author | Simon Howkins <simonh@symbian.org> |
Mon, 15 Nov 2010 14:53:34 +0000 | |
branch | RCL_3 |
changeset 105 | 871af676edac |
parent 95 | d96eed154187 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002-2004 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: Implements the double buffering functionality in the DownloadManager |
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* |
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*/ |
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#include <bldvariant.hrh> |
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#include "FileExt.h" |
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#include "HttpClientApp.h" |
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#include "HttpDownload.h" |
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#include "HttpStorage.h" |
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#include "BuffStorage.h" |
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#include "HttpDownloadManagerServerEngine.h" |
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#include "HttpDownloadMgrLogger.h" |
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#include "HeaderField.h" |
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#include <SysUtil.h> |
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#include <DocumentHandler.h> |
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#include <APMSTD.H> |
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#include "HttpDownloadMgrLogger.h" |
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#ifdef __SYNCML_DM_FOTA |
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#include <fotaengine.h> |
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#endif |
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#ifdef RD_MULTIPLE_DRIVE |
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#include <driveinfo.h> |
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#endif //RD_MULTIPLE_DRIVE |
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// EXTERNAL DATA STRUCTURES |
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//extern ?external_data; |
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// EXTERNAL FUNCTION PROTOTYPES |
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//extern ?external_function( ?arg_type,?arg_type ); |
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// CONSTANTS |
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//const ?type ?constant_var = ?constant; |
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// --------------------------------------------------------- |
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// CBuffStorage::CBuffStorage |
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// --------------------------------------------------------- |
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// |
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CBuffStorage::CBuffStorage( CHttpStorage* aHttpStorage ) |
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:iFile(aHttpStorage->iFile), |
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iDownloadedSize(aHttpStorage->iDownloadedSize), |
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iBufferedSize(aHttpStorage->iBufferedSize), |
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iHttpStorageBufferSize(aHttpStorage->iBufferSize), |
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iHttpStorageLength(aHttpStorage->iLength), |
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iBufferingEnabled(aHttpStorage->iBufferingEnabled), |
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iProgressiveDownload(aHttpStorage->iProgressiveDownload) |
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#ifdef __SYNCML_DM_FOTA |
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,iFotaStream(aHttpStorage->iFotaStream) |
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#endif // __SYNCML_DM_FOTA |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CBuffStorage::ConstructL |
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// Symbian 2nd phase constructor can leave. |
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// ----------------------------------------------------------------------------- |
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// |
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void CBuffStorage::ConstructL() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CBuffStorage::NewL |
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// Two-phased constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CBuffStorage* CBuffStorage::NewL( CHttpStorage* aHttpStorage ) |
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{ |
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CBuffStorage* self = new( ELeave ) CBuffStorage( aHttpStorage ); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop(); |
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return self; |
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} |
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// --------------------------------------------------------- |
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// CBuffStorage::~CBuffStorage |
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// --------------------------------------------------------- |
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// |
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CBuffStorage::~CBuffStorage() |
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{ |
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ResetBuffers(); |
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delete iWritePtr; iWritePtr = 0; |
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} |
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// --------------------------------------------------------- |
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// CBuffStorage::ResetBuffer |
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// --------------------------------------------------------- |
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// |
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void CBuffStorage::ResetBuffers() |
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{ |
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CLOG_WRITE_1("(%08X) CBuffStorage::ResetBuffers >>", this); |
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// Cleanup |
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delete iBuff1; iBuff1 = NULL; |
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delete iBuff2; iBuff2 = NULL; |
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iClientBuffer = NULL; |
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iBufferSize = 0; |
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|
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CLOG_WRITE_1("(%08X) CBuffStorage::ResetBuffers <<", this); |
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} |
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|
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// --------------------------------------------------------- |
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// CBuffStorage::WriteOutNextBodyDataL |
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// --------------------------------------------------------- |
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// |
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TBool CBuffStorage::WriteOutNextBodyDataL( const TDesC8& aBuf ) |
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{ |
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TBool retVal( ETrue ); |
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|
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if( iFile ) |
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{ |
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if( iBufferingEnabled ) |
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{ |
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DoBufferingWriteL(aBuf); |
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} |
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else |
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{ |
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DoNonbufferingWriteL(aBuf); |
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} |
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} |
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#ifdef __SYNCML_DM_FOTA |
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else if( iFotaStream ) |
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{ |
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iFotaStream->WriteL( aBuf ); |
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} |
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#endif // __SYNCML_DM_FOTA |
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|
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|
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if( iHttpStorageLength != KDefaultContentLength && |
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iBufferedSize > iHttpStorageLength ) |
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// we don't know actually how many bytes will come down. |
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{ |
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CLOG_WRITE_1( "(%08X) CBuffStorage::WriteOutNextBodyDataL: Length modified", this); |
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iHttpStorageLength = KDefaultContentLength; |
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retVal = EFalse; |
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} |
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|
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return retVal; |
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} |
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|
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// --------------------------------------------------------- |
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// CBuffStorage::FlushBuffersL |
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// --------------------------------------------------------- |
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// |
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void CBuffStorage::FlushBuffersL() |
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{ |
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if(!iFile) |
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{ |
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return; |
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} |
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|
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CLOG_WRITE_1("(%08X) CBuffStorage::FlushBuffersL >>", this); |
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|
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// Make sure async writes are finished before doing anything |
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|
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if(iLastWriteErrorCode != KErrNone) |
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{ |
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CLOG_WRITE_2("(%08X) CBuffStorage::FlushBuffersL: last error = %d", this, iLastWriteErrorCode); |
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TInt err = iLastWriteErrorCode; |
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iLastWriteErrorCode = KErrNone; |
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User::Leave(err); |
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} |
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|
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if(iClientBuffer) |
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{ |
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// Flush whatever is left on the client buffer |
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TInt len = iClientBuffer->Length(); |
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|
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CLOG_WRITE_2("(%08X) CBuffStorage::FlushBuffersL: %d bytes", this, len); |
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if(len > 0) |
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{ |
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// Write to file |
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TPtr8 des(iClientBuffer->Des()); |
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|
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User::LeaveIfError(iFile->Write(des)); |
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|
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// Update how much was written to file |
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iDownloadedSize += len; |
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|
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des.Zero(); |
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} |
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} |
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|
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CLOG_WRITE_1("(%08X) CBuffStorage::FlushBuffersL <<", this); |
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} |
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|
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// --------------------------------------------------------- |
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// CBuffStorage::DoBufferingWriteL |
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// --------------------------------------------------------- |
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// |
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void CBuffStorage::DoBufferingWriteL(const TDesC8& aBuf) |
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{ |
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if(iBufferSize != iHttpStorageBufferSize) |
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{ |
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CLOG_WRITE_3("(%08X) CBuffStorage::DoBufferingWriteL: Allocate %d - downloaded %d", this, iHttpStorageBufferSize, iBufferedSize); |
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|
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// Make sure nothing is leaked |
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delete iBuff1; iBuff1 = 0; |
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delete iBuff2; iBuff2 = 0; |
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iBufferSize = 0; |
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226 |
|
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227 |
// Allocate buffers |
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iBuff1 = HBufC8::NewL(iHttpStorageBufferSize); |
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iBuff2 = HBufC8::NewL(iHttpStorageBufferSize); |
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230 |
|
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// Mark that we now have buffers that are iBufferSize big |
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iBufferSize = iHttpStorageBufferSize; |
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233 |
|
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// Set client to use buffer 1 |
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iClientBuffer = iBuff1; |
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236 |
|
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237 |
} |
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238 |
|
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239 |
// Get incoming data pointer and size |
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const TUint8* src = aBuf.Ptr(); |
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TInt incomingBuffSize = aBuf.Length(); |
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242 |
|
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// Process the data in blocks |
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while(incomingBuffSize) |
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245 |
{ |
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// Get pointer to current client buffer data (at start of loop since iClientBuffer can change) |
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TPtr8 buff = iClientBuffer->Des(); |
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TInt buffLength = buff.Length(); |
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249 |
|
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// How much space in the buffer |
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TInt toFillUp = iBufferSize - buffLength; |
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252 |
|
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// Check if we can just fit everything in the current buffer |
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if(incomingBuffSize < toFillUp) |
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255 |
{ |
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// Dump data on the current client buffer since ample space exists |
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buff.Append(src, incomingBuffSize); |
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258 |
|
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// Update the 'received' counter on how much we got from air |
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iBufferedSize += incomingBuffSize; |
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261 |
|
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CLOG_WRITE_4("(%08X) CBuffStorage::DoBufferingWriteL: Copied %d, now %d / %d", this, incomingBuffSize, buff.Length(), iBufferSize); |
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263 |
|
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// And break out of the loop since we're finished for this round |
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break; |
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266 |
} |
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267 |
|
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268 |
// At this point we have data that either fills or overflows the buffer so append as much as fits |
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buff.Append( src, toFillUp ); |
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270 |
|
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271 |
// Update the 'received' counter on how much we copied |
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iBufferedSize+=toFillUp; |
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273 |
|
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CLOG_WRITE_4("(%08X) CBuffStorage::DoBufferingWriteL: Copied %d, now %d / %d", this, toFillUp, buff.Length(), iBufferSize); |
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275 |
|
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// Subtract how much we copied from the loop counter and advance source data pointer |
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incomingBuffSize -= toFillUp; |
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278 |
src+=toFillUp; |
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279 |
|
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// Now we have a full client buffer, better do something with it |
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281 |
|
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282 |
// In case of async writes we have to check if there was error previously |
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283 |
if(iLastWriteErrorCode != KErrNone) |
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284 |
{ |
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285 |
// Clear the error code and leave with it |
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286 |
TInt err = iLastWriteErrorCode; |
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iLastWriteErrorCode = KErrNone; |
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288 |
User::Leave(err); |
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|
289 |
} |
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|
290 |
|
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291 |
if(iProgressiveDownload) |
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|
292 |
{ |
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|
293 |
CLOG_WRITE_1("(%08X) CBuffStorage::DoBufferingWriteL: Buffer full -> Progressive download", this); |
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294 |
TInt len = buff.Length(); |
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295 |
|
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296 |
// Progressive download -> just do a synchronous write and update counter |
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297 |
User::LeaveIfError(iFile->Write(buff)); |
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|
298 |
|
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299 |
// Update how much was written to file (sync write) |
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300 |
iDownloadedSize += len; |
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|
301 |
|
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302 |
// Clear out client buffer |
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|
303 |
buff.Zero(); |
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|
304 |
|
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305 |
// Continue for next write |
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306 |
continue; |
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|
307 |
} |
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|
308 |
|
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|
309 |
// We must keep the descriptor alive until async operations have finished |
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310 |
if(!iWritePtr) |
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|
311 |
{ |
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312 |
iWritePtr = new (ELeave) TPtr8(iClientBuffer->Des()); |
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|
313 |
} |
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314 |
else |
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|
315 |
{ |
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316 |
iWritePtr->Set(iClientBuffer->Des()); |
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|
317 |
} |
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|
318 |
|
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|
319 |
#ifdef _DEBUG |
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Revision: 200911
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|
320 |
// Print out file position so we can check alignments |
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|
321 |
TInt currentPos(0); |
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322 |
iFile->Seek(ESeekCurrent, currentPos); |
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|
323 |
CLOG_WRITE_3("(%08X) CBuffStorage::DoBufferingWriteL - Start async write %d bytes, filepos=%d", this, iWritePtr->Length(), currentPos); |
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|
324 |
#endif |
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|
325 |
|
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|
326 |
// Start the async write and set AO active |
95
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Revision: 201034
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94
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|
327 |
iFile->Write( *iWritePtr ) ; |
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Revision: 201034
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|
328 |
iDownloadedSize += iWritePtr->Length(); |
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Revision: 201034
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94
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|
329 |
// Swap buffer pointers (we can't use the same buffer here |
0
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Revision: 200911
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|
330 |
// since it is not known when the buffer can be used again) |
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|
331 |
if(iClientBuffer == iBuff1) |
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Revision: 200911
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|
332 |
{ |
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iClientBuffer = iBuff2; |
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} |
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else |
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{ |
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iClientBuffer = iBuff1; |
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} |
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|
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// Make sure the new client buffer is empty |
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iClientBuffer->Des().Zero(); |
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} |
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} |
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// --------------------------------------------------------- |
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// CBuffStorage::DoNonbufferingWriteL |
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// --------------------------------------------------------- |
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// |
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void CBuffStorage::DoNonbufferingWriteL(const TDesC8& aBuf) |
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{ |
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CLOG_WRITE_2("(%08X) CBuffStorage::DoNonbufferingWriteL: %d bytes", this, aBuf.Length()); |
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TInt len = aBuf.Length(); |
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if(len) |
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{ |
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User::LeaveIfError( iFile->Write( aBuf ) ); |
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if( iProgressiveDownload ) |
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{ |
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User::LeaveIfError( iFile->Flush() ); |
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} |
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// Update how much received from air |
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iBufferedSize += len; |
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|
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// Update how much written to file |
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iDownloadedSize += len; |
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} |
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} |
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// End of File |