Retrofit 2 okhttp 3 使用笔记

• Retrofit注解
• Interceptor拦截器的使用
• 配置https证书

Retrofit注解

【Android】Retrofit网络请求参数注解GET、POST、DELETE还有PUT的请求，说明@Path、@Query、@QueryMap、@Body、@Field的用法。
http://www.jianshu.com/p/7687365aa946

Interceptor拦截器的使用

package okhttp3;import java.io.IOException;import javax.annotation.Nullable;/** * Observes, modifies, and potentially short-circuits requests going out and the corresponding * responses coming back in. Typically interceptors add, remove, or transform headers on the request * or response. * 观察，修改 潜在的拦截（短路）请求，并返回相应的响应（response）。拦截器可以在请求或响应（rquest or response）中添加，删除，修改headers  *  */public interface Interceptor {  Response intercept(Chain chain) throws IOException;  interface Chain {    //拦截发出去的请求    Request request();    //继续一个请求    Response proceed(Request request) throws IOException;    /**     * Returns the connection the request will be executed on. This is only available in the chains     * of network interceptors; for application interceptors this is always null.     * 返回请求将要直行的connection      * 这只适用于网络拦截器的chains。 对于应用程序拦截器，这总是空的。     */    @Nullable Connection connection();  }}

配置https 证书

主要使用的是OkHttpClient.Builder.sslSocketFactory(SSLSocketFactory sslSocketFactory, X509TrustManager trustManager)
方法
.hostnameVerifier() 用来验证主机名

private  static  OkHttpClient getOKhttpClient() {        TrustManagerFactory trustManagerFactory = null;        InputStream is = null;        try {            // 取到证书的输入流            is = MyApplication.getInstance().getAssets().open("your.crt");            CertificateFactory cf = CertificateFactory.getInstance("X.509");            final Certificate ca;            try {                ca = cf.generateCertificate(is);            }finally {                is.close();            }            TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {                @Override                public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {                }                @Override                public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {                    //校验服务器证书                    for (X509Certificate cert : chain) {                        cert.checkValidity();                        try {                            cert.verify(ca.getPublicKey());//                            isServerTrusted = true;                        } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchProviderException | SignatureException e) {                            e.printStackTrace();//                            isServerTrusted = false;                        }                    }                }                @Override                public X509Certificate[] getAcceptedIssuers() {                    return new X509Certificate[0];                }            }};            HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {                public boolean verify(String hostname, SSLSession session) {                    if("yourXX.com".equals(hostname)){                        return  true;                    }                    return false;                }            };            X509TrustManager trustManager = (X509TrustManager) trustManagers[0];            // 用 TrustManager 初始化一个 SSLContext            SSLContext sslContext = SSLContext.getInstance("TLS");            sslContext.init(null,trustManagers, null);            SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();            OkHttpClient okHttpClient = new OkHttpClient.Builder()//                    .sslSocketFactory(aDefault.getSocketFactory())                    .hostnameVerifier(DO_NOT_VERIFY)                    .sslSocketFactory(sslSocketFactory, trustManager)                    .addInterceptor(new Interceptor() {                        @Override                        public Response intercept(Chain chain) throws IOException {                            Request request = chain.request()                                    .newBuilder()                                    .addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8")                                    .addHeader("Accept-Encoding", "gzip, deflate")                                    .addHeader("Connection", "keep-alive")                                    .addHeader("Accept", "*/*")                                    .addHeader("token","your token ")                                    .build();                            return chain.proceed(request);                        }                    })                    .build();            return okHttpClient;        } catch (NoSuchAlgorithmException e) {            e.printStackTrace();        } catch (KeyManagementException e) {            e.printStackTrace();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (CertificateException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return null;    }