??應(yīng)該有很多小伙伴遇到這樣一個(gè)問題，在線上已發(fā)布的app里，關(guān)于https的cer證書過期，從而導(dǎo)致app所有網(wǎng)絡(luò)請求失效無法使用。
??這個(gè)時(shí)候有人就要說了，應(yīng)急發(fā)布一個(gè)已更新最新cer證書的apk不就完事了么，其實(shí)沒那么簡單，iOS還好可以通過appstore提供的api查詢到新版本，但android就不一樣了，需要調(diào)用自己Server端提供的api接口查詢到新版本，并獲取apk下載路徑，問題是https都不能訪問了，如何請求到版本信息呢？
??博主在這里提供2種解決方案
??方案一：將版本信息接口讓后臺(tái)改成http（不推薦，后臺(tái)因素不可控），或者將本地https的設(shè)置一個(gè)不安全校驗(yàn)（推薦），代碼如下:

private static OkHttpClient newOkHttpClient(int timeout){

        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
        logging.setLevel(HttpLoggingInterceptor.Level.BODY);

        return new OkHttpClient.Builder()
                .addInterceptor(new RequestInfoInterceptor())
                //.addInterceptor(logging)
                .addNetworkInterceptor(new TokenHeaderInterceptor())
                .sslSocketFactory(Certificate.getSSLSocketFactory())
                //設(shè)置不安全校驗(yàn)
                .hostnameVerifier(Certificate.getUnSafeHostnameVerifier())
                .readTimeout(timeout, TimeUnit.SECONDS)
                .writeTimeout(timeout, TimeUnit.SECONDS)
                .build();
    }

    /**
     *獲取HostnameVerifier 
     */
    public static HostnameVerifier getUnSafeHostnameVerifier() {
        HostnameVerifier hostnameVerifier = new HostnameVerifier() {
            @Override
            public boolean verify(String s, SSLSession sslSession) {
                return true;
            }
        };
        return hostnameVerifier;
    }

??方案二：將xxx.cer證書改成動(dòng)態(tài)讀取（以文件的方式從app沙盒里面讀取即可），在https證書即將過期時(shí)，從服務(wù)器下載最新的cer證書更新到沙盒里面，App每次初始化網(wǎng)絡(luò)請求時(shí)讀取sdcard最新的證書文件，這樣App就永遠(yuǎn)不會(huì)出現(xiàn)https證書過期導(dǎo)致無法使用的問題，流程圖如下：

image.png

    private static OkHttpClient newOkHttpClient(int timeout){

        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
        logging.setLevel(HttpLoggingInterceptor.Level.BODY);

        return new OkHttpClient.Builder()
                .addInterceptor(new RequestInfoInterceptor())
                //.addInterceptor(logging)
                .addNetworkInterceptor(new TokenHeaderInterceptor())
                .sslSocketFactory(Certificate.getSSLSocketFactory(BaseApplcation.myApp, new String[]{"/sdcard/xxx.cer"}))
                .hostnameVerifier(Certificate.getUnSafeHostnameVerifier())
                .readTimeout(timeout, TimeUnit.SECONDS)
                .writeTimeout(timeout, TimeUnit.SECONDS)
                .build();
    }
  
    /**
     * 帶證書的，從本地文件讀取
     * @param context
     * @param certificatesFiles  本地文件（通過下載到本地）
     * @return
     */
    public static SSLSocketFactory getSSLSocketFactory(Context context, String[] certificatesFiles) {
        if (context == null) {
            throw new NullPointerException("context == null");
        }
        CertificateFactory certificateFactory;
        try {
            certificateFactory = CertificateFactory.getInstance("X.509");
            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);

            for (int i = 0; i < certificatesFiles.length; i++) {
                InputStream certificate = new FileInputStream(certificatesFiles[i]);
                keyStore.setCertificateEntry(String.valueOf(i), certificateFactory.generateCertificate(certificate));

                if (certificate != null) {
                    certificate.close();
                }
            }
            SSLContext sslContext = SSLContext.getInstance("TLS");
            TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init(keyStore);
            sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (Exception e) {

        }
        return null;
    }

  /**
     * 帶證書的，從raw資源中讀取
     * @param context
     * @param certificates  rawIds
     * @return
     */
    public static SSLSocketFactory getSSLSocketFactory(Context context, int[] certificates) {
        if (context == null) {
            throw new NullPointerException("context == null");
        }
        CertificateFactory certificateFactory;
        try {
            certificateFactory = CertificateFactory.getInstance("X.509");
            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);

            for (int i = 0; i < certificates.length; i++) {
                InputStream certificate = context.getResources().openRawResource(certificates[i]);
                keyStore.setCertificateEntry(String.valueOf(i), certificateFactory.generateCertificate(certificate));

                if (certificate != null) {
                    certificate.close();
                }
            }
            SSLContext sslContext = SSLContext.getInstance("TLS");
            TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init(keyStore);
            sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (Exception e) {

        }
        return null;
    }

總結(jié)一下，方案一需要App升級(jí)解決證書過期問題，方案二無需升級(jí)即可解決升級(jí)問題，小伙伴們，設(shè)置證書用哪種方式，心里有答案了吧。
代碼雖簡單，就當(dāng)做個(gè)筆記。