// Copyright (c) 2001-2009 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:

// ocsptransport.h

// Declare implementations of OCSP transport interface.  Links the OCSP module

// to the HTTP module.

// 

//

/**

 @file

 @internalTechnology

*/

#ifndef __OCSP_TRANSPORT_HTTP_H__

#define __OCSP_TRANSPORT_HTTP_H__

#include <e32std.h>

#include <ocsp.h>

#include <http.h>

#include <uri8.h>

#include <callbacktimer.h>

#include <http/rexplicithttpsession.h>

#include <ocsprequestandresponse.h>

// Forward declaration

class CTransportTimer;

/**

 * OCSP transport object that uses the default transport appropriate to the

 * request URI.  Currently, only HTTP POST is supported.

 */

class COCSPTransportDefault : public CBase, public MOCSPTransport

	{

public:

	/**

	 * Create a new instance of the transport.

	 * @leave OCSP::KErrInvalidURI If the URI is not supported.

	 */

	IMPORT_C static COCSPTransportDefault* NewL(TUint32& aIap);

	virtual ~COCSPTransportDefault();

private:

	COCSPTransportDefault(TUint32& aIap);

	// Methods from MOCSPTransport

	virtual void SendRequest(const TDesC8& aURI, 

							const TDesC8& aRequest,

							const TInt aTimeout,

							TRequestStatus& iStatus);

	virtual void CancelRequest();

	virtual TPtrC8 GetResponse() const;

private:

	// Use string pool for case-independent comparisons....

	enum TTransportScheme

		{

		ETransportSchemeNotSupported,

		ETransportSchemeHTTP

		};

	static TTransportScheme IdentifySchemeL(const TDesC8& aURI);

	void CreateTransportL(const TDesC8& aURI);

private:

	MOCSPTransport* iTransport;

	TTransportScheme iScheme;

	TUint32& iIap;

	};

enum THTTPTransportState

	{

	ETransportConnectingState,

	ETransportSendRequestState

	};

/**

 * OCSP transport object that send requests via HTTP GET or POST depending on size of the request

 */

class COCSPTransportHttp :	public CActive, 

							public MOCSPTransport,

							public MHTTPDataSupplier,

							public MHTTPTransactionCallback,

							public MTimerObserver

	{

public:

	/**

	 * Create a new instance of the HTTP POST transport.

	 */

	IMPORT_C static COCSPTransportHttp* NewL(const TDesC8& aUri, TUint32& aIap);

	~COCSPTransportHttp();

private:

	COCSPTransportHttp(TUint32& aIap);

	void ConstructL(const TDesC8& aUri);

	// Methods from MOCSPTransport

	void SendRequest(const TDesC8& aURI, 

					const TDesC8& aRequest,

					const TInt aTimeout,

					TRequestStatus& iStatus);

	void CancelRequest();

	TPtrC8 GetResponse() const;

	// From CActive

	void RunL();

	void DoCancel();

	TInt RunError(TInt aError);

	// Methods from MHTTPDataSupplier

	TBool GetNextDataPart(TPtrC8& aDataPart);

	void ReleaseData();

	TInt OverallDataSize();

	TInt Reset();

	// Methods from MHTTPTransactionCallback

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

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

	// Methods from MTransportTimer

	void TimerRun(TInt aError);

private:

	// Internal methods

	void InstallHttpFilterL();

	void DoSendRequestL(const TDesC8& aURI, 

						const TDesC8& aRequest);

	void AddHttpHeadersL();

	void ProcessHeadersL();

	void ProcessDataL();

	void CheckDataCompleteL() const;

	void SetIAPL();

	void Complete(TInt aError);

	void AbortTransaction(TInt aError);

private:

	TRequestStatus* iCallBack;

	// Data to send, from OCSP module

	TPtrC8 iOCSPRequest;

	TUriParser8 iURI;

	RExplicitHTTPSession iHTTPSession;

	RHTTPTransaction iHTTPTransaction;

	// request data

	HBufC8* iUri;

	HBufC8* iRequest;

	// The data in the response

	HBufC8* iResponseData;

	TInt iResponseLength;

	TUint32& iIap;

	THTTPTransportState iState;

	// ETrue if HTTP GET method support should be enabled (default is EFalse)

	TBool iUseHTTPGETMethod;

	// Timer class

	CCallbackTimer* iTimer;

	// Flag to indicate whether we were able to contact the responder

	TBool iServerFound;

	// Reponse timeout out value in Milliseconds

	TInt iTimeout;

	};

#endif // __OCSP_TRANSPORT_HTTP_H__