给定域，使用JAVA或PYTHON查找其主机提供商

Question

给定域，你如何查找它的主机提供商。我以前在Java中做过I的nslookup，但是有没有办法也能得到主机提供商呢？谢谢

Answer 1

试试这个：

import java.net.InetAddress;
import java.net.UnknownHostException;
import org.xbill.DNS.ExtendedResolver;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.Name;
import org.xbill.DNS.PTRRecord;
import org.xbill.DNS.Record;
import org.xbill.DNS.Resolver;
import org.xbill.DNS.ReverseMap;
import org.xbill.DNS.Type;

public class FindDomain {

 public static void main(String[] args) {
   try {
    InetAddress address = InetAddress.getLocalHost();
    System.out.println("LOCAL ADDRESS : " + address.getHostAddress());
    System.out.println("LOCAL HOST : " + address.getHostName());

    InetAddress ipAddress = java.net.InetAddress.getByName("www.javadiscover.com");
    String ip = ipAddress.getHostAddress();
    System.out.println("\nJAVADISCOVER IP : " + ip);

    final InetAddress ip2 = InetAddress.getByName("74.125.135.121");
    final byte[] bytes = ip2.getAddress();
    final String host = getHostByIPAddress(bytes);
    System.out.println("\nJAVADISCOVER HOST : " + host);

   } catch (UnknownHostException e) {
    System.out.println("Host NOT Avaialble");
   }

  }

  public static String getHostByIPAddress(byte[] addr) throws UnknownHostException {

   Name name = ReverseMap.fromAddress(InetAddress.getByAddress(addr));

   // OPEN DNS SERVERS
   final String[] openDNS = new String[] {"208.67.222.222", "208.67.220.220"};
   final Resolver resolver = new ExtendedResolver(openDNS);
   final Lookup lookUp = new Lookup(name, Type.PTR);
   lookUp.setResolver(resolver);
   Record[] records = lookUp.run();
   if (records == null) {
    throw new UnknownHostException();
   }
   return ((PTRRecord) records[0]).getTarget().toString();
  }
}

输出

LOCAL ADDRESS : 10.70.50.16
LOCAL HOST : anandkumar-inl

IP : 74.125.135.121

HOST : ni-in-f121.1e100.net.

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