cis/ReactOS.CustomRevisionAction/FtpClient.cs

   1 using System;
   2 using System.Net;
   3 using System.IO;
   4 using System.Text;
   5 using System.Net.Sockets;
   6 using System.Diagnostics;
   7 using System.Runtime.Remoting;
   8 using System.Runtime.Remoting.Messaging;
   9
  10 /*
  11  * FTP Client library in C#
  12  * Author: Jaimon Mathew
  13  * mailto:jaimonmathew@rediffmail.com
  14  * http://www.csharphelp.com/archives/archive9.html
  15  *
  16  * Addapted for use by Dan Glass 07/03/03
  17  */
  18
  19
  20 namespace ReactOS.CustomRevisionAction
  21 {
  22
  23         public class FtpClient
  24         {
  25
  26                 public class FtpException : Exception
  27                 {
  28                         public FtpException(string message) : base(message){}
  29                         public FtpException(string message, Exception innerException) : base(message,innerException){}
  30                 }
  31
  32                 private static int BUFFER_SIZE = 512;
  33                 private static Encoding ASCII = Encoding.ASCII;
  34
  35                 private bool verboseDebugging = false;
  36
  37                 // defaults
  38                 private string server = "localhost";
  39                 private string remotePath = ".";
  40                 private string username = "anonymous";
  41                 private string password = "anonymous@anonymous.net";
  42                 private string message = null;
  43                 private string result = null;
  44
  45                 private int port = 21;
  46                 private int bytes = 0;
  47                 private int resultCode = 0;
  48
  49                 private bool loggedin = false;
  50                 private bool binMode = false;
  51
  52                 private Byte[] buffer = new Byte[BUFFER_SIZE];
  53                 private Socket clientSocket = null;
  54
  55                 private int timeoutSeconds = 10;
  56
  57                 /// <summary>
  58                 /// Default contructor
  59                 /// </summary>
  60                 public FtpClient()
  61                 {
  62                 }
  63                 /// <summary>
  64                 ///
  65                 /// </summary>
  66                 /// <param name="server"></param>
  67                 /// <param name="username"></param>
  68                 /// <param name="password"></param>
  69                 public FtpClient(string server, string username, string password)
  70                 {
  71                         this.server = server;
  72                         this.username = username;
  73                         this.password = password;
  74                 }
  75                 /// <summary>
  76                 ///
  77                 /// </summary>
  78                 /// <param name="server"></param>
  79                 /// <param name="username"></param>
  80                 /// <param name="password"></param>
  81                 /// <param name="timeoutSeconds"></param>
  82                 /// <param name="port"></param>
  83                 public FtpClient(string server, string username, string password, int timeoutSeconds, int port)
  84                 {
  85                         this.server = server;
  86                         this.username = username;
  87                         this.password = password;
  88                         this.timeoutSeconds = timeoutSeconds;
  89                         this.port = port;
  90                 }
  91
  92                 /// <summary>
  93                 /// Display all communications to the debug log
  94                 /// </summary>
  95                 public bool VerboseDebugging
  96                 {
  97                         get
  98                         {
  99                                 return this.verboseDebugging;
 100                         }
 101                         set
 102                         {
 103                                 this.verboseDebugging = value;
 104                         }
 105                 }
 106                 /// <summary>
 107                 /// Remote server port. Typically TCP 21
 108                 /// </summary>
 109                 public int Port
 110                 {
 111                         get
 112                         {
 113                                 return this.port;
 114                         }
 115                         set
 116                         {
 117                                 this.port = value;
 118                         }
 119                 }
 120                 /// <summary>
 121                 /// Timeout waiting for a response from server, in seconds.
 122                 /// </summary>
 123                 public int Timeout
 124                 {
 125                         get
 126                         {
 127                                 return this.timeoutSeconds;
 128                         }
 129                         set
 130                         {
 131                                 this.timeoutSeconds = value;
 132                         }
 133                 }
 134                 /// <summary>
 135                 /// Gets and Sets the name of the FTP server.
 136                 /// </summary>
 137                 /// <returns></returns>
 138                 public string Server
 139                 {
 140                         get
 141                         {
 142                                 return this.server;
 143                         }
 144                         set
 145                         {
 146                                 this.server = value;
 147                         }
 148                 }
 149                 /// <summary>
 150                 /// Gets and Sets the port number.
 151                 /// </summary>
 152                 /// <returns></returns>
 153                 public int RemotePort
 154                 {
 155                         get
 156                         {
 157                                 return this.port;
 158                         }
 159                         set
 160                         {
 161                                 this.port = value;
 162                         }
 163                 }
 164                 /// <summary>
 165                 /// GetS and Sets the remote directory.
 166                 /// </summary>
 167                 public string RemotePath
 168                 {
 169                         get
 170                         {
 171                                 return this.remotePath;
 172                         }
 173                         set
 174                         {
 175                                 this.remotePath = value;
 176                         }
 177
 178                 }
 179                 /// <summary>
 180                 /// Gets and Sets the username.
 181                 /// </summary>
 182                 public string Username
 183                 {
 184                         get
 185                         {
 186                                 return this.username;
 187                         }
 188                         set
 189                         {
 190                                 this.username = value;
 191                         }
 192                 }
 193                 /// <summary>
 194                 /// Gets and Set the password.
 195                 /// </summary>
 196                 public string Password
 197                 {
 198                         get
 199                         {
 200                                 return this.password;
 201                         }
 202                         set
 203                         {
 204                                 this.password = value;
 205                         }
 206                 }
 207
 208                 /// <summary>
 209                 /// If the value of mode is true, set binary mode for downloads, else, Ascii mode.
 210                 /// </summary>
 211                 public bool BinaryMode
 212                 {
 213                         get
 214                         {
 215                                 return this.binMode;
 216                         }
 217                         set
 218                         {
 219                                 if ( this.binMode == value ) return;
 220
 221                                 if ( value )
 222                                         sendCommand("TYPE I");
 223
 224                                 else
 225                                         sendCommand("TYPE A");
 226
 227                                 if ( this.resultCode != 200 ) throw new FtpException(result.Substring(4));
 228                         }
 229                 }
 230                 /// <summary>
 231                 /// Login to the remote server.
 232                 /// </summary>
 233                 public void Login()
 234                 {
 235                         if ( this.loggedin ) this.Close();
 236
 237                         Debug.WriteLine("Opening connection to " + this.server, "FtpClient" );
 238
 239                         IPAddress addr = null;
 240                         IPEndPoint ep = null;
 241
 242                         try
 243                         {
 244                                 this.clientSocket = new Socket( AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
 245                                 addr = Dns.Resolve(this.server).AddressList[0];
 246                                 ep = new IPEndPoint( addr, this.port );
 247                                 this.clientSocket.Connect(ep);
 248                         }
 249                         catch(Exception ex)
 250                         {
 251                                 // doubtfull
 252                                 if ( this.clientSocket != null && this.clientSocket.Connected ) this.clientSocket.Close();
 253
 254                                 throw new FtpException("Couldn't connect to remote server",ex);
 255                         }
 256
 257                         this.readResponse();
 258
 259                         if(this.resultCode != 220)
 260                         {
 261                                 this.Close();
 262                                 throw new FtpException(this.result.Substring(4));
 263                         }
 264
 265                         this.sendCommand( "USER " + username );
 266
 267                         if( !(this.resultCode == 331 || this.resultCode == 230) )
 268                         {
 269                                 this.cleanup();
 270                                 throw new FtpException(this.result.Substring(4));
 271                         }
 272
 273                         if( this.resultCode != 230 )
 274                         {
 275                                 this.sendCommand( "PASS " + password );
 276
 277                                 if( !(this.resultCode == 230 || this.resultCode == 202) )
 278                                 {
 279                                         this.cleanup();
 280                                         throw new FtpException(this.result.Substring(4));
 281                                 }
 282                         }
 283
 284                         this.loggedin = true;
 285
 286                         Debug.WriteLine( "Connected to " + this.server, "FtpClient" );
 287
 288                         this.ChangeDir(this.remotePath);
 289                 }
 290
 291                 /// <summary>
 292                 /// Close the FTP connection.
 293                 /// </summary>
 294                 public void Close()
 295                 {
 296                         Debug.WriteLine("Closing connection to " + this.server, "FtpClient" );
 297
 298                         if( this.clientSocket != null )
 299                         {
 300                                 this.sendCommand("QUIT");
 301                         }
 302
 303                         this.cleanup();
 304                 }
 305
 306                 /// <summary>
 307                 /// Return a string array containing the remote directory's file list.
 308                 /// </summary>
 309                 /// <returns></returns>
 310                 public string[] GetFileList()
 311                 {
 312                         return this.GetFileList("*.*");
 313                 }
 314
 315                 /// <summary>
 316                 /// Return a string array containing the remote directory's file list.
 317                 /// </summary>
 318                 /// <param name="mask"></param>
 319                 /// <returns></returns>
 320                 public string[] GetFileList(string mask)
 321                 {
 322                         if ( !this.loggedin ) this.Login();
 323
 324                         Socket cSocket = createDataSocket();
 325
 326                         this.sendCommand("NLST " + mask);
 327
 328                         if(!(this.resultCode == 150 || this.resultCode == 125)) throw new FtpException(this.result.Substring(4));
 329
 330                         this.message = "";
 331
 332                         DateTime timeout = DateTime.Now.AddSeconds(this.timeoutSeconds);
 333
 334                         while( timeout > DateTime.Now )
 335                         {
 336                                 int bytes = cSocket.Receive(buffer, buffer.Length, 0);
 337                                 this.message += ASCII.GetString(buffer, 0, bytes);
 338
 339                                 if ( bytes < this.buffer.Length ) break;
 340                         }
 341
 342                         string[] msg = this.message.Replace("\r","").Split('\n');
 343
 344                         cSocket.Close();
 345
 346                         if ( this.message.IndexOf( "No such file or directory" ) != -1 )
 347                                 msg = new string[]{};
 348
 349                         this.readResponse();
 350
 351                         if ( this.resultCode != 226 )
 352                                 msg = new string[]{};
 353                         //      throw new FtpException(result.Substring(4));
 354
 355                         return msg;
 356                 }
 357
 358                 public bool DirectoryExists(string directory)
 359                 {
 360                         try
 361                         {
 362                                 ChangeDir(directory);
 363                                 ChangeDir("..");
 364                                 return true;
 365                         }
 366                         catch (FtpException)
 367                         {
 368                                 return false;
 369                         }
 370                 }
 371
 372                 /// <summary>
 373                 /// Return the size of a file.
 374                 /// </summary>
 375                 /// <param name="fileName"></param>
 376                 /// <returns></returns>
 377                 public long GetFileSize(string fileName)
 378                 {
 379                         if ( !this.loggedin ) this.Login();
 380
 381                         this.sendCommand("SIZE " + fileName);
 382                         long size=0;
 383
 384                         if ( this.resultCode == 213 )
 385                                 size = long.Parse(this.result.Substring(4));
 386
 387                         else
 388                                 throw new FtpException(this.result.Substring(4));
 389
 390                         return size;
 391                 }
 392
 393
 394                 /// <summary>
 395                 /// Download a file to the Assembly's local directory,
 396                 /// keeping the same file name.
 397                 /// </summary>
 398                 /// <param name="remFileName"></param>
 399                 public void Download(string remFileName)
 400                 {
 401                         this.Download(remFileName,"",false);
 402                 }
 403
 404                 /// <summary>
 405                 /// Download a remote file to the Assembly's local directory,
 406                 /// keeping the same file name, and set the resume flag.
 407                 /// </summary>
 408                 /// <param name="remFileName"></param>
 409                 /// <param name="resume"></param>
 410                 public void Download(string remFileName,Boolean resume)
 411                 {
 412                         this.Download(remFileName,"",resume);
 413                 }
 414
 415                 /// <summary>
 416                 /// Download a remote file to a local file name which can include
 417                 /// a path. The local file name will be created or overwritten,
 418                 /// but the path must exist.
 419                 /// </summary>
 420                 /// <param name="remFileName"></param>
 421                 /// <param name="locFileName"></param>
 422                 public void Download(string remFileName,string locFileName)
 423                 {
 424                         this.Download(remFileName,locFileName,false);
 425                 }
 426
 427                 /// <summary>
 428                 /// Download a remote file to a local file name which can include
 429                 /// a path, and set the resume flag. The local file name will be
 430                 /// created or overwritten, but the path must exist.
 431                 /// </summary>
 432                 /// <param name="remFileName"></param>
 433                 /// <param name="locFileName"></param>
 434                 /// <param name="resume"></param>
 435                 public void Download(string remFileName,string locFileName,Boolean resume)
 436                 {
 437                         if ( !this.loggedin ) this.Login();
 438
 439                         this.BinaryMode = true;
 440
 441                         Debug.WriteLine("Downloading file " + remFileName + " from " + server + "/" + remotePath, "FtpClient" );
 442
 443                         if (locFileName.Equals(""))
 444                         {
 445                                 locFileName = remFileName;
 446                         }
 447
 448                         FileStream output = null;
 449
 450                         if ( !File.Exists(locFileName) )
 451                                 output = File.Create(locFileName);
 452
 453                         else
 454                                 output = new FileStream(locFileName,FileMode.Open);
 455
 456                         Socket cSocket = createDataSocket();
 457
 458                         long offset = 0;
 459
 460                         if ( resume )
 461                         {
 462                                 offset = output.Length;
 463
 464                                 if ( offset > 0 )
 465                                 {
 466                                         this.sendCommand( "REST " + offset );
 467                                         if ( this.resultCode != 350 )
 468                                         {
 469                                                 //Server dosnt support resuming
 470                                                 offset = 0;
 471                                                 Debug.WriteLine("Resuming not supported:" + result.Substring(4), "FtpClient" );
 472                                         }
 473                                         else
 474                                         {
 475                                                 Debug.WriteLine("Resuming at offset " + offset, "FtpClient" );
 476                                                 output.Seek( offset, SeekOrigin.Begin );
 477                                         }
 478                                 }
 479                         }
 480
 481                         this.sendCommand("RETR " + remFileName);
 482
 483                         if ( this.resultCode != 150 && this.resultCode != 125 )
 484                         {
 485                                 throw new FtpException(this.result.Substring(4));
 486                         }
 487
 488                         DateTime timeout = DateTime.Now.AddSeconds(this.timeoutSeconds);
 489
 490                         while ( timeout > DateTime.Now )
 491                         {
 492                                 this.bytes = cSocket.Receive(buffer, buffer.Length, 0);
 493                                 output.Write(this.buffer,0,this.bytes);
 494
 495                                 if ( this.bytes <= 0)
 496                                 {
 497                                         break;
 498                                 }
 499                         }
 500
 501                         output.Close();
 502
 503                         if ( cSocket.Connected ) cSocket.Close();
 504
 505                         this.readResponse();
 506
 507                         if( this.resultCode != 226 && this.resultCode != 250 )
 508                                 throw new FtpException(this.result.Substring(4));
 509                 }
 510
 511
 512                 /// <summary>
 513                 /// Upload a file.
 514                 /// </summary>
 515                 /// <param name="fileName"></param>
 516                 public void Upload(string fileName)
 517                 {
 518                         this.Upload(fileName,false);
 519                 }
 520
 521
 522                 /// <summary>
 523                 /// Upload a file and set the resume flag.
 524                 /// </summary>
 525                 /// <param name="fileName"></param>
 526                 /// <param name="resume"></param>
 527                 public void Upload(string fileName, bool resume)
 528                 {
 529                         if ( !this.loggedin ) this.Login();
 530
 531                         Socket cSocket = null ;
 532                         long offset = 0;
 533
 534                         if ( resume )
 535                         {
 536                                 try
 537                                 {
 538                                         this.BinaryMode = true;
 539
 540                                         offset = GetFileSize( Path.GetFileName(fileName) );
 541                                 }
 542                                 catch(Exception)
 543                                 {
 544                                         // file not exist
 545                                         offset = 0;
 546                                 }
 547                         }
 548
 549                         // open stream to read file
 550                         FileStream input = new FileStream(fileName,FileMode.Open);
 551
 552                         if ( resume && input.Length < offset )
 553                         {
 554                                 // different file size
 555                                 Debug.WriteLine("Overwriting " + fileName, "FtpClient");
 556                                 offset = 0;
 557                         }
 558                         else if ( resume && input.Length == offset )
 559                         {
 560                                 // file done
 561                                 input.Close();
 562                                 Debug.WriteLine("Skipping completed " + fileName + " - turn resume off to not detect.", "FtpClient");
 563                                 return;
 564                         }
 565
 566                         // dont create untill we know that we need it
 567                         cSocket = this.createDataSocket();
 568
 569                         if ( offset > 0 )
 570                         {
 571                                 this.sendCommand( "REST " + offset );
 572                                 if ( this.resultCode != 350 )
 573                                 {
 574                                         Debug.WriteLine("Resuming not supported", "FtpClient");
 575                                         offset = 0;
 576                                 }
 577                         }
 578
 579                         this.sendCommand( "STOR " + Path.GetFileName(fileName) );
 580
 581                         if ( this.resultCode != 125 && this.resultCode != 150 ) throw new FtpException(result.Substring(4));
 582
 583                         if ( offset != 0 )
 584                         {
 585                                 Debug.WriteLine("Resuming at offset " + offset, "FtpClient" );
 586
 587                                 input.Seek(offset,SeekOrigin.Begin);
 588                         }
 589
 590                         Debug.WriteLine( "Uploading file " + fileName + " to " + remotePath, "FtpClient" );
 591
 592                         while ((bytes = input.Read(buffer,0,buffer.Length)) > 0)
 593                         {
 594                                 cSocket.Send(buffer, bytes, 0);
 595                         }
 596
 597                         input.Close();
 598
 599                         if (cSocket.Connected)
 600                         {
 601                                 cSocket.Close();
 602                         }
 603
 604                         this.readResponse();
 605
 606                         if( this.resultCode != 226 && this.resultCode != 250 ) throw new FtpException(this.result.Substring(4));
 607                 }
 608
 609                 /// <summary>
 610                 /// Upload a directory and its file contents
 611                 /// </summary>
 612                 /// <param name="path"></param>
 613                 /// <param name="recurse">Whether to recurse sub directories</param>
 614                 public void UploadDirectory(string path, bool recurse)
 615                 {
 616                         this.UploadDirectory(path,recurse,"*.*");
 617                 }
 618
 619                 /// <summary>
 620                 /// Upload a directory and its file contents
 621                 /// </summary>
 622                 /// <param name="path"></param>
 623                 /// <param name="recurse">Whether to recurse sub directories</param>
 624                 /// <param name="mask">Only upload files of the given mask - everything is '*.*'</param>
 625                 public void UploadDirectory(string path, bool recurse, string mask)
 626                 {
 627                         string[] dirs = path.Replace("/",@"\").Split('\\');
 628                         string rootDir = dirs[ dirs.Length - 1 ];
 629
 630                         // make the root dir if it doed not exist
 631                         if ( this.GetFileList(rootDir).Length < 1 ) this.MakeDir(rootDir);
 632
 633                         this.ChangeDir(rootDir);
 634
 635                         foreach ( string file in Directory.GetFiles(path,mask) )
 636                         {
 637                                 this.Upload(file,true);
 638                         }
 639                         if ( recurse )
 640                         {
 641                                 foreach ( string directory in Directory.GetDirectories(path) )
 642                                 {
 643                                         this.UploadDirectory(directory,recurse,mask);
 644                                 }
 645                         }
 646
 647                         this.ChangeDir("..");
 648                 }
 649
 650                 /// <summary>
 651                 /// Delete a file from the remote FTP server.
 652                 /// </summary>
 653                 /// <param name="fileName"></param>
 654                 public void DeleteFile(string fileName)
 655                 {
 656                         if ( !this.loggedin ) this.Login();
 657
 658                         this.sendCommand( "DELE " + fileName );
 659
 660                         if ( this.resultCode != 250 ) throw new FtpException(this.result.Substring(4));
 661
 662                         Debug.WriteLine( "Deleted file " + fileName, "FtpClient" );
 663                 }
 664
 665                 /// <summary>
 666                 /// Rename a file on the remote FTP server.
 667                 /// </summary>
 668                 /// <param name="oldFileName"></param>
 669                 /// <param name="newFileName"></param>
 670                 /// <param name="overwrite">setting to false will throw exception if it exists</param>
 671                 public void RenameFile(string oldFileName,string newFileName, bool overwrite)
 672                 {
 673                         if ( !this.loggedin ) this.Login();
 674
 675                         this.sendCommand( "RNFR " + oldFileName );
 676
 677                         if ( this.resultCode != 350 ) throw new FtpException(this.result.Substring(4));
 678
 679                         if ( !overwrite && this.GetFileList(newFileName).Length > 0 ) throw new FtpException("File already exists");
 680
 681                         this.sendCommand( "RNTO " + newFileName );
 682
 683                         if ( this.resultCode != 250 ) throw new FtpException(this.result.Substring(4));
 684
 685                         Debug.WriteLine( "Renamed file " + oldFileName + " to " + newFileName, "FtpClient" );
 686                 }
 687
 688                 /// <summary>
 689                 /// Create a directory on the remote FTP server.
 690                 /// </summary>
 691                 /// <param name="dirName"></param>
 692                 public void MakeDir(string dirName)
 693                 {
 694                         if ( !this.loggedin ) this.Login();
 695
 696                         this.sendCommand( "MKD " + dirName );
 697
 698                         if ( this.resultCode != 250 && this.resultCode != 257 ) throw new FtpException(this.result.Substring(4));
 699
 700                         Debug.WriteLine( "Created directory " + dirName, "FtpClient" );
 701                 }
 702
 703                 /// <summary>
 704                 /// Delete a directory on the remote FTP server.
 705                 /// </summary>
 706                 /// <param name="dirName"></param>
 707                 public void RemoveDir(string dirName)
 708                 {
 709                         if ( !this.loggedin ) this.Login();
 710
 711                         this.sendCommand( "RMD " + dirName );
 712
 713                         if ( this.resultCode != 250 ) throw new FtpException(this.result.Substring(4));
 714
 715                         Debug.WriteLine( "Removed directory " + dirName, "FtpClient" );
 716                 }
 717
 718                 /// <summary>
 719                 /// Change the current working directory on the remote FTP server.
 720                 /// </summary>
 721                 /// <param name="dirName"></param>
 722                 public void ChangeDir(string dirName)
 723                 {
 724                         if( dirName == null || dirName.Equals(".") || dirName.Length == 0 )
 725                         {
 726                                 return;
 727                         }
 728
 729                         if ( !this.loggedin ) this.Login();
 730
 731                         this.sendCommand( "CWD " + dirName );
 732
 733                         if ( this.resultCode != 250 )
 734                         {
 735                                 if (this.resultCode == 550)
 736                                         throw new FtpException(String.Format("Access denied to {0}", this.remotePath + "/" + dirName));
 737                                 throw new FtpException(result.Substring(4));
 738                         }
 739
 740                         this.sendCommand( "PWD" );
 741
 742                         if ( this.resultCode != 257 ) throw new FtpException(result.Substring(4));
 743
 744                         // gonna have to do better than this....
 745                         this.remotePath = this.message.Split('"')[1];
 746
 747                         Debug.WriteLine( "Current directory is " + this.remotePath, "FtpClient" );
 748                 }
 749
 750                 /// <summary>
 751                 ///
 752                 /// </summary>
 753                 private void readResponse()
 754                 {
 755                         this.message = "";
 756                         this.result = this.readLine();
 757
 758                         if ( this.result.Length > 3 )
 759                                 this.resultCode = int.Parse( this.result.Substring(0,3) );
 760                         else
 761                                 this.result = null;
 762                 }
 763
 764                 /// <summary>
 765                 ///
 766                 /// </summary>
 767                 /// <returns></returns>
 768                 private string readLine()
 769                 {
 770                         while(true)
 771                         {
 772                                 this.bytes = clientSocket.Receive( this.buffer, this.buffer.Length, 0 );
 773                                 this.message += ASCII.GetString( this.buffer, 0, this.bytes );
 774
 775                                 if ( this.bytes < this.buffer.Length )
 776                                 {
 777                                         break;
 778                                 }
 779                         }
 780
 781                         string[] msg = this.message.Split('\n');
 782
 783                         if ( this.message.Length > 2 )
 784                                 this.message = msg[ msg.Length - 2 ];
 785
 786                         else
 787                                 this.message = msg[0];
 788
 789
 790                         if ( this.message.Length > 4 && !this.message.Substring(3,1).Equals(" ") ) return this.readLine();
 791
 792                         if ( this.verboseDebugging )
 793                         {
 794                                 for(int i = 0; i < msg.Length - 1; i++)
 795                                 {
 796                                         Debug.Write( msg[i], "FtpClient" );
 797                                 }
 798                         }
 799
 800                         return message;
 801                 }
 802
 803                 /// <summary>
 804                 ///
 805                 /// </summary>
 806                 /// <param name="command"></param>
 807                 private void sendCommand(String command)
 808                 {
 809                         if ( this.verboseDebugging ) Debug.WriteLine(command,"FtpClient");
 810
 811                         Byte[] cmdBytes = Encoding.ASCII.GetBytes( ( command + "\r\n" ).ToCharArray() );
 812                         clientSocket.Send( cmdBytes, cmdBytes.Length, 0);
 813                         this.readResponse();
 814                 }
 815
 816                 /// <summary>
 817                 /// when doing data transfers, we need to open another socket for it.
 818                 /// </summary>
 819                 /// <returns>Connected socket</returns>
 820                 private Socket createDataSocket()
 821                 {
 822                         this.sendCommand("PASV");
 823
 824                         if ( this.resultCode != 227 ) throw new FtpException(this.result.Substring(4));
 825
 826                         int index1 = this.result.IndexOf('(');
 827                         int index2 = this.result.IndexOf(')');
 828
 829                         string ipData = this.result.Substring(index1+1,index2-index1-1);
 830
 831                         int[] parts = new int[6];
 832
 833                         int len = ipData.Length;
 834                         int partCount = 0;
 835                         string buf="";
 836
 837                         for (int i = 0; i < len && partCount <= 6; i++)
 838                         {
 839                                 char ch = char.Parse( ipData.Substring(i,1) );
 840
 841                                 if ( char.IsDigit(ch) )
 842                                         buf+=ch;
 843
 844                                 else if (ch != ',')
 845                                         throw new FtpException("Malformed PASV result: " + result);
 846
 847                                 if ( ch == ',' || i+1 == len )
 848                                 {
 849                                         try
 850                                         {
 851                                                 parts[partCount++] = int.Parse(buf);
 852                                                 buf = "";
 853                                         }
 854                                         catch (Exception ex)
 855                                         {
 856                                                 throw new FtpException("Malformed PASV result (not supported?): " + this.result, ex);
 857                                         }
 858                                 }
 859                         }
 860
 861                         string ipAddress = parts[0] + "."+ parts[1]+ "." + parts[2] + "." + parts[3];
 862
 863                         int port = (parts[4] << 8) + parts[5];
 864
 865                         Socket socket = null;
 866                         IPEndPoint ep = null;
 867
 868                         try
 869                         {
 870                                 socket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
 871                                 ep = new IPEndPoint(Dns.Resolve(ipAddress).AddressList[0], port);
 872                                 socket.Connect(ep);
 873                         }
 874                         catch(Exception ex)
 875                         {
 876                                 // doubtfull....
 877                                 if ( socket != null && socket.Connected ) socket.Close();
 878
 879                                 throw new FtpException("Can't connect to remote server", ex);
 880                         }
 881
 882                         return socket;
 883                 }
 884
 885                 /// <summary>
 886                 /// Always release those sockets.
 887                 /// </summary>
 888                 private void cleanup()
 889                 {
 890                         if ( this.clientSocket!=null )
 891                         {
 892                                 this.clientSocket.Close();
 893                                 this.clientSocket = null;
 894                         }
 895                         this.loggedin = false;
 896                 }
 897
 898                 /// <summary>
 899                 /// Destuctor
 900                 /// </summary>
 901                 ~FtpClient()
 902                 {
 903                         this.cleanup();
 904                 }
 905
 906
 907                 /**************************************************************************************************************/
 908                 #region Async methods (auto generated)
 909
 910 /*
 911                                 WinInetApi.FtpClient ftp = new WinInetApi.FtpClient();
 912
 913                                 MethodInfo[] methods = ftp.GetType().GetMethods(BindingFlags.DeclaredOnly|BindingFlags.Instance|BindingFlags.Public);
 914
 915                                 foreach ( MethodInfo method in methods )
 916                                 {
 917                                         string param = "";
 918                                         string values = "";
 919                                         foreach ( ParameterInfo i in  method.GetParameters() )
 920                                         {
 921                                                 param += i.ParameterType.Name + " " + i.Name + ",";
 922                                                 values += i.Name + ",";
 923                                         }
 924
 925
 926                                         Debug.WriteLine("private delegate " + method.ReturnType.Name + " " + method.Name + "Callback(" + param.TrimEnd(',') + ");");
 927
 928                                         Debug.WriteLine("public System.IAsyncResult Begin" + method.Name + "( " + param + " System.AsyncCallback callback )");
 929                                         Debug.WriteLine("{");
 930                                         Debug.WriteLine("" + method.Name + "Callback ftpCallback = new " + method.Name + "Callback(" + values + " this." + method.Name + ");");
 931                                         Debug.WriteLine("return ftpCallback.BeginInvoke(callback, null);");
 932                                         Debug.WriteLine("}");
 933                                         Debug.WriteLine("public void End" + method.Name + "(System.IAsyncResult asyncResult)");
 934                                         Debug.WriteLine("{");
 935                                         Debug.WriteLine(method.Name + "Callback fc = (" + method.Name + "Callback) ((AsyncResult)asyncResult).AsyncDelegate;");
 936                                         Debug.WriteLine("fc.EndInvoke(asyncResult);");
 937                                         Debug.WriteLine("}");
 938                                         //Debug.WriteLine(method);
 939                                 }
 940 */
 941
 942
 943                 private delegate void LoginCallback();
 944                 public System.IAsyncResult BeginLogin(  System.AsyncCallback callback )
 945                 {
 946                         LoginCallback ftpCallback = new LoginCallback( this.Login);
 947                         return ftpCallback.BeginInvoke(callback, null);
 948                 }
 949                 private delegate void CloseCallback();
 950                 public System.IAsyncResult BeginClose(  System.AsyncCallback callback )
 951                 {
 952                         CloseCallback ftpCallback = new CloseCallback( this.Close);
 953                         return ftpCallback.BeginInvoke(callback, null);
 954                 }
 955                 private delegate String[] GetFileListCallback();
 956                 public System.IAsyncResult BeginGetFileList(  System.AsyncCallback callback )
 957                 {
 958                         GetFileListCallback ftpCallback = new GetFileListCallback( this.GetFileList);
 959                         return ftpCallback.BeginInvoke(callback, null);
 960                 }
 961                 private delegate String[] GetFileListMaskCallback(String mask);
 962                 public System.IAsyncResult BeginGetFileList( String mask, System.AsyncCallback callback )
 963                 {
 964                         GetFileListMaskCallback ftpCallback = new GetFileListMaskCallback(this.GetFileList);
 965                         return ftpCallback.BeginInvoke(mask, callback, null);
 966                 }
 967                 private delegate Int64 GetFileSizeCallback(String fileName);
 968                 public System.IAsyncResult BeginGetFileSize( String fileName, System.AsyncCallback callback )
 969                 {
 970                         GetFileSizeCallback ftpCallback = new GetFileSizeCallback(this.GetFileSize);
 971                         return ftpCallback.BeginInvoke(fileName, callback, null);
 972                 }
 973                 private delegate void DownloadCallback(String remFileName);
 974                 public System.IAsyncResult BeginDownload( String remFileName, System.AsyncCallback callback )
 975                 {
 976                         DownloadCallback ftpCallback = new DownloadCallback(this.Download);
 977                         return ftpCallback.BeginInvoke(remFileName, callback, null);
 978                 }
 979                 private delegate void DownloadFileNameResumeCallback(String remFileName,Boolean resume);
 980                 public System.IAsyncResult BeginDownload( String remFileName,Boolean resume, System.AsyncCallback callback )
 981                 {
 982                         DownloadFileNameResumeCallback ftpCallback = new DownloadFileNameResumeCallback(this.Download);
 983                         return ftpCallback.BeginInvoke(remFileName, resume, callback, null);
 984                 }
 985                 private delegate void DownloadFileNameFileNameCallback(String remFileName,String locFileName);
 986                 public System.IAsyncResult BeginDownload( String remFileName,String locFileName, System.AsyncCallback callback )
 987                 {
 988                         DownloadFileNameFileNameCallback ftpCallback = new DownloadFileNameFileNameCallback(this.Download);
 989                         return ftpCallback.BeginInvoke(remFileName, locFileName, callback, null);
 990                 }
 991                 private delegate void DownloadFileNameFileNameResumeCallback(String remFileName,String locFileName,Boolean resume);
 992                 public System.IAsyncResult BeginDownload( String remFileName,String locFileName,Boolean resume, System.AsyncCallback callback )
 993                 {
 994                         DownloadFileNameFileNameResumeCallback ftpCallback = new DownloadFileNameFileNameResumeCallback(this.Download);
 995                         return ftpCallback.BeginInvoke(remFileName, locFileName, resume, callback, null);
 996                 }
 997                 private delegate void UploadCallback(String fileName);
 998                 public System.IAsyncResult BeginUpload( String fileName, System.AsyncCallback callback )
 999                 {
1000                         UploadCallback ftpCallback = new UploadCallback(this.Upload);
1001                         return ftpCallback.BeginInvoke(fileName, callback, null);
1002                 }
1003                 private delegate void UploadFileNameResumeCallback(String fileName,Boolean resume);
1004                 public System.IAsyncResult BeginUpload( String fileName,Boolean resume, System.AsyncCallback callback )
1005                 {
1006                         UploadFileNameResumeCallback ftpCallback = new UploadFileNameResumeCallback(this.Upload);
1007                         return ftpCallback.BeginInvoke(fileName, resume, callback, null);
1008                 }
1009                 private delegate void UploadDirectoryCallback(String path,Boolean recurse);
1010                 public System.IAsyncResult BeginUploadDirectory( String path,Boolean recurse, System.AsyncCallback callback )
1011                 {
1012                         UploadDirectoryCallback ftpCallback = new UploadDirectoryCallback(this.UploadDirectory);
1013                         return ftpCallback.BeginInvoke(path, recurse, callback, null);
1014                 }
1015                 private delegate void UploadDirectoryPathRecurseMaskCallback(String path,Boolean recurse,String mask);
1016                 public System.IAsyncResult BeginUploadDirectory( String path,Boolean recurse,String mask, System.AsyncCallback callback )
1017                 {
1018                         UploadDirectoryPathRecurseMaskCallback ftpCallback = new UploadDirectoryPathRecurseMaskCallback(this.UploadDirectory);
1019                         return ftpCallback.BeginInvoke(path, recurse, mask, callback, null);
1020                 }
1021                 private delegate void DeleteFileCallback(String fileName);
1022                 public System.IAsyncResult BeginDeleteFile( String fileName, System.AsyncCallback callback )
1023                 {
1024                         DeleteFileCallback ftpCallback = new DeleteFileCallback(this.DeleteFile);
1025                         return ftpCallback.BeginInvoke(fileName, callback, null);
1026                 }
1027                 private delegate void RenameFileCallback(String oldFileName,String newFileName,Boolean overwrite);
1028                 public System.IAsyncResult BeginRenameFile( String oldFileName,String newFileName,Boolean overwrite, System.AsyncCallback callback )
1029                 {
1030                         RenameFileCallback ftpCallback = new RenameFileCallback(this.RenameFile);
1031                         return ftpCallback.BeginInvoke(oldFileName, newFileName, overwrite, callback, null);
1032                 }
1033                 private delegate void MakeDirCallback(String dirName);
1034                 public System.IAsyncResult BeginMakeDir( String dirName, System.AsyncCallback callback )
1035                 {
1036                         MakeDirCallback ftpCallback = new MakeDirCallback(this.MakeDir);
1037                         return ftpCallback.BeginInvoke(dirName, callback, null);
1038                 }
1039                 private delegate void RemoveDirCallback(String dirName);
1040                 public System.IAsyncResult BeginRemoveDir( String dirName, System.AsyncCallback callback )
1041                 {
1042                         RemoveDirCallback ftpCallback = new RemoveDirCallback(this.RemoveDir);
1043                         return ftpCallback.BeginInvoke(dirName, callback, null);
1044                 }
1045                 private delegate void ChangeDirCallback(String dirName);
1046                 public System.IAsyncResult BeginChangeDir( String dirName, System.AsyncCallback callback )
1047                 {
1048                         ChangeDirCallback ftpCallback = new ChangeDirCallback(this.ChangeDir);
1049                         return ftpCallback.BeginInvoke(dirName, callback, null);
1050                 }
1051
1052                 #endregion
1053         }
1054 }