LISTING 2: Simple ISAPI Extension

Note: The symbol * signals a wrapped line.

Simple ISAPI Extension: Hello, I must be going!

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#include "httpext.h"

BOOL WINAPI DllMain(IN HINSTANCE hinstDll, IN DWORD dwReason, IN LPVOID
* lpvContext)

{

switch( dwReason ) {

case DLL_PROCESS_ATTACH:

break;

case DLL_PROCESS_DETACH:

break;

}

return(TRUE);

}

BOOL WINAPI GetExtensionVersion(OUT HSE_VERSION_INFO * pVer)

{

pVer->dwExtensionVersion = MAKELONG(HSE_VERSION_MINOR,
HSE_VERSION_MAJOR );

strcpy( pVer->lpszExtensionDesc,"IIS Simple ISAPI Extension" );

return TRUE;

}

DWORD WINAPI HttpExtensionProc(IN EXTENSION_CONTROL_BLOCK * pECB)

{

static char szMessage[] =

"<html>\r\n"

"<head>\r\n"

"<title>Hello World</title>\r\n"

"</head>\r\n\r\n"

"<body>\r\n"

"<p>Hello, I must be going!</p>\r\n"

"</body>\r\n"

"</html>\r\n";

HSE_SEND_HEADER_EX_INFO HeaderExInfo;

HeaderExInfo.pszStatus = "200 OK";

HeaderExInfo.pszHeader = "Content-type: text/html\r\n\r\n";

HeaderExInfo.cchStatus = strlen( HeaderExInfo.pszStatus );

HeaderExInfo.cchHeader = strlen( HeaderExInfo.pszHeader );

HeaderExInfo.fKeepConn = FALSE;

// send headers using IIS-provided callback

// (note - if we needed to keep connection open,

// we would set fKeepConn to TRUE *and* we would

// need to provide correct Content-Length: header)

pECB->ServerSupportFunction(

pECB->ConnID,

HSE_REQ_SEND_RESPONSE_HEADER_EX,

&HeaderExInfo,

NULL,

NULL

);

// Calculate length of string to output to client

DWORD dwBytesToWrite = strlen( szMessage );

// send text using IIS-provided callback

pECB->WriteClient( pECB->ConnID, szMessage, &dwBytesToWrite, 0 );

// Indicate that the call to HttpExtensionProc was successful

return HSE_STATUS_SUCCESS;

}

BOOL WINAPI TerminateExtension(IN DWORD dwFlags)

{

return TRUE;

}