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POHow to create file on server with special privileges on Asp .net using visual basic?
 

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  1. POHow to create file on server with special privileges on Asp .net using visual basic?
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    <p>One of the client requirements is that the server generate files and store them on a special folder. This files created can not be modified by users or deleted. So the only way I thought is to generate this files with elevated privileges so a normal user can't delete or modify them. But the question is how can I generate a file with this privileges that normal users can interact with this files... only download from server.</p> <p>I use this code to generate the file... But I don't know how to configure it for elevated privileges.</p> <p>This is the button which generate the file and allow to download it:</p> <pre><code>Protected Sub ibtGenerar_OnClick(ByVal sender As Object, ByVal e As ImageClickEventArgs) oArchivoTelecredito.NombreArchivo = txtNombreArchivo.Text oArchivoTelecredito.SesionDetalleArchivosTelecredito = New List(Of DetalleArchivoTelecreditoBE) Dim oArchivoTelecreditoSL As New ArchivoTelecreditoSL Response.AddHeader("Content-disposition", "attachment;filename=" &amp; oArchivoTelecredito.NombreArchivo &amp; ".txt") Response.ContentType = "application/octet-stream" Response.BinaryWrite(oArchivoTelecreditoSL.GeneraArchivoTelecredito(oArchivoTelecredito, Server.MapPath(oArchivoTelecredito.NombreArchivo))) Response.End() End Sub </code></pre> <p>This is the function which create the file on server:</p> <pre><code>Public Function GeneraArchivoTelecredito(ByVal telecredito As ArchivoTelecreditoBE, ByVal ruta As String) As Byte() Dim lineas As Integer = telecredito.SesionDetalleArchivosTelecredito.Count + 1 Dim registro(0 To lineas) As String registro(0) = Me.ObtenerCabeceraArchivoTelecredito(telecredito) Dim archivo = ruta &amp; ".txt" Using escritor As New StreamWriter(archivo) For index = 0 To lineas escritor.WriteLine(registro(index)) Next escritor.Close() End Using Dim lector As FileStream lector = File.Open(archivo, FileMode.Open) Dim bytes(lector.Length) As Byte lector.Read(bytes, 0, lector.Length) lector.Close() Return bytes End Function </code></pre>
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    1. COIf you want to set the file to be read-only then you can use File.SetAttributes("PathToFile", FileAttributes.ReadOnly).
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      1. POHow to create file on server with special privileges on Asp .net using visual basic?
      1. USjmaglio
    2. COI can be. But if I want to disallow deleting the file. Is it possible?
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      1. POHow to create file on server with special privileges on Asp .net using visual basic?
      1. USjcvegan
    3. COSee this post - http://serverfault.com/questions/3878/is-there-a-way-to-prevent-a-file-from-being-deleted - you should probably set the permissions on the directory not the files themselves.
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