Q:

When a restricted page is accessed, Sitecore will automatically redirect to the login page and pass three parameters - User, Login and Item. The problem is that some restricted pages are accessed with a query string, which is lost when Sitecore redirects to login.html. How is it possible to get access to the original URL or query string?

For example:

/members.html?ID=123 is accessed, which is a restricted page
Sitecore automatically redirects to login.html
Login.html?item=/members.html&user=test&login=/login.html is the URL. The ID=123 is lost from the query string.

A:

Please see the workaround below.

You need to create a custom processor and pass the query string value to the ClientData variable (Sitecore.Context.ClientData). Then you will be able to read this value from the code-behind of your login page.

1. Create your custom class library with the following sample source code:

using System;
using Sitecore;
using Sitecore.Web;
using Sitecore.Pipelines.HttpRequest;

namespace Custom
{
   public class QueryStringSaver
   {
      public void Process(HttpRequestArgs args)
      {
         // requesting the query string
         string querystring = args.QueryString;
         // setting the client data value
         Sitecore.Context.ClientData.SetValue("qs", querystring);
      }
   }
}

2. Compile and place it into the bin folder of your Sitecore installation.

Add your custom processor into the <httpRequestBegin> section of the web.config file before the QueryStringResolver processor as shown below:

3. Add the following lines to your login layout code:

private void Page_Load(object sender, System.EventArgs e)
{
// getting the query string value
string clientDataQueryString = Sitecore.Context.ClientData.GetValue("qs") as string;

// output
Response.Write(clientDataQueryString);
}

Now the original query string can be preserved.

Note:

It is assumed that the URL of the login page is added into the IgnoreURLPrefixes list of the web.config file as shown below:

<setting name="IgnoreUrlPrefixes" value="/trace.axd|/sitecore/shell/Editor|/sitecore/admin/upgrade/

|UnhandledException.html|/layouts/login.html" />