From 23162bb3060bc4166bbed8f2452e9abe44a3b3ca Mon Sep 17 00:00:00 2001
From: rstoyanchev <rstoyanchev@vmware.com>
Date: Fri, 29 Sep 2023 17:15:23 +0100
Subject: [PATCH] Undo optimization from 12fe2c that can cause regression

Closes gh-31327
---
 .../http/converter/StringHttpMessageConverter.java          | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/spring-web/src/main/java/org/springframework/http/converter/StringHttpMessageConverter.java b/spring-web/src/main/java/org/springframework/http/converter/StringHttpMessageConverter.java
index 5a408d874976..8b8793e277eb 100644
--- a/spring-web/src/main/java/org/springframework/http/converter/StringHttpMessageConverter.java
+++ b/spring-web/src/main/java/org/springframework/http/converter/StringHttpMessageConverter.java
@@ -93,11 +93,7 @@ public boolean supports(Class<?> clazz) {
 	@Override
 	protected String readInternal(Class<? extends String> clazz, HttpInputMessage inputMessage) throws IOException {
 		Charset charset = getContentTypeCharset(inputMessage.getHeaders().getContentType());
-		long length = inputMessage.getHeaders().getContentLength();
-		byte[] bytes = (length >= 0 && length <= Integer.MAX_VALUE ?
-				inputMessage.getBody().readNBytes((int) length) :
-				inputMessage.getBody().readAllBytes());
-		return new String(bytes, charset);
+		return StreamUtils.copyToString(inputMessage.getBody(), charset);
 	}
 
 	@Override