带有 sslSocketFactory 的 Okhttp.Builder 中的

Question

我正在处理一个项目，该项目需要利用允许所有证书进行一次调用，每当我尝试设置 sslSocketFactory 时，我都会收到一个错误，指示 ExceptionInInitializerError。我搜索了 SO 并发现了这个问题，但它并没有为我解决问题；这个 Git 问题也一样。我的示例代码如下：   X509TrustManager trustManager = new X509TrustManager() {        public void checkClientTrusted(X509Certificate[] xcs, String string)                throws CertificateException {}        public void checkServerTrusted(X509Certificate[] xcs, String string)                throws CertificateException {}        public X509Certificate[] getAcceptedIssuers() {            return null;        }    };    SSLContext sslContext;    SSLSocketFactory sslSocketFactory = null;    try {        sslContext = SSLContext.getInstance("TLS");        sslContext.init(null, new TrustManager[]{trustManager}, null);        sslSocketFactory = sslContext.getSocketFactory();    } catch (Exception e){        e.printStackTrace();    }    OkHttpClient client = new OkHttpClient.Builder().sslSocketFactory(sslSocketFactory,            trustManager).addInterceptor(interceptor).build();当发送的参数全部有效且不为空时，为什么我会收到错误消息？

Answer 1

事实证明，问题是由在 okhttp3 构建器方法中调用 NullPointerException 引起的。确切的代码在这里：

Caused by: java.lang.NullPointerException: Attempt to get length of null array

        at okhttp3.internal.tls.BasicTrustRootIndex.<init>(BasicTrustRootIndex.java:32)

        at okhttp3.internal.platform.Platform.buildTrustRootIndex(Platform.java:288)

        at okhttp3.internal.platform.AndroidPlatform.buildTrustRootIndex(AndroidPlatform.java:280)

        at okhttp3.internal.platform.Platform.buildCertificateChainCleaner(Platform.java:172)

        at okhttp3.internal.platform.AndroidPlatform.buildCertificateChainCleaner(AndroidPlatform.java:230)

        at okhttp3.internal.tls.CertificateChainCleaner.get(CertificateChainCleaner.java:41)

        at okhttp3.OkHttpClient$Builder.sslSocketFactory(OkHttpClient.java:694)

这个问题的原因是我在 Stackoverflow（此处为IE）上遵循了大量示例，这些示例告诉您使用该行构建 x509 TrustManager return null;。

解决方法是简单地更改一行：

    X509TrustManager trustManager = new X509TrustManager() {

        public void checkClientTrusted(X509Certificate[] xcs, String string)

                throws CertificateException {}

        public void checkServerTrusted(X509Certificate[] xcs, String string)

                throws CertificateException {}

        public X509Certificate[] getAcceptedIssuers() {

            //Here

            return new X509Certificate[]{};

        }

    };

    .

    .

    .

这解决了这个问题。