public FTPClient(IPAddress serverIP, int localControlPort, string user, string password, Action <string> ConsoleLogDelegate)
{
controlClient = new TcpClient();
dataClient = new TcpClient();
ConsoleLogEvent += ConsoleLogDelegate;
controlPort = localControlPort;
dataPort = controlPort + 1;
try
{
controlClient.Connect(serverIP, MyFTPHelper.ftpControlPort);
controlStream = controlClient.GetStream();
FTPCommand userCommand = new FTPCommand("USER", new string[] { user });
if (!SendMessageToServerAndWaitReply(userCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
FTPCommand passwordCommand = new FTPCommand("PASS", new string[] { password });
if (!SendMessageToServerAndWaitReply(passwordCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
}
catch (Exception exc)
{
throw exc;
}
}
public async Task <FTPResponse> SendCommandAsync(FTPCommand command, CancellationToken token = default(CancellationToken))
{
return(await SendCommandAsync(new FTPCommandEnvelope
{
FtpCommand = command
}, token));
}
public void SendCommand(FTPCommand command, params object[] args)
{
string cmd = InterpretCommand(command, args);
print(">> " + cmd);
controlConnectionSocket.Send(ToASCII(cmd));
}
public static FTPCommand?ReadNextCommand(NetworkStream stream)
{
if (CachedCommands.Count > 0)
{
return(CachedCommands.Dequeue());
}
string streamstring = null;
try
{
streamstring = MyFTPHelper.ReadFromNetStream(stream);
}
catch (Exception exc)
{
throw exc;
}
string[] messages = streamstring.Split(new string[] { MyFTPHelper.FTPNewLine }, StringSplitOptions.RemoveEmptyEntries);
Array.ForEach(messages, (m) => CachedCommands.Enqueue(FTPCommand.String2Command(m)));
if (CachedCommands.Count > 0)
{
return(CachedCommands.Dequeue());
}
else
{
return(null);
}
}
public void SendCommand(FTPCommand command, bool shouldPrint, params object[] args)
{
string cmd = InterpretCommand(command, args);
if (shouldPrint)
{
print(">> " + cmd);
}
controlConnectionSocket.Send(ToASCII(cmd));
}
public static string Command2String(FTPCommand command)
{
String s = command.controlCommand;
if (command.parameters != null)
{
Array.ForEach(command.parameters, (p) => s += " " + p);
}
return(s);
}
public static string InterpretCommand(FTPCommand cmd, params object[] args)
{
switch (cmd)
{
case FTPCommand.ChangeToParent: return("CDUP");
case FTPCommand.StructureMount: return("SMNT");
case FTPCommand.StoreUnique: return("STOU");
case FTPCommand.RemoveDirectory: return("RMD");
case FTPCommand.MakeDirectory: return("MKD");
case FTPCommand.PrintDirectory: return("PWD");
case FTPCommand.ChangeDirectory: return(string.Format("CWD {0}", args));
case FTPCommand.System: return("SYST");
case FTPCommand.User: return(string.Format("USER {0}", args));
case FTPCommand.ListFiles: return("NLST");
case FTPCommand.SetPortActive: return(string.Format("PORT {0}", args));
case FTPCommand.SetPortPassive: return(string.Format("PASV {0}", args));
case FTPCommand.RetrieveFile: return(string.Format("RETR {0}", args));
case FTPCommand.SetTransferMode: return(string.Format("MODE {0}", args));
case FTPCommand.SetTransferType: return(string.Format("TYPE {0}", args));
case FTPCommand.AppendFile: return(string.Format("APPE {0}", args));
case FTPCommand.Put: return(string.Format("STOR {0}", args));
case FTPCommand.Disconnect: return("QUIT");
default:
throw new Exception("Can not interpret this command");
}
}
public static FTPCommand String2Command(string s)
{
string[] tokens = s.Split(' ');
FTPCommand cmd = new FTPCommand();
List <string> parameters = new List <string>();
foreach (var token in tokens)
{
if (cmd.controlCommand == null)
{
cmd.controlCommand = token;
}
else
{
parameters.Add(token);
}
}
cmd.parameters = parameters.ToArray();
return(cmd);
}
/// <summary>
/// Opens a filestream to the given filename
/// </summary>
/// <param name="fileName"></param>
/// <param name="command"></param>
/// <returns></returns>
private async Task <Stream> OpenFileStreamAsync(string fileName, FTPCommand command)
{
EnsureLoggedIn();
Logger?.LogDebug($"[FTPClient] Opening filestream for {fileName}, {command}");
dataStream = await ConnectDataStreamAsync();
var retrResponse = await ControlStream.SendCommandAsync(new FTPCommandEnvelope
{
FTPCommand = command,
Data = fileName
});
if ((retrResponse.FTPStatusCode != FTPStatusCode.DATAALREADYOPEN) &&
(retrResponse.FTPStatusCode != FTPStatusCode.OPENINGDATA) &&
(retrResponse.FTPStatusCode != FTPStatusCode.CLOSINGDATA))
{
throw new FTPException(retrResponse.ResponseMessage);
}
return(dataStream);
}
public void DownLoadFile(string filename, int size)
{
FTPCommand portCommand = new FTPCommand("PORT", new string[] { controlPort.ToString() });
if (!SendMessageToServerAndWaitReply(portCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
ListenDataPort();
PostMessageToConsoleWithLock("开始下载" + filename);
FTPCommand downloadCommand = new FTPCommand("RETR", new string[] { filename });
if (!SendMessageToServerAndWaitReply(downloadCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
try
{
FileStream fs = File.OpenWrite(downloadDirectory + filename);
NetworkStream dataStream = dataClient.GetStream();
currenttransfer = new FileTransfer()
{
networkStream = dataStream,
filestream = fs,
};
currenttransfer.DownloadAsync(() =>
{
fs.Close();
dataStream.Close();
PostMessageToConsoleWithLock("完成下载");
});
}
catch (Exception exc)
{
PostMessageToConsoleWithLock(exc.Message);
}
}
public void UploadFile(string filepath)
{
FTPCommand portCommand = new FTPCommand("PORT", new string[] { controlPort.ToString() });
if (!SendMessageToServerAndWaitReply(portCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
ListenDataPort();
PostMessageToConsoleWithLock("开始上传" + Path.GetFileName(filepath));
FTPCommand uploadCommand = new FTPCommand("STOR", new string[] { Path.GetFileName(Path.GetFileName(filepath)) });
if (!SendMessageToServerAndWaitReply(uploadCommand.ToString() + MyFTPHelper.FTPNewLine))
{
return;
}
try
{
FileStream fs = File.OpenRead(filepath);
NetworkStream dataStream = dataClient.GetStream();
currenttransfer = new FileTransfer()
{
networkStream = dataStream,
filestream = fs,
};
currenttransfer.UploadAsync(() =>
{
fs.Close();
dataStream.Close();
PostMessageToConsoleWithLock("完成上传");
});
}
catch (Exception exc)
{
PostMessageToConsoleWithLock(exc.Message);
}
}
public void UpdateList()
{
FTPCommand fileListCommand = new FTPCommand("LIST", null);
SendMessageToServerAndWaitReply(fileListCommand.ToString() + MyFTPHelper.FTPNewLine);
}
public void Start()
{
while (true)
{
try
{
FTPCommand?ncommand = ReadNextCommand();
if (ncommand == null)
{
continue;
}
else
{
FTPCommand command = ncommand.Value;
FTPReply reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxError
};
switch (command.controlCommand)
{
case "USER": //USER 指定账号
if (command.parameters.Length != 1)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxErrorPara,
};
break;
}
user.username = command.parameters[0];
break;
case "PASS": //PASS 指定密码
if (command.parameters.Length != 1)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxErrorPara,
};
break;
}
user.password = command.parameters[0];
if (serverDispatcher.CheckUserWithLock(user))
{
Logined = true;
serverDispatcher.PostMessageFromClient("已成功登录", this);
reply = new FTPReply()
{
replyCode = FTPReply.Code_UserLoggedIn,
post = "login success"
};
}
else
{
serverDispatcher.PostMessageFromClient("密码或用户名有误", this);
reply = new FTPReply()
{
replyCode = FTPReply.Code_UserNotLogIn,
post = "login fail"
};
}
break;
case "LIST": //LIST 返回服务器的文件目录（标准中不指定返回格式，格式为我们自定义）
reply = new FTPReply()
{
replyCode = FTPReply.Code_FileList,
post = serverDispatcher.GetEncodedFileList()
};
break;
case "STOR": //STOR 客户端上传文件
if (command.parameters.Length != 1)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxErrorPara
};
break;
}
string filename = command.parameters[0];
FileStream downloadFileStream = File.OpenWrite(serverDispatcher.GetCurrentDirectory() + filename);
NetworkStream downloadDataStream = dataClient.GetStream();
if (downloadFileStream == null)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_CantOopenDataConnection
};
break;
}
if (dataClient == null)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_ConnectionClosed
};
break;
}
currentTransfer = new FileTransfer()
{
networkStream = downloadDataStream,
filestream = downloadFileStream,
};
currentTransfer.DownloadAsync(() =>
{
downloadDataStream.Close();
downloadFileStream.Close();
serverDispatcher.PostMessageFromClient("文件上传完成", this);
}
);
reply = new FTPReply()
{
replyCode = FTPReply.Code_ConnectionClosed
};
break;
case "RETR": //RETR 客户端下载文件
if (command.parameters.Length != 1)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxErrorPara
};
break;
}
FileStream uploadFileStream = serverDispatcher.OpenFileStreamInfileList(command.parameters[0]);
NetworkStream uploadDataStream = dataClient.GetStream();
if (uploadFileStream == null)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_CantOopenDataConnection
};
break;
}
if (dataClient == null)
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_ConnectionClosed
};
break;
}
currentTransfer = new FileTransfer()
{
networkStream = uploadDataStream,
filestream = uploadFileStream,
};
currentTransfer.UploadAsync(() =>
{
uploadDataStream.Close();
uploadFileStream.Close();
serverDispatcher.PostMessageFromClient("文件上传完成", this);
}
);
reply = new FTPReply()
{
replyCode = FTPReply.Code_ConnectionClosed
};
break;
case "ABOR": //QUIT 关闭与服务器的连接
throw new NotImplementedException();
case "QUIT": //ABOR 放弃之前的文件传输
throw new NotImplementedException();
case "PASV": //PASV 数据线程让服务器监听特定端口
throw new NotImplementedException();
case "PORT": //PORT 客户端的控制端口为N，数据端口为N+1，服务器的控制端口为21，数据端口为20
if (command.parameters.Length != 1 || !int.TryParse(command.parameters[0], out controlPort))
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_SyntaxErrorPara
};
break;
}
if (!serverDispatcher.CheckDataPortLegal(controlPort, this))
{
reply = new FTPReply()
{
replyCode = FTPReply.Code_CantOopenDataConnection
};
break;
}
var remoteDataEnd = (IPEndPoint)controlClient.Client.RemoteEndPoint;
remoteDataEnd.Port = controlPort + 1;
dataClient = new TcpClient();
reply = new FTPReply()
{
replyCode = FTPReply.Code_DataConnectionOpen
};
dataClient.ConnectAsync(remoteDataEnd.Address.MapToIPv4(), remoteDataEnd.Port);
serverDispatcher.PostMessageFromClient("与" + user.username + "建立数据连接", this);
break;
default:
break;
}
MyFTPHelper.WriteToNetStream(reply.ToString(), controlStream);
}
}
catch (System.IO.IOException exc)
{
serverDispatcher.PostMessageFromClient(exc.Message, this);
controlClient.Close();
controlStream.Close();
return;
}
}
}
