applayerprotocols/httptransportfw/inc/framework/cprotocolhandler.h
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     1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 // please do not delete
       
    15 // 
       
    16 //
       
    17 
       
    18 /**
       
    19  @file CProtocolHandler.h
       
    20  @warning : This file contains Rose Model ID comments 
       
    21 */
       
    22 
       
    23 #ifndef __CPROTOCOLHANDLER_H__
       
    24 #define __CPROTOCOLHANDLER_H__
       
    25 
       
    26 // System includes
       
    27 #include <e32base.h>
       
    28 #include <http/framework/httplogger.h>
       
    29 #include <http/mhttpfilter.h>
       
    30 #include <http/rhttpsession.h>
       
    31 
       
    32 // Forward declarations
       
    33 class CHeaderCodec;
       
    34 class CProtTransaction;
       
    35 class CSecurityPolicy;
       
    36 class MProtHandlerInterface;
       
    37 
       
    38 /**
       
    39 The ECom protocol handler plugin interface UID.
       
    40 @publishedAll
       
    41 @released
       
    42 */
       
    43 const TUid KUidProtocolHandlerPluginInterface = {0x1000A449};
       
    44 
       
    45 // 
       
    46 /**
       
    47 Defined active object priorities for the Protocol Handler
       
    48 @publishedAll
       
    49 @released
       
    50 */
       
    51 const TInt KProtocolHandlerActivePriority = CActive::EPriorityStandard;
       
    52 /**
       
    53 Defined active object priorities for the Transaction
       
    54 @publishedAll
       
    55 @released
       
    56 */
       
    57 const TInt KTransactionActivePriority = KProtocolHandlerActivePriority+1;
       
    58 
       
    59 
       
    60 //##ModelId=3C4C186A02A3
       
    61 class CProtocolHandler : public CActive, public MHTTPFilter
       
    62 /**
       
    63 An abstract protocol handler.  Protocol handlers are required to
       
    64 act as the bridge between abstract representations of sessions, transactions and
       
    65 headers (the client side of the HTTP architecture) and specific comms transports
       
    66 (the network side of the architecture).
       
    67 
       
    68 Each instance of a concrete subclass of CProtocolHandler is associated
       
    69 with a specific	client session, and hence with a particular choice of proxy type,
       
    70 and by implication, transport type.  It is designed to appear like a filter in
       
    71 order to be placed at the end of a session's filter queue.  This allows it to 
       
    72 receive transaction-related events in the same way that any other filter
       
    73 (or indeed, the client) does.  An active object, it may implement a queuing
       
    74 system for submitted transactions, according to the chosen internal service
       
    75 model.
       
    76 
       
    77 In order to divide the abstract functionality associated with handling the HTTP
       
    78 protocol handler from the specifics needed for a particular choice of transport,
       
    79 this class defines a number of pure virtual methods which allow it to defer
       
    80 transport-specific choices or mechamisms.  These are mainly concerned with the
       
    81 service model (ie. allocation of transactions to objects that can handle them), the
       
    82 codec model (ie. on-demand encoding/decoding of	HTTP header data) and general
       
    83 housekeeping (eg. instantiation and cleanup of objects at particular points in
       
    84 a transaction lifecycle).
       
    85 @publishedAll
       
    86 @released
       
    87 */
       
    88 	{
       
    89 public:	// Methods
       
    90 
       
    91 /**	
       
    92 	Standard factory constructor. This is the ECOM interface class from
       
    93 	which concrete protocol handlers are derived. The method queries
       
    94 	ECOM for the protocol handler plugin that matches the protocol
       
    95 	description passed in.
       
    96 	@param			aProtocol	(in) The name of the protocol required.
       
    97 	@param			aSession	(in) The HTTP session on which this protocol handler
       
    98 									 will be installed.
       
    99 	@leave			KErrNoMemory if there was not enough memory to create the object.
       
   100 */
       
   101 	//##ModelId=3C4C186B007E
       
   102 	static CProtocolHandler* NewL(const TDesC8& aProtocol, RHTTPSession aSession);
       
   103 
       
   104 /**	
       
   105 	Intended Usage:	Class destructor.
       
   106 */
       
   107 	//##ModelId=3C4C186B0075
       
   108 	IMPORT_C virtual ~CProtocolHandler();
       
   109 
       
   110 /**	
       
   111 	Obtain the protocol handler's header codec.
       
   112 	@return			The header codec owned by this protocol handler, or NULL if one
       
   113 					has not yet been created.
       
   114 	@see CHeaderCodec
       
   115 */
       
   116 	//##ModelId=3C4C186B0074
       
   117 	IMPORT_C CHeaderCodec* Codec() const;
       
   118 
       
   119 
       
   120 /** 
       
   121 	Get the Server Certificate for the current session.
       
   122 	@return	The certificate information or NULL if it is not available
       
   123 */
       
   124 	IMPORT_C const CCertificate* SessionServerCert();
       
   125 
       
   126 /** 
       
   127 	Get the Server Certificate for the specified transaction.
       
   128 	@param	aTransaction The transaction for which the certificate is requested
       
   129 	@return	The certificate information or NULL if it is not available
       
   130 */
       
   131 	IMPORT_C const CCertificate* TransactionServerCert( RHTTPTransaction aTransaction);
       
   132 
       
   133 public:	// Methods to be implemented in specific protocol handlers
       
   134 
       
   135 /** 
       
   136 	Intended Usage:	Get the Server Certificate for the current session.
       
   137 	@param	aServerCert A TCertInfo which will be filled with the certificate information
       
   138 	@return	An error code.  KErrNone if aServerCert has been completed, otherwise one of 
       
   139 	the system wide error codes
       
   140 */
       
   141 	virtual TInt SessionServerCert(TCertInfo& aServerCert) = 0;
       
   142 
       
   143 /** 
       
   144 	Intended Usage:	Get the Server Certificate for the specified transaction.
       
   145 	@param	aServerCert A TCertInfo which will be filled with the certificate information
       
   146 	@param	aTransaction The transaction for which the certificate is requested
       
   147 	@return	An error code.  KErrNone if aServerCert has been completed, otherwise one of 
       
   148 			the system wide error codes
       
   149 */
       
   150 	virtual TInt TransactionServerCert(TCertInfo& aServerCert, RHTTPTransaction aTransaction) = 0;
       
   151 
       
   152 public:	// Methods from MHTTPFilterBase
       
   153 	
       
   154 /**
       
   155 	Intended Usage:	Called when the filter's registration conditions are satisfied for events that
       
   156 	occur on a transaction. Any Leaves must be handled by the appropriate MHFRunError.
       
   157 	Note that this function is not allowed to leave if called with certain events. 
       
   158 	@see THTTPEvent
       
   159 	@param aTransaction The transaction that the event has occurred on.
       
   160 	@param aEvent aEvent The event that has occurred.
       
   161 	@leave Standard Symbian OS error codes. e.g. KErrNoMemory.
       
   162 	@see MHTTPFilterBase	
       
   163 */
       
   164 	//##ModelId=3C4C186B0061
       
   165 	IMPORT_C virtual void MHFRunL(RHTTPTransaction aTransaction, const THTTPEvent& aEvent);
       
   166 
       
   167 /**
       
   168 	Intended Usage:	Called when the filters registration conditions are satisfied for events that occur
       
   169 	on the session. Any leaves must be handled by the appropriate MHFRunError.
       
   170 	@param aEvent The session event that has occured.
       
   171 	@leave KErrNoMemory if an attempt to allocate memory has failed
       
   172 	@leave KErrHttpCantResetRequestBody if the request body needed to be rewound by the client
       
   173 		   but it doesn't support this
       
   174 	@see MHTTPFilterBase
       
   175 */
       
   176 	//##ModelId=3C4C186B0057
       
   177 	IMPORT_C virtual void MHFSessionRunL(const THTTPSessionEvent& aEvent);
       
   178 
       
   179 /**
       
   180 	Intended Usage:	Called when RunL leaves from a transaction event. This works in the same
       
   181 	way as CActve::RunError; return KErrNone if you have handled the error.
       
   182 	If you don't completely handle the error, a panic will occur.
       
   183 	@param aError The leave code that RunL left with.
       
   184 	@param aTransaction The transaction that was being processed.
       
   185 	@param aEvent The Event that was being processed.
       
   186 	@return KErrNone if the error has been cancelled or the code
       
   187 			of the continuing error otherwise.
       
   188 	@see MHTTPFilterBase
       
   189 */
       
   190 	//##ModelId=3C4C186B0043
       
   191 	IMPORT_C virtual TInt MHFRunError(TInt aError, RHTTPTransaction aTransaction, const THTTPEvent& aEvent);
       
   192 
       
   193 /**
       
   194 	Intended Usage:	Called when MHFRunL leaves from a session event. This works in the same
       
   195 	way as CActve::RunError. If you don't completely handle the error, a panic will occur.
       
   196 	@param aError The leave code that RunL left with.
       
   197 	@param aEvent The Event that was being processed.
       
   198 	@return KErrNone if the error has been cancelled or the code
       
   199 			of the continuing error otherwise.	
       
   200 	@see MHTTPFilterBase
       
   201 */
       
   202 	//##ModelId=3C4C186B0038	
       
   203 	IMPORT_C virtual TInt MHFSessionRunError(TInt aError, const THTTPSessionEvent& aEvent);
       
   204 
       
   205 public:	// Methods from MHTTPFilter
       
   206 
       
   207 /** 
       
   208 	Intended Usage:	Called when the filter is being removed from a session's filter queue.
       
   209 	@param aSession The session it's being removed from
       
   210 	@param aHandle The filter handle. Complex filters may need to 
       
   211 				   refer to this to keep track of which particular registration is
       
   212 				   being unloaded.
       
   213 	@see MHTTFilter
       
   214 */
       
   215 	//##ModelId=3C4C186B0025
       
   216 	IMPORT_C virtual void MHFUnload(RHTTPSession aSession, THTTPFilterHandle aHandle);
       
   217 
       
   218 /** 
       
   219 	Intended Usage:	Called when the filter is being added to the session's filter queue.
       
   220 	@param aSession The session it's being added to.
       
   221 	@param aHandle The filter handle. Complex filters may need to keep
       
   222 				   track of this, for instance if generating events in response to
       
   223 				   external stimuli
       
   224 	@see MHTTFilter
       
   225  */
       
   226 	//##ModelId=3C4C186B001A
       
   227 	IMPORT_C virtual void MHFLoad(RHTTPSession aSession, THTTPFilterHandle aHandle);
       
   228 
       
   229 protected: // callbacks/methods for sub-classes
       
   230 
       
   231 /**	
       
   232 	Callback method for concrete protocol handler sub-classes to
       
   233 	inform the base protocol handler that a transaction has completed.
       
   234 	The concrete protocol handler must call this method in order to
       
   235 	supply a completion event that will be sent to the client.
       
   236 	In addition, the method allows the base protocol handler to do some
       
   237 	queue management.
       
   238 	@param			aTrans			(in) the completed transaction
       
   239 	@param			aEventStatus	(in) an event to be sent back to the client along
       
   240 										 the filter queue
       
   241 	@leave			THTTPPanic::EInvalidFilterHandle if unable to send event.
       
   242  */
       
   243 	//##ModelId=3C4C186B0010
       
   244 	IMPORT_C void TransactionCompletedL(RHTTPTransaction aTrans, THTTPEvent aEventStatus);
       
   245     IMPORT_C TInt TransactionCompleted(RHTTPTransaction aTrans, THTTPEvent aEventStatus);
       
   246 /**	
       
   247 	Obtain the number of currently active transactions
       
   248 	@return			The number of currently active transactions
       
   249  */
       
   250 	//##ModelId=3C4C186B0006
       
   251 	IMPORT_C TInt NumActiveTransactions() const;
       
   252 
       
   253 /**	
       
   254 	Callback method for concrete protocol handler sub-classes to
       
   255 	inform the base protocol handler that a transaction has failed
       
   256 	utterly. (i.e. the sub-class used aTrans.Fail().) The base protocol
       
   257 	handler sets the transaction state to be cancelled.
       
   258 	@param			aTrans			(in) the completed transaction
       
   259  */
       
   260 	//##ModelId=3C4C186A03E5
       
   261 	IMPORT_C void TransactionFailed(RHTTPTransaction aTrans);
       
   262 
       
   263 /**	
       
   264 	Completes this active object - allows the protocol handler to
       
   265 	reevaluate the queue of pending transactions and service new ones
       
   266 	if possible.
       
   267  */
       
   268 	//##ModelId=3C4C186A03E4
       
   269 	IMPORT_C void CompleteSelf();
       
   270 
       
   271 /**	
       
   272 	Searches the array of CProtTransaction objects to if the
       
   273 	aTransaction object is wrapped by one of them. If one is found aProtTransaction is set to it
       
   274 	@param aTransaction	The transaction to search for.
       
   275 	@param aProtTransaction	Reference to a CProtTransaction which will be set to the
       
   276 		   CProtTransaction which wraps the RHTTPTransaction.
       
   277 	@return If a CProtTransaction object is found, a positive value is
       
   278 			returned that is the index to that object in the array. If 
       
   279 			no object is found, KErrNotFound is returned.
       
   280  */
       
   281 	IMPORT_C TInt FindTransaction(RHTTPTransaction aTransaction, const CProtTransaction*& aProtTransaction) const;
       
   282 
       
   283 	IMPORT_C CProtTransaction* FindProtocolTransaction(RHTTPTransaction aTransaction) const;
       
   284 private: // methods to be implemented in specific protocol handlers
       
   285 
       
   286 /**	Intended usage:	Creates the specific type of codec required for a specific type
       
   287 					of protocol handler.
       
   288 					
       
   289 					This must be implemented by a concrete protocol handler sub-class.
       
   290  */
       
   291 	//##ModelId=3C4C186A03DC
       
   292 	virtual void CreateCodecL() = 0;
       
   293 
       
   294 /**	Intended Usage:	Creates a representation of a client transaction to be used in the
       
   295 					protocol handler.  Since the protocol handler deals with the low-
       
   296 					level data for a transaction as sent over a particular transport,
       
   297 					an appropriate CProtTransaction-derived class is used that owns a
       
   298 					CRxData and a CTxData to handle the low-level data.
       
   299 					
       
   300 					This must be implemented by a concrete protocol handler sub-class.
       
   301 	@leave			KErrNoMemory if there was not enough memory to create the object.
       
   302 					create the object.
       
   303 	@param			aTransaction	The RHTTPTransaction object associated with
       
   304 									this CProtTransaction object.
       
   305 	@return			A pointer to a created CProtTransaction-derived class.
       
   306 	@see			CRxData
       
   307 	@see			CTxData
       
   308  */
       
   309 	//##ModelId=3C4C186A03DA
       
   310 	virtual CProtTransaction* CreateProtTransactionL(RHTTPTransaction aTransaction) = 0;
       
   311 
       
   312 /**	Intended Usage:	Attempt to service the transaction.  This implies that the concrete
       
   313 					protocol handler will allocate some transport resources to the
       
   314 					transaction - which could fail if the protocol handler has hit an
       
   315 					internal limit of resources or bandwidth.
       
   316 					Implementations of this interface may leave with any of KErrHttpInvalidUri,
       
   317 					KErrGeneral, KErrNoMemory
       
   318 					
       
   319 					This must be implemented by a concrete protocol handler sub-class.
       
   320 	@param			aTrans	The pending protocol transaction object which is to be
       
   321 							serviced.
       
   322 	@return			A flag that indicates if the transaction can be serviced immediately.
       
   323  */
       
   324 	//##ModelId=3C4C186A03D0
       
   325 	virtual TBool ServiceL(CProtTransaction& aTrans) = 0;
       
   326 
       
   327 /**	Intended Usage:	Called when the RHTTPTransaction object corresponding to aTrans has
       
   328 					been closed by the client. This allows the concrete protocol handler
       
   329 					to do any cleanup required for this particular transaction.
       
   330 
       
   331 					Ownership of the CProtTransaction object is transferred back to the
       
   332 					concrete protocol handler, which then has deletion responsibility
       
   333 					for it.  By the time this function has been called, the base
       
   334 					protocol handler will have dequeued the transaction.
       
   335 					
       
   336 					The client's RHTTPTransaction will be closed when this function
       
   337 					returns,  so it is not possible to send events to the client during
       
   338 					the function's execution.
       
   339 					
       
   340 					This must be implemented by a concrete protocol handler sub-class.
       
   341 	@param			aTrans		(in) A pointer to the transaction about to be closed.
       
   342  */
       
   343 	//##ModelId=3C4C186A03C6
       
   344 	virtual void ClosedTransactionHook(CProtTransaction* aTrans) = 0;
       
   345 
       
   346 /**	Intended Usage:	Called when the RHTTPTransaction object corresponding to aTrans has
       
   347 					been cancelled by the client or an intermediate filter. This allows
       
   348 					the concrete protocol handler to do any cleanup and to perform the
       
   349 					necessary actions for cancellation on its transport layer.
       
   350 					
       
   351 					This must be implemented by a concrete protocol handler sub-class.
       
   352 	@param			aTrans		(in) A reference to the transaction being cancelled.
       
   353  */
       
   354 	//##ModelId=3C4C186A03B3
       
   355 	virtual void CancelTransactionHook(CProtTransaction& aTransaction) = 0;
       
   356 
       
   357 /**	Intended Usage:	Called to notify the concrete protocol handler that new request
       
   358 					body data is available for transmission.
       
   359 					
       
   360 					This must be implemented by a concrete protocol handler sub-class.
       
   361 	@param			aTrans		(in) A reference to the transaction whose request body
       
   362 									 has new data available.
       
   363  */
       
   364 	//##ModelId=3C4C186A03A8
       
   365 	virtual void NotifyNewRequestBodyPart(CProtTransaction& aTransaction) = 0;
       
   366 
       
   367 protected: // Methods inherited from CActive
       
   368 
       
   369 /**	Intended Usage:	Do some processing when a previous asynchronous request made by
       
   370 					this object has completed.
       
   371  */
       
   372 	//##ModelId=3C4C186A0377
       
   373 	IMPORT_C virtual void RunL();
       
   374 
       
   375 /**	Intended Usage:	Do any cleanup required should RunL leave
       
   376 	@param			aError		(in) The error code that RunL left with
       
   377 	@return			A final error code - KErrNone if the error was handled by this
       
   378 					method.
       
   379  */
       
   380 	//##ModelId=3C4C186A036E
       
   381 	IMPORT_C virtual TInt RunError(TInt aError);
       
   382 
       
   383 /**	Intended Usage:	Cancel outstanding asynchronous requests that this object has made
       
   384  */
       
   385 	//##ModelId=3C4C186A036D
       
   386 	IMPORT_C virtual void DoCancel();
       
   387 
       
   388 protected:	// Methods
       
   389 
       
   390 /**	
       
   391 	Constructs a protocol handler associated with the supplied HTTP
       
   392 	client session.
       
   393 	@param			aSession	(in) The session on which the new protocol handler will
       
   394 									 be installed.
       
   395  */
       
   396 	IMPORT_C CProtocolHandler(RHTTPSession aSession);
       
   397 
       
   398 /**	
       
   399 	Second phase construction in which any necessary allocation is done
       
   400 	Implementations of this interface may leave with KErrNoMemory
       
   401 	@param aSession The HTTP session on which this protocol handler
       
   402 		   will be installed.
       
   403  */
       
   404 	//##ModelId=3C4C186A036C
       
   405 	IMPORT_C void ConstructL(RHTTPSession aSession);
       
   406 
       
   407 protected: // Attributes
       
   408 
       
   409 	/** The session to which this protocol handler is dedicated
       
   410 	*/
       
   411 	//##ModelId=3C4C186A033C
       
   412 	RHTTPSession iSession;
       
   413 
       
   414 	/** The codec used for this protocol handler (to be specialised in subclasses)
       
   415 	*/
       
   416 	//##ModelId=3C4C186A032F
       
   417 	CHeaderCodec* iCodec;
       
   418 
       
   419 	/** HTTP logger handle (debug only)
       
   420 	*/
       
   421 	__DECLARE_LOG
       
   422 
       
   423 	/** An interface providing the security policy. This may be NULL if there is no security policy plugin */
       
   424 	//##ModelId=3C4C186A031D
       
   425 	CSecurityPolicy* iSecurityPolicy;	
       
   426 
       
   427 private: // Methods
       
   428 
       
   429 /**	
       
   430 	Called after a client RHTTPTransaction::SubmitL(), this method
       
   431 	enqueues the supplied client transaction.  It checks to see if there
       
   432 	already exists a CProtTransaction for this transaction. If there is
       
   433 	and its state is ECancelled, then the associated request data is
       
   434 	reset and the state changed to EPending. A CompleteSelf() is issued.
       
   435 	In the case of an existing CProtTransaction that has not been
       
   436 	cancelled, the submit event is ignored. If no CProtTransaction
       
   437 	object existed, then one is created for the transaction and a
       
   438 	CompleteSelf() is issued.
       
   439 	@leave			KErrHttpCantResetRequestBody if the request body data cannot
       
   440 					be reset. KErrNoMemory if a new CProtTransaction cannot be
       
   441 					created or added to the transaction queue.
       
   442 	@param			aTransaction	The submitted transaction.
       
   443 	@pre 			None
       
   444 	@post			If there is a new pending CProtTransaction object the protocol
       
   445 					handler will have been self-completed (i.e. the RunL will be 
       
   446 					called).
       
   447  */
       
   448 	//##ModelId=3C4C186A0362
       
   449 	void SubmitTransactionL(RHTTPTransaction aTransaction);
       
   450 
       
   451 /**	
       
   452 	Sets the state of the CProtTransaction object for this 
       
   453 	transaction to ECancelled, and resets the object. This
       
   454 	object can be reused if the transaction is resubmitted.
       
   455 	@param			RHTTPTransaction aTrans
       
   456 	@pre 			A CProtTransaction object exists for this transaction.
       
   457 	@post			The state of the CProtTransaction object is set to ECancelled 
       
   458 					and it has been reset.
       
   459  */
       
   460 	//##ModelId=3C4C186A0359
       
   461 	void HandleCancelTransaction(RHTTPTransaction aTrans);
       
   462 
       
   463 /**	
       
   464 	Removes the CProtTransaction object for the transaction
       
   465 	from the queue of CProtTransaction objects.
       
   466 	@param			RHTTPTransaction aTrans
       
   467 	@pre 			A CProtTransaction object exists for this transaction.
       
   468 	@post			The CProtTransaction object has been removed from the queue.
       
   469  */
       
   470 	//##ModelId=3C4C186A034F
       
   471 	void HandleClosedTransaction(RHTTPTransaction aTrans);
       
   472 
       
   473 /**	
       
   474 	Searches the array of CProtTransaction objects to if the
       
   475 	aTransaction object is wrapped by one of them.
       
   476 	@param			aTransaction	The transaction to search for.
       
   477 	@return			If a CProtTransaction object is found, a positive value is
       
   478 					returned that is the index to that object in the array. If 
       
   479 					no object is found, KErrNotFound is returned.
       
   480  */
       
   481 	//##ModelId=3C4C186A0346
       
   482 	TInt FindTransaction(RHTTPTransaction aTransaction) const;
       
   483 
       
   484 protected:
       
   485 /**	
       
   486 	Intended Usage: This is a mechanism for allowing future change to CProtocolHandler API 
       
   487 	without breaking BC.
       
   488 	@param aInterfaceId		the UID of the API function being called.
       
   489 	@param aInterfacePtr	reference to pointer to actual function implementation (in the derived class)
       
   490  */
       
   491 	inline virtual void GetInterfaceL(TUid aInterfaceId, MProtHandlerInterface*& aInterfacePtr);
       
   492 
       
   493 public:
       
   494 /**	Intended Usage:	Reserve a slot in the v-table to preserve future BC
       
   495  */
       
   496 	//##ModelId=3C4C186A0344
       
   497 	inline virtual void Reserved2();
       
   498 
       
   499 
       
   500 private: // Attributes
       
   501 
       
   502 	/** A list of transactions. Each transaction has a list state, e.g. pending,
       
   503 		active, etc.
       
   504 	*/
       
   505 	//##ModelId=3C4C186A0313
       
   506 	RPointerArray<CProtTransaction>		iTransactions;
       
   507 
       
   508 	/**	The transaction which is currently being serviced - used in RunError so 
       
   509 		we know which transaction caused RunL to leave.
       
   510 	*/
       
   511 	//##ModelId=3C4C186A02FF
       
   512 	RHTTPTransaction					iCurrentTransaction;
       
   513 
       
   514 	/** The destructor key UID indentification required by ECom
       
   515 	*/
       
   516 	//##ModelId=3C4C186A02F5
       
   517 	TUid iDtor_ID_Key;
       
   518 	};
       
   519 
       
   520 
       
   521 	
       
   522 /**
       
   523 Interface for adding to ProtocolHandler API
       
   524 @publishedAll
       
   525 @released
       
   526 */
       
   527 
       
   528 const TInt KProtHandlerSessionServerCertUid		= 0x1028180D;
       
   529 const TInt KProtHandlerTransactionServerCertUid	= 0x1028180E;
       
   530 
       
   531 class MProtHandlerInterface
       
   532 	{
       
   533 public:
       
   534 	/** 
       
   535 	Intended Usage: Get the Server Certificate for the current session.
       
   536 	@return	The certificate information or NULL if it is not available
       
   537 	*/
       
   538 	virtual const CCertificate*  SessionServerCert() = 0;
       
   539 
       
   540 	/** 
       
   541 	Intended Usage: Get the Server Certificate for the specified transaction.
       
   542 	@param	aTransaction The transaction for which the certificate is requested
       
   543 	@return	The certificate information or NULL if it is not available
       
   544 	*/
       
   545 	virtual const CCertificate* TransactionServerCert( RHTTPTransaction aTransaction) = 0;
       
   546 	};
       
   547 
       
   548 inline void CProtocolHandler::GetInterfaceL(TUid, MProtHandlerInterface*&)
       
   549 	{}
       
   550 
       
   551 inline void CProtocolHandler::Reserved2()
       
   552 	{}
       
   553 
       
   554 #endif // __CPROTOCOLHANDLER_H__