How to elegantly handle ReturnUrl when using UrlRewrite in ASP.NET 2.0 WebForms

Question

I have a folder with multiple .aspx pages that I want to restrict access to. I have added web.config to that folder with .

The

Answer 1

Create the following control adapter to rewrite the form tag with the for the action attribute. I used this a ASP.NET 2.0 app in conjunction with the Intelligencia url rewriter. I got it from this blog post from the Gu.

Put this class in your App_Code folder:

using System.IO;
using System.Web;
using System.Web.UI;

public class FormRewriterControlAdapter : System.Web.UI.Adapters.ControlAdapter
{
    protected override void Render(HtmlTextWriter writer)
    {
        base.Render(new RewriteFormHtmlTextWriter(writer));
    }
}

public class RewriteFormHtmlTextWriter : HtmlTextWriter
{
    public RewriteFormHtmlTextWriter(TextWriter writer) : base(writer)
    {
        base.InnerWriter = writer;
    }

    public RewriteFormHtmlTextWriter(HtmlTextWriter writer) : base(writer)
    {
        this.InnerWriter = writer.InnerWriter;
    }

    public override void WriteAttribute(string name, string value, bool fEncode)
    {

        // If the attribute we are writing is the "action" attribute, and we are not on a sub-control, 
        // then replace the value to write with the raw URL of the request - which ensures that we'll
        // preserve the PathInfo value on postback scenarios

        if ((name == "action"))
        {
            if (HttpContext.Current.Items["ActionAlreadyWritten"] == null)
            {

                // Because we are using the UrlRewriting.net HttpModule, we will use the 
                // Request.RawUrl property within ASP.NET to retrieve the origional URL
                // before it was re-written.  You'll want to change the line of code below
                // if you use a different URL rewriting implementation.
                value = HttpContext.Current.Request.RawUrl;

                // Indicate that we've already rewritten the 
's action attribute to prevent
                // us from rewriting a sub-control under the  control
                HttpContext.Current.Items["ActionAlreadyWritten"] = true;

            }
        }
        base.WriteAttribute(name, value, fEncode);
    }
}

Then, create this .browser file in your App_Browsers folder: