阿里云HttpDns接入

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http://www.milovetingting.cn

前言

简单记录集成阿里云HTTPDNS服务的过程

什么是HTTPDNS

HTTPDNS是面向多端应用（移动端APP，PC客户端应用）的域名解析服务，具备域名防劫持、精准调度、实时解析生效的特性。

以上来自阿里云HTTPDNS文档。

接入流程

服务开通

HTTPDNS是移动研发平台提供的服务，请参考EMAS 快速入门开通服务。

1. 开通服务后，进入控制台，点击添加产品，如图所示

2. 完成添加产品后，点击添加应用，如图所示

3. 添加应用完成后，点击刚才添加的应用

4. 查看Account ID,这个id后面配置dns会用到

5. 在域名列表中添加域名

Android SDK 接入

1. 在项目根目录下的build.gradle文件中添加Maven仓库地址

allprojects {
    repositories {
        maven {
            url 'http://maven.aliyun.com/nexus/content/repositories/releases/'
        }
    }
}

2. 在须要引入HTTPDNS服务的模块下的build.gradle中添加依赖

dependencies {
    compile ('com.aliyun.ams:alicloud-android-httpdns:1.3.3@aar') {
        transitive true
    }
}

按照以上官方文档配置，在同步工程后，会报错

Could not find com.aliyun.ams:alicloud-android-utdid:1.1.5.4.
Searched in the following locations:
  - http://maven.aliyun.com/nexus/content/repositories/releases/com/aliyun/ams/alicloud-android-utdid/1.1.5.4/alicloud-android-utdid-1.1.5.4.pom
  - https://dl.google.com/dl/android/maven2/com/aliyun/ams/alicloud-android-utdid/1.1.5.4/alicloud-android-utdid-1.1.5.4.pom
  - https://jcenter.bintray.com/com/aliyun/ams/alicloud-android-utdid/1.1.5.4/alicloud-android-utdid-1.1.5.4.pom
Required by:
    project :app > com.aliyun.ams:alicloud-android-httpdns:1.3.3 > com.aliyun.ams:alicloud-android-beacon:1.0.4.3

修改以下

implementation('com.aliyun.ams:alicloud-android-httpdns:1.3.3@aar') {
    transitive true
    exclude group: 'com.aliyun.ams', module: 'alicloud-android-utdid'
}
implementation 'com.aliyun.ams:alicloud-android-utdid:1.1.5.3'

3. 引入Retrofit及gson

   增长依赖

   implementation 'com.squareup.retrofit2:retrofit:2.3.0'
   implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
   implementation 'com.google.code.gson:gson:2.8.6'

4. 配置DNS

   新建一个类，继承Dns

   public class AliDns implements Dns {
   
       private HttpDnsService httpDns;
   
       public AliDns(Context context) {
           //传入account_id，account_id为HTTPDNS控制台添加应用时生成的
           httpDns = HttpDns.getService(context, "account_id");
       }
   
       @Override
       public List<InetAddress> lookup(String hostname) throws UnknownHostException {
           //经过异步解析接口获取ip
           String ip = httpDns.getIpByHostAsync(hostname);
           //Android9.0系统及之后版本，https请求没法直接访问，方便起见，直接在AndroidManifest.xml中配置android:usesCleartextTraffic="true"
           if (ip != null) {
               //若是ip不为null，直接使用该ip进行网络请求
               Log.e("AliDns", "ip:" + ip);
               List<InetAddress> inetAddresses = Arrays.asList(InetAddress.getAllByName(ip));
               return inetAddresses;
           }
           //若是返回null，走系统DNS服务解析域名
           return Dns.SYSTEM.lookup(hostname);
       }
   }

   设置OkHttpClient的dns

   OkHttpClient client = new OkHttpClient.Builder().dns(new AliDns(getApplicationContext())).build();

5. 调用请求

   Retrofit retrofit = new Retrofit.Builder().client(client).baseUrl("域名").addConverterFactory(GsonConverterFactory.create()).build();
   Api api = retrofit.create(Api.class);
   Call<Bean> call = api.getBanner();
   call.enqueue(new Callback<Bean>() {
       @Override
       public void onResponse(Call<Bean> call, Response<Bean> response) {
           if (!response.isSuccessful()) {
               tv.setText("请求失败，错误码:" + response.code());
               return;
       	}
           Bean bean = response.body();
           tv.setText(bean.toString());
       }
   
       @Override
       public void onFailure(Call<Bean> call, Throwable t) {
       	tv.setText(t.getMessage());
       }
   });

源码

https://github.com/milovetingting/Samples