ASP.NET

HttpModule doesn’t seem to work

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Welcome to Programming Tutorial official website. Today - we are going to cover how to solve / find the solution of this error HttpModule doesn’t seem to work on this date .

I’ve created a simple HttpModule to log the uses of my existing webservice. There’s a dll containing a single class 

public class TrackingModule : System.Web.IHttpModule
{
    public TrackingModule(){}

    public void Init(System.Web.HttpApplication context)
    {
        context.BeginRequest+=new EventHandler(context_BeginRequest);
    }

    public void Dispose()
    {

    }

    private void context_BeginRequest(object sender, EventArgs e)
    {
        try
        {
            Microsoft.ApplicationBlocks.ExceptionManagement.ExceptionManager.Publish( new Exception("Log attept") );
            HttpApplication app = (HttpApplication)sender;
            string method = app.Request.RawUrl;
            SaveUseToDatabase( app.Request.UserHostAddress, method );
        }
        catch( Exception ex )
        {
            try
            {
                Microsoft.ApplicationBlocks.ExceptionManagement.ExceptionManager.Publish( ex );
            }
            catch{}
        }
    }
}

After compiling the dll I add it to webservice’s bin folder and in webservice’s web.config I add:

<system.web>
    <httpModules>
       <add name="TrackingModule" type="WebserviceTrackingModule.TrackingModule, WebserviceTrackingModule"/>

This works fine on my computer, but when I copy it to production server, nothing happens. No new entries in database, no entries logged by ExceptionManager. As if it’s not there at all.

What can I be missing?

Edit: After performing another test I can add that it works when I add it for a webservice that has it’s own top-level virtual directory. It doesn’t work for webservices that reside in virtual directories that are subfolders of another virtual directory.

I know that HttpModules settings are being inherited by subdirectories, but it looks like the existence of parent directory gets in the way.

Answer

I believe I have found a better solution. Attach the module at runtime instead of in the web config. Check out Rick Strahl’s blog post for the details.