Java Code Examples for org.xbill.DNS.Lookup#setCache()
The following examples show how to use
org.xbill.DNS.Lookup#setCache() .
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Example 1
| Source File: GoogleResolverCheck.java From entrada with GNU General Public License v3.0 | 7 votes |
|
@Override
protected List<String> fetch() {
try {
Resolver resolver = new SimpleResolver();
// dns resolvers may take a long time to return a response.
resolver.setTimeout(timeout);
Lookup l =
new Lookup(StringUtils.endsWith(hostname, ".") ? hostname : hostname + ".", Type.TXT);
// always make sure the cache is empty
l.setCache(new Cache());
l.setResolver(resolver);
Record[] records = l.run();
if (records != null && records.length > 0) {
return parse(records[0]);
}
} catch (Exception e) {
log.error("Problem while adding Google resolvers, continue without", e);
}
log.error("No Google resolver addresses found");
return Collections.emptyList();
}
Example 2
| Source File: Helperfunctions.java From open-rmbt with Apache License 2.0 | 6 votes |
|
public static String reverseDNSLookup(final InetAddress adr)
{
try
{
final Name name = ReverseMap.fromAddress(adr);
final Lookup lookup = new Lookup(name, Type.PTR);
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 PTRRecord)
{
final PTRRecord ptr = (PTRRecord) record;
return ptr.getTarget().toString();
}
}
catch (final Exception e)
{
}
return null;
}
Example 3
| Source File: DNSJavaService.java From james-project with Apache License 2.0 | 5 votes |
|
/**
* Looks up DNS records of the specified type for the specified name.
* <p/>
* This method is a public wrapper for the private implementation method
*
* @param namestr the name of the host to be looked up
* @param type the type of record desired
* @param typeDesc the description of the record type, for debugging purpose
*/
protected Record[] lookup(String namestr, int type, String typeDesc) throws TemporaryResolutionException {
// Name name = null;
try {
// name = Name.fromString(namestr, Name.root);
Lookup l = new Lookup(namestr, type);
l.setCache(cache);
l.setResolver(resolver);
l.setCredibility(dnsCredibility);
l.setSearchPath(searchPaths);
Record[] r = l.run();
try {
if (l.getResult() == Lookup.TRY_AGAIN) {
throw new TemporaryResolutionException("DNSService is temporary not reachable");
} else {
return r;
}
} catch (IllegalStateException ise) {
// This is okay, because it mimics the original behaviour
// TODO find out if it's a bug in DNSJava
LOGGER.warn("Error determining result ", ise);
throw new TemporaryResolutionException("DNSService is temporary not reachable");
}
// return rawDNSLookup(name, false, type, typeDesc);
} catch (TextParseException tpe) {
// TODO: Figure out how to handle this correctly.
LOGGER.error("Couldn't parse name {}", namestr, tpe);
return null;
}
}
Example 4
| Source File: Helperfunctions.java From open-rmbt with Apache License 2.0 | 5 votes |
|
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;
}
Example 5
| Source File: Helperfunctions.java From open-rmbt with Apache License 2.0 | 5 votes |
|
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;
}
Example 6
| Source File: Helperfunctions.java From open-rmbt with Apache License 2.0 | 5 votes |
|
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;
}
