Response.Redirect with a fragment identifier causes unexpected refresh when later using location.hash

Question

I was hoping someone can assist in describing a workaround solution to the following issue I am running into on my ASP.NET website on IE. In the following I will describe th

Answer 1

This will happen in IE if there's a directive that forbids caching on the post-redirection page. If you remove the No-Cache header, you will find that the problem no longer repros.

Here's a Meddler script that demonstrates the behavior:

import Meddler;
import System;
import System.Net.Sockets;
import System.Windows.Forms;

class Handlers
{
    static function OnConnection(oSession: Session)
    {
        if (oSession.ReadRequest())
        {       
            var oHeaders: ResponseHeaders = new ResponseHeaders();
            oHeaders["Connection"] = "close";

            if (oSession.urlContains("postRedir.asp"))
            {
                oHeaders.Status = "200 OK";
                oHeaders["Content-Type"] = "text/html"; 
                oHeaders["Cache-Control"] = "no-cache";
                oSession.WriteString(oHeaders);
                oSession.WriteString("");
                oSession.WriteString("Top of page





");
                oSession.WriteString("



Div with ID firstAnchor
Click this link: #secondAnchor");
                oSession.WriteString("

















");
                oSession.WriteString("








Div with ID secondAnchor");

            }
            else
                if (oSession.urlContains("doRedir.asp"))
                {
                    oHeaders.Status = "301 Redir";
                    oHeaders["Location"] = "/postRedir.asp#firstAnchor";                        
                    oSession.WriteString(oHeaders.ToString());          
                }
            else
            {
                oHeaders.Status = "200 OK";
                oHeaders["Content-Type"] = "text/html"; 
                oSession.WriteString(oHeaders);
                oSession.WriteString("This is a test case for http://stackoverflow.com/questions/1985056/response-redirect-with-a-fragment-identifier-causes-unexpected-refresh-when-later
");
                oSession.WriteString("Click this link: Do Redirect");
                oSession.WriteString("
");
            }
        }

        oSession.CloseSocket();
    }
}