java.io.IOException：主机名未验证[重复]

我正在尝试从 Andorid 版本 4.1.1 中的 Android 应用程序连接到 URL，并且收到问题标题中指示的错误，但是当我尝试从 Andorid 版本 4.0.4 或 3.1 连接相同的 URL 时，一切正常。

代码片段：

    try {
        .
        .
        .
        URL url = new URL(urlStr);
        Log.i(TAG,"[ URL ] " + urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        int size = conn.getContentLength();
        int responsecode = conn.getResponseCode();
        Log.d(TAG, "Responsecode: " + responsecode);
        .
        .
        .
        } catch (Exception e) {
        e.printStackTrace();
        }


private static void trustAllHosts() {

        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                    return new java.security.cert.X509Certificate[] {};
            }

            public void checkClientTrusted(X509Certificate[] chain,
                            String authType) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain,
                            String authType) throws CertificateException {
            }
        } };

        try {
                SSLContext sc = SSLContext.getInstance("TLS");
                sc.init(null, trustAllCerts, new java.security.SecureRandom());
                HttpsURLConnection
                                .setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e) {
                System.out.println("IOException : HTTPSRequest::trustAllHosts");
                e.printStackTrace();
        }
    }

但在这里我清楚一件事是“也许证书是自签名证书，并且不将它们包含在密钥库中。

我不明白为什么这个异常只发生在Android版本4.1.1操作系统中 谢谢。

全栈跟踪

01-31 10:26:08.348: W/System.err(3158): java.io.IOException: Hostname <URL> was not verified
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpConnection.verifySecureSocketHostname(HttpConnection.java:223)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:446)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpURLConnectionImpl.getHeaderField(HttpURLConnectionImpl.java:130)
01-31 10:26:08.348: W/System.err(3158):     at java.net.URLConnection.getHeaderFieldInt(URLConnection.java:544)
01-31 10:26:08.348: W/System.err(3158):     at java.net.URLConnection.getContentLength(URLConnection.java:316)
01-31 10:26:08.348: W/System.err(3158):     at libcore.net.http.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:191)
01-31 10:26:08.348: W/System.err(3158):     at com.ih.util.HelpVideoServices$downloadTask.run(HelpVideoServices.java:172)                                

如果您运行的证书没有任何意义并且您想绕过它们，您还需要添加一个空主机名验证器以使此代码正常工作

HttpsURLConnection.setDefaultHostnameVerifier(new NullHostNameVerifier());
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, new X509TrustManager[]{new NullX509TrustManager()}, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());

以及主机的代码：

import javax.net.ssl.HostnameVerifier ;
import javax.net.ssl.SSLSession;

public class NullHostNameVerifier implements HostnameVerifier {

    @Override   
    public boolean verify(String hostname, SSLSession session) {
        Log.i("RestUtilImpl", "Approving certificate for " + hostname);
        return true;
    }

}

这需要运行一次，但如果您要更改连接对象，则可能需要再次运行它。