MultiMC5/logic/net/HttpMetaCache.h

75 lines
2.0 KiB
C
Raw Normal View History

/* Copyright 2013 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.
*/
2013-09-06 19:58:51 +00:00
#pragma once
#include <QString>
#include <QMap>
#include <qtimer.h>
2013-09-06 19:58:51 +00:00
struct MetaEntry
{
QString base;
QString path;
QString md5sum;
QString etag;
qint64 local_changed_timestamp = 0;
QString remote_changed_timestamp; // QString for now, RFC 2822 encoded time
bool stale = true;
QString getFullPath();
2013-09-06 19:58:51 +00:00
};
2013-10-05 23:13:40 +00:00
typedef std::shared_ptr<MetaEntry> MetaEntryPtr;
2013-09-06 19:58:51 +00:00
class HttpMetaCache : public QObject
2013-09-06 19:58:51 +00:00
{
Q_OBJECT
2013-09-06 19:58:51 +00:00
public:
// supply path to the cache index file
HttpMetaCache(QString path);
~HttpMetaCache();
2013-09-22 12:00:37 +00:00
// get the entry solely from the cache
// you probably don't want this, unless you have some specific caching needs.
MetaEntryPtr getEntry(QString base, QString resource_path);
2013-09-22 12:00:37 +00:00
// get the entry from cache and verify that it isn't stale (within reason)
2013-09-22 12:00:37 +00:00
MetaEntryPtr resolveEntry(QString base, QString resource_path,
QString expected_etag = QString());
// add a previously resolved stale entry
bool updateEntry(MetaEntryPtr stale_entry);
2013-09-22 12:00:37 +00:00
2013-09-06 19:58:51 +00:00
void addBase(QString base, QString base_root);
2013-09-22 12:00:37 +00:00
// (re)start a timer that calls SaveNow later.
void SaveEventually();
2013-09-06 19:58:51 +00:00
void Load();
2013-09-22 12:00:37 +00:00
QString getBasePath(QString base);
public
slots:
void SaveNow();
2013-09-22 12:00:37 +00:00
private:
// create a new stale entry, given the parameters
MetaEntryPtr staleEntry(QString base, QString resource_path);
2013-09-06 19:58:51 +00:00
struct EntryMap
{
QString base_path;
QMap<QString, MetaEntryPtr> entry_list;
};
QMap<QString, EntryMap> m_entries;
QString m_index_file;
QTimer saveBatchingTimer;
2013-09-06 19:58:51 +00:00
};