use of io.netty.handler.codec.dns.DefaultDnsQuestion in project vert.x by eclipse.
the class DnsClientImpl method lookup.
@SuppressWarnings("unchecked")
private <T> void lookup(String name, Future<List<T>> result, DnsRecordType... types) {
Objects.requireNonNull(name, "no null name accepted");
bootstrap.connect(dnsServer).addListener(new RetryChannelFutureListener(result) {
@Override
public void onSuccess(ChannelFuture future) throws Exception {
DatagramDnsQuery query = new DatagramDnsQuery(null, dnsServer, ThreadLocalRandom.current().nextInt());
for (DnsRecordType type : types) {
query.addRecord(DnsSection.QUESTION, new DefaultDnsQuestion(name, type, DnsRecord.CLASS_IN));
}
future.channel().writeAndFlush(query).addListener(new RetryChannelFutureListener(result) {
@Override
public void onSuccess(ChannelFuture future) throws Exception {
future.channel().pipeline().addLast(new SimpleChannelInboundHandler<DnsResponse>() {
@Override
protected void channelRead0(ChannelHandlerContext ctx, DnsResponse msg) throws Exception {
DnsResponseCode code = DnsResponseCode.valueOf(msg.code().intValue());
if (code == DnsResponseCode.NOERROR) {
int count = msg.count(DnsSection.ANSWER);
List<T> records = new ArrayList<>(count);
for (int idx = 0; idx < count; idx++) {
DnsRecord a = msg.recordAt(DnsSection.ANSWER, idx);
T record = RecordDecoder.decode(a);
if (isRequestedType(a.type(), types)) {
records.add(record);
}
}
if (records.size() > 0 && (records.get(0) instanceof MxRecordImpl || records.get(0) instanceof SrvRecordImpl)) {
Collections.sort((List) records);
}
setResult(result, records);
} else {
setFailure(result, new DnsException(code));
}
ctx.close();
}
private boolean isRequestedType(DnsRecordType dnsRecordType, DnsRecordType[] types) {
for (DnsRecordType t : types) {
if (t.equals(dnsRecordType)) {
return true;
}
}
return false;
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
setFailure(result, cause);
ctx.close();
}
});
}
});
}
});
}
use of io.netty.handler.codec.dns.DefaultDnsQuestion in project netty by netty.
the class DnsNameResolverContext method query.
private boolean query(String hostname, DnsRecordType type, DnsServerAddressStream nextAddr, Promise<T> promise) {
final DnsQuestion question;
try {
question = new DefaultDnsQuestion(hostname, type);
} catch (IllegalArgumentException e) {
// java.net.IDN.toASCII(...) may throw an IllegalArgumentException if it fails to parse the hostname
promise.tryFailure(e);
return false;
}
query(nextAddr, question, promise);
return true;
}
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