OkHttp

Overview

HTTP is the way modern applications network. It’s how we exchange data & media. Doing HTTP efficiently makes your stuff load faster and saves bandwidth.

OkHttp is an HTTP client that’s efficient by default:

• HTTP/2 support allows all requests to the same host to share a socket.
• Connection pooling reduces request latency (if HTTP/2 isn’t available).
• Transparent GZIP shrinks download sizes.
• Response caching avoids the network completely for repeat requests.

OkHttp perseveres when the network is troublesome: it will silently recover from common connection problems. If your service has multiple IP addresses OkHttp will attempt alternate addresses if the first connect fails. This is necessary for IPv4+IPv6 and for services hosted in redundant data centers. OkHttp initiates new connections with modern TLS features (SNI, ALPN), and falls back to TLS 1.0 if the handshake fails.

Using OkHttp is easy. Its request/response API is designed with fluent builders and immutability. It supports both synchronous blocking calls and async calls with callbacks.

OkHttp supports Android 2.3 and above. For Java, the minimum requirement is 1.7.

Examples

Get a URL

This program downloads a URL and print its contents as a string. Full source.

OkHttpClient client = new OkHttpClient();

String run(String url) throws IOException {
  Request request = new Request.Builder()
      .url(url)
      .build();

  Response response = client.newCall(request).execute();
  return response.body().string();
}

Post to a Server

This program posts data to a service. Full source.

public static final MediaType JSON
    = MediaType.parse("application/json; charset=utf-8");

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {
  RequestBody body = RequestBody.create(JSON, json);
  Request request = new Request.Builder()
      .url(url)
      .post(body)
      .build();
  Response response = client.newCall(request).execute();
  return response.body().string();
}

Download

↓ Latest JAR

You’ll also need Okio, which OkHttp uses for fast I/O and resizable buffers. Download the latest JAR.

The source code to OkHttp, its samples, and this website is available on GitHub.

Maven

<dependency>
  <groupId>com.squareup.okhttp3</groupId>
  <artifactId>okhttp</artifactId>
  <version>(insert latest version)</version>
</dependency>

Gradle

compile 'com.squareup.okhttp3:okhttp:(insert latest version)'

Contributing

If you would like to contribute code you can do so through GitHub by forking the repository and sending a pull request.

When submitting code, please make every effort to follow existing conventions and style in order to keep the code as readable as possible. Please also make sure your code compiles by running mvn clean verify.

Before your code can be accepted into the project you must also sign the Individual Contributor License Agreement (CLA).

License

Copyright 2016 Square, Inc.

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.

原文okhttp

添加cookie

private static final HashMap<String, List<Cookie>> cookieStore = new HashMap<String, List<Cookie>>();
	OkHttpClient client = new OkHttpClient.Builder()
		    .cookieJar(new CookieJar() {
				
				public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
					// TODO Auto-generated method stub
					 cookieStore.put(url.host(), cookies);
				}
				
				public List<Cookie> loadForRequest(HttpUrl url) {
					// TODO Auto-generated method stub
					List<Cookie> cookies = cookieStore.get(url.host());
		            return cookies != null ? cookies : new ArrayList<Cookie>();
				}
			})
		    .build();

请求参数

https://github.com/square/okhttp/wiki/Recipes

RequestBody formBody = new FormBody.Builder()
		        .add("m", "Index")
		        .add("s", "doindex")
		        .add("c", "012")
		        .build();

json转类

Gson gson = new Gson();
Repository repository = gson.fromJson(json, Repository.class);
System.out.println(repository.getName());