isapi过滤器，如何实现url重定向？

[creakmud]

如题，

[masterz]

The following code demonstrates how to use an OnUrlMap notification in the filter to redirect a request to a different URL. If the URL contains a DoRedirect string (for example, http://server/doRedirect), the request will be redirected to http://www.microsoft.com.
DWORD CFiltRedirFilter::OnUrlMap(CHttpFilterContext* pCtxt,
PHTTP_FILTER_URL_MAP pMapInfo)
{
CHAR szRedirect [256];

if (strstr (pMapInfo->pszURL, "DoRedirect"))
{
CHAR szRedirect [256];
// replace www.microsoft.com with desired server
sprintf(szRedirect, "Location: http://%s\r\n\r\n", "www.microsoft.com");
pCtxt->ServerSupportFunction ( SF_REQ_SEND_RESPONSE_HEADER,
(LPVOID) "302 Redirect",
(DWORD *) szRedirect,
0 );
// Print a message to the debug window
ISAPITRACE1 ("Redirecting to: %s\n", szRedirect);
// we are done with this request
return SF_STATUS_REQ_FINISHED_KEEP_CONN;
}
// URL did not contain a DoRedirect string.
return SF_STATUS_REQ_NEXT_NOTIFICATION;
}

[masterz]

above is for ISAPI filter. the following is for ISAPI Extension

pCtxt->Reset();
CString strURL("http://www.csdn.net");
DWORD dwLen = strURL.GetLength();
pCtxt->ServerSupportFunction(HSE_REQ_SEND_URL_REDIRECT_RESP,
strURL.GetBuffer(0), &dwLen, NULL);
strURL.ReleaseBuffer();

[zhi_liu6]

说穿了就是
Location: http://xxx/xxx
呵呵

[creakmud]

to masterz()
试了，好象不行，根本没有执行到 OnUrlMap函数，是怎么回事呢？

[masterz]

你的filter 设置了SF_NOTIFY_URL_MAP flag 么

[creakmud]

to masterz()
怎么设置？

如果我想实现如下功能 当客户浏览http://test/a.doc时（a.doc不存在）由程序从数据库读取数据返回给客户，我该如何做？

[masterz]

你搜索以下SF_NOTIFY_URL_MAP ，给的关键字已经很具体了，自己去搜索怎么设吧

[celerityok]

mark!