internal IAsyncResult BeginReadResponse(int timeout,
AsyncCallback cb,
object state)
{
SetProgress(true);
ReaderStateObject stateObj = null;
try
{
_response = new FtpResponse(_encoding);
stateObj = new ReaderStateObject(cb, state);
_response.NewLineEvent += new FtpResponse.NewLineEventHandler(this.OnNewLine);
_linesBuilder.NewLineEvent += new BytesRoad.Net.Ftp.Advanced.LinesBuilder.NewLineEventHandler(LinesBuilder_NewLineEvent);
_socket.ReceiveTimeout = timeout;
BuildResponse(stateObj);
}
catch
{
SetProgress(false);
_response.NewLineEvent -= new FtpResponse.NewLineEventHandler(this.OnNewLine);
_linesBuilder.NewLineEvent -= new BytesRoad.Net.Ftp.Advanced.LinesBuilder.NewLineEventHandler(LinesBuilder_NewLineEvent);
throw;
}
return(stateObj);
}
private void OnRecieved(IAsyncResult ar)
{
ReaderStateObject stateObj = (ReaderStateObject)ar.AsyncState;
try
{
stateObj.UpdateContext();
int readNum = _socket.EndReceive(ar);
if (0 == readNum)
{
throw GetClosedException();
}
_linesBuilder.PutData(_recvBuffer, readNum, false);
BuildResponse(stateObj);
}
catch (Exception e)
{
stateObj.Exception = e;
stateObj.SetCompleted();
}
catch
{
NSTrace.WriteLineError("Non-CLS exception at: " + Environment.StackTrace);
throw;
}
}
void BuildResponse(ReaderStateObject stateObj)
{
bool needMoreData = true;
stateObj.UpdateContext();
do
{
ParseExistentData();
if (_response.IsCompleted)
{
stateObj.SetCompleted();
needMoreData = false;
break;
}
} while(_linesBuilder.Available > 0);
if (needMoreData)
{
//start reading response
_socket.BeginReceive(_recvBuffer,
0,
_recvBuffer.Length,
new AsyncCallback(this.OnRecieved),
stateObj);
}
}