import org.apache.commons.net.whois.WhoisClient; //导入依赖的package包/类
@Override
public Domain getDomainImpl(DomainName domainName) throws RDAPError {
  try {
    String tld = domainName.getTLDLabel().getStringValue();
    WhoisClient whoisClient = new WhoisClient();
    whoisClient.setDefaultTimeout(10000);
    whoisClient.setConnectTimeout(5000);
    whoisClient.connect("whois.nic." + tld, 43);
    whoisClient.setSoTimeout(10000);
    String query = domainName.getStringValue();
    String whoisData = whoisClient.query(query);
    if (StringUtils.strip(whoisData).startsWith(QUOTA_EXCEEDED)) {
      throw new QuotaReachedError();
    }
    if (StringUtils.strip(whoisData).startsWith(NO_MATCH)) {
      return null;
    }
    if (StringUtils.strip(whoisData).startsWith(DOMAIN_NOT_FOUND)) {
      return null;
    }
    WhoisDomainParser parser = new WhoisDomainParser();
    WhoisDomain whoisDomain = parser.parse(whoisData);
    if (whoisDomain == null || whoisDomain.domain == null || StringUtils.isEmpty(whoisDomain.domain.uLabel)) {
      throw new InternalServerError("Unrecognized result");
    }
    return convert(whoisDomain, tld);
  } catch (IOException e) {
    throw new InternalServerError(e.getMessage());
  }
}
 

import org.apache.commons.net.whois.WhoisClient; //导入依赖的package包/类
private WhoisRegistrar getRegistrar(String tld, String registrar) throws RDAPError {
  try {
    WhoisClient whoisClient = new WhoisClient();
    whoisClient.setDefaultTimeout(10000);
    whoisClient.setConnectTimeout(5000);
    whoisClient.connect("whois.nic." + tld, 43);
    whoisClient.setSoTimeout(10000);
    String query = "registrar " + registrar;
    String whoisData = whoisClient.query(query);
    if (StringUtils.strip(whoisData).startsWith(QUOTA_EXCEEDED)) {
      throw new QuotaReachedError();
    }
    if (StringUtils.strip(whoisData).startsWith(NO_MATCH)) {
      return null;
    }
    WhoisRegistrarListParser parser = new WhoisRegistrarListParser();
    List<WhoisRegistrar> results = parser.parseResult(whoisData);
    for (Iterator<WhoisRegistrar> iterator = results.iterator(); iterator.hasNext(); ) {
      WhoisRegistrar whoisRegistrar = iterator.next();
      if (!whoisRegistrar.name.equals(registrar)) {
        iterator.remove();
      }
    }
    if (results.isEmpty()) {
      return null;
    }
    return results.iterator().next();
  } catch (IOException e) {
    throw new InternalServerError(e.getMessage());
  }
}
 

import org.apache.commons.net.whois.WhoisClient; //导入依赖的package包/类
private WhoisHost getHost(String tld, String host) throws RDAPError {
  try {
    WhoisClient whoisClient = new WhoisClient();
    whoisClient.setDefaultTimeout(10000);
    whoisClient.setConnectTimeout(5000);
    whoisClient.connect("whois.nic." + tld, 43);
    whoisClient.setSoTimeout(10000);
    String query = "nameserver " + host;
    String whoisData = whoisClient.query(query);
    if (StringUtils.strip(whoisData).startsWith(QUOTA_EXCEEDED)) {
      throw new QuotaReachedError();
    }
    if (StringUtils.strip(whoisData).startsWith(NO_MATCH)) {
      return null;
    }
    WhoisHostListParser parser = new WhoisHostListParser();
    List<WhoisHost> results = parser.parseResult(whoisData);
    for (Iterator<WhoisHost> iterator = results.iterator(); iterator.hasNext(); ) {
      WhoisHost whoisHost = iterator.next();
      if (!whoisHost.name.equals(host)) {
        iterator.remove();
      }
    }
    if (results.isEmpty()) {
      return null;
    }
    return results.iterator().next();
  } catch (IOException e) {
    throw new InternalServerError(e.getMessage());
  }
}
 

import org.apache.commons.net.whois.WhoisClient; //导入依赖的package包/类
public NetnameUpdater(TypedProperties props) {
    this.props = props;
    this.whoisClient = new WhoisClient();
    this.matcher = Pattern.compile(NETNAME_REG_EXP, Pattern.MULTILINE).matcher("");
}