60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#pragma once
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#include <QString>
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#include <QSharedPointer>
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#include <QMap>
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#include <qtimer.h>
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struct MetaEntry
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{
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QString base;
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QString path;
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QString md5sum;
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QString etag;
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qint64 last_changed_timestamp = 0;
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bool stale = true;
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QString getFullPath();
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};
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typedef std::shared_ptr<MetaEntry> MetaEntryPtr;
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class HttpMetaCache : public QObject
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{
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Q_OBJECT
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public:
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// supply path to the cache index file
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HttpMetaCache(QString path);
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~HttpMetaCache();
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// get the entry solely from the cache
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// you probably don't want this, unless you have some specific caching needs.
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MetaEntryPtr getEntry(QString base, QString resource_path);
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// get the entry from cache and verify that it isn't stale (within reason)
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MetaEntryPtr resolveEntry(QString base, QString resource_path,
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QString expected_etag = QString());
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// add a previously resolved stale entry
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bool updateEntry(MetaEntryPtr stale_entry);
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void addBase(QString base, QString base_root);
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// (re)start a timer that calls SaveNow later.
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void SaveEventually();
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void Load();
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QString getBasePath(QString base);
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public
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slots:
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void SaveNow();
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private:
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// create a new stale entry, given the parameters
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MetaEntryPtr staleEntry(QString base, QString resource_path);
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struct EntryMap
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{
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QString base_path;
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QMap<QString, MetaEntryPtr> entry_list;
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};
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QMap<QString, EntryMap> m_entries;
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QString m_index_file;
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QTimer saveBatchingTimer;
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}; |