/*
* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: Definition of CHttpCacheEntry
*
*/
#ifndef CHTTPCACHEENTRY_H
#define CHTTPCACHEENTRY_H
// INCLUDES
#include <e32base.h>
#include <f32file.h>
#include "HttpCachePostponeWriteUtilities.h"
// CONSTANTS
// MACROS
// DATA TYPES
// FUNCTION PROTOTYPES
// FORWARD DECLARATIONS
class RHTTPTransaction;
class MHTTPDataSupplier;
class RFileWriteStream;
class RFileReadStream;
class CHttpCacheEvictionHandler;
class CHttpCacheStreamHandler;
// CLASS DECLARATION
/**
*
* @lib
* @since 3.1
*/
class CHttpCacheEntry : public CBase, public MHttpCacheWriteSource
{
public: // Constructors and destructor
enum TCacheEntryState
{
ECacheUninitialized,
ECacheInitialized,
ECacheRequesting,
ECacheResponding,
ECacheComplete,
ECacheDestroyed
};
/**
* Two-phased constructor.
* @since 3.1
* @param
* @param
* @return CHttpCacheEntry object.
*/
static CHttpCacheEntry* NewL( const TDesC8& aUrl,
CHttpCacheEvictionHandler& aEvictionHandler );
/**
* Two-phased constructor.
* @since 3.1
* @param
* @param
* @return CHttpCacheEntry object.
*/
static CHttpCacheEntry* NewLC( const TDesC8& aUrl,
CHttpCacheEvictionHandler& aEvictionHandler );
/**
* Destructor.
*/
virtual ~CHttpCacheEntry();
public: // new functions
/**
*
* @since 3.1
* @param
* @return
*/
void SetState( TCacheEntryState aState );
/**
*
* @since 3.1
* @param
* @return
*/
inline TCacheEntryState State() { return iState; }
/**
*
* @since 3.1
* @param
* @return
*/
void SetFileNameL( const TFileName& aFileName );
/**
*
* @since 3.1
* @param
* @return
*/
const TDesC& Filename() const { return *iFileName; }
/**
*
* @since 3.1
* @param
* @return
*/
inline const TDesC8& Url() const { return *iUrl; }
/**
*
* @since 3.1
* @param
* @return
*/
inline TInt64 LastAccessed() const { return iLastAccessed; }
/**
*
* @since 3.1
* @param
* @return
*/
void Accessed();
/**
*
* @since 3.1
* @param
* @return
*/
inline TUint16 Ref() const { return iRef; }
/**
*
* @since 3.1
* @param
* @return
*/
inline TUint BodySize() const { return iBodySize; }
/**
*
* @since 3.1
* @param
* @return
*/
void SetBodySize( TUint aSize );
/**
*
* @since 3.1
* @param
* @return
*/
inline TUint16 HeaderSize() const { return iHeaderSize; }
/**
*
* @since 3.1
* @param
* @return
*/
inline void SetHeaderSize( TUint16 aHeaderSize ) { iHeaderSize = aHeaderSize; }
/**
*
* @since 7.1
* @param
* @return
*/
void CreateHeaderBufferL( TInt aHeaderBufferSize );
/**
*
* @since 7.1
* @param
* @return
*/
void CreateHeaderBufferL( const TDesC8& aHeaderData );
/**
*
* @since 7.1
* @param
* @return
*/
TDesC8& HeaderData();
/**
*
* @since 3.1
* @param
* @return
*/
inline TBool Protected() const { return iProtected; }
/**
*
* @since 3.1
* @param
* @return
*/
void SetProtected();
/**
*
* @since 3.1
* @param
* @return
*/
TInt Internalize( RReadStream& aReadStream, const TDesC& aDirectory );
/**
*
* @since 7.1
* @param
* @return
*/
void InternalizeL( RReadStream& aReadStream, const TDesC& aDirectory );
/**
*
* @since 3.1
* @param
* @return
*/
TInt Externalize( RWriteStream& aWriteStream, const TDesC& aDirectory );
/**
*
* @since 3.1
* @param
* @return
*/
void ExternalizeL( RWriteStream& aWriteStream, const TDesC& aDirectory );
/**
*
* @since 3.1
* @param
* @return
*/
void Accessed(TInt64 aLastAccessed, TUint16 aRef);
/**
*
* @since 7.1
* @param
* @return
*/
inline TBool BodyFileDeleteNeeded() { return iBodyFileDeleteNeeded; }
/**
*
* @since 7.1
* @param
* @return
*/
inline void SetBodyFileDeleteNeeded( TBool aBodyFileDeleteNeeded )
{
iBodyFileDeleteNeeded = aBodyFileDeleteNeeded;
}
/**
*
* @since 7.1
* @param
* @return
*
*/
void UnsetEvictionCandidate() { iEvictionCandidate = EFalse; }; // this only exists because when EvictL removes an item from the eviction candidate list, it can't tell the entry that this has happened and so the entry then goes on to attempt to remove itself later when it's being deleted.
public :
// support linked list
static const TInt iOffset;
private:
/**
* Construct.
* @since 3.1
* @param
* @param
* @return CHttpCacheEntry object.
*/
CHttpCacheEntry( CHttpCacheEvictionHandler& aEvictionHandler );
/**
* By default Symbian 2nd phase constructor is private.
*/
void ConstructL( const TDesC8& aUrl );
/**
*
* @since 7.1
* @param
* @return
*/
void SetCacheBufferL( TInt aCacheBufferSize );
public:
// from MHttpCacheStreamWriteSource
virtual RFile& BodyFile();
virtual void BodyWriteInProgress();
virtual void BodyWriteComplete();
virtual CSegmentedHeapBuffer& BodyData();
enum TWriteStateBits
{
EFileOk = 0x01,
EHeaderDataCached = 0x02,
ENewHeaderData = 0x04,
EBodyDataCached = 0x08,
EDelayedWriteAllowed = 0x10,
EDelayedWriteInProgress = 0x20,
EBodyDataPartiallyWritten = 0x40
};
inline TBool FileOk() const { return (iWriteState & EFileOk); }
inline TBool BodyDataCached() const { return (iWriteState & EBodyDataCached); }
inline TBool DelayedWriteAllowed() const { return (iWriteState & EDelayedWriteAllowed); }
inline TBool DelayedWriteInProgress() const { return (iWriteState & EDelayedWriteInProgress); }
inline TBool BodyDataPartiallyWritten() const { return (iWriteState & EBodyDataPartiallyWritten); }
inline void SetFileOk(TBool aBit) { (aBit ? iWriteState |= EFileOk : iWriteState &= ~EFileOk); }
void SetBodyDataCached(TBool aBit) { (aBit ? iWriteState |= EBodyDataCached : iWriteState &= ~EBodyDataCached); if(!aBit){ iCacheBuffer->Reset(); } }
void SetDelayedWriteAllowed(TBool aBit) { (aBit ? iWriteState |= EDelayedWriteAllowed : iWriteState &= ~EDelayedWriteAllowed); }
void SetDelayedWriteInProgress(TBool aBit) { (aBit ? iWriteState |= EDelayedWriteInProgress : iWriteState &= ~EDelayedWriteInProgress); }
void SetBodyDataPartiallyWritten(TBool aBit){ (aBit ? iWriteState |= EBodyDataPartiallyWritten : iWriteState &= ~EBodyDataPartiallyWritten); }
void WriteBodyDataAsync(TRequestStatus& aStatus);
void CancelBodyWrite();
private: // Data
//
HBufC8* iUrl; // owned
// if empty, then use url to get filename
HBufC* iFileName; // owned
//
TCacheEntryState iState;
//
TInt64 iLastAccessed;
// ref counter
TUint16 iRef;
// content size
TUint iBodySize;
// header size
TUint16 iHeaderSize;
// protected content like css, script
TUint8 iProtected;
//
TSglQueLink iSqlQueLink;
//
CHttpCacheEvictionHandler* iEvictionHandler; // not owned
// Etrue if added to the eviction table
TUint8 iEvictionCandidate;
//
TBool iBodyFileDeleteNeeded;
//
RFile iBodyFile; // owned
//
CSegmentedHeapBuffer* iCacheBuffer; //owned
//
HBufC8* iHeaderBuffer; // owned
// TWriteStateBits
TUint32 iWriteState;
//
CHttpCacheEntryAsyncWriteHelper* iWriteHelper; //owned
};
#endif // CHTTPCACHEENTRY_H
// End of File