webengine/osswebengine/cache/inc/HttpCacheEntry.h
author Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
Fri, 08 May 2009 08:25:06 +0300
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Definition of CHttpCacheEntry
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*
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*/
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#ifndef CHTTPCACHEENTRY_H
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#define CHTTPCACHEENTRY_H
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//  INCLUDES
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#include <e32base.h>
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#include <f32file.h>
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// CONSTANTS
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const TInt KBufferSize32k = 32768;
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const TInt KBufferSizeZero = 0;
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// MACROS
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// DATA TYPES
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// FUNCTION PROTOTYPES
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// FORWARD DECLARATIONS
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class RHTTPTransaction;
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class MHTTPDataSupplier;
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class RFileWriteStream;
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class RFileReadStream;
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class CHttpCacheEvictionHandler;
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class CHttpCacheStreamHandler;
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// CLASS DECLARATION
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/**
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*  
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*  @lib 
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*  @since 3.1
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*/
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class CHttpCacheEntry : public CBase
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    {
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    public:  // Constructors and destructor        
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        enum TCacheEntryState
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            {
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            ECacheUninitialized,
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            ECacheInitialized,
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            ECacheRequesting,
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            ECacheResponding,
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            ECacheComplete,
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            ECacheDestroyed
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            };
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        /**
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        * Two-phased constructor.
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        * @since 3.1
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        * @param 
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        * @param 
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        * @return CHttpCacheEntry object.
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        */
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        static CHttpCacheEntry* NewL( const TDesC8& aUrl, 
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            CHttpCacheEvictionHandler& aEvictionHandler );
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        /**
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        * Two-phased constructor.
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        * @since 3.1
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        * @param 
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        * @param 
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        * @return CHttpCacheEntry object.
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        */
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        static CHttpCacheEntry* NewLC( const TDesC8& aUrl, 
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            CHttpCacheEvictionHandler& aEvictionHandler );
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        /**
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        * Destructor.
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        */
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        virtual ~CHttpCacheEntry();
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    public: // new functions
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void SetState( TCacheEntryState aState ); 
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TCacheEntryState State() { return iState; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void SetFileNameL( const TFileName& aFileName );
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        const TDesC& Filename() const { return *iFileName; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline const TDesC8& Url() const { return *iUrl; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TInt64 LastAccessed() const { return iLastAccessed; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void Accessed();
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TUint16 Ref() const { return iRef; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TUint BodySize() const { return iBodySize; }
0
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void SetBodySize( TUint aSize );
0
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TUint16 HeaderSize() const { return iHeaderSize; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline void SetHeaderSize( TUint16 aHeaderSize ) { iHeaderSize = aHeaderSize; }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        inline RFile& HeaderFile() { return iHeaderFile; }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        inline RFile& BodyFile() { return iBodyFile; }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        TPtr8 CacheBuffer();
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        void SetCacheBufferL( TInt aCacheBufferSize );
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        /**
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        * 
0
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        inline TBool Protected() const { return iProtected; }
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void SetProtected();
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        TInt Internalize( RFileReadStream& aReadStream );
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        TInt Externalize( RFileWriteStream& aWriteStream );
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        /**
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        * 
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        * @since 3.1
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        * @param 
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        * @return 
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        */
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        void Accessed(TInt64 aLastAccessed, TUint16 aRef);
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8
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        inline TBool BodyFileDeleteNeeded() { return iBodyFileDeleteNeeded; }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        inline void SetBodyFileDeleteNeeded( TBool aBodyFileDeleteNeeded )
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                    {
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                    iBodyFileDeleteNeeded = aBodyFileDeleteNeeded;
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                    }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        TBool CacheFilesOpened() { return iCacheFilesOpened; }
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        /**
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        * 
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        * @since 7.1
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        * @param 
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        * @return 
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        */
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        void SetCacheFilesOpened( TBool aCacheFilesOpened );
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0
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    public : 
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        // support linked list
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        static const TInt iOffset;
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    private:
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        /**
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        * Construct.
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        * @since 3.1
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        * @param 
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        * @param 
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        * @return CHttpCacheEntry object.
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        */
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        CHttpCacheEntry( CHttpCacheEvictionHandler& aEvictionHandler );
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        /**
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        * By default Symbian 2nd phase constructor is private.
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        */
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        void ConstructL( const TDesC8& aUrl );    
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    private:    // Data
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        //
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        HBufC8*                         iUrl;               // owned
0
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        // if empty, then use url to get filename
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        HBufC*                          iFileName;          // owned
0
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        //
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        TCacheEntryState                iState;
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        //
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        TInt64                          iLastAccessed;
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        // ref counter
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        TUint16                         iRef;
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        // content size
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        TUint                           iBodySize;
0
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        // header size
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        TUint16                         iHeaderSize;
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        // protected content like css, script
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        TUint8                          iProtected;
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        //
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        TSglQueLink                     iSqlQueLink;
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        //
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        CHttpCacheEvictionHandler*      iEvictionHandler;   // not owned
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        // Etrue if added to the eviction table
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        TUint8                          iEvictionCandidate;
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        //
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        TBool                           iBodyFileDeleteNeeded;
0
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        //
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        RFile                           iHeaderFile;        // owned
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        //
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        RFile                           iBodyFile;          // owned
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        //
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        HBufC8*                         iCacheBuffer;       // owned
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        // ETrue if files open (and attached to StreamHandler) for read/write
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        TBool                           iCacheFilesOpened;
0
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    };
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#endif      // CHTTPCACHEENTRY_H
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// End of File