« Previous Next »

• 07-20-2007, 12:23 AM

  surenb Joined on 12-14-2002, 10:18 AM Posts 5

  Adding HttpModule dll in IIS 6.0 Reply Contact Hi, I am a newbie at this. I have created a class library project in asp.net 2.0 which implements IHttpModule. I tried to add this dll in windows 2003 IIS 6.0 using wildcard application mapping (with the "verify that file exist" unchecked) by following the instructions given in the link below  http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/5c5ae5e0-f4f9-44b0-a743-f4c3a5ff68ec.mspx?mfr=true I received an Error 404, so I followed the instructions given by http://support.microsoft.com/kb/315122 and added the web service extensions. Now I am getting an "There is a problem with the page you are trying to reach and it cannot be displayed". That is it says Http 500 Internal Server Error. I need to add this dll in the server to protect a somepage.aspx. It's a third party developed aspx files where I cannot really add anything to their web.config file. So Instead of using ISAPI filters(Which require knowledge of C++), we decided to do it by HttpModule and then add the dll. Can anyone please tell me this can be done? If so how to avoid theHttp 500 Internal Server Error? I am really at my wit's end. Can someone please help me............ Suren

• 07-20-2007, 2:51 AM

  In reply to

  mvolo Joined on 09-17-2003, 1:48 PM Philadelphia, PA Posts 584

  Re: Adding HttpModule dll in IIS 6.0 Reply Contact Suren, You cannot map a managed DLL to be a wildcard extension in IIS - the wildcard extension DLL must be a native ISAPI extension.  What you need to do is map ASPNET_ISAPI.DLL (the one that is mapped to .aspx) as the wildcard extension. Then, all requests to the url and below that has the wildcard extension will be passed through ASP.NET, where your module will have a chance to do its work.  For an example of doing this, you can check our my blog post here, where I do it to run my LeechGuard ASP.NET modules for all IIS content: http://mvolo.com/blogs/serverside/archive/2006/11/10/Stopping-hot_2D00_linking-with-IIS-and-ASP.NET.aspx. Read the "Enabling LeechGuard to protect images on IIS6" part. Thanks, Mike Volodarsky Program Manager IIS Core Server Visit mvolo.com for more inside information on IIS7, IIS and ASP.NET This posting is provided "AS IS" with no warranties, and confers no rights.

• 07-20-2007, 8:06 AM

  In reply to

  tomkmvp Joined on 03-20-2003, 10:27 AM Central NJ Posts 6,187	Re: Adding HttpModule dll in IIS 6.0 Reply Contact Here's a generic reference on MSDN on how to create and configure an HttpModule ... http://msdn2.microsoft.com/en-us/library/tfd6k449.aspx Tom Kaminski IIS MVP http://mvp.support.microsoft.com/ http://blogs.iis.net/tomkmvp/ http://www.linkedin.com/pub/8/690/408 http://www.bluesrepublic.org/

• 07-20-2007, 9:06 AM

  In reply to

  surenb Joined on 12-14-2002, 10:18 AM Posts 5

  Re: Adding HttpModule dll in IIS 6.0 Reply Contact Hi Mike Volodarsky, Thanks a lot for explaining it very clearly and also for the link. Here is what I have to do, I have a page "page1.aspx", which has a link that takes me to "page2.aspx".This page2.aspx is a third party application where I cannot insert or add anything in the web.config file of this page. So we wrote a HttpModule dll to check the urlrefferer of the page2.aspx, if it exist it will be displayed or else it will be redirected page2.aspx Here is my HttpModule Namespace SecurityModules        Public Class CustomURLModule         Implements IHttpModule         Public Sub Dispose() Implements System.Web.IHttpModule.Dispose         End Sub         Public Sub Init(ByVal context As System.Web.HttpApplication) Implements System.Web.IHttpModule.Init             AddHandler context.BeginRequest, AddressOf onBeginRequest             AddHandler context.EndRequest, AddressOf onEndRequest         End Sub         Public Sub onBeginRequest(ByVal sender As Object, ByVal e As EventArgs)             Dim app As HttpApplication             app = CType(sender, HttpApplication)             If System.Web.HttpContext.Current.Request.Url.AbsolutePath = "http://localhost/Mypage/page2.aspx" Then                 If System.Web.HttpContext.Current.Request.UrlReferrer Is Nothing Then                     System.Web.HttpContext.Current.Response.Redirect("http://localhost/TestPage/page1.aspx")                 End If            End Sub. So I tried doing according to the instructions in blog, Just by adding the dll in the "bin" folder of the application and mapping the ASPNET_ISAPI.DLL as wildcard application.It is not working. Am I missing something? Suren

• 07-20-2007, 10:46 PM

  In reply to

  mvolo Joined on 09-17-2003, 1:48 PM Philadelphia, PA Posts 584

  Re: Adding HttpModule dll in IIS 6.0 Reply Contact Suren, Those instructions are for configuring ASP.NET to be the wildcard extension, so that ASP.NET processes all requests to your application.  From your module code, I see that you dont actually need this.  Since you module only needs to intercept requests to page2.aspx, an ASP.NET page, you can simply add your module and it will work. Now, for the add the module part (which is required to load an IHttpModule to your ASP.NET application whether or not you are setting up the wildcard extension), you need to add your module to the web.config for your application as follows: <configuration> <system.web>   <httpModules>       <add name="YourModule" type="SecurityModules.CustomURLModule" />   </httpModules> </system.web> </configuration> If your web.config already exists, place that config between the existing <configuration> tags. Thanks, Mike Volodarsky Program Manager IIS Core Server Visit mvolo.com for more inside information on IIS7, IIS and ASP.NET This posting is provided "AS IS" with no warranties, and confers no rights.

• 07-21-2007, 10:02 PM

  In reply to

  surenb Joined on 12-14-2002, 10:18 AM Posts 5	Re: Adding HttpModule dll in IIS 6.0 Reply Contact Thanks a lot Mike. That really helped a lot. Now may be I will look more into ISAPI filter because I cannot really add that part in web.config of page2.aspx Suren

• 07-21-2007, 10:29 PM

  In reply to

  mvolo Joined on 09-17-2003, 1:48 PM Philadelphia, PA Posts 584

  Re: Adding HttpModule dll in IIS 6.0 Reply Contact Suren, You can also add the modules globally on the server without touching the web.config for your application. You can use a <location> tag to apply the <httpModules> configuration to your application, but set it in root web.config (in the framework directory). An ISAPI filter is much, much more painful of a solutuon to this problem than should be necessary. Thanks, Mike Volodarsky Program Manager IIS Core Server Visit mvolo.com for more inside information on IIS7, IIS and ASP.NET This posting is provided "AS IS" with no warranties, and confers no rights.

• 07-23-2007, 9:10 AM

  In reply to

  surenb Joined on 12-14-2002, 10:18 AM Posts 5	Re: Adding HttpModule dll in IIS 6.0 Reply Contact Hi Mike, Thanks. Let me work on it and if I have any doubt, I will come back. If it solves my problem, I will put it on the post too. Really thanks for your advice. Suren

• 08-13-2008, 4:42 PM

  In reply to

  jabailo Joined on 11-12-2007, 3:17 PM Posts 18	Re: Adding HttpModule dll in IIS 6.0 Reply Contact I am trying to add a URL Write HttpModule.   I use the Wildcard Application Mapping to point back to aspnet_isapi.dll (.net 2.0).  It works fine as a virtual directory -- but not at the root, web site, level.  Can you suggest why?   John Bailo