Microsoft Internet Security and Acceleration Server 2004 SDK |
The SF_REQ_SET_NEXT_READ_SIZE form of the ServerSupportFunction callback function is used by raw-read Web filters to set the number of bytes that will be read during the next read event.
BOOL WINAPI * ServerSupportFunction( struct _HTTP_FILTER_CONTEXT* pfc, enum SF_REQ_TYPE sfReq, PVOID pData, DWORD ul1, DWORD ul2 );
This support function is meaningful only for filters that respond to raw-read notifications and that return the status code SF_STATUS_REQ_READ_NEXT from their entry-point function HttpFilterProc.
This support function is not relevant to the implementation of ISAPI in ISA Server. It is provided for compatibility with Internet Information Services (IIS). If you use it in an ISA Server Web filter, you should not assume that the number of bytes read during the subsequent read operation will not exceed the value set in the ul1 parameter.
For more information about the types of event notifications that are sent to Web filters, see Event Notifications.
Server: Requires Windows Server 2003 or
Windows 2000.
Version: Requires Internet Security and Acceleration
Server 2004.
Header: Declared in Wpxhttpfilt.h.