B4J Question www in URL with secure site

Public Sub Filter(req As ServletRequest, resp As ServletResponse) As Boolean
    If req.Secure Then
        If req.FullRequestURI.StartsWith("www.") Or req.FullRequestURI.StartsWith("https://www.") Then
            Dim url As String = req.FullRequestURI
            resp.SendRedirect(url.Replace("https://www.", "https://"))
            Return False
        End If
       
     Return True
   Else
        If req.FullRequestURI.StartsWith("www.") Or req.FullRequestURI.StartsWith("http://www.") Then
            Dim url As String = req.FullRequestURI
            url = url.Replace("http://www.","http://")
            url = url.Replace("www.","")
            resp.SendRedirect(url.Replace("http:", "https:") _
               .Replace(Main.srvr_public.Port, Main.srvr_public.SslPort))
            Return False
        End If
       
       
     resp.SendRedirect(req.FullRequestURI.Replace("http:", "https:") _
       .Replace(Main.srvr_public.Port, Main.srvr_public.SslPort))
     Return False
   End If
End Sub