1<!DOCTYPE html> 2<html lang="en"> 3 <head> 4 <meta charset="utf-8"> 5 <title>OkHttp</title> 6 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 7 <meta name="description" content="An HTTP & SPDY client for Android and Java applications"> 8 <link href="static/bootstrap-combined.min.css" rel="stylesheet"> 9 <link href="static/app.css" rel="stylesheet"> 10 <link href="static/app-theme.css" rel="stylesheet"> 11 <link href="http://fonts.googleapis.com/css?family=Roboto:400,300italic,100,100italic,300" rel="stylesheet" type="text/css"> 12 <!--[if lt IE 9]><script src="static/html5shiv.min.js"></script><![endif]--> 13 </head> 14 <body data-target=".content-nav"> 15 <header> 16 <div class="container"> 17 <div class="row"> 18 <div class="span5"> 19 <h1>OkHttp</h1> 20 </div> 21 <div class="span7"> 22 <menu> 23 <ul> 24 <li><a href="#download" class="menu download">Download <span class="version-tag">Latest</span></a></li> 25 <li><a href="http://github.com/square/okhttp" data-title="View GitHub Project" class="menu github"><img src="static/icon-github.png" alt="GitHub"/></a></li> 26 <li><a href="http://square.github.io/" data-title="Square Open Source Portal" class="menu square"><img src="static/icon-square.png" alt="Square"/></a></li> 27 </ul> 28 </menu> 29 </div> 30 </div> 31 </header> 32 <section id="subtitle"> 33 <div class="container"> 34 <div class="row"> 35 <div class="span12"> 36 <h2>An <strong>HTTP & SPDY</strong> client for Android and Java applications</h2> 37 </div> 38 </div> 39 </div> 40 </section> 41 <section id="body"> 42 <div class="container"> 43 <div class="row"> 44 <div class="span9"> 45 <h3 id="overview">Overview</h3> 46 <p>HTTP is the way modern applications network. It’s how we exchange data & media. 47 Doing HTTP efficiently makes your stuff load faster and saves bandwidth.</p> 48 49 <p>OkHttp is an HTTP client that’s efficient by default:</p> 50 <ul> 51 <li>HTTP/2 and SPDY support allows all requests to the same host to share a socket.</li> 52 <li>Connection pooling reduces request latency (if SPDY isn’t available).</li> 53 <li>Transparent GZIP shrinks download sizes.</li> 54 <li>Response caching avoids the network completely for repeat requests.</li> 55 </ul> 56 57 <p>OkHttp perseveres when the network is troublesome: it will silently recover from 58 common connection problems. If your service has multiple IP addresses OkHttp will 59 attempt alternate addresses if the first connect fails. This is necessary for IPv4+IPv6 60 and for services hosted in redundant data centers. OkHttp initiates new connections 61 with modern TLS features (SNI, ALPN), and falls back to TLS 1.0 if the handshake 62 fails.</p> 63 64 <p>Using OkHttp is easy. Its 2.0 API is designed with fluent builders and 65 immutability. It supports both synchronous blocking calls and async calls with 66 callbacks.</p> 67 68 <p>You can try out OkHttp without rewriting your network code. The 69 <code>okhttp-urlconnection</code> module implements the familiar 70 <code>java.net.HttpURLConnection</code> API and the <code>okhttp-apache</code> 71 module implements the Apache <code>HttpClient</code> API.</p> 72 73 <p>OkHttp supports Android 2.3 and above. For Java, the minimum requirement is 1.7.</p> 74 75 <h3 id="examples">Examples</h3> 76 <h4>Get a URL</h4> 77 <p>This program downloads a URL and print its contents as a string. <a href="https://raw.github.com/square/okhttp/master/samples/guide/src/main/java/com/squareup/okhttp/guide/GetExample.java">Full source</a>. 78<pre class="prettyprint"> 79OkHttpClient client = new OkHttpClient(); 80 81String run(String url) throws IOException { 82 Request request = new Request.Builder() 83 .url(url) 84 .build(); 85 86 Response response = client.newCall(request).execute(); 87 return response.body().string(); 88} 89</pre> 90 <h4>Post to a Server</h4> 91 <p>This program posts data to a service. <a href="https://raw.github.com/square/okhttp/master/samples/guide/src/main/java/com/squareup/okhttp/guide/PostExample.java">Full source</a>. 92 93<pre class="prettyprint"> 94public static final MediaType JSON 95 = MediaType.parse("application/json; charset=utf-8"); 96 97OkHttpClient client = new OkHttpClient(); 98 99String post(String url, String json) throws IOException { 100 RequestBody body = RequestBody.create(JSON, json); 101 Request request = new Request.Builder() 102 .url(url) 103 .post(body) 104 .build(); 105 Response response = client.newCall(request).execute(); 106 return response.body().string(); 107} 108</pre> 109 110 <h3 id="download">Download</h3> 111 <p><a href="https://search.maven.org/remote_content?g=com.squareup.okhttp&a=okhttp&v=LATEST" class="dl version-href">↓ <span class="version-tag">Latest</span> JAR</a></p> 112 <p>You'll also need <a href="http://github.com/square/okio">Okio</a>, which OkHttp 113 uses for fast I/O and resizable buffers. Download the 114 <a href="https://search.maven.org/remote_content?g=com.squareup.okio&a=okio&v=LATEST">latest JAR</a>. 115 <p>The source code to OkHttp, its samples, and this website is <a href="http://github.com/square/okhttp">available on GitHub</a>.</p> 116 117 <h4>Maven</h4> 118 <pre class="prettyprint"><dependency> 119 <groupId>com.squareup.okhttp</groupId> 120 <artifactId>okhttp</artifactId> 121 <version><span class="version pln"><em>(insert latest version)</em></span></version> 122</dependency></pre> 123 124 <h4>Gradle</h4> 125 <pre class="prettyprint">compile 'com.squareup.okhttp:okhttp:<span class="version pln"><em>(insert latest version)</em></span>'</pre> 126 127 <h3 id="contributing">Contributing</h3> 128 <p>If you would like to contribute code you can do so through GitHub by forking the repository and sending a pull request.</p> 129 <p>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 <code>mvn clean verify</code>.</p> 130 <p>Before your code can be accepted into the project you must also sign the <a href="http://squ.re/sign-the-cla">Individual Contributor License Agreement (CLA)</a>.</p> 131 132 <h3 id="license">License</h3> 133 <pre>Copyright 2014 Square, Inc. 134 135Licensed under the Apache License, Version 2.0 (the "License"); 136you may not use this file except in compliance with the License. 137You may obtain a copy of the License at 138 139 http://www.apache.org/licenses/LICENSE-2.0 140 141Unless required by applicable law or agreed to in writing, software 142distributed under the License is distributed on an "AS IS" BASIS, 143WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 144See the License for the specific language governing permissions and 145limitations under the License.</pre> 146 </div> 147 <div class="span3"> 148 <div class="content-nav" data-spy="affix" data-offset-top="80"> 149 <ul class="nav nav-tabs nav-stacked primary"> 150 <li><a href="#overview">Overview</a></li> 151 <li><a href="#examples">Examples</a></li> 152 <li><a href="#download">Download</a></li> 153 <li><a href="#contributing">Contributing</a></li> 154 <li><a href="#license">License</a></li> 155 </ul> 156 <ul class="nav nav-pills nav-stacked secondary"> 157 <li><a href="https://github.com/square/okhttp/wiki">Wiki</a></li> 158 <li><a href="2.x/okhttp/">Javadoc</a></li> 159 <li><a href="http://stackoverflow.com/questions/tagged/okhttp?sort=active">StackOverflow</a></li> 160 </ul> 161 </div> 162 </div> 163 </div> 164 <div class="row"> 165 <div class="span12 logo"> 166 <a href="https://squareup.com"><img src="static/logo-square.png" alt="Square, Inc."/></a> 167 </div> 168 </div> 169 </div> 170 </section> 171 <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> 172 <script src="static/bootstrap.min.js"></script> 173 <script src="static/jquery.smooth-scroll.min.js"></script> 174 <script src="static/jquery-maven-artifact.min.js"></script> 175 <script src="static/prettify.js"></script> 176 <script type="text/javascript"> 177 $(function() { 178 // Syntax highlight code blocks. 179 prettyPrint(); 180 181 // Spy on scroll position for real-time updating of current section. 182 $('body').scrollspy(); 183 184 // Use smooth-scroll for internal links. 185 $('a').smoothScroll(); 186 187 // Enable tooltips on the header nav image items. 188 $('.menu').tooltip({ 189 placement: 'bottom', 190 trigger: 'hover', 191 container: 'body', 192 delay: { 193 show: 500, 194 hide: 0 195 } 196 }); 197 198 // Look up the latest version of the library. 199 $.fn.artifactVersion({ 200 'groupId': 'com.squareup.okhttp', 201 'artifactId': 'okhttp' 202 }, function(version, url) { 203 $('.version').text(version); 204 $('.version-tag').text('v' + version); 205 $('.version-href').attr('href', url); 206 }); 207 }); 208 209 var _gaq = _gaq || []; 210 _gaq.push(['_setAccount', 'UA-40704740-2']); 211 _gaq.push(['_trackPageview']); 212 213 (function() { 214 var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; 215 ga.src = ('https:' == document.location.protocol ? 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