Add support for OkHttp3

build.gradle

@@ -64,6 +64,7 @@ configure(allprojects) { project ->
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
 	ext.nettyVersion         = "4.0.34.Final"
+	ext.okhttp3Version       = "3.2.0"
 	ext.okhttpVersion        = "2.7.4"
 	ext.openjpaVersion       = "2.4.0"
 	ext.poiVersion           = "3.13"
@@ -712,6 +713,7 @@ project("spring-web") {
 		optional("org.apache.httpcomponents:httpclient:${httpclientVersion}")
 		optional("org.apache.httpcomponents:httpasyncclient:${httpasyncVersion}")
 		optional("io.netty:netty-all:${nettyVersion}")
+		optional("com.squareup.okhttp3:okhttp:${okhttp3Version}")
 		optional("com.squareup.okhttp:okhttp:${okhttpVersion}")
 		optional("com.fasterxml.jackson.core:jackson-databind:${jackson2Version}")
 		optional("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:${jackson2Version}")

spring-web/src/main/java/org/springframework/http/client/OkHttp3AsyncClientHttpRequest.java

@@ -0,0 +1,102 @@
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+import java.net.URI;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.util.concurrent.ListenableFuture;
+import org.springframework.util.concurrent.SettableListenableFuture;
+
+/**
+ * {@link AsyncClientHttpRequest} implementation that uses OkHttp to execute requests.
+ *
+ * <p>Created via the {@link OkHttpClientHttpRequestFactory}.
+ *
+ * @author Luciano Leggieri
+ * @author Arjen Poutsma
+ * @author Roy Clarkson
+ * @since 4.3
+ */
+class OkHttp3AsyncClientHttpRequest extends AbstractBufferingAsyncClientHttpRequest {
+
+	private final OkHttpClient client;
+
+	private final URI uri;
+
+	private final HttpMethod method;
+
+
+	public OkHttp3AsyncClientHttpRequest(OkHttpClient client, URI uri, HttpMethod method) {
+		this.client = client;
+		this.uri = uri;
+		this.method = method;
+	}
+
+
+	@Override
+	public HttpMethod getMethod() {
+		return this.method;
+	}
+
+	@Override
+	public URI getURI() {
+		return this.uri;
+	}
+
+	@Override
+	protected ListenableFuture<ClientHttpResponse> executeInternal(HttpHeaders headers, byte[] content)
+			throws IOException {
+
+		Request request = OkHttp3ClientHttpRequestFactory.buildRequest(headers, content, this.uri, this.method);
+		return new OkHttpListenableFuture(this.client.newCall(request));
+	}
+
+
+	private static class OkHttpListenableFuture extends SettableListenableFuture<ClientHttpResponse> {
+
+		private final Call call;
+
+		public OkHttpListenableFuture(Call call) {
+			this.call = call;
+			this.call.enqueue(new Callback() {
+				@Override
+				public void onResponse(Call call, Response response) {
+					set(new OkHttp3ClientHttpResponse(response));
+				}
+				@Override
+				public void onFailure(Call call, IOException ex) {
+					setException(ex);
+				}
+			});
+		}
+
+		@Override
+		protected void interruptTask() {
+			this.call.cancel();
+		}
+	}
+
+}

spring-web/src/main/java/org/springframework/http/client/OkHttp3ClientHttpRequest.java

@@ -0,0 +1,71 @@
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+import java.net.URI;
+
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+
+/**
+ * {@link ClientHttpRequest} implementation that uses OkHttp 3.x to execute requests.
+ *
+ * <p>Created via the {@link OkHttp3ClientHttpRequestFactory}.
+ *
+ * @author Luciano Leggieri
+ * @author Arjen Poutsma
+ * @author Roy Clarkson
+ * @since 4.3
+ */
+class OkHttp3ClientHttpRequest extends AbstractBufferingClientHttpRequest {
+
+	private final OkHttpClient client;
+
+	private final URI uri;
+
+	private final HttpMethod method;
+
+
+	public OkHttp3ClientHttpRequest(OkHttpClient client, URI uri, HttpMethod method) {
+		this.client = client;
+		this.uri = uri;
+		this.method = method;
+	}
+
+
+	@Override
+	public HttpMethod getMethod() {
+		return this.method;
+	}
+
+	@Override
+	public URI getURI() {
+		return this.uri;
+	}
+
+
+	@Override
+	protected ClientHttpResponse executeInternal(HttpHeaders headers, byte[] content) throws IOException {
+		Request request = OkHttp3ClientHttpRequestFactory.buildRequest(headers, content, this.uri, this.method);
+		return new OkHttp3ClientHttpResponse(this.client.newCall(request).execute());
+	}
+
+}

spring-web/src/main/java/org/springframework/http/client/OkHttp3ClientHttpRequestFactory.java

@@ -0,0 +1,155 @@
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.http.client;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+/**
+ * {@link ClientHttpRequestFactory} implementation that uses
+ * <a href="http://square.github.io/okhttp/">OkHttp</a> 3.x to create requests.
+ *
+ * @author Luciano Leggieri
+ * @author Arjen Poutsma
+ * @author Roy Clarkson
+ * @since 4.3
+ */
+public class OkHttp3ClientHttpRequestFactory
+		implements ClientHttpRequestFactory, AsyncClientHttpRequestFactory, DisposableBean {
+
+	private OkHttpClient client;
+
+	private final boolean defaultClient;
+
+
+	/**
+	 * Create a factory with a default {@link OkHttpClient} instance.
+	 */
+	public OkHttp3ClientHttpRequestFactory() {
+		this.client = new OkHttpClient();
+		this.defaultClient = true;
+	}
+
+	/**
+	 * Create a factory with the given {@link OkHttpClient} instance.
+	 * @param client the client to use
+	 */
+	public OkHttp3ClientHttpRequestFactory(OkHttpClient client) {
+		Assert.notNull(client, "OkHttpClient must not be null");
+		this.client = client;
+		this.defaultClient = false;
+	}
+
+
+	/**
+	 * Sets the underlying read timeout in milliseconds.
+	 * A value of 0 specifies an infinite timeout.
+	 * @see okhttp3.OkHttpClient.Builder#readTimeout(long, TimeUnit)
+	 */
+	public void setReadTimeout(int readTimeout) {
+		this.client = this.client.newBuilder()
+				.readTimeout(readTimeout, TimeUnit.MILLISECONDS)
+				.build();
+	}
+
+	/**
+	 * Sets the underlying write timeout in milliseconds.
+	 * A value of 0 specifies an infinite timeout.
+	 * @see okhttp3.OkHttpClient.Builder#writeTimeout(long, TimeUnit)
+	 */
+	public void setWriteTimeout(int writeTimeout) {
+		this.client = this.client.newBuilder()
+				.writeTimeout(writeTimeout, TimeUnit.MILLISECONDS)
+				.build();
+	}
+
+	/**
+	 * Sets the underlying connect timeout in milliseconds.
+	 * A value of 0 specifies an infinite timeout.
+	 * @see okhttp3.OkHttpClient.Builder#connectTimeout(long, TimeUnit)
+	 */
+	public void setConnectTimeout(int connectTimeout) {
+		this.client = this.client.newBuilder()
+				.connectTimeout(connectTimeout, TimeUnit.MILLISECONDS)
+				.build();
+	}
+
+
+	@Override
+	public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) {
+		return new OkHttp3ClientHttpRequest(this.client, uri, httpMethod);
+	}
+
+	@Override
+	public AsyncClientHttpRequest createAsyncRequest(URI uri, HttpMethod httpMethod) {
+		return new OkHttp3AsyncClientHttpRequest(this.client, uri, httpMethod);
+	}
+
+
+	@Override
+	public void destroy() throws IOException {
+		if (this.defaultClient) {
+			// Clean up the client if we created it in the constructor
+			if (this.client.cache() != null) {
+				this.client.cache().close();
+			}
+			this.client.dispatcher().executorService().shutdown();
+		}
+	}
+
+
+	static Request buildRequest(HttpHeaders headers, byte[] content, URI uri,
+			HttpMethod method) throws MalformedURLException {
+
+		okhttp3.MediaType contentType = getContentType(headers);
+		RequestBody body = (content.length > 0 ? RequestBody.create(contentType, content) : null);
+
+		URL url = uri.toURL();
+		String methodName = method.name();
+		Request.Builder builder = new Request.Builder().url(url).method(methodName, body);
+
+		for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
+			String headerName = entry.getKey();
+			for (String headerValue : entry.getValue()) {
+				builder.addHeader(headerName, headerValue);
+			}
+		}
+
+		return builder.build();
+	}
+
+	private static okhttp3.MediaType getContentType(HttpHeaders headers) {
+		String rawContentType = headers.getFirst(HttpHeaders.CONTENT_TYPE);
+		return (StringUtils.hasText(rawContentType) ? okhttp3.MediaType.parse(rawContentType) : null);
+	}
+
+}