Always enable TenantMiddleware to support scenarios such as using database caching in Redis or storing sessions in Redis

Author: claudiamurialdo

dotnet/src/dotnetcore/GxNetCoreStartup/SessionHelper.cs

@@ -60,9 +60,15 @@ public TenantMiddleware(RequestDelegate next)
 
 		public async Task Invoke(HttpContext context)
 		{
-			string host = context.Request.Host.Host;
-			string subdomain = host.Split('.').FirstOrDefault();
-			context.Items[AppContext.TENANT_ID] = subdomain; 
+			string host = context?.Request?.Host.Host ?? string.Empty;
+			string subdomain;
+
+			if (!string.IsNullOrEmpty(host) && host.Contains('.'))
+			{
+				subdomain = host.Split('.').FirstOrDefault();
+				if (!string.IsNullOrEmpty(subdomain))
+					context.Items[AppContext.TENANT_ID] = subdomain;
+			}
 
 			await _next(context);
 		}

dotnet/src/dotnetcore/GxNetCoreStartup/Startup.cs

@@ -505,11 +505,7 @@ public void Configure(IApplicationBuilder app, Microsoft.AspNetCore.Hosting.IHos
 			app.UseStaticFiles();
 
 			ISessionService sessionService = GXSessionServiceFactory.GetProvider();
-			GxRedisSession gxRedisSession = sessionService as GxRedisSession;
-			if (gxRedisSession != null && gxRedisSession.IsMultitenant)
-			{
-				app.UseMiddleware<TenantMiddleware>();
-			}
+			app.UseMiddleware<TenantMiddleware>();
 
 			ConfigureCors(app);
 			ConfigureSwaggerUI(app, baseVirtualPath);