httpModule in Web Application Project not being called

Question

User1254222884 posted

I'm working on moving our website project to a web application project and have run into a problem with httpModule.

I cannot get an httpModule to be run when running the compiled web application project in IIS. When I run it in IIS Express in Visual Studio (2019 16.9.2), it is called. But when I change to Local IIS, the httpModule init method is never called.

To duplicate:

1. Create a new Visual Studio project
2. ASP.NET Web Application (.NET Framework) template
3. Project Name: ModuleTest, place solution and project in the same directory
4. Create
5. Web Froms and Web API
6. Create
7. Add new folder: AppCode
8. Add new subfolder httpModule
9. Add new item in httpModule subfolder
10. select ASP.NET Module
11. Name: TestModule.cs
12. Add
13. Put a breakpoint on line 24 (context.LogRequest += new EventHandler(OnLogRequest);)
14. Add the following code to the web.config file just before the </system.webServer> closing tag:

```
     <modules>
        <add name="TestModule" type=" ModuleTest.AppCode.httpModule.TestModule"/>
     </modules>
```

• Run the debugger and note that the debugger stops in the httpModule at the breakpoint.
• Now, change the debug setting to use Local IIS (instead of IIS Express)
• Create Virtual Directory
• Verify that the virtual directory/application is using an integrated application pool
• Run the debugger and note that the debugger DOES NOT stop in the httpModule at the breakpoint.

How do I get the httpModule to execute in the Local IIS context?

Answer 1

User753101303 posted

Hi,

You meant <httpModules>? A breakpoint outside of the module? I would start by using some actual outcome (adding a http header or whatever) to make 100% if the module is not called or if it"s a debugging problem.

Edit: which IIS version do you use?

Answer 2

User1254222884 posted

No, I meant <modules>

I was looking at code in an aspx.cs code-behind file that was actually outputting data that showed that the httpModule was not being called.

The solution was in the way the httpModule is specified (different, slightly than in a website project).

In a website project, I can specify the httpModule with:

<add name="somename" type="namespace.class" />

But, in a web application project, you have to specify the FILENAME of the dll the httpModule is in like this:

<add name="somename" type="namespace.class, filename" />

This was the key to getting this to work in a web application project.

Oh, and I'm using Visual Studio 2019, latest build.