/***********************************************************************
SendHdrX.c
Sample ISAPI Extension demonstrating:
ServerSupportFunction( HSE_REQ_SEND_RESPONSE_HEADER_EX )
***********************************************************************/
#include <windows.h>
#include <objbase.h>
#include <iisext.h>
#include <stdio.h>
/*---------------------------------------------------------------------*
GetExtensionVersion
IIS calls this entry point to load the ISAPI DLL.
Returns:
TRUE on success
Side effects:
None.
*/
BOOL WINAPI
GetExtensionVersion(
HSE_VERSION_INFO *pVer
)
{
pVer->dwExtensionVersion =
MAKELONG( HSE_VERSION_MINOR, HSE_VERSION_MAJOR );
lstrcpyn(
pVer->lpszExtensionDesc
, "ISAPI SendHeaderEx sample"
, HSE_MAX_EXT_DLL_NAME_LEN
);
return TRUE;
}
/*---------------------------------------------------------------------*
HttpExtensionProc
IIS calls this entry point to process a browser request.
Returns:
TRUE on success
Side effects:
None.
*/
DWORD WINAPI
HttpExtensionProc(
EXTENSION_CONTROL_BLOCK *pECB
)
{
HSE_SEND_HEADER_EX_INFO SendHeaderExInfo;
DWORD cchStatus;
DWORD cchHeader;
DWORD cchContent;
//
// NOTE we must send Content-Length header with correct byte count
// in order for keep-alive to work.
//
char szStatus[] = "200 OK";
char szContent[] = "<html>"
"<br> Usage:"
"<br> To keep connection alive: http://localhost/vdir/SendHdrX.dll?Keep-Alive"
"<br> To close connection: http://localhost/vdir/SendHdrX.dll"
"</html>";
char szHeaderBase[] = "Content-Length: %lu\r\nContent-type: text/html\r\n\r\n";
char szHeader[4096];
cchStatus = lstrlen(szStatus);
cchHeader = lstrlen(szHeader);
cchContent = lstrlen(szContent);
//
// fill in byte count in Content-Length header
//
sprintf( szHeader, szHeaderBase, cchContent );
//
// Populate SendHeaderExInfo struct
//
SendHeaderExInfo.pszStatus = szStatus;
SendHeaderExInfo.pszHeader = szHeader;
SendHeaderExInfo.cchStatus = cchStatus;
SendHeaderExInfo.cchHeader = cchHeader;
SendHeaderExInfo.fKeepConn = FALSE;
if ( 0 == lstrcmpi( pECB->lpszQueryString , "Keep-Alive" ) ) {
SendHeaderExInfo.fKeepConn = TRUE;
}
//
// Send header
//
if ( !pECB->ServerSupportFunction(
pECB->ConnID
, HSE_REQ_SEND_RESPONSE_HEADER_EX
, &SendHeaderExInfo
, NULL
, NULL
) ) {
return HSE_STATUS_ERROR;
}
//
// Send content
//
if( !pECB->WriteClient(pECB->ConnID, szContent, &cchContent, 0) ) {
return HSE_STATUS_ERROR;
}
return HSE_STATUS_SUCCESS;
}
/*---------------------------------------------------------------------*
DllMain
Main entry point into the DLL. Called by system on DLL load
and unload.
Returns:
TRUE on success
Side effects:
None.
*/
BOOL WINAPI
DllMain(
HINSTANCE hinstDLL
, DWORD fdwReason
, LPVOID lpvReserved
)
{
return TRUE;
}
/*---------------------------------------------------------------------*
TerminateExtension
IIS calls this entry point to unload the ISAPI DLL.
Returns:
NONE
Side effects:
Uninitializes the ISAPI DLL.
*/
BOOL WINAPI
TerminateExtension(
DWORD dwFlag
)
{
return TRUE;
}
/***************************** End of File ****************************/