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/*
* Copyright (c) 2010-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/FileTransfer/IBBSendSession.h>
#include <boost/bind.hpp>
#include <boost/numeric/conversion/cast.hpp>
#include <Swiften/Base/ByteArray.h>
#include <Swiften/FileTransfer/BytestreamException.h>
#include <Swiften/FileTransfer/IBBRequest.h>
#include <Swiften/Queries/IQRouter.h>
namespace Swift {
IBBSendSession::IBBSendSession(
const std::string& id,
const JID& from,
const JID& to,
std::shared_ptr<ReadBytestream> bytestream,
IQRouter* router) :
id(id),
from(from),
to(to),
bytestream(bytestream),
router(router),
blockSize(4096),
sequenceNumber(0),
active(false),
waitingForData(false) {
bytestream->onDataAvailable.connect(boost::bind(&IBBSendSession::handleDataAvailable, this));
}
IBBSendSession::~IBBSendSession() {
bytestream->onDataAvailable.disconnect(boost::bind(&IBBSendSession::handleDataAvailable, this));
}
void IBBSendSession::start() {
IBBRequest::ref request = IBBRequest::create(
from, to, IBB::createIBBOpen(id, boost::numeric_cast<int>(blockSize)), router);
request->onResponse.connect(boost::bind(&IBBSendSession::handleIBBResponse, this, _1, _2));
active = true;
request->send();
currentRequest = request;
}
void IBBSendSession::stop() {
if (active && router->isAvailable()) {
IBBRequest::create(from, to, IBB::createIBBClose(id), router)->send();
}
if (currentRequest) {
currentRequest->onResponse.disconnect(boost::bind(&IBBSendSession::handleIBBResponse, this, _1, _2));
}
finish(boost::optional<FileTransferError>());
}
void IBBSendSession::handleIBBResponse(IBB::ref, ErrorPayload::ref error) {
currentRequest.reset();
if (!error && active) {
if (!bytestream->isFinished()) {
sendMoreData();
}
else {
finish(boost::optional<FileTransferError>());
}
}
else {
finish(FileTransferError(FileTransferError::PeerError));
}
}
void IBBSendSession::sendMoreData() {
try {
std::shared_ptr<ByteArray> data = bytestream->read(blockSize);
if (!data->empty()) {
waitingForData = false;
IBBRequest::ref request = IBBRequest::create(from, to, IBB::createIBBData(id, sequenceNumber, *data), router);
sequenceNumber++;
request->onResponse.connect(boost::bind(&IBBSendSession::handleIBBResponse, this, _1, _2));
request->send();
currentRequest = request;
onBytesSent(data->size());
}
else {
waitingForData = true;
}
}
catch (const BytestreamException&) {
finish(FileTransferError(FileTransferError::ReadError));
}
}
void IBBSendSession::finish(boost::optional<FileTransferError> error) {
active = false;
onFinished(error);
}
void IBBSendSession::handleDataAvailable() {
if (waitingForData) {
sendMoreData();
}
}
}
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Swift