Sitecore check user session and validate user if login onto different tabs or windows on same browser

We will implement httpRequestBegin pipeline to validate session and do request specific authentication logic.

Below code we are doing following activities:

1. Validate user session — We are using CheckSession(bool isHomePage) method for this purpose. It’ll check, is user authenticated? If authentication fail then redirect to configure page ex- login or timeout page.
2. If already login then can’t login with different login in same browser tabs or windows. Like how it happens in any standard site ex- gmail etc. Here we are using RedirectToLandingPage(bool isHomePage) method.

If user’s authentication is pass and user trying to open site URL in browser(chrome) different windows/tabs then user will be redirected to welcome/landing page.

namespace Sitecore.Foundation.Forms.Pipelines
{
 public class ValidateUserSession: HttpRequestProcessor
 {
 public override void Process(HttpRequestArgs args)
 {
 var request = HttpContext.Current.Request;
//If Sitecore CMS URL then skip check
 if (SitecoreContext.IsCMSRequest())
 {
 return;
 }
 //Here Home Page is login page.
 var homePage = Context.Database.GetItem(Context.Site.StartPath);
 var isHomePage = homePage.ID.Equals(Context.Item.ID); 
 if (Context.Item != null)
 { 
 if (CheckSession(isHomePage))
 {
 RedirectToLandingPage(isHomePage);
 }
 }
}
#region Private Methods
 /// <summary>
 /// Check user session, if not valid redirect to configure page.
 /// </summary>
 private bool CheckSession(bool isHomePage)
 {
 bool returnValue = true; 
 if (!isHomePage && !Context.User.IsAuthenticated)
 {
 string redirectUrl = FormsAuthentication.GetRedirectUrl(Context.User.Profile.UserName, true);
 WebUtil.Redirect(redirectUrl);
 returnValue=false;
 }
 return returnValue;
 }
/// <summary>
 /// If logged-in user trying to open url in browser different window/tab, user will redirect to landing/welcome page
 /// </summary>
 private void RedirectToLandingPage(bool isHomePage)
 { 
 if(isHomePage)
 {
 var rootItem = Context.Database.GetItem(Context.Site.RootPath); 
 InternalLinkField link = rootItem[Constant.LandingPage];
 string redirectUrl = Common.GenerateRedirecturl(redirectUrl, link);
 HttpContext.Current.Response.Redirect(redirectUrl, false); 
 } 
 }
 
 #endregion Private Methods
 }
}

Add config patch file.

<sitecore>
<pipelines>
<httpRequestBegin>
<processor type=”Sitecore.Foundation.Forms.Pipelines.ValidateUserSession, Sitecore.Foundation.Forms” patch:after=”*[@type=’Sitecore.Pipelines.HttpRequest.ItemResolver, Sitecore.Kernel’]”/>
</httpRequestBegin>
</pipelines>
<settings>