private void CancleCommand()
{
_cmdList.Clear();
_currentCommand = null;
}
/// <summary>
/// 执行下一条命令
/// </summary>
public void ExcuteNextCommand()
{
if (_cmdList.Count > 0)
{
FtpCommand cmd = _cmdList[0];
_cmdList.RemoveAt(0);
ExcuteCommand(cmd);
}
else
{
_currentCommand = null;
}
}
/// <summary>
/// 执行指定命令
/// </summary>
/// <param name="command"></param>
public void ExcuteCommand(FtpCommand command)
{
_currentCommand = command;
if (_cmdList.Count > 0)
{
_nextCommand = _cmdList[0];
}
else
{
_nextCommand = null;
}
CommandNotify(command.GetCommandLine());
_asyncSocket.Send(command.GetCommandLine());
}
/// <summary>
/// 准备命令，适宜的添加到执行列表
/// </summary>
/// <param name="command"></param>
public void PrepareCommand(FtpCommand command)
{
if (_currentCommand != null || _isConnect == false)
{
if (command.Command == "RETR" || command.Command == "STOR" || command.Command == "LIST")
{
AddCommandList(new FtpCommand("PASV", 227));// add pasv
//有偏移说明是断点下载
if(command .Offset != 0)
{
AddCommandList(new FtpCommand("REST",350,command.Offset .ToString ()));
}
}
AddCommandList(command);
}
else
{
if (command.Command == "RETR" || command.Command == "STOR" || command.Command == "LIST")
{
//有偏移说明是断点下载
if (command.Offset != 0)
{
AddCommandList(new FtpCommand("REST", 350, command.Offset.ToString()));
}
AddCommandList(command);
ExcuteCommand(new FtpCommand("PASV", 227));//add pasv and send the pasv request
}
else
{
ExcuteCommand(command);
}
}
}
/// <summary>
/// 添加命令到执行列表
/// </summary>
/// <param name="command"></param>
private void AddCommandList(FtpCommand command)
{
if (_nextCommand == null)
{
_nextCommand = command;
}
_cmdList.Add(command);
}
public void PrepareCommand(FtpCommand command)
{
if (_currentCommand != null || _isConnect == false)
{
if (command.Command == "RETR" || command.Command == "STOR" || command.Command == "LIST")
{
AddCommandList(new FtpCommand("PASV", 227));// add pasv
}
AddCommandList(command);
}
else
{
if (command.Command == "RETR" || command.Command == "STOR" || command.Command == "LIST")
{
AddCommandList(command);
ExcuteCommand(new FtpCommand("PASV", 227));//add pasv and send the pasv request
}
else
{
ExcuteCommand(command);
}
}
}