001/**
002 *
003 * Copyright 2019-2024 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.dox.element;
018
019import java.io.IOException;
020import java.nio.ByteBuffer;
021
022import org.jivesoftware.smack.packet.IQ;
023import org.jivesoftware.smack.util.stringencoder.Base64;
024
025import org.jxmpp.jid.Jid;
026import org.minidns.dnsmessage.DnsMessage;
027
028public class DnsIq extends IQ {
029
030    public static final String ELEMENT = "dns";
031    public static final String NAMESPACE = "urn:xmpp:dox:0";
032
033    private final DnsMessage dnsMessage;
034
035    private String base64DnsMessage;
036
037    public DnsIq(String base64DnsMessage) throws IOException {
038        this(Base64.decode(base64DnsMessage));
039        this.base64DnsMessage = base64DnsMessage;
040    }
041
042    public DnsIq(byte[] dnsMessage) throws IOException {
043        this(new DnsMessage(dnsMessage));
044    }
045
046    @SuppressWarnings("this-escape")
047    public DnsIq(DnsMessage dnsQuery, Jid to) {
048        this(dnsQuery);
049        setTo(to);
050        setType(Type.get);
051    }
052
053    public DnsIq(DnsMessage dnsMessage) {
054        super(ELEMENT, NAMESPACE);
055        this.dnsMessage = dnsMessage;
056    }
057
058    public DnsMessage getDnsMessage() {
059        return dnsMessage;
060    }
061
062    @SuppressWarnings("ByteBufferBackingArray")
063    public String getDnsMessageBase64Encoded() {
064        if (base64DnsMessage == null) {
065            ByteBuffer byteBuffer = dnsMessage.getInByteBuffer();
066            byte[] bytes = byteBuffer.array();
067            base64DnsMessage = Base64.encodeToStringWithoutPadding(bytes);
068        }
069        return base64DnsMessage;
070    }
071
072    @Override
073    protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
074        xml.rightAngleBracket();
075
076        xml.escape(getDnsMessageBase64Encoded());
077
078        return xml;
079    }
080
081}