internal void Execute(int timeout,
string cmd,
FtpDataType dataType,
long restart,
DTPStream userStream)
{
bool ccLocked = false;
//protected component against simultaneuous usage
SetProgress(true);
try
{
//----------------------------------------
//Lock Control connection to prevent
//run the command like abort, quit, stat
//during configuring of data connection
ccLocked = _cc.Lock(Timeout.Infinite);
FtpResponse response = null;
//----------------------------------------
//send transfser type command
if ((false == _client.IsDataTypeWasCached) ||
((true == _client.IsDataTypeWasCached) && (_client.CachedDataType != dataType)))
{
string typeCmd = GetTypeCommand(dataType);
response = _cc.SendCommandEx(timeout, typeCmd);
FtpClient.CheckCompletionResponse(response);
_client.IsDataTypeWasCached = true;
_client.CachedDataType = dataType;
}
//----------------------------------------
//Initialize data connection
_currentDC = null;
Cmd_GetDataConnection getDC = new Cmd_GetDataConnection(_client);
lock (this)
{
if (!_disposed)
{
_currentDC = getDC.Execute(timeout);
}
}
CheckDisposed();
//----------------------------------------
//send restart position, if needed
if (0 < restart)
{
string restCmd = "REST " + restart.ToString();
response = _cc.SendCommandEx(timeout, restCmd);
if (false == response.IsIntermediateReply)
{
throw GetRestartNotSuppException(response);
}
CheckDisposed();
}
//----------------------------------------
//establish connection now, if it is outbound
if (FtpDataConnectionType.Outbound == _currentDC.Type)
{
_currentDC.Establish(timeout);
CheckDisposed();
}
//----------------------------------------
//send transfer request to the server
response = _cc.SendCommandEx(timeout, cmd);
CheckDisposed();
//----------------------------------------
//first respone should be one
//of the 1** - let's check it
if (response.IsCompletionReply) //should not happen
{
NSTrace.WriteLineError("Executing DTP: receive completion as first reply.");
//_currentDC.AbortAsyncEstablish();
}
else
{
FtpClient.CheckPreliminaryResponse(response);
//----------------------------------------
//establish connection now, if it is inbound
if (FtpDataConnectionType.Inbound == _currentDC.Type)
{
_currentDC.Establish(timeout);
CheckDisposed();
}
FtpAbortedException abortEx = null;
try
{
//----------------------------------------
//subscribe to data events
_currentDC.DataTransfered += new FtpDataConnection.DataTransferedEventHandler(OnDataTransfered);
_currentDC.Completed += new FtpDataConnection.CompletedEventHandler(OnCompleted);
//----------------------------------------
//prepare for abortion
_aborted = false;
_client.CurrentDTP = this;
//----------------------------------------
//Unlock control connection, now the command
//like abort, stat, quit could be issued
ccLocked = false;
_cc.Unlock();
//----------------------------------------
//start DTP
_currentDC.RunDTPStream(timeout, userStream);
}
catch (FtpAbortedException ex)
{
abortEx = ex;
}
finally
{
_currentDC.DataTransfered -= new FtpDataConnection.DataTransferedEventHandler(OnDataTransfered);
_currentDC.Completed -= new FtpDataConnection.CompletedEventHandler(OnCompleted);
}
//----------------------------------------
//Lock control connection again - reading
//responses
ccLocked = _cc.Lock(Timeout.Infinite);
//----------------------------------------
//Skip preliminary responses
//
for (int i = 0; i < 10; i++)
{
response = _cc.ReadResponse(timeout);
CheckDisposed();
if (response.IsPreliminaryReply)
{
continue;
}
break;
}
//----------------------------------------
//If still receiving priliminary responses
//then it looks suspecious?
//
if (response.IsPreliminaryReply)
{
throw GetTooManyRespException();
}
//----------------------------------------
// Dealing with Abort or Reset
//
if (!_aborted && (null == abortEx))
{
if (!_currentDC.ManuallyClosed)
{
FtpClient.CheckCompletionResponse(response);
}
else
{
//----------------------------------------
//we DID close the data connection,
//so, in general, the response should be
//errorneous - therefore skip checking of it
}
}
else
{
if (null != abortEx) //&& !response.IsCompletionReply)
{
abortEx.SetResponse(response);
}
//----------------------------------------
//If "ABOR" command was sent we need to
//one more response...
//
if (_aborted)
{
response = _cc.ReadResponse(timeout);
}
}
//------------------------------------------
//If "QUIT" was sent during data transfer
//then here we need read one more response
if (_quited)
{
response = _cc.ReadResponse(timeout);
}
if (null != abortEx)
{
throw abortEx;
}
}
}
catch (Exception e)
{
CheckDisposed();
NSTrace.WriteLineError(_errMsg + e.ToString());
throw;
}
catch
{
CheckDisposed();
NSTrace.WriteLineError(_errMsgNonCls + Environment.StackTrace.ToString());
throw;
}
finally
{
SetProgress(false);
_client.CurrentDTP = null;
if (true == ccLocked)
{
_cc.Unlock();
}
}
}