org.xbill.DNS.TXTRecord Java Examples

/**
 * Query a text record for the given domain from DNS
 * 
 * @param domain the domain to lookup the DNS for a text record
 * @return       the text record content, if found, null otherwise
 */
@SuppressWarnings ("unchecked")
public String queryText (String domain) {
	String		rc = null;
	Record[]	r = query (domain, Type.TXT);
	
	if (r != null) {
		rc = "";
		for (int n = 0; n < r.length; ++n) {
			List <String>	answ = ((TXTRecord) r[n]).getStrings ();
			
			for (int m = 0; m < answ.size (); ++m) {
				String	s = answ.get (m);
				
				if ((s != null) && (s.length () > 0)) {
					rc += s;
				}
			}
		}
	}
	return rc;
}
 

private List<String> parse(Record record) {
  TXTRecord txt = (TXTRecord) record;
  List<String> subnets = new ArrayList<>();

  @SuppressWarnings("unchecked")
  List<String> lines = txt.getStrings();
  for (String line : lines) {
    String[] parts = StringUtils.split(line, " ");
    if (parts.length == 2) {
      if (log.isDebugEnabled()) {
        log.debug("Add Google resolver IP range: " + parts[0]);
      }
      subnets.add(parts[0]);
    }
  }

  if (subnets.isEmpty()) {
    log.error("No Google resolver addresses found");
  }

  return subnets;
}
 

@Override
public Collection<String> findTXTRecords(String hostname) {
    TimeMetric timeMetric = metricFactory.timer("findTXTRecords");
    List<String> txtR = new ArrayList<>();
    Record[] records = lookupNoException(hostname, Type.TXT, "TXT");

    try {
        if (records != null) {
            for (Record record : records) {
                TXTRecord txt = (TXTRecord) record;
                txtR.add(txt.rdataToString());
            }

        }
        return txtR;
    } finally {
        timeMetric.stopAndPublish();
    }
}
 

private String concatenateTxtRecordValues(Record[] records) {
    if (records == null || records.length == 0)
        return null;
    StringBuilder builder = new StringBuilder();
    for (Record record : records) {
        TXTRecord txtRecord = (TXTRecord) record;
        if (builder.length() != 0)
            builder.append(EOL);
        for (Object string : txtRecord.getStrings()) {
            if (builder.length() != 0)
                builder.append(EOL);
            builder.append(string);
        }
    }
    return builder.toString();
}
 

@Override
protected Boolean doInBackground(String... args) {
    //main();
    if (args.length != 1) return false;
    String name = args[0];
    if ((name == null) || (name.isEmpty()))
        return false; //pointless trying to lookup nothing
    Timber.d("Resolving %s", name);
    try {
        SimpleResolver sr = new SimpleResolver(DNSSEC_SERVERS[new Random().nextInt(DNSSEC_SERVERS.length)]);
        ValidatingResolver vr = new ValidatingResolver(sr);
        vr.setTimeout(0, DNS_LOOKUP_TIMEOUT);
        vr.loadTrustAnchors(new ByteArrayInputStream(ROOT.getBytes("ASCII")));
        Record qr = Record.newRecord(Name.fromConstantString(name + "."), Type.TXT, DClass.IN);
        Message response = vr.send(Message.newQuery(qr));
        final int rcode = response.getRcode();
        if (rcode != Rcode.NOERROR) {
            Timber.i("Rcode: %s", Rcode.string(rcode));
            for (RRset set : response.getSectionRRsets(Section.ADDITIONAL)) {
                if (set.getName().equals(Name.root) && set.getType() == Type.TXT
                        && set.getDClass() == ValidatingResolver.VALIDATION_REASON_QCLASS) {
                    Timber.i("Reason:  %s", ((TXTRecord) set.first()).getStrings().get(0));
                }
            }
            return false;
        } else {
            dnssec = response.getHeader().getFlag(Flags.AD);
            for (Record record : response.getSectionArray(Section.ANSWER)) {
                if (record.getType() == Type.TXT) {
                    txts.addAll(((TXTRecord) record).getStrings());
                }
            }
        }
    } catch (IOException | IllegalArgumentException ex) {
        return false;
    }
    return true;
}
 

public static Long getASN(final InetAddress adr)
{
    try
    {
        final Name postfix;
        if (adr instanceof Inet6Address)
            postfix = Name.fromConstantString("origin6.asn.cymru.com");
        else
            postfix = Name.fromConstantString("origin.asn.cymru.com");
        
        final Name name = getReverseIPName(adr, postfix);
        System.out.println("lookup: " + name);
        
        final Lookup lookup = new Lookup(name, Type.TXT);
        lookup.setResolver(new SimpleResolver());
        lookup.setCache(null);
        final Record[] records = lookup.run();
        if (lookup.getResult() == Lookup.SUCCESSFUL)
            for (final Record record : records)
                if (record instanceof TXTRecord)
                {
                    final TXTRecord txt = (TXTRecord) record;
                    @SuppressWarnings("unchecked")
                    final List<String> strings = txt.getStrings();
                    if (strings != null && !strings.isEmpty())
                    {
                        final String result = strings.get(0);
                        final String[] parts = result.split(" ?\\| ?");
                        if (parts != null && parts.length >= 1)
                            return new Long(parts[0]);
                    }
                }
    }
    catch (final Exception e)
    {
    }
    return null;
}
 

public static String getASName(final long asn)
{
    try
    {
        final Name postfix = Name.fromConstantString("asn.cymru.com.");
        final Name name = new Name(String.format("AS%d", asn), postfix);
        System.out.println("lookup: " + name);
        
        final Lookup lookup = new Lookup(name, Type.TXT);
        lookup.setResolver(new SimpleResolver());
        lookup.setCache(null);
        final Record[] records = lookup.run();
        if (lookup.getResult() == Lookup.SUCCESSFUL)
            for (final Record record : records)
                if (record instanceof TXTRecord)
                {
                    final TXTRecord txt = (TXTRecord) record;
                    @SuppressWarnings("unchecked")
                    final List<String> strings = txt.getStrings();
                    if (strings != null && !strings.isEmpty())
                    {
                        System.out.println(strings);
                        
                        final String result = strings.get(0);
                        final String[] parts = result.split(" ?\\| ?");
                        if (parts != null && parts.length >= 1)
                            return parts[4];
                    }
                }
    }
    catch (final Exception e)
    {
    }
    return null;
}
 

public static String getAScountry(final long asn)
{
    try
    {
        final Name postfix = Name.fromConstantString("asn.cymru.com.");
        final Name name = new Name(String.format("AS%d", asn), postfix);
        System.out.println("lookup: " + name);
        
        final Lookup lookup = new Lookup(name, Type.TXT);
        lookup.setResolver(new SimpleResolver());
        lookup.setCache(null);
        final Record[] records = lookup.run();
        if (lookup.getResult() == Lookup.SUCCESSFUL)
            for (final Record record : records)
                if (record instanceof TXTRecord)
                {
                    final TXTRecord txt = (TXTRecord) record;
                    @SuppressWarnings("unchecked")
                    final List<String> strings = txt.getStrings();
                    if (strings != null && !strings.isEmpty())
                    {
                        final String result = strings.get(0);
                        final String[] parts = result.split(" ?\\| ?");
                        if (parts != null && parts.length >= 1)
                            return parts[1];
                    }
                }
    }
    catch (final Exception e)
    {
    }
    return null;
}
 

/**
 * Adapted from https://code.google.com/p/asmack/source/browse/src/custom/org/jivesoftware/smack/util/DNSUtil.java
 * 
 * @param domain
 * @return
 * @throws TextParseException
 */
@SuppressWarnings("unchecked")
private static String resolveAPITXT(String domain) throws TextParseException {
	Lookup lookup = new Lookup(TXT_PREFIX + domain, Type.TXT);
	Record recs[] = lookup.run();
	if (recs == null) {
		throw new RuntimeException("Could not lookup domain.");
	}

	Map<String, String> stringMap = null;
	for (Record rec : recs) {
		String rData = rec.rdataToString().replaceAll("\"", "");
		List<String> rDataTokens = Arrays.asList(rData.split("\\s+"));
		TXTRecord record = new TXTRecord(rec.getName(), rec.getDClass(), 
				rec.getTTL(), rDataTokens);
		List<String> strings = record.getStrings();
		if (strings != null && strings.size() > 0) {
			stringMap = parseStrings(strings);
			break;
		}
	}

	if (stringMap == null) {
		throw new RuntimeException("Domain has no TXT records for buddycloud.");
	}

	String host = stringMap.get("host");
	String protocol = stringMap.get("protocol");
	String path = stringMap.get("path");
	String port = stringMap.get("port");

	path = path == null || path.equals("/") ? "" : path;
	port = port == null ? "" : port;

	return protocol + "://" + host + ":" + port + path;
}
 

public static TXTRecord getTXTRecord(String hostName) {
    return null;
}
 

public TXTRecord getTXTRecord(String hostName) {
    return null;
}