我制作了一個爬蟲應用程序，由于錯誤“握手警報：unrecognized_name”，某些網站無法連接。我發現的大多數解決方案是通過禁用 SNI 擴展 (jsse.enableSNIExtension=false)。但這會給需要啟用 SNI 的域帶來問題。我怎樣才能只對某些域禁用它？為了進行爬行，我使用了 Jsoup，并且因為我也在使用代理，所以我在啟動時添加了這段代碼。 private static void disableSslVerification() { TrustManager[] trustAllCertificates = new TrustManager[] { new X509TrustManager() { @Override public X509Certificate[] getAcceptedIssuers() { return null; // Not relevant. } @Override public void checkClientTrusted(X509Certificate[] certs, String authType) { // Do nothing. Just allow them all. } @Override public void checkServerTrusted(X509Certificate[] certs, String authType) { // Do nothing. Just allow them all. } } }; HostnameVerifier trustAllHostnames = new HostnameVerifier() { @Override public boolean verify(String hostname, SSLSession session) { return true; // Just allow them all. } }; try { System.setProperty("https.protocols", "TLSv1.2,TLSv1.1,SSLv3"); // System.setProperty("jsse.enableSNIExtension", "false"); SSLContext sc = SSLContext.getInstance("SSL"); sc.init(null, trustAllCertificates, new SecureRandom()); HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory()); HttpsURLConnection.setDefaultHostnameVerifier(trustAllHostnames); } catch (GeneralSecurityException e) { throw new ExceptionInInitializerError(e); }}如您所見，SNIextension 已被注釋。我會很感激一個例子。我要訪問的網址是下一個。https://www.ocinerioshopping.es/
1 回答
慕的地10843
TA貢獻1785條經驗 獲得超8個贊
我設法通過擴展 SSLSocketConnection 并在調用 createSocket 時發送 null 而不是主機名來解決問題。這樣java就禁用了SNI。然后我只是將新類的一個實例傳遞給 Jsoup，我知道 SNI 將在其中失敗。
import javax.net.ssl.*;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
public class CustomSSLSocketFactory extends SSLSocketFactory {
private SSLSocketFactory defaultFactory;
public CustomSSLSocketFactory() throws IOException {
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String authType) {
}
public void checkServerTrusted(X509Certificate[] chain, String authType) {
}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}};
try {
SSLContext sslContext = SSLContext.getInstance("SSL");
sslContext.init((KeyManager[])null, trustAllCerts, new SecureRandom());
defaultFactory = sslContext.getSocketFactory();
} catch (KeyManagementException | NoSuchAlgorithmException var3) {
throw new IOException("Can't create unsecure trust manager");
}
}
@Override
public String[] getDefaultCipherSuites() {
return defaultFactory.getDefaultCipherSuites();
}
@Override
public String[] getSupportedCipherSuites() {
return defaultFactory.getSupportedCipherSuites();
}
@Override
public Socket createSocket(Socket socket, String s, int i, boolean b) throws IOException {
//magic happens here, we send null as hostname
return defaultFactory.createSocket(socket, null, i, b);
}
@Override
public Socket createSocket(String s, int i) throws IOException, UnknownHostException {
return defaultFactory.createSocket(s,i);
}
@Override
public Socket createSocket(String s, int i, InetAddress inetAddress, int i1) throws IOException, UnknownHostException {
return defaultFactory.createSocket(s,i,inetAddress,i1);
}
@Override
public Socket createSocket(InetAddress inetAddress, int i) throws IOException {
return defaultFactory.createSocket(inetAddress, i);
}
@Override
public Socket createSocket(InetAddress inetAddress, int i, InetAddress inetAddress1, int i1) throws IOException {
return defaultFactory.createSocket(inetAddress,i, inetAddress1, i1);
}
}
Jsoup 初始化。
Connection conn = Jsoup.connect(url);
conn.sslSocketFactory(new CustomSSLSocketFactory());
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