145 lines
4.8 KiB
C++
145 lines
4.8 KiB
C++
// SPDX-License-Identifier: GPL-3.0-only
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/*
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* Prism Launcher - Minecraft Launcher
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* Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright 2013-2021 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 "MetaCacheSink.h"
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#include <QFile>
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#include <QFileInfo>
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#include <QRegularExpression>
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#include "Application.h"
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#include "net/Logging.h"
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namespace Net {
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/** Maximum time to hold a cache entry
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* = 1 week in seconds
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*/
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#define MAX_TIME_TO_EXPIRE 1*7*24*60*60
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MetaCacheSink::MetaCacheSink(MetaEntryPtr entry, ChecksumValidator * md5sum, bool is_eternal)
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:Net::FileSink(entry->getFullPath()), m_entry(entry), m_md5Node(md5sum), m_is_eternal(is_eternal)
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{
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addValidator(md5sum);
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}
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Task::State MetaCacheSink::initCache(QNetworkRequest& request)
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{
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if (!m_entry->isStale())
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{
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return Task::State::Succeeded;
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}
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// check if file exists, if it does, use its information for the request
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QFile current(m_filename);
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if(current.exists() && current.size() != 0)
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{
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if (m_entry->getRemoteChangedTimestamp().size())
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{
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request.setRawHeader(QString("If-Modified-Since").toLatin1(), m_entry->getRemoteChangedTimestamp().toLatin1());
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}
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if (m_entry->getETag().size())
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{
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request.setRawHeader(QString("If-None-Match").toLatin1(), m_entry->getETag().toLatin1());
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}
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}
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return Task::State::Running;
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}
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Task::State MetaCacheSink::finalizeCache(QNetworkReply & reply)
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{
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QFileInfo output_file_info(m_filename);
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if(wroteAnyData)
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{
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m_entry->setMD5Sum(m_md5Node->hash().toHex().constData());
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}
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m_entry->setETag(reply.rawHeader("ETag").constData());
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if (reply.hasRawHeader("Last-Modified"))
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{
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m_entry->setRemoteChangedTimestamp(reply.rawHeader("Last-Modified").constData());
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}
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m_entry->setLocalChangedTimestamp(output_file_info.lastModified().toUTC().toMSecsSinceEpoch());
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{ // Cache lifetime
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if (m_is_eternal) {
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qCDebug(taskMetaCacheLogC) << "Adding eternal cache entry:" << m_entry->getFullPath();
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m_entry->makeEternal(true);
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} else if (reply.hasRawHeader("Cache-Control")) {
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auto cache_control_header = reply.rawHeader("Cache-Control");
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qCDebug(taskMetaCacheLogC) << "Parsing 'Cache-Control' header with" << cache_control_header;
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QRegularExpression max_age_expr("max-age=([0-9]+)");
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qint64 max_age = max_age_expr.match(cache_control_header).captured(1).toLongLong();
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m_entry->setMaximumAge(max_age);
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} else if (reply.hasRawHeader("Expires")) {
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auto expires_header = reply.rawHeader("Expires");
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qCDebug(taskMetaCacheLogC) << "Parsing 'Expires' header with" << expires_header;
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qint64 max_age = QDateTime::fromString(expires_header).toSecsSinceEpoch() - QDateTime::currentSecsSinceEpoch();
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m_entry->setMaximumAge(max_age);
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} else {
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m_entry->setMaximumAge(MAX_TIME_TO_EXPIRE);
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}
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if (reply.hasRawHeader("Age")) {
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auto age_header = reply.rawHeader("Age");
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qCDebug(taskMetaCacheLogC) << "Parsing 'Age' header with" << age_header;
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qint64 current_age = age_header.toLongLong();
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m_entry->setCurrentAge(current_age);
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} else {
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m_entry->setCurrentAge(0);
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}
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}
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m_entry->setStale(false);
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APPLICATION->metacache()->updateEntry(m_entry);
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return Task::State::Succeeded;
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}
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bool MetaCacheSink::hasLocalData()
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{
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QFileInfo info(m_filename);
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return info.exists() && info.size() != 0;
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}
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}
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