applayerprotocols/httptransportfw/inc/http/mhttpfilterbase.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 //
       
    15 
       
    16 /**
       
    17  @file
       
    18  @warning : This file contains Rose Model ID comments - please do not delete
       
    19 */
       
    20 
       
    21 #ifndef	__MHTTPFILTERBASE_H__
       
    22 #define	__MHTTPFILTERBASE_H__ 
       
    23 
       
    24 // System includes
       
    25 #include <e32std.h>
       
    26 
       
    27 // Forward declarations
       
    28 class RHTTPTransaction;
       
    29 class THTTPEvent;
       
    30 class THTTPSessionEvent;
       
    31 
       
    32 
       
    33 //##ModelId=3A914DF9034F
       
    34 class MHTTPFilterBase
       
    35 /** 
       
    36 A HTTP Filter. This is the base class for normal filters
       
    37 (MHTTPFilter) which adds an unload function, and
       
    38 MHTTPTransactionCallback, which doesn't add an unload function.  
       
    39 @publishedAll
       
    40 @released
       
    41 */
       
    42 	{
       
    43 public:
       
    44 	/** Called when the filter's registration conditions are satisfied for events that
       
    45 		occur on a transaction. Any Leaves must be handled by the appropriate MHFRunError.
       
    46 		Note that this function is not allowed to leave if called with
       
    47 		certain events. @see THTTPEvent
       
    48 		@param aTransaction The transaction that the event has occurred on.
       
    49 		@param aEvent The event that has occurred.
       
    50 	*/
       
    51 	//##ModelId=3A914DF9035D
       
    52 	IMPORT_C virtual void MHFRunL(RHTTPTransaction aTransaction, const THTTPEvent& aEvent);
       
    53 
       
    54 	/** Called when the filters registration conditions are satisfied for events that occur
       
    55 		on the session. Any leaves must be handled by the appropriate MHFRunError.
       
    56 		@param aEvent The session event that has occured.
       
    57 	*/
       
    58 	//##ModelId=3C4C37D401C1
       
    59 	IMPORT_C virtual void MHFSessionRunL(const THTTPSessionEvent& aEvent);
       
    60 
       
    61 	/** Called when RunL leaves from a transaction event. This works in the same
       
    62 		way as CActve::RunError; return KErrNone if you have handled the error.
       
    63 		If you don't completely handle the error, a panic will occur.
       
    64 		@param aError The leave code that RunL left with.
       
    65 		@param aTransaction The transaction that was being processed.
       
    66 		@param aEvent The Event that was being processed.
       
    67 		@return KErrNone if the error has been cancelled or the code
       
    68 		of the continuing error otherwise.
       
    69 	*/
       
    70 	//##ModelId=3A914DF90359
       
    71 	IMPORT_C virtual TInt MHFRunError(TInt aError, RHTTPTransaction aTransaction, const THTTPEvent& aEvent);
       
    72 
       
    73 	/** Called when MHFRunL leaves from a session event. This works in the same
       
    74 		way as CActve::RunError
       
    75 		If you don't completely handle the error, a panic will occur.
       
    76 		@param aError The leave code that RunL left with.
       
    77 		@param aEvent The Event that was being processed.
       
    78 		@return KErrNone if the error has been cancelled or the code
       
    79 		of the continuing error otherwise.	
       
    80 	*/
       
    81 	//##ModelId=3C4C37D302C4
       
    82 	IMPORT_C virtual TInt MHFSessionRunError(TInt aError, const THTTPSessionEvent& aEvent);
       
    83  	};
       
    84 
       
    85 
       
    86 #endif //	 __MHTTPFILTERBASE_H__