DefaultResponseErrorHandler shows full error details

Closes gh-27552

spring-core/src/main/java/org/springframework/core/log/LogFormatUtils.java

@@ -60,16 +60,11 @@ public abstract class LogFormatUtils {
 			return "";
 		}
 		String result;
-		if (value instanceof CharSequence) {
-			result = "\"" + value + "\"";
+		try {
+			result = value.toString();
 		}
-		else {
-			try {
-				result = value.toString();
-			}
-			catch (Throwable ex) {
-				result = ex.toString();
-			}
+		catch (Throwable ex) {
+			result = ex.toString();
 		}
 		if (maxLength != -1) {
 			result = (result.length() > maxLength ? result.substring(0, maxLength) + " (truncated)..." : result);
@@ -77,6 +72,9 @@ public abstract class LogFormatUtils {
 		if (replaceNewlines) {
 			result = result.replace("\n", "<LF>").replace("\r", "<CR>");
 		}
+		if (value instanceof CharSequence) {
+			result = "\"" + result + "\"";
+		}
 		return result;
 	}
 

spring-web/src/main/java/org/springframework/web/client/DefaultResponseErrorHandler.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.
@@ -16,14 +16,11 @@
 
 package org.springframework.web.client;
 
-import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.Reader;
-import java.nio.CharBuffer;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 
+import org.springframework.core.log.LogFormatUtils;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
@@ -135,29 +132,17 @@ public class DefaultResponseErrorHandler implements ResponseErrorHandler {
 			int rawStatusCode, String statusText, @Nullable byte[] responseBody, @Nullable Charset charset) {
 
 		String preface = rawStatusCode + " " + statusText + ": ";
+
 		if (ObjectUtils.isEmpty(responseBody)) {
 			return preface + "[no body]";
 		}
 
-		charset = charset == null ? StandardCharsets.UTF_8 : charset;
-		int maxChars = 200;
+		charset = (charset != null ? charset : StandardCharsets.UTF_8);
 
-		if (responseBody.length < maxChars * 2) {
-			return preface + "[" + new String(responseBody, charset) + "]";
-		}
+		String bodyText = new String(responseBody, charset);
+		bodyText = LogFormatUtils.formatValue(bodyText, -1, true);
 
-		try {
-			Reader reader = new InputStreamReader(new ByteArrayInputStream(responseBody), charset);
-			CharBuffer buffer = CharBuffer.allocate(maxChars);
-			reader.read(buffer);
-			reader.close();
-			buffer.flip();
-			return preface + "[" + buffer.toString() + "... (" + responseBody.length + " bytes)]";
-		}
-		catch (IOException ex) {
-			// should never happen
-			throw new IllegalStateException(ex);
-		}
+		return preface + bodyText;
 	}
 
 	/**

spring-web/src/test/java/org/springframework/web/client/DefaultResponseErrorHandlerTests.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.
@@ -19,10 +19,8 @@ package org.springframework.web.client;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
-import java.util.function.Function;
 
 import org.junit.jupiter.api.Test;
-import reactor.core.publisher.Flux;
 
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
@@ -75,25 +73,7 @@ public class DefaultResponseErrorHandlerTests {
 		assertThatExceptionOfType(HttpClientErrorException.class)
 				.isThrownBy(() -> handler.handleError(response))
 				.satisfies(ex -> assertThat(ex.getResponseHeaders()).isSameAs(headers))
-				.satisfies(ex -> assertThat(ex.getMessage()).isEqualTo("404 Not Found: [Hello World]"));
-	}
-
-	@Test
-	public void handleErrorWithLongBody() throws Exception {
-
-		Function<Integer, String> bodyGenerator =
-				size -> Flux.just("a").repeat(size-1).reduce((s, s2) -> s + s2).block();
-
-		given(response.getRawStatusCode()).willReturn(HttpStatus.NOT_FOUND.value());
-		given(response.getStatusText()).willReturn("Not Found");
-		given(response.getHeaders()).willReturn(new HttpHeaders());
-		given(response.getBody()).willReturn(
-				new ByteArrayInputStream(bodyGenerator.apply(500).getBytes(StandardCharsets.UTF_8)));
-
-		assertThatExceptionOfType(HttpClientErrorException.class)
-				.isThrownBy(() -> handler.handleError(response))
-				.satisfies(ex -> assertThat(ex.getMessage()).isEqualTo(
-						"404 Not Found: [" + bodyGenerator.apply(200) + "... (500 bytes)]"));
+				.withMessage("404 Not Found: \"Hello World\"");
 	}
 
 	@Test