Web Development

[In Web.Config]
<httpHandlers>
    <add verb="*" path="*.CustomExtension" type="MyHandler.ExtensionHandler, MyHandler" />
</httpHandlers>

[In ExtensionHandler.cs]
using System;
using System.Web;

namespace MyHandler 
{
   public class ExtensionHandle  : IHttpHandler
   {
      public void ProcessRequest(HttpContext context) {
         HttpResponse Response = context.Response;
         HttpRequest Request = context.Request;
         //Do your work here - requested file == Request.FilePath
      }
 
      public bool IsReusable {
         get {
            return true;
         }
      } 
   }
}

1. Create a new web project, and add ExtensionHandler.cs to it
2. Create or update the web.config file in the root of your project with the HTTPHandler details


3. Open IIS Admin


4. Find your project, and add the mapping for your extension.
   
   
   
   1. This should be mapped to the aspnet_isapi.dll - just copy the path from the aspx extension.
   2. You can limit the verbs to GET, HEAD, POST and DEBUG.
   3. Tick the "Script Engine" option, and [optionally] un-tick "Check that file exists".
5. If you have URLScan installed, you may need to modify the configuration to allow the extension through. The URLScan.ini file contains details of how to do this.
6. Compile your project.
7. Run!