|Microsoft Internet Security and Acceleration Server 2000|
This support function allows your Web (ISAPI) filter to add specified headers to the server error response, in the event that the HTTP request is denied by the server. This allows an authentication filter to advertise its services without filtering every request.
Note This support function will not work properly if called during the processing of a SF_NOTIFY_SEND_RAW_DATA notification.
BOOL WINAPI * ServerSupportFunction( PHTTP_FILTER_CONTEXT pfc, enum SF_REQ_TYPE SF_REQ_ADD_HEADERS_ON_DENIAL, PVOID pData, DWORD ul1, DWORD ul2 );
Generally, the HTTP headers should be WWW-Authenticate headers that specify custom authentication schemes. However, no restriction is placed on which headers can be specified. The ISA Web proxy service will advertise both Basic and integrated Windows authentication, individually and collectively, if those authentication schemes are enabled.