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/*
* Copyright (C) 2008, 2009 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.
*/
#ifndef ApplicationCacheGroup_h
#define ApplicationCacheGroup_h
#if ENABLE(OFFLINE_WEB_APPLICATIONS)
#include <wtf/Noncopyable.h>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include "KURL.h"
#include "PlatformString.h"
#include "ResourceHandle.h"
#include "ResourceHandleClient.h"
#include "SharedBuffer.h"
namespace WebCore {
class ApplicationCache;
class ApplicationCacheResource;
class DOMApplicationCache;
class Document;
class DocumentLoader;
class Frame;
enum ApplicationCacheUpdateOption {
ApplicationCacheUpdateWithBrowsingContext,
ApplicationCacheUpdateWithoutBrowsingContext
};
class ApplicationCacheGroup : public Noncopyable, ResourceHandleClient {
public:
ApplicationCacheGroup(const KURL& manifestURL, bool isCopy = false);
~ApplicationCacheGroup();
enum UpdateStatus { Idle, Checking, Downloading };
static ApplicationCache* cacheForMainRequest(const ResourceRequest&, DocumentLoader*);
static ApplicationCache* fallbackCacheForMainRequest(const ResourceRequest&, DocumentLoader*);
static void selectCache(Frame*, const KURL& manifestURL);
static void selectCacheWithoutManifestURL(Frame*);
const KURL& manifestURL() const { return m_manifestURL; }
UpdateStatus updateStatus() const { return m_updateStatus; }
void setStorageID(unsigned storageID) { m_storageID = storageID; }
unsigned storageID() const { return m_storageID; }
void clearStorageID();
void update(Frame*, ApplicationCacheUpdateOption); // FIXME: Frame should not bee needed when updating witout browsing context.
void cacheDestroyed(ApplicationCache*);
bool cacheIsBeingUpdated(const ApplicationCache* cache) const { return cache == m_cacheBeingUpdated; }
ApplicationCache* newestCache() const { return m_newestCache.get(); }
void setNewestCache(PassRefPtr<ApplicationCache>);
void makeObsolete();
bool isObsolete() const { return m_isObsolete; }
void finishedLoadingMainResource(DocumentLoader*);
void failedLoadingMainResource(DocumentLoader*);
void disassociateDocumentLoader(DocumentLoader*);
bool isCopy() const { return m_isCopy; }
private:
typedef void (DOMApplicationCache::*ListenerFunction)();
static void postListenerTask(ListenerFunction, const HashSet<DocumentLoader*>&);
static void postListenerTask(ListenerFunction, const Vector<RefPtr<DocumentLoader> >& loaders);
static void postListenerTask(ListenerFunction, DocumentLoader*);
void scheduleReachedMaxAppCacheSizeCallback();
PassRefPtr<ResourceHandle> createResourceHandle(const KURL&, ApplicationCacheResource* newestCachedResource);
virtual void didReceiveResponse(ResourceHandle*, const ResourceResponse&);
virtual void didReceiveData(ResourceHandle*, const char*, int, int lengthReceived);
virtual void didFinishLoading(ResourceHandle*);
virtual void didFail(ResourceHandle*, const ResourceError&);
void didReceiveManifestResponse(const ResourceResponse&);
void didReceiveManifestData(const char*, int);
void didFinishLoadingManifest();
void didReachMaxAppCacheSize();
void startLoadingEntry();
void deliverDelayedMainResources();
void checkIfLoadIsComplete();
void cacheUpdateFailed();
void manifestNotFound();
void addEntry(const String&, unsigned type);
void associateDocumentLoaderWithCache(DocumentLoader*, ApplicationCache*);
void stopLoading();
KURL m_manifestURL;
UpdateStatus m_updateStatus;
// This is the newest complete cache in the group.
RefPtr<ApplicationCache> m_newestCache;
// All complete caches in this cache group.
HashSet<ApplicationCache*> m_caches;
// The cache being updated (if any). Note that cache updating does not immediately create a new
// ApplicationCache object, so this may be null even when update status is not Idle.
RefPtr<ApplicationCache> m_cacheBeingUpdated;
// List of pending master entries, used during the update process to ensure that new master entries are cached.
HashSet<DocumentLoader*> m_pendingMasterResourceLoaders;
// How many of the above pending master entries have not yet finished downloading.
int m_downloadingPendingMasterResourceLoadersCount;
// These are all the document loaders that are associated with a cache in this group.
HashSet<DocumentLoader*> m_associatedDocumentLoaders;
// The URLs and types of pending cache entries.
typedef HashMap<String, unsigned> EntryMap;
EntryMap m_pendingEntries;
// Frame used for fetching resources when updating.
// FIXME: An update started by a particular frame should not stop if it is destroyed, but there are other frames associated with the same cache group.
Frame* m_frame;
// An obsolete cache group is never stored, but the opposite is not true - storing may fail for multiple reasons, such as exceeding disk quota.
unsigned m_storageID;
bool m_isObsolete;
// During update, this is used to handle asynchronously arriving results.
enum CompletionType {
None,
NoUpdate,
Failure,
Completed
};
CompletionType m_completionType;
// Whether this cache group is a copy that's only used for transferring the cache to another file.
bool m_isCopy;
// This flag is set immediately after the ChromeClient::reachedMaxAppCacheSize() callback is invoked as a result of the storage layer failing to save a cache
// due to reaching the maximum size of the application cache database file. This flag is used by ApplicationCacheGroup::checkIfLoadIsComplete() to decide
// the course of action in case of this failure (i.e. call the ChromeClient callback or run the failure steps).
bool m_calledReachedMaxAppCacheSize;
RefPtr<ResourceHandle> m_currentHandle;
RefPtr<ApplicationCacheResource> m_currentResource;
RefPtr<ApplicationCacheResource> m_manifestResource;
RefPtr<ResourceHandle> m_manifestHandle;
friend class ChromeClientCallbackTimer;
};
} // namespace WebCore
#endif // ENABLE(OFFLINE_WEB_APPLICATIONS)
#endif // ApplicationCacheGroup_h
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