ISAPI https redirect not working

[merrittr]

Hi All I am trying to build a rwrite ISAPI filter that will replace
the word ".oldserv."
whith ".ourserv." and then redirect the user to the new string. The
code below works for http connections I would like it to work for
https connections can you help?

// REDIRECTOR.CPP - Implementation file for your Internet Server
// redirector Filter

#include "stdafx.h"
#include "redirector.h"
#define REDIRECT_TO "mail.ourserv.com/exchange"

///////////////////////////////////////////////////////////////////////
// The one and only CRedirectorFilter object

CRedirectorFilter theFilter;
//robm
HANDLE m_hLogFile = INVALID_HANDLE_VALUE;
//robm

///////////////////////////////////////////////////////////////////////
// CRedirectorFilter implementation

CRedirectorFilter::CRedirectorFilter()
{
}

CRedirectorFilter::~CRedirectorFilter()
{
// close the file
CloseHandle(m_hLogFile);
}

BOOL CRedirectorFilter::GetFilterVersion(PHTTP_FILTER_VERSION pVer)
{
CHAR rgchBuff[1024];
DWORD cb;
//robm
if (m_hLogFile == INVALID_HANDLE_VALUE)
{
m_hLogFile = CreateFileW(L"c:\\redirector1.log",
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_ALWAYS,
0,
NULL);

if (m_hLogFile != INVALID_HANDLE_VALUE)
{
if (SetFilePointer(m_hLogFile, 0, NULL, FILE_END) == (DWORD) -1L)
{
CloseHandle(m_hLogFile);
m_hLogFile = INVALID_HANDLE_VALUE;
}
else
{
CTime t = CTime::GetCurrentTime();
cb = wsprintf(rgchBuff, "--> log started %s\n", t.Format("%m/%d/%y
%H:%M:%S"));
DWORD cbWritten = 0;
WriteFile(m_hLogFile,
rgchBuff,
cb,
&cbWritten,
NULL);
}
}
}
//robm

// Call default implementation for initialization
CHttpFilter::GetFilterVersion(pVer);

// Clear the flags set by base class
pVer->dwFlags &= ~SF_NOTIFY_ORDER_MASK;

// Set the flags we are interested in
pVer->dwFlags |= SF_NOTIFY_ORDER_HIGH | SF_NOTIFY_SECURE_PORT |
SF_NOTIFY_NONSECURE_PORT | SF_NOTIFY_PREPROC_HEADERS |
SF_NOTIFY_END_OF_NET_SESSION;

// Load description string
TCHAR sz[SF_MAX_FILTER_DESC_LEN+1];
ISAPIVERIFY(::LoadString(AfxGetResourceHandle(),
IDS_FILTER, sz, SF_MAX_FILTER_DESC_LEN));
_tcscpy(pVer->lpszFilterDesc, sz);
return TRUE;
}

DWORD CRedirectorFilter::OnPreprocHeaders(CHttpFilterContext* pCtxt,
PHTTP_FILTER_PREPROC_HEADERS pHeaderInfo)
{
DWORD cb;
DWORD cbWritten = 0;
CHAR rgchBuff[1024];
char buffer[256], szTemp [256], buffer2[2048];

DWORD buffSize = sizeof(buffer);
DWORD buffSize2 = sizeof(buffer2);
BOOL bHeader = pHeaderInfo->GetHeader(pCtxt->m_pFC, "url", buffer,
&buffSize);

CTime t = CTime::GetCurrentTime();
pCtxt->GetServerVariable ("SERVER_NAME", buffer2,&buffSize2);
CString serverString(buffer2);
CString urlString(buffer);
urlString.MakeLower(); // for this exercise
serverString.MakeLower(); // for this exercise
cb = wsprintf(rgchBuff, "%s : outside %s %s\n",t.Format("%m/%d/%y
%H:%M:%S"), serverString, urlString);
WriteFile(m_hLogFile, rgchBuff, cb,&cbWritten, NULL);
if (serverString.Find("mail.oldserv") != -1) //we want to redirect
this file
{
serverString.Replace(".oldserv.",".ourserv.");
wsprintf (szTemp, "Location: https://%s\r\n\r\n",REDIRECT_TO);
pCtxt->ServerSupportFunction (SF_REQ_SEND_RESPONSE_HEADER,(PVOID)
"302 Redirect",(LPDWORD) szTemp,0);
wsprintf(rgchBuff, "%s : inside >%s< >%s<\n (%s)\n",t.Format
("%m/%d/%y %H:%M:%S"), serverString, urlString,szTemp);
WriteFile(m_hLogFile, rgchBuff, cb,&cbWritten, NULL);
return SF_STATUS_REQ_HANDLED_NOTIFICATION;
}
//we want to leave this alone and let IIS handle it
return SF_STATUS_REQ_NEXT_NOTIFICATION;
}

DWORD CRedirectorFilter::OnEndOfNetSession(CHttpFilterContext* pCtxt)
{
// TODO: React to this notification accordingly and
// return the appropriate status code
return SF_STATUS_REQ_NEXT_NOTIFICATION;
}

// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CRedirectorFilter, CHttpFilter)
//{{AFX_MSG_MAP(CRedirectorFilter)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif // 0

[David Wang]

Is there any reason why you cannot use the built in 302 Redirection
functionality in IIS?

Just set the redirection at the Website level for mail.oldserv.com to
mail.ourserv.com

//David
http://w3-4u.blogspot.com
http://blogs.msdn.com/David.Wang
//