private void _serverSocket_OnReceived(string id, string msg)
{
try
{
OnLog($"收到命令：{msg.Trim()}", null);
var cr = ClientRequest.Parse(msg);
var cmd = Enum.Parse(typeof(FTPCommand), cr.Cmd);
var userName = FTPServerConfigManager.GetUserBind(id);
var user = FTPServerConfigManager.GetUser(userName);
switch (cmd)
{
case FTPCommand.USER:
if (!string.IsNullOrEmpty(cr.Arg))
{
userName = cr.Arg;
user = FTPServerConfigManager.GetUser(userName);
if (user == null)
{
_cmdSocket.Reply(id, ServerResponseCode.无效的用户名, "Invalid user name.");
}
else
{
if (FTPServerConfigManager.GetUserBind(id) == user.UserName)
{
if (user.IsLogin == true)
{
_cmdSocket.Reply(id, ServerResponseCode.初始命令没有执行, "Already logged-in.");
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.要求密码, "User name okay, need password.");
}
}
else
{
if (user.UserName.ToLower() == "anonymous")
{
FTPServerConfigManager.UserBinding(id, user.UserName);
_cmdSocket.Reply(id, ServerResponseCode.登录成功, "User logged in, proceed.");
}
else
{
FTPServerConfigManager.UserBinding(id, user.UserName);
_cmdSocket.Reply(id, ServerResponseCode.要求密码, "User name okay, need password.");
}
}
}
}
return;
case FTPCommand.PASS:
if (!string.IsNullOrEmpty(userName))
{
if (user.IsLogin)
{
_cmdSocket.Reply(id, ServerResponseCode.初始命令没有执行, "Already logged-in.");
}
else
{
if (FTPServerConfigManager.UserLogin(userName, cr.Arg))
{
_cmdSocket.Reply(id, ServerResponseCode.登录成功, "User logged in, proceed.");
OnLog($"{userName}登录成功", null);
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.无效的用户名, "Authentication failed.");
}
}
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.错误指令序列, "Login with USER first.");
}
return;
case FTPCommand.SYST:
_cmdSocket.Reply(id, ServerResponseCode.系统类型回复, "WINDOWS Type: SAEA FTP Server");
return;
case FTPCommand.OPTS:
case FTPCommand.NOOP:
_cmdSocket.Reply(id, ServerResponseCode.成功, "WINDOWS Type: SAEA FTP Server");
_cmdSocket.Reply(id, ServerResponseCode.成功, "Command okay.");
return;
case FTPCommand.QUIT:
_cmdSocket.Reply(id, ServerResponseCode.退出网络, "SAEA FTP: Goodbye.");
OnLog($"{userName}退出网络", null);
return;
}
if (user == null || !user.IsLogin)
{
_cmdSocket.Reply(id, ServerResponseCode.错误指令序列, "Login with USER first.");
return;
}
if (string.IsNullOrWhiteSpace(user.CurrentFtpPath) || user.CurrentFtpPath == "/" || user.CurrentFtpPath == "\\")
{
user.CurrentPath = user.Root;
user.CurrentFtpPath = "/";
}
switch (cmd)
{
case FTPCommand.CWD:
if (PathHelper.Combine(user.CurrentPath, cr.Arg, out string newDirPath))
{
user.CurrentFtpPath += cr.Arg + "/";
user.CurrentFtpPath = user.CurrentFtpPath.Replace("//", "/");
user.CurrentPath = newDirPath;
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Command okay.");
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such directory.");
}
break;
case FTPCommand.CDUP:
var parentDir = PathHelper.GetParent(user.CurrentPath);
if (parentDir != null)
{
if (!PathHelper.IsParent(parentDir.ToString(), user.Root))
{
var cstr = user.CurrentFtpPath.Substring(0, user.CurrentFtpPath.LastIndexOf("/"));
user.CurrentFtpPath = cstr.Substring(0, cstr.LastIndexOf("/") + 1);
user.CurrentFtpPath = user.CurrentFtpPath.Replace("//", "/");
user.CurrentPath = parentDir.ToString();
}
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Command okay.");
return;
}
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such directory.");
break;
case FTPCommand.PWD:
_cmdSocket.Reply(id, ServerResponseCode.路径名建立, $"\"{ user.CurrentFtpPath}\"");
break;
case FTPCommand.PASV:
var dataPort = IPHelper.GetFreePort();
var portStr = dataPort.PortToString();
var pasvStr = $"SAEA FTPServer PASV({_serverConfig.IP.Replace(".", ",")},{portStr})";
_cmdSocket.CreateDataSocket(userName, dataPort, _serverConfig.BufferSize);
OnLog($"{userName}进入被动模式，已创建数据传输Socket:{_serverConfig.IP}:{dataPort}", null);
_cmdSocket.Reply(id, ServerResponseCode.进入被动模式, pasvStr);
break;
case FTPCommand.PORT:
_cmdSocket.Reply(id, ServerResponseCode.禁用, "Port is disabled.");
break;
case FTPCommand.MLSD:
if (!string.IsNullOrEmpty(cr.Arg) && cr.Arg != "/")
{
PathHelper.Combine(user.CurrentPath, cr.Arg, out newDirPath);
if (string.IsNullOrEmpty(newDirPath))
{
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such directory.");
return;
}
}
var dirList = PathHelper.GetDirectories(user.CurrentPath, out List <FileInfo> fileList);
StringBuilder sb = new StringBuilder();
if (dirList != null && dirList.Any())
{
foreach (var item in dirList)
{
if (item == dirList.Last())
{
sb.Append($"type=dir;modify={item.LastWriteTime.ToFileTimeUtc()}; {item.Name}");
}
else
{
sb.AppendLine($"type=dir;modify={item.LastWriteTime.ToFileTimeUtc()}; {item.Name}");
}
}
}
if (fileList != null && fileList.Any())
{
if (sb.Length > 0)
{
sb.Append(Environment.NewLine);
}
foreach (var item in fileList)
{
if (item == fileList.Last())
{
sb.Append($"type=file;modify={item.LastWriteTime.ToFileTimeUtc()};size={item.Length}; {item.Name}");
}
else
{
sb.AppendLine($"type=file;modify={item.LastWriteTime.ToFileTimeUtc()};size={item.Length}; {item.Name}");
}
}
}
var str = sb.ToString();
_cmdSocket.SendData(userName, Encoding.UTF8.GetBytes(str));
OnLog($"已发送数据到{userName}", null);
_cmdSocket.Reply(id, ServerResponseCode.打开连接, "File status okay; about to open data connection.");
break;
case FTPCommand.NLST:
if (!string.IsNullOrEmpty(cr.Arg) && cr.Arg != "/")
{
PathHelper.Combine(user.CurrentPath, cr.Arg, out newDirPath);
if (string.IsNullOrEmpty(newDirPath))
{
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such directory.");
return;
}
}
dirList = PathHelper.GetDirectories(user.CurrentPath, out fileList);
sb = new StringBuilder();
if (dirList != null && dirList.Any())
{
foreach (var item in dirList)
{
if (item == dirList.Last())
{
sb.Append($"{item.FullName.Replace(user.CurrentPath, "").Replace("\\", "/")}");
}
else
{
sb.AppendLine($"{item.FullName.Replace(user.CurrentPath, "").Replace("\\", "/")}");
}
}
}
if (fileList != null && fileList.Any())
{
if (sb.Length > 0)
{
sb.Append(Environment.NewLine);
}
foreach (var item in fileList)
{
if (item == fileList.Last())
{
sb.Append($"{item.FullName.Replace(user.CurrentPath, "").Replace("\\", "/")}");
}
else
{
sb.AppendLine($"{item.FullName.Replace(user.CurrentPath, "").Replace("\\", "/")}");
}
}
}
str = sb.ToString();
if (!string.IsNullOrEmpty(str))
{
_cmdSocket.SendData(userName, Encoding.UTF8.GetBytes(str));
OnLog($"已发送数据到{userName}", null);
}
_cmdSocket.Reply(id, ServerResponseCode.打开连接, "File status okay; about to open data connection.");
break;
case FTPCommand.SIZE:
var fileName = cr.Arg;
var filePath = PathHelper.Combine(user.CurrentPath, fileName);
var fileInfo = FileHelper.GetFileInfo(filePath);
if (fileInfo != null)
{
_cmdSocket.Reply(id, ServerResponseCode.文件状态回复, fileInfo.Length.ToString());
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such file.");
}
break;
case FTPCommand.RETR:
fileName = cr.Arg;
filePath = PathHelper.Combine(user.CurrentPath, fileName);
fileInfo = FileHelper.GetFileInfo(filePath);
if (fileInfo != null)
{
_cmdSocket.Reply(id, ServerResponseCode.打开连接, fileInfo.Length.ToString());
_cmdSocket.SendFile(userName, filePath);
OnLog($"已发送文件{fileName}到{userName}", null);
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "No such file.");
}
break;
case FTPCommand.STOR:
try
{
fileName = cr.Arg;
filePath = PathHelper.Combine(user.CurrentPath, fileName);
if (!string.IsNullOrEmpty(filePath))
{
_cmdSocket.Reply(id, ServerResponseCode.打开连接, "Opening data connection.");
_cmdSocket.ReceiveFile(userName, filePath);
OnLog($"已从{userName}接收到文件{fileName}", null);
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.输出文件出错, "Error on output file.");
}
break;
}
catch (Exception ex)
{
OnLog($"从{userName}接收文件时出现异常", ex);
}
break;
case FTPCommand.MKD:
try
{
fileName = cr.Arg;
filePath = PathHelper.Combine(user.CurrentPath, fileName);
PathHelper.CreateDir(filePath);
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Directory created.");
break;
}
catch (Exception ex)
{
OnLog($"{userName}创建目录{cr.Arg}时出现异常", ex);
}
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "Cannot create directory.");
break;
case FTPCommand.RMD:
try
{
fileName = cr.Arg;
filePath = PathHelper.Combine(user.CurrentPath, fileName);
PathHelper.Remove(filePath);
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Directory removed.");
break;
}
catch (Exception ex)
{
OnLog($"{userName}移除目录{cr.Arg}时出现异常", ex);
}
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "Cannot remove directory.");
break;
case FTPCommand.DELE:
try
{
fileName = cr.Arg;
filePath = PathHelper.Combine(user.CurrentPath, fileName);
FileHelper.Remove(filePath);
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "File removed.");
break;
}
catch (Exception ex)
{
OnLog($"{userName}移除文件{cr.Arg}时出现异常", ex);
}
_cmdSocket.Reply(id, ServerResponseCode.找不到文件或文件夹, "Cannot remove File.");
break;
}
}
catch (Exception ex)
{
OnLog("FTPServer Error OnReceive 未知的命令", ex);
}
}
private void _serverSocket_OnReceived(string id, string msg)
{
var cr = ClientRequest.Parse(msg);
var cmd = Enum.Parse(typeof(FTPCommand), cr.Cmd);
var userName = FTPServerConfigManager.GetUserBind(id);
var user = FTPServerConfigManager.GetUser(userName);
switch (cmd)
{
case FTPCommand.USER:
if (!string.IsNullOrEmpty(cr.Arg))
{
if (user == null)
{
_cmdSocket.Reply(id, ServerResponseCode.无效的用户名, "Invalid user name.");
}
else
{
if (FTPServerConfigManager.GetUserBind(id) == user.UserName)
{
if (user.IsLogin == true)
{
_cmdSocket.Reply(id, ServerResponseCode.初始命令没有执行, "Already logged-in.");
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.要求密码, "User name okay, need password.");
}
}
else
{
if (user.UserName.ToLower() == "anonymous")
{
FTPServerConfigManager.UserBinding(id, user.UserName);
_cmdSocket.Reply(id, ServerResponseCode.登录因特网, "User logged in, proceed.");
}
else
{
FTPServerConfigManager.UserBinding(id, user.UserName);
_cmdSocket.Reply(id, ServerResponseCode.要求密码, "User name okay, need password.");
}
}
}
}
return;
case FTPCommand.PASS:
if (!string.IsNullOrEmpty(userName))
{
if (user.IsLogin)
{
_cmdSocket.Reply(id, ServerResponseCode.初始命令没有执行, "Already logged-in.");
}
else
{
if (FTPServerConfigManager.UserLogin(userName, cr.Arg))
{
_cmdSocket.Reply(id, ServerResponseCode.登录因特网, "User logged in, proceed.");
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.无效的用户名, "Authentication failed.");
}
}
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.错误指令序列, "Login with USER first.");
}
return;
case FTPCommand.SYST:
_cmdSocket.Reply(id, ServerResponseCode.系统类型回复, "WINDOWS Type: SAEA FTP Server");
return;
case FTPCommand.NOOP:
_cmdSocket.Reply(id, ServerResponseCode.成功, "Command okay.");
return;
}
if (user == null || !user.IsLogin)
{
_cmdSocket.Reply(id, ServerResponseCode.错误指令序列, "Login with USER first.");
return;
}
switch (cmd)
{
case FTPCommand.CWD:
if (PathHelper.Exists(user.Root, cr.Arg, out string newDirPath))
{
user.CurrentFtpPath = newDirPath;
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Command okay.");
}
else
{
_cmdSocket.Reply(id, ServerResponseCode.页文件不可用, "No such directory.");
}
break;
case FTPCommand.CDUP:
if (PathHelper.Exists(user.CurrentFtpPath, "../", out newDirPath))
{
if (!PathHelper.IsParent(newDirPath, user.Root))
{
user.CurrentFtpPath = newDirPath;
_cmdSocket.Reply(id, ServerResponseCode.文件行为完成, "Command okay.");
return;
}
}
_cmdSocket.Reply(id, ServerResponseCode.页文件不可用, "No such directory.");
break;
case FTPCommand.PWD:
_cmdSocket.Reply(id, ServerResponseCode.路径名建立, $"\"{ user.CurrentFtpPath}\"");
break;
case FTPCommand.PASV:
var dataPort = IPHelper.GetFreePort();
var portStr = dataPort.PortToString();
var pasvStr = $"SAEA FTPServer PASV({_serverConfig.IP},{portStr})";
_cmdSocket.CreateDataSocket(userName, dataPort, _serverConfig.BufferSize);
_cmdSocket.Reply(id, ServerResponseCode.进入被动模式, pasvStr);
break;
case FTPCommand.MLSD:
var path = user.CurrentFtpPath;
if (!string.IsNullOrEmpty(cr.Arg) && cr.Arg != "/")
{
if (PathHelper.Exists(path, cr.Arg, out newDirPath))
{
path = newDirPath;
}
}
var dirList = PathHelper.GetDirectories(path, out List <FileInfo> fileList);
StringBuilder sb = new StringBuilder();
if (dirList != null && dirList.Any())
{
foreach (var item in dirList)
{
sb.AppendLine($"type=dir;modify={item.LastWriteTime.ToFileTimeUtc()}; {item.Name}");
}
}
if (fileList != null && fileList.Any())
{
foreach (var item in fileList)
{
sb.AppendLine($"type=file;modify={item.LastWriteTime.ToFileTimeUtc()}; {item.Name}");
}
}
var str = sb.ToString();
if (!string.IsNullOrEmpty(str))
{
_cmdSocket.SendData(userName, Encoding.UTF8.GetBytes(str));
}
break;
case FTPCommand.NLST:
path = user.CurrentFtpPath;
if (!string.IsNullOrEmpty(cr.Arg) && cr.Arg != "/")
{
if (PathHelper.Exists(path, cr.Arg, out newDirPath))
{
path = newDirPath;
}
}
dirList = PathHelper.GetDirectories(path, out fileList);
sb = new StringBuilder();
if (dirList != null && dirList.Any())
{
foreach (var item in dirList)
{
sb.AppendLine($"{item.FullName.Replace(user.CurrentFtpPath, "").Replace("\\", "/")}");
}
}
if (fileList != null && fileList.Any())
{
foreach (var item in fileList)
{
sb.AppendLine($"{item.FullName.Replace(user.CurrentFtpPath, "").Replace("\\", "/")}");
}
}
str = sb.ToString();
if (!string.IsNullOrEmpty(str))
{
_cmdSocket.SendData(userName, Encoding.UTF8.GetBytes(str));
}
break;
}
}
