Upgrade to Netty 4.1

Issue: SPR-14143

build.gradle

@@ -63,9 +63,9 @@ configure(allprojects) { project ->
 	ext.jsonpathVersion      = "2.2.0"
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
-	ext.nettyVersion         = "4.0.36.Final"
-    ext.okhttp3Version       = "3.2.0"
+	ext.nettyVersion         = "4.1.0.CR7"
 	ext.okhttpVersion        = "2.7.5"
+	ext.okhttp3Version       = "3.2.0"
 	ext.openjpaVersion       = "2.4.1"
 	ext.poiVersion           = "3.14"
 	ext.protobufVersion      = "2.6.1"

spring-web/src/main/java/org/springframework/http/client/Netty4ClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -42,8 +42,8 @@ import org.springframework.util.concurrent.ListenableFuture;
 import org.springframework.util.concurrent.SettableListenableFuture;
 
 /**
- * {@link org.springframework.http.client.ClientHttpRequest} implementation that uses
- * Netty 4 to execute requests.
+ * {@link org.springframework.http.client.ClientHttpRequest} implementation
+ * that uses Netty 4 to execute requests.
  *
  * <p>Created via the {@link Netty4ClientHttpRequestFactory}.
  *
@@ -148,8 +148,8 @@ class Netty4ClientHttpRequest extends AbstractAsyncClientHttpRequest implements
 		FullHttpRequest nettyRequest = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1,
 				nettyMethod, this.uri.toString(), this.body.buffer());
 
-		nettyRequest.headers().set(HttpHeaders.HOST, uri.getHost());
-		nettyRequest.headers().set(HttpHeaders.CONNECTION, io.netty.handler.codec.http.HttpHeaders.Values.CLOSE);
+		nettyRequest.headers().set(HttpHeaders.HOST, this.uri.getHost());
+		nettyRequest.headers().set(HttpHeaders.CONNECTION, "close");
 
 		for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
 			nettyRequest.headers().add(entry.getKey(), entry.getValue());

spring-web/src/main/java/org/springframework/http/client/Netty4ClientHttpResponse.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -28,8 +28,8 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.util.Assert;
 
 /**
- * {@link org.springframework.http.client.ClientHttpResponse} implementation that uses
- * Netty 4 to execute requests.
+ * {@link org.springframework.http.client.ClientHttpResponse} implementation
+ * that uses Netty 4 to parse responses.
  *
  * @author Arjen Poutsma
  * @since 4.1.2
@@ -56,11 +56,13 @@ class Netty4ClientHttpResponse extends AbstractClientHttpResponse {
 
 
 	@Override
+	@SuppressWarnings("deprecation")
 	public int getRawStatusCode() throws IOException {
 		return this.nettyResponse.getStatus().code();
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	public String getStatusText() throws IOException {
 		return this.nettyResponse.getStatus().reasonPhrase();
 	}