HTTP_FILTER_PREPROC

HTTP_FILTER_PREPROC_HEADERS

IIS includes a pointer to this structure when it is preprocessing a request's headers. If your filter should be notified for this event, it should register for the SF_NOTIFY_PREPROC_HEADERS event.

typedef struct _HTTP_FILTER_PREPROC_HEADERS {

BOOL (WINAPI * GetHeader);

BOOL (WINAPI * SetHeader);

BOOL (WINAPI * AddHeader);

DWORD HttpStatus;

DWORD dwReserved;

} HTTP_FILTER_PREPROC_HEADERS, *PHTTP_FILTER_PREPROC_HEADERS;

Members

GetHeader: Points to the GetHeader function, which retrieves the specified header value. Header names should include the trailing colon (:). The special values method, URL, and version can be used to retrieve the individual portions of the request line. The special values are case sensitive and must not include the trailing colon.
SetHeader: Points to the SetHeader function, which changes or deletes the value of a header. The function can be used to change the special values included in the request line.
AddHeader: Points to the AddHeader function to add a header to the response.
HttpStatus: The current HTTP status code.
dwReserved: A DWORD reserved for later use.

Remarks

When the server is about to process the client headers, this structure is pointed to by the pvNotification parameter in the HttpFilterProc when the notificationType parameter is set to SF_NOTIFY_PREPROC_HEADERS.