// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

//

#ifndef __CMESSAGEPARSERDRIVER_H__

#define __CMESSAGEPARSERDRIVER_H__

#include <e32base.h>

#include <rhttpmessageparser.h>

#include <mhttpmessageparserobserver.h>

#include "mdatasupplierobserver.h"

class CMessageDataSupplier;

class MDriverObserver;

class CMessageParserDriver : public CActive,

							 public MHttpMessageParserObserver,

							 public MDataSupplierObserver

	{

public:	// methods

	static CMessageParserDriver* NewL(MDriverObserver& aObserver);

	virtual ~CMessageParserDriver();

	void SetMessageData(const TDesC8& aMessageData);

	void SetStartLine(const TDesC8& aStartLine);

	void SetHeaderL(const TDesC8& aFieldName, const TDesC8& aFieldValue);

	void SetBodyData(const TDesC8& aBodyData, TBool aIsChunked, TBool aIsUnknownLength = EFalse);

	void SetTrailerL(const TDesC8& aFieldName, const TDesC8& aFieldValue);

	void Start(TInt aExpectedError, TBool aTestReset = EFalse);

private:	// methods from CActive

	virtual void RunL();

	virtual void DoCancel();

	virtual TInt RunError(TInt aError);

private:	// methods from MHttpMessageParserObserver

	virtual void GetDataPacket(TPtrC8& aData);

	virtual void ReleaseDataPacket();

	virtual void StartLineL(const TDesC8& aStartLine);

	virtual void HeaderL(const TDesC8& aFieldName, TDesC8& aFieldValue);

	virtual TInt BodySizeL();

	virtual void BodyChunkL(const TDesC8& aData);

	virtual void BodyCompleteL();

	virtual void MessageCompleteL(const TPtrC8& aExcessData);

	virtual TInt HandleParserError(TInt aError);

	virtual void Reserved_MHttpMessageParserObserver();

private:	// methods from MDataSupplierObserver

	virtual void DataReady();

private:	// enums

	enum TMessageState

		{

		EPendingStartLine			= 0,

		EPendingHeaders,

		EPendingBodySize,

		EPendingBody,

		EPendingBodyComplete,

		EPendingTrailers,

		EPendingMessageComplete,

		EDone

		};

	enum TEntityBodyState

		{

		ENoEntityBody				= 0,

		ENonEncodedBody,

		EChunkEncodedBody,

		EUnknownBodyLength

		};

private:	// helper classes

	class THeaderField

		{

	public:	// methods

		THeaderField() : iName(0, NULL), iValue(0, NULL) {}

		THeaderField(const TDesC8& aName, const TDesC8& aValue) : iName(aName), iValue(aValue) {};

		THeaderField& operator=(const THeaderField& aField) { this->iName.Set(aField.iName); this->iValue.Set(aField.iValue); return *this; }

	public:	// attributes

		TPtrC8		iName;

		TPtrC8		iValue;

		};

private:	// methods

	CMessageParserDriver(MDriverObserver& aObserver);

	void ConstructL();

	void CompleteSelf();

	void DoReset();

private:

	MDriverObserver&		iObserver;

	RHttpMessageParser		iMessageParser;

	CMessageDataSupplier*	iDataSupplier;

	TMessageState			iState;

	TPtrC8					iMessageData;

	TPtrC8					iStartLine;

	TPtrC8					iEntityBody;

	TPtrC8					iExpectBodyData;

	TEntityBodyState		iExpectBodyState;

	RArray<THeaderField>	iHeaders;

	TInt					iHeaderIndex;

	RArray<THeaderField>	iTrailers;

	TInt					iTrailerIndex;

	TInt					iExpectedError;

	TInt					iBufferSize;

	TBool					iTestFailed;

	TInt					iResetIndex;

	TInt					iBodyIndex;

	TBool					iDoReset;

	TBool					iReset;

	TMessageState			iResetState;

	TInt					iChunkCount;

	TInt					iChunkIndex;

	TBool					iIsUnknownLength;

	};

#endif	// __CMESSAGEPARSERDRIVER_H__