Polishing contribution

Closes gh-27722

Author: rstoyanchev

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompDecoder.java

@@ -143,7 +143,7 @@ private Message<byte[]> decodeMessage(ByteBuffer byteBuffer, @Nullable MultiValu
 				StompCommand stompCommand = StompCommand.valueOf(command);
 				headerAccessor = StompHeaderAccessor.create(stompCommand);
 				initHeaders(headerAccessor);
-				readHeaders(stompCommand, byteBuffer, headerAccessor);
+				readHeaders(byteBuffer, headerAccessor, stompCommand);
 				payload = readPayload(byteBuffer, headerAccessor);
 			}
 			if (payload != null) {
@@ -215,9 +215,12 @@ private String readCommand(ByteBuffer byteBuffer) {
 		return StreamUtils.copyToString(command, StandardCharsets.UTF_8);
 	}
 
-	private void readHeaders(StompCommand stompCommand, ByteBuffer byteBuffer, StompHeaderAccessor headerAccessor) {
-		boolean shouldUnescape = (stompCommand != StompCommand.CONNECT && stompCommand != StompCommand.STOMP
-				&& stompCommand != StompCommand.CONNECTED);
+	private void readHeaders(ByteBuffer byteBuffer, StompHeaderAccessor headerAccessor, StompCommand command) {
+
+		boolean shouldUnescape = (command != StompCommand.CONNECT &&
+				command != StompCommand.CONNECTED &&
+				command != StompCommand.STOMP);
+
 		while (true) {
 			ByteArrayOutputStream headerStream = new ByteArrayOutputStream(256);
 			boolean headerComplete = false;

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/StompDecoderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -159,7 +159,7 @@ public void decodeFrameWithEscapedHeaders() {
 		assertThat(headers.getFirstNativeHeader("a:\r\n\\b")).isEqualTo("alpha:bravo\r\n\\");
 	}
 
-	@Test
+	@Test // gh-27722
 	public void decodeFrameWithHeaderWithBackslashValue() {
 		String accept = "accept-version:1.1\n";
 		String keyAndValueWithBackslash = "key:\\value\n";