C#使用Sockets操作FTP

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using  System; using  System.Collections; using  System.IO; using  System.Net; using  System.Net.Sockets; using  System.Text; using  System.Text.RegularExpressions;   /* *解析drwxr-xr-x *第一位表示文件類型。d是目錄文件，l是鏈接文件，-是普通文件，p是管道 *第2-4位表示這個文件的屬主擁有的權限，r是讀，w是寫，x是執行。 *第5-7位表示和這個文件屬主所在同一個組的用戶所具有的權限。 *第8-10位表示其他用戶所具有的權限。 *例如： * drwxr-xr-x 1 ftp ftp              0 Mar 02  2011 a安全防護 * -r--r--r-- 1 ftp ftp       27772416 Mar 02  2011 0302 */ namespace  JM_IM_COMP.tool {      /// <summary>      /// FTP類      /// </summary>      public  class  FTP      {          #region 變量聲明            /// <summary>          /// 服務器連接地址          /// </summary>          public  string  server;            /// <summary>          /// 登陸帳號          /// </summary>          public  string  user;            /// <summary>          /// 登陸口令          /// </summary>          public  string  pass;            /// <summary>          /// 端口號          /// </summary>          public  int  port;            /// <summary>          /// 無響應時間（FTP在指定時間內無響應）          /// </summary>          public  int  timeout;            /// <summary>          /// 服務器錯誤狀態信息          /// </summary>          public  string  errormessage;              /// <summary>          /// 服務器狀態返回信息          /// </summary>          private  string  messages;            /// <summary>          /// 服務器的響應信息          /// </summary>          private  string  responseStr;            /// <summary>          /// 鏈接模式（主動或被動，默認為被動）          /// </summary>          private  bool  passive_mode;            /// <summary>          /// 上傳或下載信息字節數          /// </summary>          private  long  bytes_total;            /// <summary>          /// 上傳或下載的文件大小          /// </summary>          private  long  file_size;            /// <summary>          /// 主套接字          /// </summary>          private  Socket main_sock;            /// <summary>          /// 要鏈接的網絡地址終結點          /// </summary>          private  IPEndPoint main_ipEndPoint;            /// <summary>          /// 偵聽套接字          /// </summary>          private  Socket listening_sock;            /// <summary>          /// 數據套接字          /// </summary>          private  Socket data_sock;            /// <summary>          /// 要鏈接的網絡數據地址終結點          /// </summary>          private  IPEndPoint data_ipEndPoint;            /// <summary>          /// 用於上傳或下載的文件流對象          /// </summary>          private  FileStream file;            /// <summary>          /// 與FTP服務器交互的狀態值          /// </summary>          private  int  response;            /// <summary>          /// 讀取並保存當前命令執行后從FTP服務器端返回的數據信息          /// </summary>          private  string  bucket;            #endregion            #region 構造函數            /// <summary>          /// 構造函數          /// </summary>          public  FTP()          {              server =  null ;              user =  null ;              pass =  null ;              port = 21;              passive_mode =  true ;              main_sock =  null ;              main_ipEndPoint =  null ;              listening_sock =  null ;              data_sock =  null ;              data_ipEndPoint =  null ;              file =  null ;              bucket =  "" ;              bytes_total = 0;              timeout = 10000;     //無響應時間為10秒              messages =  "" ;              errormessage =  "" ;          }            /// <summary>          /// 構造函數          /// </summary>          /// <param name="server">服務器IP或名稱</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          public  FTP( string  server,  string  user,  string  pass)          {              this .server = server;              this .user = user;              this .pass = pass;              port = 21;              passive_mode =  true ;              main_sock =  null ;              main_ipEndPoint =  null ;              listening_sock =  null ;              data_sock =  null ;              data_ipEndPoint =  null ;              file =  null ;              bucket =  "" ;              bytes_total = 0;              timeout = 10000;     //無響應時間為10秒              messages =  "" ;              errormessage =  "" ;          }            /// <summary>          /// 構造函數          /// </summary>          /// <param name="server">服務器IP或名稱</param>          /// <param name="port">端口號</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          public  FTP( string  server,  int  port,  string  user,  string  pass)          {              this .server = server;              this .user = user;              this .pass = pass;              this .port = port;              passive_mode =  true ;              main_sock =  null ;              main_ipEndPoint =  null ;              listening_sock =  null ;              data_sock =  null ;              data_ipEndPoint =  null ;              file =  null ;              bucket =  "" ;              bytes_total = 0;              timeout = 10000;     //無響應時間為10秒              messages =  "" ;              errormessage =  "" ;          }              /// <summary>          /// 構造函數          /// </summary>          /// <param name="server">服務器IP或名稱</param>          /// <param name="port">端口號</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          /// <param name="mode">鏈接方式</param>          public  FTP( string  server,  int  port,  string  user,  string  pass,  int  mode)          {              this .server = server;              this .user = user;              this .pass = pass;              this .port = port;              passive_mode = mode <= 1 ?  true  :  false ;              main_sock =  null ;              main_ipEndPoint =  null ;              listening_sock =  null ;              data_sock =  null ;              data_ipEndPoint =  null ;              file =  null ;              bucket =  "" ;              bytes_total = 0;              this .timeout = 10000;     //無響應時間為10秒              messages =  "" ;              errormessage =  "" ;          }            /// <summary>          /// 構造函數          /// </summary>          /// <param name="server">服務器IP或名稱</param>          /// <param name="port">端口號</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          /// <param name="mode">鏈接方式</param>          /// <param name="timeout">無響應時間(限時),單位:秒 (小於或等於0為不受時間限制)</param>          public  FTP( string  server,  int  port,  string  user,  string  pass,  int  mode,  int  timeout_sec)          {              this .server = server;              this .user = user;              this .pass = pass;              this .port = port;              passive_mode = mode <= 1 ?  true  :  false ;              main_sock =  null ;              main_ipEndPoint =  null ;              listening_sock =  null ;              data_sock =  null ;              data_ipEndPoint =  null ;              file =  null ;              bucket =  "" ;              bytes_total = 0;              this .timeout = (timeout_sec <= 0) ?  int .MaxValue : (timeout_sec * 1000);     //無響應時間              messages =  "" ;              errormessage =  "" ;          }            #endregion            #region 屬性          /// <summary>          /// 當前是否已連接          /// </summary>          public  bool  IsConnected          {              get              {                  if  (main_sock !=  null )                      return  main_sock.Connected;                  return  false ;              }          }            /// <summary>          /// 當message緩沖區有數據則返回          /// </summary>          public  bool  MessagesAvailable          {              get              {                  if  (messages.Length > 0)                      return  true ;                  return  false ;              }          }            /// <summary>          /// 獲取服務器狀態返回信息, 並清空messages變量          /// </summary>          public  string  Messages          {              get              {                  string  tmp = messages;                  messages =  "" ;                  return  tmp;              }          }          /// <summary>          /// 最新指令發出后服務器的響應          /// </summary>          public  string  ResponseString          {              get              {                  return  responseStr;              }          }              /// <summary>          ///在一次傳輸中,發送或接收的字節數          /// </summary>          public  long  BytesTotal          {              get              {                  return  bytes_total;              }          }            /// <summary>          ///被下載或上傳的文件大小,當文件大小無效時為0          /// </summary>          public  long  FileSize          {              get              {                  return  file_size;              }          }            /// <summary>          /// 鏈接模式:          /// true 被動模式 [默認]          /// false: 主動模式          /// </summary>          public  bool  PassiveMode          {              get              {                  return  passive_mode;              }              set              {                  passive_mode = value;              }          }            #endregion            #region 操作            /// <summary>          /// 操作失敗          /// </summary>          private  void  Fail()          {              Disconnect();              errormessage += responseStr;              //throw new Exception(responseStr);          }            /// <summary>          /// 下載文件類型          /// </summary>          /// <param name="mode">true:二進制文件 false:字符文件</param>          private  void  SetBinaryMode( bool  mode)          {              if  (mode)                  SendCommand( "TYPE I" );              else                  SendCommand( "TYPE A" );                ReadResponse();              if  (response != 200)                  Fail();          }            /// <summary>          /// 發送命令          /// </summary>          /// <param name="command"></param>          private  void  SendCommand( string  command)          {              Byte[] cmd = Encoding.Default.GetBytes((command +  "\r\n" ).ToCharArray());                if  (command.Length > 3 && command.Substring(0, 4) ==  "PASS" )              {                  messages =  "\rPASS xxx" ;              }              else              {                  messages =  "\r"  + command;              }                try              {                  main_sock.Send(cmd, cmd.Length, 0);              }              catch  (Exception ex)              {                  try                  {                      Disconnect();                      errormessage += ex.Message;                      return ;                  }                  catch                  {                      main_sock.Close();                      file.Close();                      main_sock =  null ;                      main_ipEndPoint =  null ;                      file =  null ;                  }              }          }              private  void  FillBucket()          {              Byte[] bytes =  new  Byte[512];              long  bytesgot;              int  msecs_passed = 0;                while  (main_sock.Available < 1)              {                  System.Threading.Thread.Sleep(50);                  msecs_passed += 50;                  //當等待時間到,則斷開鏈接                  if  (msecs_passed > timeout)                  {                      Disconnect();                      errormessage +=  "Timed out waiting on server to respond." ;                      return ;                  }              }                while  (main_sock.Available > 0)              {                  bytesgot = main_sock.Receive(bytes, 512, 0);                  bucket += Encoding.Default.GetString(bytes, 0, ( int ) bytesgot);                  System.Threading.Thread.Sleep(50);              }          }              private  string  GetLineFromBucket()          {              int  i;              string  buf =  "" ;                if  ((i = bucket.IndexOf( '\n' )) < 0)              {                  while  (i < 0)                  {                      FillBucket();                      i = bucket.IndexOf( '\n' );                  }              }                buf = bucket.Substring(0, i);              bucket = bucket.Substring(i + 1);                return  buf;          }              /// <summary>          /// 返回服務器端返回信息          /// </summary>          private  void  ReadResponse()          {              string  buf;              messages =  "" ;                while  ( true )              {                  buf = GetLineFromBucket();                    if  (Regex.Match(buf,  "^[0-9]+ " ).Success)                  {                      responseStr = buf;                      response =  int .Parse(buf.Substring(0, 3));                      break ;                  }                  else                      messages += Regex.Replace(buf,  "^[0-9]+-" ,  "" ) +  "\n" ;              }          }              /// <summary>          /// 打開數據套接字          /// </summary>          private  void  OpenDataSocket()          {              if  (passive_mode)              {                  string [] pasv;                  string  server;                  int  port;                    Connect();                  SendCommand( "PASV" );                  ReadResponse();                  if  (response != 227)                      Fail();                    try                  {                      int  i1, i2;                        i1 = responseStr.IndexOf( '(' ) + 1;                      i2 = responseStr.IndexOf( ')' ) - i1;                      pasv = responseStr.Substring(i1, i2).Split( ',' );                  }                  catch  (Exception)                  {                      Disconnect();                      errormessage +=  "Malformed PASV response: "  + responseStr;                      return ;                  }                    if  (pasv.Length < 6)                  {                      Disconnect();                      errormessage +=  "Malformed PASV response: "  + responseStr;                      return ;                  }                    server = String.Format( "{0}.{1}.{2}.{3}" , pasv[0], pasv[1], pasv[2], pasv[3]);                  port = ( int .Parse(pasv[4]) << 8) +  int .Parse(pasv[5]);                    try                  {                      CloseDataSocket();                        data_sock =  new  Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);   #if NET1                      data_ipEndPoint =  new  IPEndPoint(Dns.GetHostByName(server).AddressList[0], port); #else                      data_ipEndPoint =  new  IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port); #endif                        data_sock.Connect(data_ipEndPoint);                    }                  catch  (Exception ex)                  {                      errormessage +=  "Failed to connect for data transfer: "  + ex.Message;                      return ;                  }              }              else              {                  Connect();                    try                  {                      CloseDataSocket();                        listening_sock =  new  Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                        // 對於端口,則發送IP地址.下面則提取相應信息                      string  sLocAddr = main_sock.LocalEndPoint.ToString();                      int  ix = sLocAddr.IndexOf( ':' );                      if  (ix < 0)                      {                          errormessage +=  "Failed to parse the local address: "  + sLocAddr;                          return ;                      }                      string  sIPAddr = sLocAddr.Substring(0, ix);                      // 系統自動綁定一個端口號(設置 port = 0)                      System.Net.IPEndPoint localEP =  new  IPEndPoint(IPAddress.Parse(sIPAddr), 0);                        listening_sock.Bind(localEP);                      sLocAddr = listening_sock.LocalEndPoint.ToString();                      ix = sLocAddr.IndexOf( ':' );                      if  (ix < 0)                      {                          errormessage +=  "Failed to parse the local address: "  + sLocAddr;                        }                      int  nPort =  int .Parse(sLocAddr.Substring(ix + 1));                        // 開始偵聽鏈接請求                      listening_sock.Listen(1);                      string  sPortCmd =  string .Format( "PORT {0},{1},{2}" ,                                                      sIPAddr.Replace( '.' ,  ',' ),                                                      nPort / 256, nPort % 256);                      SendCommand(sPortCmd);                      ReadResponse();                      if  (response != 200)                          Fail();                  }                  catch  (Exception ex)                  {                      errormessage +=  "Failed to connect for data transfer: "  + ex.Message;                      return ;                  }              }          }              private  void  ConnectDataSocket()          {              if  (data_sock !=  null )         // 已鏈接                  return ;                try              {                  data_sock = listening_sock.Accept();     // Accept is blocking                  listening_sock.Close();                  listening_sock =  null ;                    if  (data_sock ==  null )                  {                      throw  new  Exception( "Winsock error: "  +                          Convert.ToString(System.Runtime.InteropServices.Marshal.GetLastWin32Error()));                  }              }              catch  (Exception ex)              {                  errormessage +=  "Failed to connect for data transfer: "  + ex.Message;              }          }              private  void  CloseDataSocket()          {              if  (data_sock !=  null )              {                  if  (data_sock.Connected)                  {                      data_sock.Close();                  }                  data_sock =  null ;              }                data_ipEndPoint =  null ;          }            /// <summary>          /// 關閉所有鏈接          /// </summary>          public  void  Disconnect()          {              CloseDataSocket();                if  (main_sock !=  null )              {                  if  (main_sock.Connected)                  {                      SendCommand( "QUIT" );                      main_sock.Close();                  }                  main_sock =  null ;              }                if  (file !=  null )                  file.Close();                main_ipEndPoint =  null ;              file =  null ;          }            /// <summary>          /// 鏈接到FTP服務器          /// </summary>          /// <param name="server">要鏈接的IP地址或主機名</param>          /// <param name="port">端口號</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          public  void  Connect( string  server,  int  port,  string  user,  string  pass)          {              this .server = server;              this .user = user;              this .pass = pass;              this .port = port;                Connect();          }            /// <summary>          /// 鏈接到FTP服務器          /// </summary>          /// <param name="server">要鏈接的IP地址或主機名</param>          /// <param name="user">登陸帳號</param>          /// <param name="pass">登陸口令</param>          public  void  Connect( string  server,  string  user,  string  pass)          {              this .server = server;              this .user = user;              this .pass = pass;                Connect();          }            /// <summary>          /// 鏈接到FTP服務器          /// </summary>          public  bool  Connect()          {              if  (server ==  null )              {                  errormessage +=  "No server has been set.\r\n" ;              }              if  (user ==  null )              {                  errormessage +=  "No server has been set.\r\n" ;              }                if  (main_sock !=  null )                  if  (main_sock.Connected)                      return  true ;                try              {                  main_sock =  new  Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); #if NET1                  main_ipEndPoint =  new  IPEndPoint(Dns.GetHostByName(server).AddressList[0], port); #else                  main_ipEndPoint =  new  IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port); #endif                    main_sock.Connect(main_ipEndPoint);              }              catch  (Exception ex)              {                  errormessage += ex.Message;                  return  false ;              }                ReadResponse();              if  (response != 220)                  Fail();                SendCommand( "USER "  + user);              ReadResponse();                switch  (response)              {              case  331:                  if  (pass ==  null )                  {                      Disconnect();                      errormessage +=  "No password has been set." ;                      return  false ;                  }                  SendCommand( "PASS "  + pass);                  ReadResponse();                  if  (response != 230)                  {                      Fail();                      return  false ;                  }                  break ;              case  230:                  break ;              }                return  true ;          }            /// <summary>          /// 獲取FTP當前(工作)目錄下的文件列表          /// </summary>          /// <returns>返回文件列表數組</returns>          public  ArrayList List()          {              Byte[] bytes =  new  Byte[512];              string  file_list =  "" ;              long  bytesgot = 0;              int  msecs_passed = 0;              ArrayList list =  new  ArrayList();                Connect();              OpenDataSocket();              SendCommand( "LIST" );              ReadResponse();                switch  (response)              {              case  125:              case  150:                  break ;              default :                  CloseDataSocket();                  throw  new  Exception(responseStr);              }              ConnectDataSocket();                while  (data_sock.Available < 1)              {                  System.Threading.Thread.Sleep(50);                  msecs_passed += 50;                    if  (msecs_passed > (timeout / 10))                  {                      break ;                  }              }                while  (data_sock.Available > 0)              {                  bytesgot = data_sock.Receive(bytes, bytes.Length, 0);                  //file_list += Encoding.ASCII.GetString(bytes, 0, (int) bytesgot);                  file_list += Encoding.Default.GetString(bytes, 0, ( int )bytesgot);                  System.Threading.Thread.Sleep(50);              }                CloseDataSocket();                ReadResponse();              if  (response != 226)                  throw  new  Exception(responseStr);                foreach  ( string  f  in  file_list.Split( '\n' ))              {                  if  (f.Length > 0 && !Regex.Match(f,  "^total" ).Success)                      list.Add(f.Substring(0, f.Length - 1));              }                return  list;          }            /// <summary>          /// 獲取到文件名列表          /// </summary>          /// <returns>返回文件名列表</returns>          public  ArrayList ListFiles()          {              ArrayList list =  new  ArrayList();                foreach  ( string  f  in  List())              {                  if  ((f.Length > 0))                  {                      if  ((f[0] !=  'd' ) && (f.ToUpper().IndexOf( "<DIR>" ) < 0))                          list.Add(f);                  }              }                return  list;          }            /// <summary>          /// 獲取路徑列表          /// </summary>          /// <returns>返回路徑列表</returns>          public  ArrayList ListDirectories()          {              ArrayList list =  new  ArrayList();                foreach  ( string  f  in  List())              {                  if  (f.Length > 0)                  {                      if  ((f[0] ==  'd' ) || (f.ToUpper().IndexOf( "<DIR>" ) >= 0))                          list.Add(f);                  }              }                return  list;          }            /// <summary>          /// 獲取原始數據信息.          /// </summary>          /// <param name="fileName">遠程文件名</param>          /// <returns>返回原始數據信息.</returns>          public  string  GetFileDateRaw( string  fileName)          {              Connect();                SendCommand( "MDTM "  + fileName);              ReadResponse();              if  (response != 213)              {                  errormessage += responseStr;                  return  "" ;              }                return  ( this .responseStr.Substring(4));          }            /// <summary>          /// 得到文件日期.          /// </summary>          /// <param name="fileName">遠程文件名</param>          /// <returns>返回遠程文件日期</returns>          public  DateTime GetFileDate( string  fileName)          {              return  ConvertFTPDateToDateTime(GetFileDateRaw(fileName));          }            private  DateTime ConvertFTPDateToDateTime( string  input)          {              if  (input.Length < 14)                  throw  new  ArgumentException( "Input Value for ConvertFTPDateToDateTime method was too short." );                //YYYYMMDDhhmmss":              int  year = Convert.ToInt16(input.Substring(0, 4));              int  month = Convert.ToInt16(input.Substring(4, 2));              int  day = Convert.ToInt16(input.Substring(6, 2));              int  hour = Convert.ToInt16(input.Substring(8, 2));              int  min = Convert.ToInt16(input.Substring(10, 2));              int  sec = Convert.ToInt16(input.Substring(12, 2));                return  new  DateTime(year, month, day, hour, min, sec);          }            /// <summary>          /// 獲取FTP上的當前(工作)路徑          /// </summary>          /// <returns>返回FTP上的當前(工作)路徑</returns>          public  string  GetWorkingDirectory()          {              //PWD - 顯示工作路徑              Connect();              SendCommand( "PWD" );              ReadResponse();                if  (response != 257)              {                  errormessage += responseStr;              }                string  pwd;              try              {                  pwd = responseStr.Substring(responseStr.IndexOf( "\"" , 0) + 1); //5);                  pwd = pwd.Substring(0, pwd.LastIndexOf( "\"" ));                  pwd = pwd.Replace( "\"\"" ,  "\"" );  // 替換帶引號的路徑信息符號              }              catch  (Exception ex)              {                  errormessage += ex.Message;                  return  null ;              }                return  pwd;          }              /// <summary>          /// 跳轉服務器上的當前(工作)路徑          /// </summary>          /// <param name="path">要跳轉的路徑</param>          public  bool  ChangeDir( string  path)          {              Connect();              SendCommand( "CWD "  + path);              ReadResponse();              if  (response != 250)              {                  errormessage += responseStr;                  return  false ;              }              return  true ;          }            /// <summary>          /// 創建指定的目錄          /// </summary>          /// <param name="dir">要創建的目錄</param>          public  void  MakeDir( string  dir)          {              Connect();              SendCommand( "MKD "  + dir);              ReadResponse();                switch  (response)              {              case  257:              case  250:                  break ;              default :                  {                      errormessage += responseStr;                      break ;                  }              }          }            /// <summary>          /// 移除FTP上的指定目錄          /// </summary>          /// <param name="dir">要移除的目錄</param>          public  void  RemoveDir( string  dir)          {              Connect();              SendCommand( "RMD "  + dir);              ReadResponse();              if  (response != 250)              {                  errormessage += responseStr;                  return ;                  ;              }          }            /// <summary>          /// 移除FTP上的指定文件          /// </summary>          /// <param name="filename">要移除的文件名稱</param>          public  void  RemoveFile( string  filename)          {              Connect();              SendCommand( "DELE "  + filename);              ReadResponse();              if  (response != 250)              {                  errormessage += responseStr;              }          }            /// <summary>          /// 重命名FTP上的文件          /// </summary>          /// <param name="oldfilename">原文件名</param>          /// <param name="newfilename">新文件名</param>          public  void  RenameFile( string  oldfilename,  string  newfilename)          {              Connect();              SendCommand( "RNFR "  + oldfilename);              ReadResponse();              if  (response != 350)              {                  errormessage += responseStr;              }              else              {                  SendCommand( "RNTO "  + newfilename);                  ReadResponse();                  if  (response != 250)                  {                      errormessage += responseStr;                  }              }          }            /// <summary>          /// 獲得指定文件的大小(如果FTP支持)          /// </summary>          /// <param name="filename">指定的文件</param>          /// <returns>返回指定文件的大小</returns>          public  long  GetFileSize( string  filename)          {              Connect();              SendCommand( "SIZE "  + filename);              ReadResponse();              if  (response != 213)              {                  errormessage += responseStr;              }                return  Int64.Parse(responseStr.Substring(4));          }            /// <summary>          /// 上傳指定的文件          /// </summary>          /// <param name="filename">要上傳的文件</param>          public  bool  OpenUpload( string  filename)          {              return  OpenUpload(filename, filename,  false );          }            /// <summary>          /// 上傳指定的文件          /// </summary>          /// <param name="filename">本地文件名</param>          /// <param name="remotefilename">遠程要覆蓋的文件名</param>          public  bool  OpenUpload( string  filename,  string  remotefilename)          {              return  OpenUpload(filename, remotefilename,  false );          }            /// <summary>          /// 上傳指定的文件          /// </summary>          /// <param name="filename">本地文件名</param>          /// <param name="resume">如果存在,則嘗試恢復</param>          public  bool  OpenUpload( string  filename,  bool  resume)          {              return  OpenUpload(filename, filename, resume);          }            /// <summary>          /// 上傳指定的文件          /// </summary>          /// <param name="filename">本地文件名</param>          /// <param name="remote_filename">遠程要覆蓋的文件名</param>          /// <param name="resume">如果存在,則嘗試恢復</param>          public  bool  OpenUpload( string  filename,  string  remote_filename,  bool  resume)          {              Connect();              SetBinaryMode( true );              OpenDataSocket();                bytes_total = 0;                try              {                  file =  new  FileStream(filename, FileMode.Open);              }              catch  (Exception ex)              {                  file =  null ;                  errormessage += ex.Message;                  return  false ;              }                file_size = file.Length;                if  (resume)              {                  long  size = GetFileSize(remote_filename);                  SendCommand( "REST "  + size);                  ReadResponse();                  if  (response == 350)                      file.Seek(size, SeekOrigin.Begin);              }                SendCommand( "STOR "  + remote_filename);              ReadResponse();                switch  (response)              {              case  125:              case  150:                  break ;              default :                  file.Close();                  file =  null ;                  errormessage += responseStr;                  return  false ;              }              ConnectDataSocket();                return  true ;          }            /// <summary>          /// 下載指定文件          /// </summary>          /// <param name="filename">遠程文件名稱</param>          public  void  OpenDownload( string  filename)          {              OpenDownload(filename, filename,  false );          }            /// <summary>          /// 下載並恢復指定文件          /// </summary>          /// <param name="filename">遠程文件名稱</param>          /// <param name="resume">如文件存在,則嘗試恢復</param>          public  void  OpenDownload( string  filename,  bool  resume)          {              OpenDownload(filename, filename, resume);          }            /// <summary>          /// 下載指定文件          /// </summary>          /// <param name="filename">遠程文件名稱</param>          /// <param name="localfilename">本地文件名</param>          public  void  OpenDownload( string  remote_filename,  string  localfilename)          {              OpenDownload(remote_filename, localfilename,  false );          }            /// <summary>          /// 打開並下載文件          /// </summary>          /// <param name="remote_filename">遠程文件名稱</param>          /// <param name="local_filename">本地文件名</param>          /// <param name="resume">如果文件存在則恢復</param>          public  void  OpenDownload( string  remote_filename,  string  local_filename,  bool  resume)          {              Connect();              SetBinaryMode( true );                bytes_total = 0;                try              {                  file_size = GetFileSize(remote_filename);              }              catch              {                  file_size = 0;              }                if  (resume && File.Exists(local_filename))              {                  try                  {                      file =  new  FileStream(local_filename, FileMode.Open);                  }                  catch  (Exception ex)                  {                      file =  null ;                      throw  new  Exception(ex.Message);                  }                    SendCommand( "REST "  + file.Length);                  ReadResponse();                  if  (response != 350)                      throw  new  Exception(responseStr);                  file.Seek(file.Length, SeekOrigin.Begin);                  bytes_total = file.Length;              }              else              {                  try                  {                      file =  new  FileStream(local_filename, FileMode.Create);                  }                  catch  (Exception ex)                  {                      file =  null ;                      throw  new  Exception(ex.Message);                  }              }                OpenDataSocket();              SendCommand( "RETR "  + remote_filename);              ReadResponse();                switch  (response)              {              case  125:              case  150:                  break ;              default :                  file.Close();                  file =  null ;                  errormessage += responseStr;                  return ;              }              ConnectDataSocket();                return ;          }            /// <summary>          /// 上傳文件(循環調用直到上傳完畢)          /// </summary>          /// <returns>發送的字節數</returns>          public  long  DoUpload()          {              Byte[] bytes =  new  Byte[512];              long  bytes_got;                try              {                  bytes_got = file.Read(bytes, 0, bytes.Length);                  bytes_total += bytes_got;                  data_sock.Send(bytes, ( int ) bytes_got, 0);                    if  (bytes_got <= 0)                  {                      //上傳完畢或有錯誤發生                      file.Close();                      file =  null ;                        CloseDataSocket();                      ReadResponse();                      switch  (response)                      {                      case  226:                      case  250:                          break ;                      default :  //當上傳中斷時                          {                              errormessage += responseStr;                              return  -1;                          }                      }                        SetBinaryMode( false );                  }              }              catch  (Exception ex)              {                  file.Close();                  file =  null ;                  CloseDataSocket();                  ReadResponse();                  SetBinaryMode( false );                  //throw ex;                  //當上傳中斷時                  errormessage += ex.Message;                  return  -1;              }                return  bytes_got;          }            /// <summary>          /// 下載文件(循環調用直到下載完畢)          /// </summary>          /// <returns>接收到的字節點</returns>          public  long  DoDownload()          {              Byte[] bytes =  new  Byte[512];              long  bytes_got;                try              {                  bytes_got = data_sock.Receive(bytes, bytes.Length, 0);                    if  (bytes_got <= 0)                  {                      //下載完畢或有錯誤發生                      CloseDataSocket();                      file.Close();                      file =  null ;                        ReadResponse();                      switch  (response)                      {                      case  226:                      case  250:                          break ;                      default :                          {                              errormessage += responseStr;                              return  -1;                          }                      }                        //SetBinaryMode(false);                      SetBinaryMode( true ); //業務需要，使用二進制模式下載                      return  bytes_got;                  }                    file.Write(bytes, 0, ( int ) bytes_got);                  bytes_total += bytes_got;              }              catch  (Exception ex)              {                  CloseDataSocket();                  file.Close();                  file =  null ;                  ReadResponse();                  SetBinaryMode( false );                  //throw ex;                  //當下載中斷時                  errormessage += ex.Message;                  return  -1;              }                return  bytes_got;          }            #endregion      } }

 使用例子：

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using  System; using  System.Collections; using  System.IO; using  Discuz.Common;   namespace  Test {      class  TestFtp      {          public  void  Test()          {              FTP ftp =  new  FTP( "127.0.0.1" ,  "abc" ,  "123456" );                //建立文件夾              ftp.MakeDir( "com" );              ftp.ChangeDir( "com" );              ftp.MakeDir( "mzwu" );              ftp.ChangeDir( "mzwu" );                //文件夾列表              ArrayList list = ftp.ListDirectories();              for  ( int  i = 0; i < list.Count; i++)              {                  Console.WriteLine(list[i].ToString() +  "<br/>" );              }                //刪除文件夾(不能直接刪除非空文件夾)              ftp.RemoveDir( "com\\mzwu" );                //上傳文件              ftp.Connect();              ftp.OpenUpload( @"F:\mzwucom.jpg" , Path.GetFileName( @"F:\mzwucom.jpg" ));              while  (ftp.DoUpload() > 0)              {                  int  perc = ( int ) (((ftp.BytesTotal) * 100) / ftp.FileSize);                  Console.WriteLine(perc.ToString() +  "%<br/>" );              }              ftp.Disconnect();                //下載文件              ftp.Connect();              ftp.OpenDownload( "mzwucom.jpg" ,  @"E:\mzwucom.jpg" );              while  (ftp.DoDownload() > 0)              {                  int  perc = ( int ) (((ftp.BytesTotal) * 100) / ftp.FileSize);                  Console.WriteLine(perc.ToString() +  "%<br/>" );              }              ftp.Disconnect();                //文件列表               list = ftp.ListFiles();              for  ( int  i = 0; i < list.Count; i++)              {                  Console.WriteLine(list[i].ToString() +  "<br/>" );              }                //文件重命名              ftp.RenameFile( "mzwucom.jpg" ,  "test.jpg" );                //刪除文件              ftp.RemoveFile( "test.jpg" );                //顯示錯誤信息              Console.WriteLine(ftp.errormessage);          }        } }

 

示例下載地址

SSL數據加密，需要發送命令如下

 

client.execPBSZ(0); client.execPROT("P");