Handle authentication tokens with .NET

Summary

Authentication tokens can be stored and re-used until they expire, as specified by their timeout value. This article details one way to handle tokens in a .NET environment.

Procedure

1. Within the solution's Global.asax.vb, include the following code:
   
   

   Code:
       Public Sub refreshToken(ByVal k As String, ByVal v As Object, ByVal r As System.Web.Caching.CacheItemRemovedReason)
           Dim onRemove As System.Web.Caching.CacheItemRemovedCallback = New System.Web.Caching.CacheItemRemovedCallback(AddressOf Me.refreshToken)
           Dim authWS As New Auth.Authentication
           Dim token As String = authWS.getToken("username", "password")
           HttpRuntime.Cache.Insert("AUTHENTICATION_TOKEN", token, Nothing, DateTime.Now.AddMinutes(59), System.Web.Caching.Cache.NoSlidingExpiration, Caching.CacheItemPriority.High, onRemove)
       End Sub
   
       Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
           refreshToken(Nothing, Nothing, Nothing)
       End Sub

   
   
2. Call this variable when a token is needed as an input to a method by using the following code:
   
   

   Code:
   Cache.Get("AUTHENTICATION_TOKEN")