private static string GetNextRequestId()
{
ulong ret = 37059; //starting number "aaaa"
//lock to reduce the chance of file contention
lock (_hnd) {
if (_RequestIdPath == null)
{
if (HttpContext.Current != null)
{
_RequestIdPath = HttpContext.Current.Server.MapPath("~/App_Data/request_id_counter.bin");
}
else
{
_RequestIdPath = "./request_id_counter.bin";
}
}
var b = new byte[0];
if (File.Exists(_RequestIdPath))
{
b = File.ReadAllBytes(_RequestIdPath);
}
if (b.Length >= 8)
{
ret = BitConverter.ToUInt64(b, 0);
ret++;
}
File.WriteAllBytes(_RequestIdPath, BitConverter.GetBytes(ret));
return(ret.AsBase33Safe());
}
}