This sample demonstrates how to access IIS server variables from an ISAPI extension. Server variables provide such information as header values, the application's physical path, authentication information, client information, and so on.
Warning Header values should never be used to make important decisions in your code because header values can be fabricated by a malicious user.
Important These samples are provided for educational purposes only. They are not intended to be used in a production environment, have not been tested in a production environment, and Microsoft does not provide technical support for them.
Sample Overview
Requirements
Location of the Source Code
Build and Install the Sample
Run the Sample
Sample Output
Helpdesk
DumpVars.dll uses the ISAPI extension GetServerVariable callback function to display a list of a few select IIS server variables (supported on IIS versions 4.0 through 6.0). A complete list of server variables can be found in the IIS Software Developer Kit (SDK) under Server Variables.
to top
This sample requires the installation of the following software to function properly:
IIS samples are included in the IIS Software Developer Kit (SDK). You can download the IIS SDK from Platform SDK Update. You can view the SDK at MSDN Online. In the table of contents at MSDN Online, click Web Development, Server Technologies, Internet Information Services (IIS), SDK Documentation, Internet Information Services, Samples.
The following source code files are required for this sample:
File | Description |
---|---|
DumpVars.sln | DumpVars Visual Studio .NET solution file, required to build this sample in Visual Studio .NET. |
DumpVars.vcproj | DumpVars Visual Studio .NET C Project file, required to build this sample in Visual Studio .NET. |
DumpVars.dsp, DumpVars.dsw | DumpVars Visual Studio 6.0 project files, required to build this sample in Visual Studio Version 6. |
DumpVars.cpp | DumpVars source module containing the code that implements the sample. |
DumpVars.def | DumpVars.dll definition containing code for creating the sample. |
MAKEFILE | DumpVars makefile for command line compilation |
To build this sample using the Visual C++ IDE, the following steps must be performed:
To build and run this sample without using the Visual C++ IDE, the following steps must be performed:
C:\MySamples
, type the following at the command line:
cd /d c:\MySamples NMAKE All
To install this sample, the following steps must be performed:
C:\Samples
and copy the DumpVars.dll to that folder.inetmgr
in the text box and click OK. Right-click on the Web site where you want to create a virtual directory, click New, and click Virtual Directory. In the Alias text box, type the name you want for your virtual directory, for example, DumpVars
. In the Directory text box, type the path to the folder that contains your files.
In order to run this sample, follow the instructions listed below:
DumpVars
, type
http://localhost/DumpVars/DumpVars.dll
in the Address bar
of IE.
After performing step 1 from Run the Sample, you should see a list of server variables starting with the following output.
Server Variable Dump -------------------------------------------------------------------------------- APPL_MD_PATH: /LM/W3SVC/1/ROOT APPL_PHYSICAL_PATH: d:\inetpub\wwwroot\ AUTH_PASSWORD: AUTH_TYPE:to top
If here you do not find answers to your questions, visit the Microsoft Help and Support Web site.
Problem | Possible Solution |
---|---|
When building the dll, C++ returns a permissions error. | Once you have called the dll from your web page, your system considers it a loaded dll. You must unload it to build it again, either by unloading the ASP application or deleting the dll from system32\dllcache. |
When browsing to the dll, IE gives you a permissions error. | The folder and virtual directory must have Execute permissions set on them. |
© 1997-2002 Microsoft Corporation. All rights reserved.