153 lines
4.1 KiB
C++
153 lines
4.1 KiB
C++
/* Copyright 2013 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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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 "logger/QsLog.h"
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CacheDownload::CacheDownload(QUrl url, MetaEntryPtr entry)
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: NetAction(), 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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QLOG_INFO() << "Downloading " << m_url.toString();
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QNetworkRequest request(m_url);
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if (m_entry->remote_changed_timestamp.size())
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request.setRawHeader(QString("If-Modified-Since").toLatin1(),
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m_entry->remote_changed_timestamp.toLatin1());
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if (m_entry->etag.size())
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request.setRawHeader(QString("If-None-Match").toLatin1(), m_entry->etag.toLatin1());
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request.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0 (Cached)");
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auto worker = MMC->qnam();
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QNetworkReply *rep = worker->get(request);
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m_reply = std::shared_ptr<QNetworkReply>(rep);
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connect(rep, SIGNAL(downloadProgress(qint64, qint64)),
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SLOT(downloadProgress(qint64, qint64)));
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connect(rep, SIGNAL(finished()), SLOT(downloadFinished()));
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connect(rep, SIGNAL(error(QNetworkReply::NetworkError)),
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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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QLOG_ERROR() << "Failed" << m_url.toString() << "with reason" << error;
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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 =
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QCryptographicHash::hash(m_output_file.readAll(), QCryptographicHash::Md5)
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.toHex()
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.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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if (m_reply->hasRawHeader("Last-Modified"))
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{
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m_entry->remote_changed_timestamp = m_reply->rawHeader("Last-Modified").constData();
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}
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m_entry->local_changed_timestamp =
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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.reset();
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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.reset();
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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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