139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
#include "DownloadJob.h"
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#include "pathutils.h"
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#include "NetWorker.h"
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DownloadJob::DownloadJob (QUrl url,
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QString target_path,
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QString expected_md5 )
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:Job()
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{
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m_url = url;
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m_target_path = target_path;
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m_expected_md5 = expected_md5;
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m_check_md5 = m_expected_md5.size();
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m_save_to_file = m_target_path.size();
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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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JobPtr DownloadJob::create (QUrl url,
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QString target_path,
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QString expected_md5 )
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{
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return JobPtr ( new DownloadJob ( url, target_path, expected_md5 ) );
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}
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void DownloadJob::start()
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{
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if ( m_save_to_file )
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{
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QString filename = m_target_path;
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m_output_file.setFileName ( filename );
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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 ( m_output_file.exists() && m_output_file.open ( QIODevice::ReadOnly ) )
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{
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// check the md5 against the expected one
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QString hash = QCryptographicHash::hash ( m_output_file.readAll(), QCryptographicHash::Md5 ).toHex().constData();
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m_output_file.close();
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// skip this file if they match
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if ( m_check_md5 && hash == m_expected_md5 )
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{
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qDebug() << "Skipping " << m_url.toString() << ": md5 match.";
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emit finish();
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return;
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}
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else
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{
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m_expected_md5 = hash;
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}
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}
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if(!ensureFilePathExists(filename))
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{
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emit fail();
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return;
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}
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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_expected_md5.toLatin1());
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auto &worker = NetWorker::spawn();
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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 DownloadJob::downloadProgress ( qint64 bytesReceived, qint64 bytesTotal )
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{
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emit progress ( bytesReceived, bytesTotal );
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}
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void DownloadJob::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 DownloadJob::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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// save the data to the downloadable if we aren't saving to file
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if ( !m_save_to_file )
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{
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m_data = m_reply->readAll();
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}
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else
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{
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m_output_file.close();
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}
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//TODO: check md5 here!
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m_reply.clear();
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emit finish();
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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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if ( m_save_to_file )
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{
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m_output_file.close();
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m_output_file.remove();
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}
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m_reply.clear();
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emit fail();
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return;
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}
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}
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void DownloadJob::downloadReadyRead()
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{
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if( m_save_to_file )
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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 fail();
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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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m_output_file.write ( m_reply->readAll() );
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}
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}
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