FIX: ISAPI Extension Wizard Generates Bad OnAuthentication (152493)
The information in this article applies to:
- The AppWizard, when used with:
- Microsoft Visual C++, 32-bit Editions 4.1
This article was previously published under Q152493 SYMPTOMS
Generating an ISAPI Filter using the MFC ISAPI Extension Wizard and
selecting the option "Client Authentication Requests," will generate an
ISAPI Filter DLL with an OnAuthentication() member function that will never
be called.
CAUSE
When generating an ISAPI Filter using the MFC ISAPI Extension Wizard, if
the "Client Authentication Requests" checkbox is selected on the second
page of the Wizard, the function generated, OnAuthentication(), will have
an improper type as one of its parameters. Therefore, it will not override
the virtual function in the base class.
RESOLUTION
Modify the definition and implementation of the OnAuthentication function
so the second parameter is of type PHTTP_FILTER_AUTHENT rather than type
PHTTP_FILTER_PREPROC_HEADERS.
The definition of the OnAuthentication function will look like the
following in the .H file:
DWORD OnAuthentication(CHttpFilterContext* pCtxt,
PHTTP_FILTER_PREPROC_HEADERS pHeaderInfo);
and like the following in the .CPP file:
DWORD CMyFilter::OnAuthentication(CHttpFilterContext* pCtxt,
PHTTP_FILTER_PREPROC_HEADERS pHeaderInfo)
The second parameter should not be PHTTP_FILTER_PREPROC_HEADERS, but should
read PHTTP_FILTER_AUTHENT. For example:
DWORD OnAuthentication(CHttpFilterContext* pCtxt,
PHTTP_FILTER_AUTHENT pHeaderInfo);
in the .H file, and:
DWORD CMyFilter::OnAuthentication(CHttpFilterContext* pCtxt,
PHTTP_FILTER_AUTHENT pHeaderInfo)
in the .CPP file.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article. This bug was fixed in Visual C++ 32-bit
Edition version 4.2.
| Modification Type: | Major | Last Reviewed: | 10/24/2003 |
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| Keywords: | kbBug kbfix kbNoUpdate kbVC420fix KB152493 |
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