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/*
* Copyright (C) 2008-2017 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "SecurityOriginHash.h"
#include "SQLiteDatabase.h"
#include <wtf/HashCountedSet.h>
#include <wtf/HashSet.h>
#include <wtf/text/StringHash.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class ApplicationCache;
class ApplicationCacheGroup;
class ApplicationCacheHost;
class ApplicationCacheResource;
class SecurityOrigin;
class FragmentedSharedBuffer;
template<typename> class StorageIDJournal;
class ApplicationCacheStorage : public RefCounted<ApplicationCacheStorage> {
public:
enum FailureReason {
OriginQuotaReached,
TotalQuotaReached,
DiskOrOperationFailure
};
static Ref<ApplicationCacheStorage> create(const String& cacheDirectory, const String& flatFileSubdirectoryName)
{
return adoptRef(*new ApplicationCacheStorage(cacheDirectory, flatFileSubdirectoryName));
}
const String& cacheDirectory() const { return m_cacheDirectory; }
WEBCORE_EXPORT void setMaximumSize(int64_t size);
WEBCORE_EXPORT int64_t maximumSize() const;
bool isMaximumSizeReached() const;
int64_t spaceNeeded(int64_t cacheToSave);
int64_t defaultOriginQuota() const { return m_defaultOriginQuota; }
WEBCORE_EXPORT void setDefaultOriginQuota(int64_t quota);
WEBCORE_EXPORT bool calculateUsageForOrigin(const SecurityOriginData&, int64_t& usage);
WEBCORE_EXPORT bool calculateQuotaForOrigin(const SecurityOrigin&, int64_t& quota);
bool calculateRemainingSizeForOriginExcludingCache(const SecurityOrigin&, ApplicationCache*, int64_t& remainingSize);
WEBCORE_EXPORT bool storeUpdatedQuotaForOrigin(const SecurityOrigin*, int64_t quota);
bool checkOriginQuota(ApplicationCacheGroup*, ApplicationCache* oldCache, ApplicationCache* newCache, int64_t& totalSpaceNeeded);
ApplicationCacheGroup* cacheGroupForURL(const URL&); // Cache to load a main resource from.
ApplicationCacheGroup* fallbackCacheGroupForURL(const URL&); // Cache that has a fallback entry to load a main resource from if normal loading fails.
ApplicationCacheGroup* findOrCreateCacheGroup(const URL& manifestURL);
void cacheGroupDestroyed(ApplicationCacheGroup&);
void cacheGroupMadeObsolete(ApplicationCacheGroup&);
bool storeNewestCache(ApplicationCacheGroup&, ApplicationCache* oldCache, FailureReason&);
bool storeNewestCache(ApplicationCacheGroup&); // Updates the cache group, but doesn't remove old cache.
bool store(ApplicationCacheResource*, ApplicationCache*);
bool storeUpdatedType(ApplicationCacheResource*, ApplicationCache*);
// Removes the group if the cache to be removed is the newest one (so, storeNewestCache() needs to be called beforehand when updating).
void remove(ApplicationCache*);
WEBCORE_EXPORT void empty();
WEBCORE_EXPORT HashSet<SecurityOriginData> originsWithCache();
WEBCORE_EXPORT void deleteAllEntries();
// FIXME: This should be consolidated with deleteAllEntries().
WEBCORE_EXPORT void deleteAllCaches();
// FIXME: This should be consolidated with deleteCacheGroup().
WEBCORE_EXPORT void deleteCacheForOrigin(const SecurityOriginData&);
// FIXME: This should be consolidated with calculateUsageForOrigin().
WEBCORE_EXPORT int64_t diskUsageForOrigin(const SecurityOriginData&);
static int64_t unknownQuota() { return -1; }
static int64_t noQuota() { return std::numeric_limits<int64_t>::max(); }
private:
WEBCORE_EXPORT ApplicationCacheStorage(const String& cacheDirectory, const String& flatFileSubdirectoryName);
RefPtr<ApplicationCache> loadCache(unsigned storageID);
ApplicationCacheGroup* loadCacheGroup(const URL& manifestURL);
std::optional<Vector<URL>> manifestURLs();
ApplicationCacheGroup* findInMemoryCacheGroup(const URL& manifestURL) const;
bool deleteCacheGroup(const String& manifestURL);
void vacuumDatabaseFile();
using ResourceStorageIDJournal = StorageIDJournal<ApplicationCacheResource>;
using GroupStorageIDJournal = StorageIDJournal<ApplicationCacheGroup>;
bool store(ApplicationCacheGroup*, GroupStorageIDJournal*);
bool store(ApplicationCache*, ResourceStorageIDJournal*);
bool store(ApplicationCacheResource*, unsigned cacheStorageID);
bool deleteCacheGroupRecord(const String& manifestURL);
bool ensureOriginRecord(const SecurityOrigin*);
static bool shouldStoreResourceAsFlatFile(ApplicationCacheResource*);
void deleteTables();
bool writeDataToUniqueFileInDirectory(FragmentedSharedBuffer&, const String& directory, String& outFilename, StringView fileExtension);
void loadManifestHostHashes();
void verifySchemaVersion();
void openDatabase(bool createIfDoesNotExist);
bool executeStatement(SQLiteStatement&);
bool executeSQLCommand(ASCIILiteral);
void checkForMaxSizeReached();
void checkForDeletedResources();
long long flatFileAreaSize();
const String m_cacheDirectory;
const String m_flatFileSubdirectoryName;
String m_cacheFile;
int64_t m_maximumSize { noQuota() };
bool m_isMaximumSizeReached { false };
int64_t m_defaultOriginQuota { noQuota() };
SQLiteDatabase m_database;
// In order to quickly determine if a given resource exists in an application cache,
// we keep a hash set of the hosts of the manifest URLs of all non-obsolete cache groups.
HashCountedSet<unsigned, AlreadyHashed> m_cacheHostSet;
HashMap<String, ApplicationCacheGroup*> m_cachesInMemory; // Excludes obsolete cache groups.
friend class NeverDestroyed<ApplicationCacheStorage>;
};
} // namespace WebCore
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