123 lines
3.1 KiB
C++
123 lines
3.1 KiB
C++
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#include "MultiMC.h"
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#include "CacheDownload.h"
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#include <pathutils.h>
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#include <QCryptographicHash>
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#include <QFileInfo>
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#include <QDateTime>
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#include <QDebug>
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CacheDownload::CacheDownload (QUrl url, MetaEntryPtr entry )
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:Download(), md5sum(QCryptographicHash::Md5)
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{
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m_url = url;
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m_entry = entry;
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m_target_path = entry->getFullPath();
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m_status = Job_NotStarted;
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m_opened_for_saving = false;
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}
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void CacheDownload::start()
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{
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if(!m_entry->stale)
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{
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emit succeeded(index_within_job);
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return;
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}
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m_output_file.setFileName(m_target_path);
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// if there already is a file and md5 checking is in effect and it can be opened
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if(!ensureFilePathExists(m_target_path))
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{
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emit failed(index_within_job);
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return;
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}
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qDebug() << "Downloading " << m_url.toString();
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QNetworkRequest request ( m_url );
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request.setRawHeader(QString("If-None-Match").toLatin1(), m_entry->etag.toLatin1());
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auto worker = MMC->qnam();
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QNetworkReply * rep = worker->get ( request );
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m_reply = QSharedPointer<QNetworkReply> ( rep, &QObject::deleteLater );
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connect ( rep, SIGNAL ( downloadProgress ( qint64,qint64 ) ), SLOT ( downloadProgress ( qint64,qint64 ) ) );
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connect ( rep, SIGNAL ( finished() ), SLOT ( downloadFinished() ) );
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connect ( rep, SIGNAL ( error ( QNetworkReply::NetworkError ) ), SLOT ( downloadError ( QNetworkReply::NetworkError ) ) );
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connect ( rep, SIGNAL ( readyRead() ), SLOT ( downloadReadyRead() ) );
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}
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void CacheDownload::downloadProgress ( qint64 bytesReceived, qint64 bytesTotal )
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{
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emit progress (index_within_job, bytesReceived, bytesTotal );
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}
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void CacheDownload::downloadError ( QNetworkReply::NetworkError error )
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{
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// error happened during download.
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// TODO: log the reason why
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m_status = Job_Failed;
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}
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void CacheDownload::downloadFinished()
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{
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// if the download succeeded
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if ( m_status != Job_Failed )
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{
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// nothing went wrong...
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m_status = Job_Finished;
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if(m_opened_for_saving)
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{
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// save the data to the downloadable if we aren't saving to file
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m_output_file.close();
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m_entry->md5sum = md5sum.result().toHex().constData();
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}
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else
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{
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if ( m_output_file.open ( QIODevice::ReadOnly ) )
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{
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m_entry->md5sum = QCryptographicHash::hash ( m_output_file.readAll(), QCryptographicHash::Md5 ).toHex().constData();
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m_output_file.close();
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}
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}
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QFileInfo output_file_info(m_target_path);
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m_entry->etag = m_reply->rawHeader("ETag").constData();
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m_entry->last_changed_timestamp = output_file_info.lastModified().toUTC().toMSecsSinceEpoch();
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m_entry->stale = false;
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MMC->metacache()->updateEntry(m_entry);
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m_reply.clear();
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emit succeeded(index_within_job);
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return;
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}
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// else the download failed
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else
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{
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m_output_file.close();
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m_output_file.remove();
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m_reply.clear();
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emit failed(index_within_job);
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return;
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}
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}
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void CacheDownload::downloadReadyRead()
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{
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if(!m_opened_for_saving)
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{
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if ( !m_output_file.open ( QIODevice::WriteOnly ) )
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{
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/*
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* Can't open the file... the job failed
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*/
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m_reply->abort();
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emit failed(index_within_job);
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return;
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}
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m_opened_for_saving = true;
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}
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QByteArray ba = m_reply->readAll();
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md5sum.addData(ba);
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m_output_file.write ( ba );
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}
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