// Copyright (c) 2003-2009 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 __CHTTPCLIENTFILTER_H__

#define __CHTTPCLIENTFILTER_H__

#include <http/mhttpfilter.h>

#include <http/rhttpsession.h>

#include <stringpool.h>

/** Acts as a filter above the HTTP Protocol Handler

	This filter alters request and responses where necessary to ensure complaince with

	various sections of RFC 2616

*/

class CHttpClientFilter : public CBase, 

						  public MHTTPFilter

	{

public:

	static CHttpClientFilter* NewL(RHTTPSession aSession);

	virtual ~CHttpClientFilter();

private:	// methods from MHTTPFilterBase

	virtual void MHFRunL(RHTTPTransaction aTransaction, const THTTPEvent& aEvent);

	virtual void MHFSessionRunL(const THTTPSessionEvent& aEvent);

	virtual TInt MHFRunError(TInt aError, RHTTPTransaction aTransaction, const THTTPEvent& aEvent);

	virtual TInt MHFSessionRunError(TInt aError, const THTTPSessionEvent& aEvent);

private:	// methods from MHTTPFilter

	virtual void MHFUnload(RHTTPSession aSession, THTTPFilterHandle aHandle);

	virtual void MHFLoad(RHTTPSession aSession, THTTPFilterHandle aHandle);

 private:

	CHttpClientFilter();

	void ConstructL(RHTTPSession aSession);

	void AlterRequestHeadersL(RHTTPTransaction aTransaction);

	void AlterResponseHeadersL(RHTTPTransaction aTransaction);

	void EnsureContentTypePresentL(RHTTPTransaction aTransaction);

	void EnsurePathExistsL(RHTTPTransaction aTransaction);

	void EnsureContentLengthL(RHTTPTransaction aTransaction);

	void EnsureNoEndToEndHeadersInConnectionHeaderL(RHTTPTransaction aTransaction);

	TBool IsHopByHopHeader(RStringF aHeaderName);

	void AddExpect100ContinueL(RHTTPTransaction aTransaction);

	void AddSessionHeadersL(RHTTPHeaders aTransactionHeaders, RHTTPHeaders aSessionHeaders);

 private:

     const TStringTable& iStringTable;

	TInt			iLoadCount;

	RStringPool		iStringPool;

	RHTTPSession	iSession;

	};

// Inlined as it's only called in 1 place.

inline CHttpClientFilter* CHttpClientFilter::NewL(RHTTPSession aSession)

	{

	CHttpClientFilter* self = new (ELeave) CHttpClientFilter;

	CleanupStack::PushL(self);

	self->ConstructL(aSession);

	CleanupStack::Pop(self); 

	return self;

	}

#endif	// __CHTTPCLIENTFILTER_H__