCachingRequestWrapper wrapper =
+					WebUtils.getNativeRequest(request, ContentCachingRequestWrapper.class);
+			if (wrapper != null) {
+				byte[] buf = wrapper.getContentAsByteArray();
+				if (buf.length > 0) {
+					int length = Math.min(buf.length, getMaxPayloadLength());
+					String payload;
+					try {
+						payload = new String(buf, 0, length, wrapper.getCharacterEncoding());
+					}
+					catch (UnsupportedEncodingException ex) {
+						payload = "[unknown]";
+					}
+					msg.append(";payload=").append(payload);
 				}
-				catch (UnsupportedEncodingException e) {
-					payload = "[unknown]";
-				}
-				msg.append(";payload=").append(payload);
 			}
-
 		}
 		msg.append(suffix);
 		return msg.toString();