Use response decorator to check if error handled

Closes gh-33980

spring-web/src/main/java/org/springframework/web/client/DefaultResponseErrorHandler.java

@@ -136,18 +136,29 @@ public class DefaultResponseErrorHandler implements ResponseErrorHandler {
 	 */
 	@Override
 	public void handleError(URI url, HttpMethod method, ClientHttpResponse response) throws IOException {
-		handleError(response);
+
+		// For backwards compatibility try handle(response) first
+		HandleErrorResponseDecorator decorator = new HandleErrorResponseDecorator(response);
+		handleError(decorator);
+		if (decorator.isHandled()) {
+			return;
+		}
+
 		handleError(response, response.getStatusCode(), url, method);
 	}
 
-	/**
-	 * {@inheritDoc}
-	 * <p>As of 6.2.1 this method is a no-op unless overridden.
-	 */
 	@SuppressWarnings("removal")
 	@Override
 	public void handleError(ClientHttpResponse response) throws IOException {
-		// no-op, but here for backwards compatibility
+
+		// Called via handleError(url, method, response)
+		if (response instanceof HandleErrorResponseDecorator decorator) {
+			decorator.setNotHandled();
+			return;
+		}
+
+		// Called directly, so do handle
+		handleError(response, response.getStatusCode(), null, null);
 	}
 
 	/**
@@ -277,4 +288,22 @@ public class DefaultResponseErrorHandler implements ResponseErrorHandler {
 		};
 	}
 
+
+	private static class HandleErrorResponseDecorator extends ClientHttpResponseDecorator {
+
+		private boolean handled = true;
+
+		public HandleErrorResponseDecorator(ClientHttpResponse delegate) {
+			super(delegate);
+		}
+
+		public void setNotHandled() {
+			this.handled = false;
+		}
+
+		public boolean isHandled() {
+			return this.handled;
+		}
+	}
+
 }

spring-web/src/main/java/org/springframework/web/client/ResponseErrorHandler.java

@@ -65,7 +65,6 @@ public interface ResponseErrorHandler {
 	 */
 	@Deprecated(since = "6.2.1", forRemoval = true)
 	default void handleError(ClientHttpResponse response) throws IOException {
-		// no-op unless overridden
 	}
 
 }