mcs/class/System/Test/System.Net/FtpWebRequestTest.cs

   1 //
   2 // FtpWebRequestTest.cs - NUnit Test Cases for System.Net.FtpWebRequest
   3 //
   4 // Authors:
   5 //      Carlos Alberto Cortez <calberto.cortez@gmail.com>
   6 //      Gonzalo Paniagua Javier <gonzalo@novell.com>
   7 //
   8 // Copyright (c) 2006,2007,2008 Novell, Inc. (http://www.novell.com)
   9 //
  10 using NUnit.Framework;
  11 using System;
  12 using System.Collections.Generic;
  13 using System.IO;
  14 using System.Net;
  15 using System.Net.Sockets;
  16 using System.Text;
  17 using System.Threading;
  18
  19 namespace MonoTests.System.Net
  20 {
  21         [TestFixture]
  22         public class FtpWebRequestTest
  23         {
  24                 FtpWebRequest _defaultRequest;
  25                 FtpWebRequest defaultRequest {
  26                         get { return _defaultRequest ?? (_defaultRequest = (FtpWebRequest) WebRequest.Create ("ftp://www.contoso.com")); }
  27                 }
  28
  29                 private string _tempDirectory;
  30                 private string _tempFile;
  31
  32                 [SetUp]
  33                 public void SetUp ()
  34                 {
  35                         _tempDirectory = Path.Combine (Path.GetTempPath (), "MonoTests.System.Net.FileWebRequestTest");
  36                         _tempFile = Path.Combine (_tempDirectory, "FtpWebRequestTest.tmp");
  37                         if (!Directory.Exists (_tempDirectory)) {
  38                                 Directory.CreateDirectory (_tempDirectory);
  39                         } else {
  40                                 // ensure no files are left over from previous runs
  41                                 string [] files = Directory.GetFiles (_tempDirectory, "*");
  42                                 foreach (string file in files)
  43                                         File.Delete (file);
  44                         }
  45                 }
  46
  47                 [TearDown]
  48                 public void TearDown ()
  49                 {
  50                         if (Directory.Exists (_tempDirectory))
  51                                 Directory.Delete (_tempDirectory, true);
  52                 }
  53
  54                 [Test]
  55                 public void ContentLength ()
  56                 {
  57                         try {
  58                                 long l = defaultRequest.ContentLength;
  59 #if FEATURE_NO_BSD_SOCKETS
  60                                 Assert.Fail ("#1a");
  61                         } catch (PlatformNotSupportedException) {
  62                                 // OK.
  63 #else
  64                         } catch (NotSupportedException) {
  65                                 Assert.Fail ("#1"); // Not overriden
  66 #endif
  67                         }
  68
  69                         try {
  70                                 defaultRequest.ContentLength = 2;
  71 #if FEATURE_NO_BSD_SOCKETS
  72                                 Assert.Fail ("#2a");
  73                         } catch (PlatformNotSupportedException) {
  74                                 // OK.
  75 #else
  76                         } catch (NotSupportedException) {
  77                                 Assert.Fail ("#2"); // Not overriden
  78 #endif
  79                         }
  80                 }
  81
  82                 [Test]
  83                 public void ContentType ()
  84                 {
  85                         try {
  86                                 string t = defaultRequest.ContentType;
  87                                 Assert.Fail ("#1");
  88                         } catch (NotSupportedException) {
  89                         }
  90
  91                         try {
  92                                 defaultRequest.ContentType = String.Empty;
  93                                 Assert.Fail ("#2");
  94                         } catch (NotSupportedException) {
  95                         }
  96                 }
  97
  98                 [Test]
  99 #if FEATURE_NO_BSD_SOCKETS
 100                 [ExpectedException (typeof (PlatformNotSupportedException))]
 101 #endif
 102                 public void ContentOffset ()
 103                 {
 104                         try {
 105                                 defaultRequest.ContentOffset = -2;
 106                                 Assert.Fail ("#1");
 107                         } catch (ArgumentOutOfRangeException) {
 108                         }
 109                 }
 110
 111                 [Test]
 112 #if FEATURE_NO_BSD_SOCKETS
 113                 [ExpectedException (typeof (PlatformNotSupportedException))]
 114 #endif
 115                 public void Credentials ()
 116                 {
 117                         try {
 118                                 defaultRequest.Credentials = null;
 119                                 Assert.Fail ("#1");
 120                         } catch (ArgumentNullException) {
 121                         }
 122
 123                 }
 124
 125                 [Test]
 126 #if FEATURE_NO_BSD_SOCKETS
 127                 [ExpectedException (typeof (PlatformNotSupportedException))]
 128 #endif
 129                 public void Method ()
 130                 {
 131                         try {
 132                                 defaultRequest.Method = null;
 133                                 Assert.Fail ("#1");
 134                         } catch (ArgumentNullException) {
 135                         }
 136
 137                         try {
 138                                 defaultRequest.Method = String.Empty;
 139                                 Assert.Fail ("#2");
 140                         } catch (ArgumentException) {
 141                         }
 142
 143                         try {
 144                                 defaultRequest.Method = "WrongValue";
 145                                 Assert.Fail ("#3");
 146                         } catch (ArgumentException) {
 147                         }
 148                 }
 149
 150                 [Test]
 151                 public void PreAuthenticate ()
 152                 {
 153                         try {
 154                                 bool p = defaultRequest.PreAuthenticate;
 155                                 Assert.Fail ("#1");
 156                         } catch (NotSupportedException) {
 157                         }
 158
 159                         try {
 160                                 defaultRequest.PreAuthenticate = true;
 161                         } catch (NotSupportedException) {
 162                         }
 163                 }
 164
 165                 [Test]
 166 #if FEATURE_NO_BSD_SOCKETS
 167                 [ExpectedException (typeof (PlatformNotSupportedException))]
 168 #endif
 169                 public void ReadWriteTimeout ()
 170                 {
 171                         try {
 172                                 defaultRequest.ReadWriteTimeout = -2;
 173                                 Assert.Fail ("#2");
 174                         } catch (ArgumentOutOfRangeException) {
 175                         }
 176                 }
 177
 178                 [Test]
 179 #if FEATURE_NO_BSD_SOCKETS
 180                 [ExpectedException (typeof (PlatformNotSupportedException))]
 181 #endif
 182                 public void Timeout ()
 183                 {
 184                         try {
 185                                 defaultRequest.Timeout = -2;
 186                                 Assert.Fail ("#2");
 187                         } catch (ArgumentOutOfRangeException) {
 188                         }
 189                 }
 190
 191                 [Test]
 192 #if FEATURE_NO_BSD_SOCKETS
 193                 [ExpectedException (typeof (PlatformNotSupportedException))]
 194 #endif
 195                 public void DefaultValues ()
 196                 {
 197                         FtpWebRequest request = (FtpWebRequest) WebRequest.Create ("ftp://www.contoso.com");
 198
 199                         Assert.AreEqual (0, request.ContentOffset, "ContentOffset");
 200                         Assert.AreEqual (false, request.EnableSsl, "EnableSsl");
 201                         // FIXME: Disabled this one by now. KeepAlive is not well supported.
 202                         // Assert.AreEqual (true, request.KeepAlive, "KeepAlive");
 203                         Assert.AreEqual (WebRequestMethods.Ftp.DownloadFile, request.Method, "#1");
 204                         Assert.AreEqual (300000, request.ReadWriteTimeout, "ReadWriteTimeout");
 205                         Assert.IsNull (request.RenameTo, "RenameTo");
 206                         Assert.AreEqual (true, request.UseBinary, "UseBinary");
 207                         Assert.AreEqual (100000, request.Timeout, "Timeout");
 208                         Assert.AreEqual (true, request.UsePassive, "UsePassive");
 209                 }
 210
 211                 [Test]
 212 #if FEATURE_NO_BSD_SOCKETS
 213                 [ExpectedException (typeof (PlatformNotSupportedException))]
 214 #endif
 215                 public void RenameTo ()
 216                 {
 217                         try {
 218                                 defaultRequest.RenameTo = null;
 219                                 Assert.Fail ("#1");
 220                         } catch (ArgumentException) {
 221                         }
 222
 223                         try {
 224                                 defaultRequest.RenameTo = String.Empty;
 225                                 Assert.Fail ("#2");
 226                         } catch (ArgumentException) {
 227                         }
 228                 }
 229
 230                 [Test]
 231 #if FEATURE_NO_BSD_SOCKETS
 232                 [ExpectedException (typeof (PlatformNotSupportedException))]
 233 #endif
 234                 public void UploadFile1_v4 ()
 235                 {
 236                         UploadFile1 (false);
 237                 }
 238
 239                 [Test]
 240 #if FEATURE_NO_BSD_SOCKETS
 241                 [ExpectedException (typeof (PlatformNotSupportedException))]
 242 #endif
 243                 public void UploadFile1_v6 ()
 244                 {
 245                         if (!Socket.OSSupportsIPv6)
 246                                 Assert.Ignore ("IPv6 not supported.");
 247
 248                         UploadFile1 (true);
 249                 }
 250
 251                 void UploadFile1 (bool ipv6)
 252                 {
 253                         ServerPut sp = new ServerPut (ipv6);
 254                         sp.Start ();
 255                         string uri = String.Format ("ftp://{0}:{1}/uploads/file.txt", EncloseIPv6 (sp.IPAddress), sp.Port);
 256                         try {
 257                                 FtpWebRequest ftp = (FtpWebRequest) WebRequest.Create (uri);
 258                                 ftp.KeepAlive = false;
 259                                 ftp.Timeout = 5000;
 260                                 ftp.Method = WebRequestMethods.Ftp.UploadFile;
 261                                 ftp.ContentLength = 10;
 262                                 ftp.UseBinary = true;
 263                                 Stream stream = ftp.GetRequestStream ();
 264                                 for (int i = 0; i < 10; i++)
 265                                         stream.WriteByte ((byte)i);
 266                                 stream.Close ();
 267                                 FtpWebResponse response = (FtpWebResponse) ftp.GetResponse ();
 268                                 Assert.IsTrue ((int) response.StatusCode >= 200 && (int) response.StatusCode < 300, "UP#01");
 269                                 Assert.AreEqual (10, sp.result.Count, "UP#02");
 270                                 response.Close ();
 271                         } catch (Exception) {
 272                                 if (!String.IsNullOrEmpty (sp.Where))
 273                                         throw new Exception (sp.Where);
 274                                 throw;
 275                         } finally {
 276                                 sp.Stop ();
 277                         }
 278                 }
 279
 280                 [Test]
 281 #if FEATURE_NO_BSD_SOCKETS
 282                 [ExpectedException (typeof (PlatformNotSupportedException))]
 283 #endif
 284                 public void UploadFile_WebClient_v4 ()
 285                 {
 286                         UploadFile_WebClient (false);
 287                 }
 288
 289                 [Test]
 290 #if FEATURE_NO_BSD_SOCKETS
 291                 [ExpectedException (typeof (PlatformNotSupportedException))]
 292 #endif
 293                 public void UploadFile_WebClient_v6 ()
 294                 {
 295                         if (!Socket.OSSupportsIPv6)
 296                                 Assert.Ignore ("IPv6 not supported.");
 297
 298                         UploadFile_WebClient (true);
 299                 }
 300
 301                 public void UploadFile_WebClient (bool ipv6)
 302                 {
 303                         ServerPut sp = new ServerPut (ipv6);
 304                         File.WriteAllText (_tempFile, "0123456789");
 305                         sp.Start ();
 306
 307                         using (WebClient m_WebClient = new WebClient())
 308                         {
 309                                 string uri = String.Format ("ftp://{0}:{1}/uploads/file.txt", EncloseIPv6 (sp.IPAddress), sp.Port);
 310
 311                                 m_WebClient.UploadFile(uri, _tempFile);
 312                         }
 313                         Assert.AreEqual (10, sp.result.Count, "WebClient/Ftp#01");
 314
 315                         sp.Stop ();
 316                 }
 317
 318                 [Test]
 319 #if FEATURE_NO_BSD_SOCKETS
 320                 [ExpectedException (typeof (PlatformNotSupportedException))]
 321 #endif
 322                 public void DownloadFile1_v4 ()
 323                 {
 324                         DownloadFile (new ServerDownload (false));
 325                 }
 326
 327                 [Test]
 328 #if FEATURE_NO_BSD_SOCKETS
 329                 [ExpectedException (typeof (PlatformNotSupportedException))]
 330 #endif
 331                 public void DownloadFile1_v6 ()
 332                 {
 333                         if (!Socket.OSSupportsIPv6)
 334                                 Assert.Ignore ("IPv6 not supported.");
 335
 336                         DownloadFile (new ServerDownload (true));
 337                 }
 338
 339                 [Test]
 340 #if FEATURE_NO_BSD_SOCKETS
 341                 [ExpectedException (typeof (PlatformNotSupportedException))]
 342 #endif
 343                 public void DownloadFileNonLatinChars ()
 344                 {
 345                         string filename = "\u0411\u0430\u0448\u043DRowan-\u041F\u0435\u0441\u043D\u043F\u0440\u043E\u043C\u043E\u043D\u0430\u0445\u0430\u0422\u0435\u043E\u0434\u043E\u0440\u0443\u0441\u0430\u0438\u0437\u0413\u0430\u043C\u043C\u0435\u043B\u044C\u043D\u0430.mp3";
 346                         DownloadFile (new ServerDownload (null, null, filename, false), "ftp://{0}:{1}/" + filename);
 347                 }
 348
 349                 void DownloadFile (ServerDownload sp, string uriTemplate = "ftp://{0}:{1}/file.txt")
 350                 {
 351                         sp.Start ();
 352                         string uri = String.Format (uriTemplate, EncloseIPv6 (sp.IPAddress), sp.Port);
 353                         try {
 354                                 FtpWebRequest ftp = (FtpWebRequest) WebRequest.Create (uri);
 355                                 ftp.KeepAlive = false;
 356                                 ftp.Timeout = 5000;
 357                                 ftp.Method = WebRequestMethods.Ftp.DownloadFile;
 358                                 ftp.UseBinary = true;
 359                                 FtpWebResponse response = (FtpWebResponse) ftp.GetResponse ();
 360                                 Assert.IsTrue ((int) response.StatusCode >= 100 && (int) response.StatusCode < 200, "DL#01");
 361                                 using (Stream st = response.GetResponseStream ()) {
 362                                 }
 363                                 // This should be "220 Bye" or similar (no KeepAlive)
 364                                 Assert.IsTrue ((int) response.StatusCode >= 200 && (int) response.StatusCode < 300, "DL#02");
 365                                 response.Close ();
 366                         } catch (Exception) {
 367                                 if (!String.IsNullOrEmpty (sp.Where))
 368                                         throw new Exception (sp.Where);
 369                                 throw;
 370                         } finally {
 371                                 sp.Stop ();
 372                         }
 373                 }
 374
 375                 [Test]
 376 #if FEATURE_NO_BSD_SOCKETS
 377                 [ExpectedException (typeof (PlatformNotSupportedException))]
 378 #endif
 379                 public void DownloadFile2_v4 ()
 380                 {
 381                         // Some embedded FTP servers in Industrial Automation Hardware report
 382                         // the PWD using backslashes, but allow forward slashes for CWD.
 383                         DownloadFile (new ServerDownload (@"\Users\someuser", "/Users/someuser/", null, false));
 384                 }
 385
 386                 [Test]
 387 #if FEATURE_NO_BSD_SOCKETS
 388                 [ExpectedException (typeof (PlatformNotSupportedException))]
 389 #endif
 390                 public void DownloadFile2_v6 ()
 391                 {
 392                         // Some embedded FTP servers in Industrial Automation Hardware report
 393                         // the PWD using backslashes, but allow forward slashes for CWD.
 394                         DownloadFile (new ServerDownload (@"\Users\someuser", "/Users/someuser/", null, true));
 395                 }
 396
 397                 [Test]
 398 #if FEATURE_NO_BSD_SOCKETS
 399                 [ExpectedException (typeof (PlatformNotSupportedException))]
 400 #endif
 401                 public void DeleteFile1_v4 ()
 402                 {
 403                         DeleteFile1 (false);
 404                 }
 405
 406                 [Test]
 407 #if FEATURE_NO_BSD_SOCKETS
 408                 [ExpectedException (typeof (PlatformNotSupportedException))]
 409 #endif
 410                 public void DeleteFile1_v6 ()
 411                 {
 412                         if (!Socket.OSSupportsIPv6)
 413                                 Assert.Ignore ("IPv6 not supported.");
 414
 415                         DeleteFile1 (true);
 416                 }
 417
 418                 void DeleteFile1 (bool ipv6)
 419                 {
 420                         ServerDeleteFile sp = new ServerDeleteFile (ipv6);
 421                         sp.Start ();
 422                         string uri = String.Format ("ftp://{0}:{1}/file.txt", EncloseIPv6 (sp.IPAddress), sp.Port);
 423                         try {
 424                                 FtpWebRequest ftp = (FtpWebRequest) WebRequest.Create (uri);
 425                                 Console.WriteLine (ftp.RequestUri);
 426                                 ftp.KeepAlive = false;
 427                                 ftp.Timeout = 5000;
 428                                 ftp.Method = WebRequestMethods.Ftp.DeleteFile;
 429                                 ftp.UseBinary = true;
 430                                 FtpWebResponse response = (FtpWebResponse) ftp.GetResponse ();
 431                                 Assert.IsTrue ((int) response.StatusCode >= 200 && (int) response.StatusCode < 300, "DF#01");
 432                                 response.Close ();
 433                         } catch (Exception e) {
 434                                 Console.WriteLine (e);
 435                                 if (!String.IsNullOrEmpty (sp.Where))
 436                                         throw new Exception (sp.Where);
 437                                 throw;
 438                         } finally {
 439                                 sp.Stop ();
 440                         }
 441                 }
 442
 443                 [Test]
 444 #if FEATURE_NO_BSD_SOCKETS
 445                 [ExpectedException (typeof (PlatformNotSupportedException))]
 446 #endif
 447                 public void ListDirectory1_v4 ()
 448                 {
 449                         ListDirectory1 (false);
 450                 }
 451
 452                 [Test]
 453 #if FEATURE_NO_BSD_SOCKETS
 454                 [ExpectedException (typeof (PlatformNotSupportedException))]
 455 #endif
 456                 public void ListDirectory1_v6 ()
 457                 {
 458                         if (!Socket.OSSupportsIPv6)
 459                                 Assert.Ignore ("IPv6 not supported.");
 460
 461                         ListDirectory1 (true);
 462                 }
 463
 464                 void ListDirectory1 (bool ipv6)
 465                 {
 466                         ServerListDirectory sp = new ServerListDirectory (ipv6);
 467                         sp.Start ();
 468                         string uri = String.Format ("ftp://{0}:{1}/somedir/", EncloseIPv6 (sp.IPAddress), sp.Port);
 469                         try {
 470                                 FtpWebRequest ftp = (FtpWebRequest) WebRequest.Create (uri);
 471                                 Console.WriteLine (ftp.RequestUri);
 472                                 ftp.KeepAlive = false;
 473                                 ftp.Timeout = 5000;
 474                                 ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
 475                                 ftp.UseBinary = true;
 476                                 using (FtpWebResponse response = (FtpWebResponse) ftp.GetResponse ()) {
 477                                         StreamReader reader = new StreamReader (response.GetResponseStream ());
 478                                         string result = reader.ReadToEnd ();
 479                                         Assert.IsTrue ((int) response.StatusCode >= 200 && (int) response.StatusCode < 300, "DF#01");
 480                                 }
 481                         } catch (Exception e) {
 482                                 Console.WriteLine (e);
 483                                 if (!String.IsNullOrEmpty (sp.Where))
 484                                         throw new Exception (sp.Where);
 485                                 throw;
 486                         } finally {
 487                                 sp.Stop ();
 488                         }
 489                 }
 490
 491                 string EncloseIPv6 (IPAddress address)
 492                 {
 493                         if (address.AddressFamily == AddressFamily.InterNetwork)
 494                                 return address.ToString ();
 495
 496                         return String.Format ("[{0}]", address.ToString ());
 497                 }
 498
 499                 class ServerListDirectory : FtpServer {
 500                         public ServerListDirectory (bool ipv6)
 501                                 : base (ipv6)
 502                         {
 503                         }
 504
 505                         protected override void Run ()
 506                         {
 507                                 Socket client = control.Accept ();
 508                                 NetworkStream ns = new NetworkStream (client, false);
 509                                 StreamWriter writer = new StreamWriter (ns, Encoding.ASCII);
 510                                 StreamReader reader = new StreamReader (ns, Encoding.UTF8);
 511                                 if (!DoAnonymousLogin (writer, reader)) {
 512                                         client.Close ();
 513                                         return;
 514                                 }
 515
 516                                 if (!DoInitialDialog (writer, reader, "/home/someuser", "/home/someuser/somedir/")) {
 517                                         client.Close ();
 518                                         return;
 519                                 }
 520
 521                                 string str = reader.ReadLine ();
 522                                 string resp = FormatPassiveResponse (str);
 523                                 if (resp == null) {
 524                                         client.Close ();
 525                                         return;
 526                                 }
 527                                 writer.WriteLine (resp);
 528                                 writer.Flush ();
 529
 530                                 str = reader.ReadLine ();
 531                                 if (str != "LIST") {
 532                                         Where = "LIST - '" + str + "'";
 533                                         client.Close ();
 534                                         return;
 535                                 }
 536                                 writer.WriteLine ("150 Here comes the directory listing");
 537                                 writer.Flush ();
 538
 539                                 Socket data_cnc = data.Accept ();
 540                                 byte [] dontcare = Encoding.ASCII.GetBytes ("drwxr-xr-x    2 ftp      ftp          4096 Oct 27 20:17 tests");
 541                                 data_cnc.Send (dontcare, 1, SocketFlags.None);
 542                                 data_cnc.Close ();
 543                                 writer.WriteLine ("226 Directory send Ok");
 544                                 writer.Flush ();
 545                                 if (!EndConversation (writer, reader)) {
 546                                         client.Close ();
 547                                         return;
 548                                 }
 549                                 client.Close ();
 550                         }
 551                 }
 552
 553                 class ServerDeleteFile : FtpServer {
 554                         public ServerDeleteFile (bool ipv6)
 555                                 : base (ipv6)
 556                         {
 557                         }
 558
 559                         protected override void Run ()
 560                         {
 561                                 Socket client = control.Accept ();
 562                                 NetworkStream ns = new NetworkStream (client, false);
 563                                 StreamWriter writer = new StreamWriter (ns, Encoding.ASCII);
 564                                 StreamReader reader = new StreamReader (ns, Encoding.UTF8);
 565                                 if (!DoAnonymousLogin (writer, reader)) {
 566                                         client.Close ();
 567                                         return;
 568                                 }
 569
 570                                 if (!DoInitialDialog (writer, reader, "/home/someuser", "/home/someuser/")) {
 571                                         client.Close ();
 572                                         return;
 573                                 }
 574
 575                                 string str = reader.ReadLine ();
 576                                 if (str.Trim () != "DELE file.txt") {
 577                                         Where = "DELE - " + str;
 578                                         client.Close ();
 579                                         return;
 580                                 }
 581                                 writer.WriteLine ("250 Delete operation successful");
 582                                 writer.Flush ();
 583                                 if (!EndConversation (writer, reader)) {
 584                                         client.Close ();
 585                                         return;
 586                                 }
 587                                 client.Close ();
 588                         }
 589                 }
 590
 591                 class ServerDownload : FtpServer {
 592
 593                         string Pwd, Cwd, Filename;
 594
 595                         public ServerDownload (bool ipv6)
 596                                 : this (null, null, null, ipv6)
 597                         {
 598                         }
 599
 600                         public ServerDownload (string pwd, string cwd, string filename, bool ipv6)
 601                                 : base (ipv6)
 602                         {
 603                                 Pwd = pwd ?? "/home/someuser";
 604                                 Cwd = cwd ?? "/home/someuser/";
 605                                 Filename = filename ?? "file.txt";
 606                         }
 607
 608                         protected override void Run ()
 609                         {
 610                                 Socket client = control.Accept ();
 611                                 NetworkStream ns = new NetworkStream (client, false);
 612                                 StreamWriter writer = new StreamWriter (ns, Encoding.ASCII);
 613                                 StreamReader reader = new StreamReader (ns, Encoding.UTF8);
 614                                 if (!DoAnonymousLogin (writer, reader)) {
 615                                         client.Close ();
 616                                         return;
 617                                 }
 618
 619                                 if (!DoInitialDialog (writer, reader, Pwd, Cwd)) {
 620                                         client.Close ();
 621                                         return;
 622                                 }
 623
 624                                 string str = reader.ReadLine ();
 625                                 string resp = FormatPassiveResponse (str);
 626                                 if (resp == null) {
 627                                         client.Close ();
 628                                         return;
 629                                 }
 630                                 writer.WriteLine (resp);
 631                                 writer.Flush ();
 632
 633                                 str = reader.ReadLine ();
 634                                 if (str != $"RETR {Filename}") {
 635                                         Where = $"RETR - got: {str}, expected: RETR {Filename}";
 636                                         client.Close ();
 637                                         return;
 638                                 }
 639                                 writer.WriteLine ("150 Opening BINARY mode data connection for blah (n bytes)");
 640                                 writer.Flush ();
 641
 642                                 Socket data_cnc = data.Accept ();
 643                                 byte [] dontcare = new byte [1];
 644                                 data_cnc.Receive (dontcare, 1, SocketFlags.None);
 645                                 data_cnc.Close ();
 646                                 writer.WriteLine ("226 File send Ok");
 647                                 writer.Flush ();
 648                                 if (!EndConversation (writer, reader)) {
 649                                         client.Close ();
 650                                         return;
 651                                 }
 652                                 client.Close ();
 653                         }
 654                 }
 655
 656                 class ServerPut : FtpServer {
 657                         public List<byte> result = new List<byte> ();
 658
 659                         public ServerPut (bool ipv6)
 660                                 : base (ipv6)
 661                         {
 662                         }
 663
 664                         protected override void Run ()
 665                         {
 666                                 Socket client = control.Accept ();
 667                                 NetworkStream ns = new NetworkStream (client, false);
 668                                 StreamWriter writer = new StreamWriter (ns, Encoding.ASCII);
 669                                 StreamReader reader = new StreamReader (ns, Encoding.UTF8);
 670                                 if (!DoAnonymousLogin (writer, reader)) {
 671                                         client.Close ();
 672                                         return;
 673                                 }
 674
 675                                 if (!DoInitialDialog (writer, reader, "/home/someuser", "/home/someuser/uploads/")) {
 676                                         client.Close ();
 677                                         return;
 678                                 }
 679
 680                                 string str = reader.ReadLine ();
 681                                 string resp = FormatPassiveResponse (str);
 682                                 if (resp == null) {
 683                                         client.Close ();
 684                                         return;
 685                                 }
 686                                 writer.WriteLine (resp);
 687                                 writer.Flush ();
 688
 689                                 str = reader.ReadLine ();
 690                                 if (str != "STOR file.txt") {
 691                                         Where = "STOR - " + str;
 692                                         client.Close ();
 693                                         return;
 694                                 }
 695                                 writer.WriteLine ("150 Ok to send data");
 696                                 writer.Flush ();
 697
 698                                 Socket data_cnc = data.Accept ();
 699                                 var datastr = new NetworkStream (data_cnc, false);
 700                                 int ch;
 701                                 while ((ch = datastr.ReadByte ()) != -1){
 702                                         result.Add ((byte)ch);
 703
 704                                 }
 705                                 data_cnc.Close ();
 706                                 writer.WriteLine ("226 File received Ok");
 707                                 writer.Flush ();
 708                                 if (!EndConversation (writer, reader)) {
 709                                         client.Close ();
 710                                         return;
 711                                 }
 712                                 client.Close ();
 713                         }
 714                 }
 715
 716                 abstract class FtpServer {
 717                         protected Socket control;
 718                         protected Socket data;
 719                         protected ManualResetEvent evt;
 720                         protected bool ipv6;
 721                         public string Where = "";
 722
 723                         public FtpServer (bool ipv6)
 724                         {
 725                                 control = new Socket (ipv6 ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 726                                 control.Bind (new IPEndPoint (ipv6 ? IPAddress.IPv6Loopback : IPAddress.Loopback, 0));
 727                                 control.Listen (1);
 728                                 data = new Socket (ipv6 ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 729                                 data.Bind (new IPEndPoint (ipv6 ? IPAddress.IPv6Loopback : IPAddress.Loopback, 0));
 730                                 data.Listen (1);
 731                                 this.ipv6 = ipv6;
 732                         }
 733
 734                         public void Start ()
 735                         {
 736                                 evt = new ManualResetEvent (false);
 737                                 Thread th = new Thread (new ThreadStart (Run));
 738                                 th.Start ();
 739                         }
 740
 741                         public void Stop ()
 742                         {
 743                                 evt.Set ();
 744                                 data.Close ();
 745                                 control.Close ();
 746                         }
 747
 748                         // PWD, CWD and TYPE I (type could be moved out of here)
 749                         protected bool DoInitialDialog (StreamWriter writer, StreamReader reader, string pwd, string cwd)
 750                         {
 751                                 string str = reader.ReadLine ();
 752                                 if (!str.StartsWith ("OPTS utf8 on")) {
 753                                         Where = "OPTS utf8 - " + str;
 754                                         return false;
 755                                 }
 756                                 writer.WriteLine ("200 Always in UTF8 mode"); // vsftpd
 757                                 writer.Flush ();
 758                                 str = reader.ReadLine ();
 759                                 if (!str.StartsWith ("PWD")) {
 760                                         Where = "PWD - " + str;
 761                                         return false;
 762                                 }
 763                                 writer.WriteLine ("257 \"{0}\"", pwd);
 764                                 writer.Flush ();
 765                                 str = reader.ReadLine ();
 766                                 if (str != ("CWD " + cwd)) {
 767                                         Where = "CWD - " + str;
 768                                         return false;
 769                                 }
 770                                 writer.WriteLine ("250 Directory changed");
 771                                 writer.Flush ();
 772                                 str = reader.ReadLine ();
 773                                 if (str != ("TYPE I")) {
 774                                         Where = "TYPE - " + str;
 775                                         return false;
 776                                 }
 777                                 writer.WriteLine ("200 Switching to binary mode");
 778                                 writer.Flush ();
 779                                 return true;
 780                         }
 781
 782                         protected bool EndConversation (StreamWriter writer, StreamReader reader)
 783                         {
 784                                 string str = reader.ReadLine ();
 785                                 if (str != "QUIT") {
 786                                         Where = "QUIT";
 787                                         return false;
 788                                 }
 789                                 writer.WriteLine ("220 Bye");
 790                                 writer.Flush ();
 791                                 Thread.Sleep (250);
 792                                 return true;
 793                         }
 794
 795                         protected bool DoAnonymousLogin (StreamWriter writer, StreamReader reader)
 796                         {
 797                                 writer.WriteLine ("220 Welcome to the jungle");
 798                                 writer.Flush ();
 799                                 string str = reader.ReadLine ();
 800                                 if (!str.StartsWith ("USER ")) {
 801                                         Where = "USER";
 802                                         return false;
 803                                 }
 804                                 writer.WriteLine ("331 Say 'Mellon'");
 805                                 writer.Flush ();
 806                                 str = reader.ReadLine ();
 807                                 if (!str.StartsWith ("PASS ")) {
 808                                         Where = "PASS";
 809                                         return false;
 810                                 }
 811                                 writer.WriteLine ("230 Logged in");
 812                                 writer.Flush ();
 813                                 return true;
 814                         }
 815
 816                         protected string FormatPassiveResponse (string request)
 817                         {
 818                                 if (ipv6) {
 819                                         if (request != "EPSV") {
 820                                                 Where = "EPSV";
 821                                                 return null;
 822                                         }
 823
 824                                         IPEndPoint end_data = (IPEndPoint) data.LocalEndPoint;
 825                                         return String.Format ("229 Extended Passive (|||{0}|)", end_data.Port);
 826                                 }
 827                                 else {
 828                                         if (request != "PASV") {
 829                                                 Where = "PASV";
 830                                                 return null;
 831                                         }
 832
 833                                         IPEndPoint end_data = (IPEndPoint) data.LocalEndPoint;
 834                                         byte [] addr_bytes = end_data.Address.GetAddressBytes ();
 835                                         byte [] port = new byte [2];
 836                                         port[0] = (byte) ((end_data.Port >> 8) & 255);
 837                                         port[1] = (byte) (end_data.Port & 255);
 838                                         StringBuilder sb = new StringBuilder ("227 Passive (");
 839                                         foreach (byte b in addr_bytes) {
 840                                                 sb.AppendFormat ("{0},", b);
 841                                         }
 842                                         sb.AppendFormat ("{0},", port [0]);
 843                                         sb.AppendFormat ("{0})", port [1]);
 844                                         return sb.ToString ();
 845                                 }
 846                         }
 847
 848                         public IPAddress IPAddress {
 849                                 get { return ((IPEndPoint) control.LocalEndPoint).Address; }
 850                         }
 851
 852                         public int Port {
 853                                 get { return ((IPEndPoint) control.LocalEndPoint).Port; }
 854                         }
 855
 856                         protected abstract void Run ();
 857                 }
 858         }
 859 }
 860
 861