142 lines
4.6 KiB
C++
142 lines
4.6 KiB
C++
// SPDX-License-Identifier: GPL-3.0-only
|
|
/*
|
|
* Prism Launcher - Minecraft Launcher
|
|
* Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, version 3.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
* This file incorporates work covered by the following copyright and
|
|
* permission notice:
|
|
*
|
|
* Copyright 2013-2021 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <QMap>
|
|
#include <QString>
|
|
#include <QTimer>
|
|
#include <memory>
|
|
|
|
class HttpMetaCache;
|
|
|
|
class MetaEntry {
|
|
friend class HttpMetaCache;
|
|
|
|
protected:
|
|
MetaEntry() = default;
|
|
|
|
public:
|
|
auto isStale() -> bool { return m_stale; }
|
|
void setStale(bool stale) { m_stale = stale; }
|
|
|
|
auto getFullPath() -> QString;
|
|
|
|
auto getRemoteChangedTimestamp() -> QString { return m_remote_changed_timestamp; }
|
|
void setRemoteChangedTimestamp(QString remote_changed_timestamp) { m_remote_changed_timestamp = remote_changed_timestamp; }
|
|
void setLocalChangedTimestamp(qint64 timestamp) { m_local_changed_timestamp = timestamp; }
|
|
|
|
auto getETag() -> QString { return m_etag; }
|
|
void setETag(QString etag) { m_etag = etag; }
|
|
|
|
auto getMD5Sum() -> QString { return m_md5sum; }
|
|
void setMD5Sum(QString md5sum) { m_md5sum = md5sum; }
|
|
|
|
/* Whether the entry expires after some time (false) or not (true). */
|
|
void makeEternal(bool eternal) { m_is_eternal = eternal; }
|
|
[[nodiscard]] bool isEternal() const { return m_is_eternal; }
|
|
|
|
auto getCurrentAge() -> qint64 { return m_current_age; }
|
|
void setCurrentAge(qint64 age) { m_current_age = age; }
|
|
|
|
auto getMaximumAge() -> qint64 { return m_max_age; }
|
|
void setMaximumAge(qint64 age) { m_max_age = age; }
|
|
|
|
bool isExpired(qint64 offset) { return !m_is_eternal && (m_current_age >= m_max_age - offset); };
|
|
|
|
protected:
|
|
QString m_baseId;
|
|
QString m_basePath;
|
|
QString m_relativePath;
|
|
QString m_md5sum;
|
|
QString m_etag;
|
|
|
|
qint64 m_local_changed_timestamp = 0;
|
|
QString m_remote_changed_timestamp; // QString for now, RFC 2822 encoded time
|
|
qint64 m_current_age = 0;
|
|
qint64 m_max_age = 0;
|
|
bool m_is_eternal = false;
|
|
|
|
bool m_stale = true;
|
|
};
|
|
|
|
using MetaEntryPtr = std::shared_ptr<MetaEntry>;
|
|
|
|
class HttpMetaCache : public QObject {
|
|
Q_OBJECT
|
|
public:
|
|
// supply path to the cache index file
|
|
HttpMetaCache(QString path = QString());
|
|
~HttpMetaCache() override;
|
|
|
|
// get the entry solely from the cache
|
|
// you probably don't want this, unless you have some specific caching needs.
|
|
auto getEntry(QString base, QString resource_path) -> MetaEntryPtr;
|
|
|
|
// get the entry from cache and verify that it isn't stale (within reason)
|
|
auto resolveEntry(QString base, QString resource_path, QString expected_etag = QString()) -> MetaEntryPtr;
|
|
|
|
// add a previously resolved stale entry
|
|
auto updateEntry(MetaEntryPtr stale_entry) -> bool;
|
|
|
|
// evict selected entry from cache
|
|
auto evictEntry(MetaEntryPtr entry) -> bool;
|
|
void evictAll();
|
|
|
|
void addBase(QString base, QString base_root);
|
|
|
|
// (re)start a timer that calls SaveNow later.
|
|
void SaveEventually();
|
|
void Load();
|
|
|
|
auto getBasePath(QString base) -> QString;
|
|
|
|
public slots:
|
|
void SaveNow();
|
|
|
|
private:
|
|
// create a new stale entry, given the parameters
|
|
auto staleEntry(QString base, QString resource_path) -> MetaEntryPtr;
|
|
|
|
struct EntryMap {
|
|
QString base_path;
|
|
QMap<QString, MetaEntryPtr> entry_list;
|
|
};
|
|
|
|
QMap<QString, EntryMap> m_entries;
|
|
QString m_index_file;
|
|
QTimer saveBatchingTimer;
|
|
};
|