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https://github.com/vanitasvitae/Smack.git
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8526f8ab29
Re-work filetransfer/bytestream stanza toXML() method to use XmlStringBuilder. Move the ELEMENT and NAMESPACE definitions in the right place, ie. the stanza class.
150 lines
5.7 KiB
Java
150 lines
5.7 KiB
Java
/**
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*
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* Copyright 2003-2006 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.filetransfer;
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import java.io.InputStream;
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import java.io.OutputStream;
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import org.jivesoftware.smack.SmackException.NoResponseException;
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import org.jivesoftware.smack.SmackException.NotConnectedException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException.XMPPErrorException;
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import org.jivesoftware.smack.filter.AndFilter;
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import org.jivesoftware.smack.filter.FromMatchesFilter;
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import org.jivesoftware.smack.filter.PacketFilter;
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import org.jivesoftware.smack.filter.PacketTypeFilter;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.Packet;
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import org.jivesoftware.smackx.bytestreams.ibb.InBandBytestreamManager;
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import org.jivesoftware.smackx.bytestreams.ibb.InBandBytestreamRequest;
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import org.jivesoftware.smackx.bytestreams.ibb.InBandBytestreamSession;
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import org.jivesoftware.smackx.bytestreams.ibb.packet.DataPacketExtension;
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import org.jivesoftware.smackx.bytestreams.ibb.packet.Open;
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import org.jivesoftware.smackx.si.packet.StreamInitiation;
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/**
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* The In-Band Bytestream file transfer method, or IBB for short, transfers the
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* file over the same XML Stream used by XMPP. It is the fall-back mechanism in
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* case the SOCKS5 bytestream method of transferring files is not available.
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*
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* @author Alexander Wenckus
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* @author Henning Staib
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* @see <a href="http://xmpp.org/extensions/xep-0047.html">XEP-0047: In-Band
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* Bytestreams (IBB)</a>
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*/
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public class IBBTransferNegotiator extends StreamNegotiator {
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private XMPPConnection connection;
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private InBandBytestreamManager manager;
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/**
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* The default constructor for the In-Band Bytestream Negotiator.
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*
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* @param connection The connection which this negotiator works on.
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*/
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protected IBBTransferNegotiator(XMPPConnection connection) {
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this.connection = connection;
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this.manager = InBandBytestreamManager.getByteStreamManager(connection);
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}
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public OutputStream createOutgoingStream(String streamID, String initiator,
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String target) throws NoResponseException, XMPPErrorException, NotConnectedException {
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InBandBytestreamSession session = this.manager.establishSession(target, streamID);
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session.setCloseBothStreamsEnabled(true);
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return session.getOutputStream();
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}
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public InputStream createIncomingStream(StreamInitiation initiation)
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throws NoResponseException, XMPPErrorException, NotConnectedException {
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/*
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* In-Band Bytestream initiation listener must ignore next in-band bytestream request with
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* given session ID
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*/
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this.manager.ignoreBytestreamRequestOnce(initiation.getSessionID());
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Packet streamInitiation = initiateIncomingStream(this.connection, initiation);
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return negotiateIncomingStream(streamInitiation);
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}
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public PacketFilter getInitiationPacketFilter(String from, String streamID) {
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/*
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* this method is always called prior to #negotiateIncomingStream() so
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* the In-Band Bytestream initiation listener must ignore the next
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* In-Band Bytestream request with the given session ID
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*/
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this.manager.ignoreBytestreamRequestOnce(streamID);
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return new AndFilter(FromMatchesFilter.create(from), new IBBOpenSidFilter(streamID));
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}
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public String[] getNamespaces() {
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return new String[] { DataPacketExtension.NAMESPACE };
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}
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InputStream negotiateIncomingStream(Packet streamInitiation) throws NotConnectedException {
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// build In-Band Bytestream request
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InBandBytestreamRequest request = new ByteStreamRequest(this.manager,
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(Open) streamInitiation);
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// always accept the request
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InBandBytestreamSession session = request.accept();
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session.setCloseBothStreamsEnabled(true);
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return session.getInputStream();
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}
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/**
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* This PacketFilter accepts an incoming In-Band Bytestream open request
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* with a specified session ID.
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*/
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private static class IBBOpenSidFilter extends PacketTypeFilter {
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private String sessionID;
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public IBBOpenSidFilter(String sessionID) {
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super(Open.class);
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if (sessionID == null) {
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throw new IllegalArgumentException("StreamID cannot be null");
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}
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this.sessionID = sessionID;
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}
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public boolean accept(Packet packet) {
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if (super.accept(packet)) {
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Open bytestream = (Open) packet;
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// packet must by of type SET and contains the given session ID
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return this.sessionID.equals(bytestream.getSessionID())
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&& IQ.Type.set.equals(bytestream.getType());
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}
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return false;
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}
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}
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/**
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* Derive from InBandBytestreamRequest to access protected constructor.
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*/
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private static class ByteStreamRequest extends InBandBytestreamRequest {
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private ByteStreamRequest(InBandBytestreamManager manager, Open byteStreamRequest) {
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super(manager, byteStreamRequest);
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}
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}
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}
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