/**
* Selects an appropriate stream negotiator after examining the incoming file transfer request.
*
* @param request The related file transfer request.
* @return The file transfer object that handles the transfer
* @throws XMPPException If there are either no stream methods contained in the packet, or there
* is not an appropriate stream method.
*/
public StreamNegotiator selectStreamNegotiator(FileTransferRequest request) throws XMPPException {
final StreamInitiation si = request.getStreamInitiation();
final FormField streamMethodField = getStreamMethodField(si.getFeatureNegotiationForm());
if (streamMethodField == null) {
final String errorMessage = "No stream methods contained in packet.";
final XMPPError error = new XMPPError(XMPPError.Condition.bad_request, errorMessage);
final IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(), IQ.Type.ERROR);
iqPacket.setError(error);
connection.sendPacket(iqPacket);
throw new XMPPException(errorMessage, error);
}
// select the appropriate protocol
StreamNegotiator selectedStreamNegotiator;
try {
selectedStreamNegotiator = getNegotiator(streamMethodField);
} catch (final XMPPException e) {
final IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(), IQ.Type.ERROR);
iqPacket.setError(e.getXMPPError());
connection.sendPacket(iqPacket);
throw e;
}
// return the appropriate negotiator
return selectedStreamNegotiator;
}
protected void rejectIncomingFileTransfer(FileTransferRequest request) {
StreamInitiation initiation = request.getStreamInitiation();
IQ rejection =
FileTransferNegotiator.createIQ(
initiation.getPacketID(), initiation.getFrom(), initiation.getTo(), IQ.Type.ERROR);
rejection.setError(new XMPPError(XMPPError.Condition.no_acceptable));
connection.sendPacket(rejection);
}
/**
* Listens for file transfer packets.
*
* @param packet packet to be processed
*/
public void processPacket(Packet packet) {
if (!(packet instanceof StreamInitiation)) return;
if (logger.isDebugEnabled()) logger.debug("Incoming Jabber file transfer request.");
StreamInitiation streamInitiation = (StreamInitiation) packet;
FileTransferRequest jabberRequest = new FileTransferRequest(manager, streamInitiation);
// Create a global incoming file transfer request.
IncomingFileTransferRequestJabberImpl incomingFileTransferRequest =
new IncomingFileTransferRequestJabberImpl(
jabberProvider, OperationSetFileTransferJabberImpl.this, jabberRequest);
// Send a thumbnail request if a thumbnail is advertised in the
// streamInitiation packet.
org.jivesoftware.smackx.packet.StreamInitiation.File file = streamInitiation.getFile();
boolean isThumbnailedFile = false;
if (file instanceof FileElement) {
ThumbnailElement thumbnailElement = ((FileElement) file).getThumbnailElement();
if (thumbnailElement != null) {
isThumbnailedFile = true;
incomingFileTransferRequest.createThumbnailListeners(thumbnailElement.getCid());
ThumbnailIQ thumbnailRequest =
new ThumbnailIQ(
streamInitiation.getTo(),
streamInitiation.getFrom(),
thumbnailElement.getCid(),
IQ.Type.GET);
if (logger.isDebugEnabled())
logger.debug("Sending thumbnail request:" + thumbnailRequest.toXML());
jabberProvider.getConnection().sendPacket(thumbnailRequest);
}
}
if (!isThumbnailedFile) {
// Create an event associated to this global request.
FileTransferRequestEvent fileTransferRequestEvent =
new FileTransferRequestEvent(
OperationSetFileTransferJabberImpl.this, incomingFileTransferRequest, new Date());
// Notify the global listener that a request has arrived.
fireFileTransferRequest(fileTransferRequestEvent);
}
}
/**
* Reject a stream initiation request from a remote user.
*
* @param si The Stream Initiation request to reject.
*/
public void rejectStream(final StreamInitiation si) {
final XMPPError error = new XMPPError(XMPPError.Condition.forbidden, "Offer Declined");
final IQ iqPacket = createIQ(si.getPacketID(), si.getFrom(), si.getTo(), IQ.Type.ERROR);
iqPacket.setError(error);
connection.sendPacket(iqPacket);
}