private async Task <SetupMsg> Setup(WebSocket ws)
{
var buf = new byte[256];
// Read setup msg
WebSocketReceiveResult result = await ws.ReceiveAsync(new ArraySegment <byte>(buf), CancellationToken.None);
SetupMsg setupMsg = JsonConvert.DeserializeObject <SetupMsg>(Encoding.UTF8.GetString(buf, 0, result.Count));
if (setupMsg.FileSize > UploadConfig.MaxFileSize)
{
await ws.CloseAsync(WebSocketCloseStatus.PolicyViolation, "File size too large",
CancellationToken.None);
throw new Exception("File size too large");
}
setupMsg.FileName = UploadUtil.SanitizeFileName(setupMsg.FileName);
setupMsg.Code = GetGuid();
_dbHelper.InsertFilesEntry(Files.CreateWithUtcNow(setupMsg.Code, setupMsg.FileName, setupMsg.FileSize));
await UploadUtil.SendResp(ws, Resp.Ok());
return(setupMsg);
}