webengine/osswebengine/cache/inc/HttpCacheUtil.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 CHttpCacheUtil
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*
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*/
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#ifndef CHTTPCACHEUTIL_H
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#define CHTTPCACHEUTIL_H
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//  INCLUDES
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#include <e32base.h>
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#include <f32file.h>
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#include <http/rhttpheaders.h>
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// CONSTANTS
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enum TCacheLoadMethod
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    {
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    EMethodGet,
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    EMethodConnect,
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    EMethodDelete,
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    EMethodHead,
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    EMethodOptions,
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    EMethodPut,
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    EMethodPost,
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    EMethodTrace,
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    };
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8
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enum TLogItemType
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    {
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    ELogItemTypeNone,
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    ELogBucketIndex,
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    ELogEntrySize,
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    ELogLookupTablePos,
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    ELogFileErrorCode
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    };
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0
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const TInt KCacheVersionNumber = 1;
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//make 16 subdirectories named 0 through F for organizing cached files
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const TUint32 KCacheSubdirCount = 16;
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_LIT( KHttpCacheHeaderExt, ".h" );
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//#define __CACHELOG__
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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 RHTTPHeaders;
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class RHTTPTransaction;
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class MHTTPDataSupplier;
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class RStringPool;
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class CHttpCacheEntry;
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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 HttpCacheUtil
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    {
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    public:
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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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        static void SetEntryOnTransL( CHttpCacheEntry& aEntry, RHTTPTransaction& aTrans, RStringF& aCacheEntryStr );
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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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        static CHttpCacheEntry* EntryOnTransL( RHTTPTransaction& aTrans, RStringF& aCacheEntryStr );
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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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        static HBufC8* HeadersToBufferLC( RHTTPHeaders& aHttpHeaders, RStringPool& aStrP );
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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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        static void BufferToHeadersL( const TDesC8& aHeaderStr, RHTTPHeaders& aHttpHeaders, RStringPool& aStrP );
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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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        static HBufC8* BodyToBufferL( MHTTPDataSupplier& aBodySupplier );
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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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        static HBufC8* MergeHeadersLC( const TDesC8& aCachedHeaderStr, RHTTPHeaders& aResponseHeaders, RStringPool& aStrP );
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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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        static HBufC8* AddHeaderLC( const TDesC8& aName, const TDesC8& aValue, const TDesC8& aHeaders );
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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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        static HBufC8* HeaderFieldFromBufferLC( const TDesC8& aHeaders, const TDesC8& aKey );
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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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        static TCacheLoadMethod MethodFromStr( RStringF aMethodStr, RStringPool aStrP );
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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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        static TBool ProtectedEntry( RHTTPHeaders& aHttpHeaders, RStringPool& aStrP );
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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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        static TBool CacheTimeIsFresh( const RHTTPHeaders& aRequestHeaders, const RHTTPHeaders& aCachedHeaders,
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            RStringPool aStrP );
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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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        static void AddValidationHeaders( const RHTTPHeaders aCachedHeaders, RHTTPHeaders& aRequestHeaders, RStringPool& aStrP );
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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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        static TBool OperatorCacheContent( const TDesC8& aOpDomain, const TDesC8& aUrl );
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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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        static TBool VSSCacheContent( const TDesC8& aUrl, const HBufC8* aWhiteList );
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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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        static TBool PragmaNoCache( RHTTPTransaction& aTrans );
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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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        static void GetHeaderFileName( const TDesC& aBodyFileName, TDes& aHeaderFileName );
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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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        static void AdjustExpirationTimeL( RHTTPHeaders& aResponseHeaders, RStringPool& aStrP );
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        /**
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        *
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        * @since 3.1
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        * @param
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        * @param
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        * @return
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        */
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        static TBool CacheNeedsUpdateL( RHTTPHeaders& aResponseHeader, const TDesC8& aCachedHeaderStr, RStringPool& aStrP );
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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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        static TBool IsCacheable( RHTTPTransaction& aTrans, TUint aMaxSize, TBool& aProtectedEntry );
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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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        static TInt GetCacheControls( const RHTTPHeaders& aHeaders, TInt64* aMaxAge, TInt64* aMinFresh, TInt64* aMaxStale, TBool* aMustRevalidate,
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            TBool* aNoCache, TBool* aNoStore, RStringPool aStrP );
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        /**
0
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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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        static HBufC* GenerateNameLC(const TDesC8& aUrl, const TDesC& aBaseDir );
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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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        static void WriteLog( TInt aLogLevel, TPtrC aBuf, TInt aAny = 0xffff );
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        /**
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        *
8
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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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        static void WriteLogFilenameAndUrl( TInt aLogLevel,
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                                            TPtrC aMethodName,
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                                            const TPtrC aFilename,
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                                            const TDesC8& aUrl,
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                                            TInt aAny,
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                                            TLogItemType aItemType = ELogItemTypeNone );
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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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        static void WriteUrlToLog( TInt aLogLevel, const TDesC8& aUrl, TInt aAny = 0xffff );
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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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        static void WriteUrlToLog( TInt aLogLevel, const TDesC& aTxt, const TDesC8& aUrl, TInt aAny = 0xffff );
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    private:
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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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        static TInt64 Freshness( const RHTTPHeaders& aHeaders, TTime aResponseTime, RStringPool aStrP );
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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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        static TInt64 Age( const RHTTPHeaders& aHeaders, TTime aRequestTime, TTime aResponseTime, RStringPool aStrP );
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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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        static TInt GetCacheControlDirective( const RHTTPHeaders& aHeaders, TInt aIndex, RStringF& aDirective, TInt64* aDirectiveValue,
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            char** aExtraValue, RStringPool aStrP );
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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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        static TInt ExtractCacheControlDirectiveValue( RStringPool aStrP, RStringF& aDirective,  TDesC8& aValue, TInt64* aDirectiveValue,
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            char** aExtraValue );
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    };
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#endif      // CHTTPCACHEUTIL_H
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// End of File