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/* Copyright 2013-2015 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 "Download.h"
#include <QFileInfo>
#include <QDateTime>
#include <QDebug>
#include "Env.h"
#include <FileSystem.h>
#include "ChecksumValidator.h"
#include "MetaCacheSink.h"
#include "ByteArraySink.h"
namespace Net {
Download::Download():NetAction()
{
m_status = Job_NotStarted;
}
Download::Ptr Download::makeCached(QUrl url, MetaEntryPtr entry)
{
Download * dl = new Download();
dl->m_url = url;
auto md5Node = new ChecksumValidator(QCryptographicHash::Md5);
auto cachedNode = new MetaCacheSink(entry, md5Node);
dl->m_sink.reset(cachedNode);
dl->m_target_path = entry->getFullPath();
return std::shared_ptr<Download>(dl);
}
Download::Ptr Download::makeByteArray(QUrl url, QByteArray *output)
{
Download * dl = new Download();
dl->m_url = url;
dl->m_sink.reset(new ByteArraySink(output));
return std::shared_ptr<Download>(dl);
}
Download::Ptr Download::makeFile(QUrl url, QString path)
{
Download * dl = new Download();
dl->m_url = url;
dl->m_sink.reset(new FileSink(path));
return std::shared_ptr<Download>(dl);
}
void Download::addValidator(Validator * v)
{
m_sink->addValidator(v);
}
void Download::start()
{
if(m_status == Job_Aborted)
{
qWarning() << "Attempt to start an aborted Download:" << m_url.toString();
emit aborted(m_index_within_job);
return;
}
QNetworkRequest request(m_url);
m_status = m_sink->init(request);
switch(m_status)
{
case Job_Finished:
emit succeeded(m_index_within_job);
qDebug() << "Download cache hit " << m_url.toString();
return;
case Job_InProgress:
qDebug() << "Downloading " << m_url.toString();
break;
case Job_NotStarted:
case Job_Failed:
emit failed(m_index_within_job);
return;
case Job_Aborted:
return;
}
request.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0");
auto worker = ENV.qnam();
QNetworkReply *rep = worker->get(request);
m_reply.reset(rep);
connect(rep, SIGNAL(downloadProgress(qint64, qint64)), SLOT(downloadProgress(qint64, qint64)));
connect(rep, SIGNAL(finished()), SLOT(downloadFinished()));
connect(rep, SIGNAL(error(QNetworkReply::NetworkError)), SLOT(downloadError(QNetworkReply::NetworkError)));
connect(rep, SIGNAL(readyRead()), SLOT(downloadReadyRead()));
}
void Download::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
m_total_progress = bytesTotal;
m_progress = bytesReceived;
emit netActionProgress(m_index_within_job, bytesReceived, bytesTotal);
}
void Download::downloadError(QNetworkReply::NetworkError error)
{
if(error == QNetworkReply::OperationCanceledError)
{
qCritical() << "Aborted " << m_url.toString();
m_status = Job_Aborted;
}
else
{
// error happened during download.
qCritical() << "Failed " << m_url.toString() << " with reason " << error;
m_status = Job_Failed;
}
}
bool Download::handleRedirect()
{
QVariant redirect = m_reply->header(QNetworkRequest::LocationHeader);
QString redirectURL;
if(redirect.isValid())
{
redirectURL = redirect.toString();
}
// FIXME: This is a hack for https://bugreports.qt-project.org/browse/QTBUG-41061
else if(m_reply->hasRawHeader("Location"))
{
auto data = m_reply->rawHeader("Location");
if(data.size() > 2 && data[0] == '/' && data[1] == '/')
{
redirectURL = m_reply->url().scheme() + ":" + data;
}
}
if (!redirectURL.isEmpty())
{
m_url = QUrl(redirect.toString());
qDebug() << "Following redirect to " << m_url.toString();
start();
return true;
}
return false;
}
void Download::downloadFinished()
{
// handle HTTP redirection first
if(handleRedirect())
{
qDebug() << "Download redirected:" << m_url.toString();
return;
}
// if the download failed before this point ...
if (m_status == Job_Failed)
{
qDebug() << "Download failed in previous step:" << m_url.toString();
m_sink->abort();
m_reply.reset();
emit failed(m_index_within_job);
return;
}
else if(m_status == Job_Aborted)
{
qDebug() << "Download aborted in previous step:" << m_url.toString();
m_sink->abort();
m_reply.reset();
emit aborted(m_index_within_job);
return;
}
// make sure we got all the remaining data, if any
auto data = m_reply->readAll();
if(data.size())
{
qDebug() << "Writing extra" << data.size() << "bytes to" << m_target_path;
m_status = m_sink->write(data);
}
// otherwise, finalize the whole graph
m_status = m_sink->finalize(*m_reply.get());
if (m_status != Job_Finished)
{
qDebug() << "Download failed to finalize:" << m_url.toString();
m_sink->abort();
m_reply.reset();
emit failed(m_index_within_job);
return;
}
m_reply.reset();
qDebug() << "Download succeeded:" << m_url.toString();
emit succeeded(m_index_within_job);
}
void Download::downloadReadyRead()
{
if(m_status == Job_InProgress)
{
auto data = m_reply->readAll();
m_status = m_sink->write(data);
if(m_status == Job_Failed)
{
qCritical() << "Failed to process response chunk for " << m_target_path;
}
// qDebug() << "Download" << m_url.toString() << "gained" << data.size() << "bytes";
}
else
{
qCritical() << "Cannot write to " << m_target_path << ", illegal status" << m_status;
}
}
}
bool Net::Download::abort()
{
if(m_reply)
{
m_reply->abort();
}
else
{
m_status = Job_Aborted;
}
return true;
}
bool Net::Download::canAbort()
{
return true;
}
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