Consistent use of getLocalAddr() without DNS lookups in request adapters

Closes spring-projectsgh-28280

Author: jhoeller

spring-web/src/main/java/org/springframework/http/server/ServletServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -181,7 +181,7 @@ public Principal getPrincipal() {
 
 	@Override
 	public InetSocketAddress getLocalAddress() {
-		return new InetSocketAddress(this.servletRequest.getLocalName(), this.servletRequest.getLocalPort());
+		return new InetSocketAddress(this.servletRequest.getLocalAddr(), this.servletRequest.getLocalPort());
 	}
 
 	@Override
@@ -202,7 +202,7 @@ public InputStream getBody() throws IOException {
 	@Override
 	public ServerHttpAsyncRequestControl getAsyncRequestControl(ServerHttpResponse response) {
 		if (this.asyncRequestControl == null) {
-			if (!ServletServerHttpResponse.class.isInstance(response)) {
+			if (!(response instanceof ServletServerHttpResponse)) {
 				throw new IllegalArgumentException(
 						"Response must be a ServletServerHttpResponse: " + response.getClass());
 			}