SampleController.vb

Function FileStream(url As String) As ActionResult
    Try
        Dim req = HttpWebRequest.CreateHttp(url)
        Dim res = DirectCast(req.GetResponse, HttpWebResponse)

        Response.ContentType = res.ContentType
        res.GetResponseStream.CopyTo(Response.OutputStream)

    Catch ex As WebException
        If ex.Status = System.Net.WebExceptionStatus.ProtocolError Then
            Dim r = DirectCast(ex.Response, System.Net.HttpWebResponse)
            Response.StatusCode = r.StatusCode
        End If
    End Try

    Return New EmptyResult
End Function