支持使用 HttpModule 加解密都用一个就可以了
Private Sub Init(ByVal context As System.Web.HttpApplication) Implements IHttpModule.Init
' Set the handler for the PreRequestHandlerExecute event
AddHandler context.PreRequestHandlerExecute, AddressOf OnPreRequestHandlerExecute
' Set the handler for the PostRequestHandlerExecute event
AddHandler context.PostRequestHandlerExecute, AddressOf OnPostRequestHandlerExecute
End Sub