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// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "FileSink.h"
#include "FileSystem.h"
namespace Net {
Task::State FileSink::init(QNetworkRequest& request)
{
auto result = initCache(request);
if (result != Task::State::Running) {
return result;
}
// create a new save file and open it for writing
if (!FS::ensureFilePathExists(m_filename)) {
qCritical() << "Could not create folder for " + m_filename;
return Task::State::Failed;
}
wroteAnyData = false;
m_output_file.reset(new QSaveFile(m_filename));
if (!m_output_file->open(QIODevice::WriteOnly)) {
qCritical() << "Could not open " + m_filename + " for writing";
return Task::State::Failed;
}
if (initAllValidators(request))
return Task::State::Running;
return Task::State::Failed;
}
Task::State FileSink::write(QByteArray& data)
{
if (!writeAllValidators(data) || m_output_file->write(data) != data.size()) {
qCritical() << "Failed writing into " + m_filename;
m_output_file->cancelWriting();
m_output_file.reset();
wroteAnyData = false;
return Task::State::Failed;
}
wroteAnyData = true;
return Task::State::Running;
}
Task::State FileSink::abort()
{
m_output_file->cancelWriting();
failAllValidators();
return Task::State::Failed;
}
Task::State FileSink::finalize(QNetworkReply& reply)
{
bool gotFile = false;
QVariant statusCodeV = reply.attribute(QNetworkRequest::HttpStatusCodeAttribute);
bool validStatus = false;
int statusCode = statusCodeV.toInt(&validStatus);
if (validStatus) {
// this leaves out 304 Not Modified
gotFile = statusCode == 200 || statusCode == 203;
}
// if we wrote any data to the save file, we try to commit the data to the real file.
// if it actually got a proper file, we write it even if it was empty
if (gotFile || wroteAnyData) {
// ask validators for data consistency
// we only do this for actual downloads, not 'your data is still the same' cache hits
if (!finalizeAllValidators(reply))
return Task::State::Failed;
// nothing went wrong...
if (!m_output_file->commit()) {
qCritical() << "Failed to commit changes to " << m_filename;
m_output_file->cancelWriting();
return Task::State::Failed;
}
}
// then get rid of the save file
m_output_file.reset();
return finalizeCache(reply);
}
Task::State FileSink::initCache(QNetworkRequest&)
{
return Task::State::Running;
}
Task::State FileSink::finalizeCache(QNetworkReply&)
{
return Task::State::Succeeded;
}
bool FileSink::hasLocalData()
{
QFileInfo info(m_filename);
return info.exists() && info.size() != 0;
}
} // namespace Net
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