mcs/class/System.Web/System.Web/HttpContext.cs

   1 //
   2 // System.Web.HttpContext.cs
   3 //
   4 // Author:
   5 //      Miguel de Icaza (miguel@novell.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   7 //
   8
   9 //
  10 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections;
  33 using System.Configuration;
  34 using System.Globalization;
  35 using System.Runtime.Remoting.Messaging;
  36 using System.Security.Permissions;
  37 using System.Security.Principal;
  38 using System.Threading;
  39 using System.Web.Caching;
  40 using System.Web.Configuration;
  41 using System.Web.SessionState;
  42 using System.Web.UI;
  43 using System.Web.Util;
  44 #if NET_2_0
  45 using System.Collections.Generic;
  46 using System.IO;
  47 using System.Reflection;
  48 using System.Resources;
  49 using System.Web.Compilation;
  50 using System.Web.Profile;
  51 using CustomErrorMode = System.Web.Configuration.CustomErrorsMode;
  52 #endif
  53
  54 namespace System.Web {
  55         // CAS - no InheritanceDemand here as the class is sealed
  56         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  57         public sealed partial class HttpContext : IServiceProvider {
  58                 internal HttpWorkerRequest WorkerRequest;
  59                 HttpApplication app_instance;
  60                 HttpRequest request;
  61                 HttpResponse response;
  62                 HttpSessionState session_state;
  63                 HttpServerUtility server;
  64                 TraceContext trace_context;
  65                 IHttpHandler handler;
  66                 string error_page;
  67                 bool skip_authorization = false;
  68                 IPrincipal user;
  69                 object errors;
  70                 Hashtable items;
  71                 object config_timeout;
  72                 int timeout_possible;
  73                 DateTime time_stamp = DateTime.UtcNow;
  74                 Timer timer;
  75                 Thread thread;
  76                 bool _isProcessingInclude;
  77
  78 #if NET_2_0
  79                 [ThreadStatic]
  80                 static ResourceProviderFactory provider_factory;
  81
  82                 [ThreadStatic]
  83                 static DefaultResourceProviderFactory default_provider_factory;
  84
  85                 [ThreadStatic]
  86                 static Dictionary <string, IResourceProvider> resource_providers;
  87
  88 #if TARGET_JVM
  89                 const string app_global_res_key = "HttpContext.app_global_res_key";
  90                 internal static Assembly AppGlobalResourcesAssembly {
  91                         get { return (Assembly) AppDomain.CurrentDomain.GetData (app_global_res_key); }
  92                         set { AppDomain.CurrentDomain.SetData (app_global_res_key, value); }
  93                 }
  94 #else
  95                 internal static Assembly AppGlobalResourcesAssembly;
  96 #endif
  97                 ProfileBase profile = null;
  98                 LinkedList<IHttpHandler> handlers;
  99
 100                 static DefaultResourceProviderFactory DefaultProviderFactory {
 101                         get {
 102                                 if (default_provider_factory == null)
 103                                         default_provider_factory = new DefaultResourceProviderFactory ();
 104                                 return default_provider_factory;
 105                         }
 106                 }
 107 #endif
 108
 109                 public HttpContext (HttpWorkerRequest wr)
 110                 {
 111                         WorkerRequest = wr;
 112                         request = new HttpRequest (WorkerRequest, this);
 113                         response = new HttpResponse (WorkerRequest, this);
 114                 }
 115
 116                 public HttpContext (HttpRequest request, HttpResponse response)
 117                 {
 118                         this.request = request;
 119                         this.response = response;
 120
 121                 }
 122
 123                 internal bool IsProcessingInclude {
 124                         get { return _isProcessingInclude; }
 125                         set { _isProcessingInclude = value; }
 126                 }
 127
 128                 public Exception [] AllErrors {
 129                         get {
 130                                 if (errors == null)
 131                                         return null;
 132
 133                                 if (errors is Exception){
 134                                         Exception [] all = new Exception [1];
 135                                         all [0] = (Exception) errors;
 136                                         return all;
 137                                 }
 138                                 return (Exception []) (((ArrayList) errors).ToArray (typeof (Exception)));
 139                         }
 140                 }
 141
 142                 public HttpApplicationState Application {
 143                         get {
 144                                 return HttpApplicationFactory.ApplicationState;
 145                         }
 146                 }
 147
 148                 public HttpApplication ApplicationInstance {
 149                         get {
 150                                 return app_instance;
 151                         }
 152
 153                         set {
 154                                 app_instance = value;
 155                         }
 156
 157                 }
 158
 159                 public Cache Cache {
 160                         get {
 161                                 return HttpRuntime.Cache;
 162                         }
 163                 }
 164
 165                 internal Cache InternalCache {
 166                         get {
 167                                 return HttpRuntime.InternalCache;
 168                         }
 169                 }
 170
 171                 //
 172                 // The "Current" property is set just after we have constructed it with
 173                 // the 'HttpContext (HttpWorkerRequest)' constructor.
 174                 //
 175 #if !TARGET_JVM // No remoting CallContext support in Grasshopper
 176                 public static HttpContext Current {
 177                         get {
 178                                 return (HttpContext) CallContext.GetData ("c");
 179                         }
 180
 181                         set {
 182                                 CallContext.SetData ("c", value);
 183                         }
 184                 }
 185 #endif
 186
 187                 public Exception Error {
 188                         get {
 189                                 if (errors == null || (errors is Exception))
 190                                         return (Exception) errors;
 191                                 return (Exception) (((ArrayList) errors) [0]);
 192                         }
 193                 }
 194
 195                 public IHttpHandler Handler {
 196                         get {
 197                                 return handler;
 198                         }
 199
 200                         set {
 201                                 handler = value;
 202                         }
 203                 }
 204
 205                 public bool IsCustomErrorEnabled {
 206                         get {
 207                                 try {
 208                                         return IsCustomErrorEnabledUnsafe;
 209                                 }
 210                                 catch {
 211                                         return false;
 212                                 }
 213                         }
 214                 }
 215
 216                 internal bool IsCustomErrorEnabledUnsafe {
 217                         get {
 218 #if NET_2_0
 219                                 CustomErrorsSection cfg = (CustomErrorsSection) WebConfigurationManager.GetSection ("system.web/customErrors");
 220 #else
 221                                 CustomErrorsConfig cfg = null;
 222                                 try {
 223                                         cfg = (CustomErrorsConfig) GetConfig ("system.web/customErrors");
 224                                 } catch {
 225                                 }
 226
 227                                 if (cfg == null)
 228                                         return false;
 229 #endif
 230
 231                                 if (cfg.Mode == CustomErrorMode.On)
 232                                         return true;
 233
 234                                 return (cfg.Mode == CustomErrorMode.RemoteOnly) && !Request.IsLocal;
 235                         }
 236                 }
 237 #if !TARGET_JVM
 238                 public bool IsDebuggingEnabled {
 239                         get { return HttpRuntime.IsDebuggingEnabled; }
 240                 }
 241 #endif
 242                 public IDictionary Items {
 243                         get {
 244                                 if (items == null)
 245                                         items = new Hashtable ();
 246                                 return items;
 247                         }
 248                 }
 249
 250                 public HttpRequest Request {
 251                         get {
 252                                 return request;
 253                         }
 254                 }
 255
 256                 public HttpResponse Response {
 257                         get {
 258                                 return response;
 259                         }
 260                 }
 261
 262                 public HttpServerUtility Server {
 263                         get {
 264                                 if (server == null)
 265                                         server = new HttpServerUtility (this);
 266                                 return server;
 267                         }
 268                 }
 269
 270                 public HttpSessionState Session {
 271                         get {
 272                                 return session_state;
 273                         }
 274                 }
 275
 276                 public bool SkipAuthorization {
 277                         get {
 278                                 return skip_authorization;
 279                         }
 280
 281                         [SecurityPermission (SecurityAction.Demand, ControlPrincipal = true)]
 282                         set {
 283                                 skip_authorization = value;
 284                         }
 285                 }
 286
 287                 public DateTime Timestamp {
 288                         get {
 289                                 return time_stamp.ToLocalTime ();
 290                         }
 291                 }
 292
 293                 public TraceContext Trace {
 294                         get {
 295                                 if (trace_context == null)
 296                                         trace_context = new TraceContext (this);
 297                                 return trace_context;
 298                         }
 299                 }
 300
 301                 public IPrincipal User {
 302                         get {
 303                                 return user;
 304                         }
 305
 306                         [SecurityPermission (SecurityAction.Demand, ControlPrincipal = true)]
 307                         set {
 308                                 user = value;
 309                         }
 310                 }
 311
 312 #if NET_2_0
 313                 internal bool MapRequestHandlerDone {
 314                         get;
 315                         set;
 316                 }
 317
 318                 // The two properties below are defined only when the IIS7 integrated mode is used.
 319                 // They are useless under Mono
 320                 public RequestNotification CurrentNotification {
 321                         get { throw new PlatformNotSupportedException ("This property is not supported on Mono.");  }
 322                 }
 323
 324                 public bool IsPostNotification {
 325                         get { throw new PlatformNotSupportedException ("This property is not supported on Mono."); }
 326                 }
 327
 328                 internal void PushHandler (IHttpHandler handler)
 329                 {
 330                         if (handler == null)
 331                                 return;
 332                         if (handlers == null)
 333                                 handlers = new LinkedList <IHttpHandler> ();
 334                         handlers.AddLast (handler);
 335                 }
 336
 337                 internal void PopHandler ()
 338                 {
 339                         if (handlers == null || handlers.Count == 0)
 340                                 return;
 341                         handlers.RemoveLast ();
 342                 }
 343
 344                 IHttpHandler GetCurrentHandler ()
 345                 {
 346                         if (handlers == null || handlers.Count == 0)
 347                                 return null;
 348
 349                         return handlers.Last.Value;
 350                 }
 351
 352                 IHttpHandler GetPreviousHandler ()
 353                 {
 354                         if (handlers == null || handlers.Count <= 1)
 355                                 return null;
 356                         LinkedListNode <IHttpHandler> previous = handlers.Last.Previous;
 357                         if (previous != null)
 358                                 return previous.Value;
 359                         return null;
 360                 }
 361
 362                 public IHttpHandler CurrentHandler {
 363                         get { return GetCurrentHandler (); }
 364                 }
 365
 366                 public IHttpHandler PreviousHandler {
 367                         get { return GetPreviousHandler (); }
 368                 }
 369
 370                 internal bool ProfileInitialized {
 371                         get { return profile != null; }
 372                 }
 373
 374                 public ProfileBase Profile {
 375                         get {
 376                                 if (profile == null) {
 377                                         if (Request.IsAuthenticated)
 378                                                 profile = ProfileBase.Create (User.Identity.Name);
 379                                         else
 380                                                 profile = ProfileBase.Create (Request.AnonymousID, false);
 381                                 }
 382                                 return profile;
 383                         }
 384
 385                         internal set {
 386                                 profile = value;
 387                         }
 388                 }
 389 #endif
 390
 391                 public void AddError (Exception errorInfo)
 392                 {
 393                         if (errors == null){
 394                                 errors = errorInfo;
 395                                 return;
 396                         }
 397                         ArrayList l;
 398                         if (errors is Exception){
 399                                 l = new ArrayList ();
 400                                 l.Add (errors);
 401                                 errors = l;
 402                         } else
 403                                 l = (ArrayList) errors;
 404                         l.Add (errorInfo);
 405                 }
 406
 407                 internal void ClearError (Exception e)
 408                 {
 409                         if (errors == e)
 410                                 errors = null;
 411                 }
 412
 413                 internal bool HasError (Exception e)
 414                 {
 415                         if (errors == e)
 416                                 return true;
 417
 418                         return (errors is ArrayList) ?
 419                                 ((ArrayList) errors).Contains (e) : false;
 420                 }
 421
 422                 public void ClearError ()
 423                 {
 424                         errors = null;
 425                 }
 426
 427 #if NET_2_0
 428                 [Obsolete ("use WebConfigurationManager.GetWebApplicationSection")]
 429 #endif
 430                 public static object GetAppConfig (string name)
 431                 {
 432                         object o = ConfigurationSettings.GetConfig (name);
 433
 434                         return o;
 435                 }
 436
 437 #if NET_2_0
 438                 [Obsolete ("see GetSection")]
 439 #endif
 440                 public object GetConfig (string name)
 441                 {
 442 #if NET_2_0
 443                         return GetSection (name);
 444 #else
 445                         return WebConfigurationSettings.GetConfig (name, this);
 446 #endif
 447                 }
 448
 449 #if NET_2_0
 450                 public static object GetGlobalResourceObject (string classKey, string resourceKey)
 451                 {
 452                         return GetGlobalResourceObject (classKey, resourceKey, Thread.CurrentThread.CurrentUICulture);
 453                 }
 454
 455                 static bool EnsureProviderFactory ()
 456                 {
 457                         if (resource_providers == null)
 458                                 resource_providers = new Dictionary <string, IResourceProvider> ();
 459
 460                         if (provider_factory != null)
 461                                 return true;
 462
 463                         GlobalizationSection gs = WebConfigurationManager.GetSection ("system.web/globalization") as GlobalizationSection;
 464
 465                         if (gs == null)
 466                                 return false;
 467
 468                         String rsfTypeName = gs.ResourceProviderFactoryType;
 469                         bool usingDefault = false;
 470                         if (String.IsNullOrEmpty (rsfTypeName)) {
 471                                 usingDefault = true;
 472                                 rsfTypeName = typeof (DefaultResourceProviderFactory).AssemblyQualifiedName;
 473                         }
 474
 475                         Type rsfType = HttpApplication.LoadType (rsfTypeName, true);
 476                         ResourceProviderFactory rpf = Activator.CreateInstance (rsfType) as ResourceProviderFactory;
 477
 478                         if (rpf == null && usingDefault)
 479                                 return false;
 480
 481                         provider_factory = rpf;
 482                         if (usingDefault)
 483                                 default_provider_factory = rpf as DefaultResourceProviderFactory;
 484
 485                         return true;
 486                 }
 487
 488                 internal static IResourceProvider GetResourceProvider (string key, bool isLocal)
 489                 {
 490                         if (!EnsureProviderFactory ())
 491                                 return null;
 492
 493                         // TODO: check if it makes sense to cache the providers and, if yes, maybe
 494                         // we should expire the entries (or just store them in InternalCache?)
 495                         IResourceProvider rp = null;
 496                         if (!resource_providers.TryGetValue (key, out rp)) {
 497                                 if (isLocal)
 498                                         rp = provider_factory.CreateLocalResourceProvider (key);
 499                                 else
 500                                         rp = provider_factory.CreateGlobalResourceProvider (key);
 501
 502                                 if (rp == null) {
 503                                         if (isLocal)
 504                                                 rp = DefaultProviderFactory.CreateLocalResourceProvider (key);
 505                                         else
 506                                                 rp = DefaultProviderFactory.CreateGlobalResourceProvider (key);
 507
 508                                         if (rp == null)
 509                                                 return null;
 510                                 }
 511
 512                                 resource_providers.Add (key, rp);
 513                         }
 514
 515                         return rp;
 516                 }
 517
 518                 static object GetGlobalObjectFromFactory (string classKey, string resourceKey, CultureInfo culture)
 519                 {
 520                         // FIXME: Retention of data
 521                         IResourceProvider rp = GetResourceProvider (classKey, false);
 522                         if (rp == null)
 523                                 return null;
 524
 525                         return rp.GetObject (resourceKey, culture);
 526                 }
 527
 528                 public static object GetGlobalResourceObject (string classKey, string resourceKey, CultureInfo culture)
 529                 {
 530                         return GetGlobalObjectFromFactory (classKey, resourceKey, culture);
 531                 }
 532
 533                 public static object GetLocalResourceObject (string virtualPath, string resourceKey)
 534                 {
 535                         return GetLocalResourceObject (virtualPath, resourceKey, Thread.CurrentThread.CurrentUICulture);
 536                 }
 537
 538                 static object GetLocalObjectFromFactory (string virtualPath, string resourceKey, CultureInfo culture)
 539                 {
 540                         IResourceProvider rp = GetResourceProvider (virtualPath, true);
 541                         if (rp == null)
 542                                 return null;
 543
 544                         return rp.GetObject (resourceKey, culture);
 545                 }
 546
 547                 public static object GetLocalResourceObject (string virtualPath, string resourceKey, CultureInfo culture)
 548                 {
 549                         if (!VirtualPathUtility.IsAbsolute (virtualPath))
 550                                 throw new ArgumentException ("The specified virtualPath was not rooted.");
 551
 552                         return GetLocalObjectFromFactory (virtualPath, resourceKey, culture);
 553                 }
 554
 555                 public object GetSection (string name)
 556                 {
 557                         return WebConfigurationManager.GetSection (name);
 558                 }
 559 #endif
 560                 object IServiceProvider.GetService (Type service)
 561                 {
 562                         if (service == typeof (HttpWorkerRequest))
 563                                 return WorkerRequest;
 564
 565                         //
 566                         // We return everything out of properties in case
 567                         // they are dynamically computed in some form in the future.
 568                         //
 569                         if (service == typeof (HttpApplication))
 570                                 return ApplicationInstance;
 571
 572                         if (service == typeof (HttpRequest))
 573                                 return Request;
 574
 575                         if (service == typeof (HttpResponse))
 576                                 return Response;
 577
 578                         if (service == typeof (HttpSessionState))
 579                                 return Session;
 580
 581                         if (service == typeof (HttpApplicationState))
 582                                 return Application;
 583
 584                         if (service == typeof (IPrincipal))
 585                                 return User;
 586
 587                         if (service == typeof (Cache))
 588                                 return Cache;
 589
 590                         if (service == typeof (HttpContext))
 591                                 return Current;
 592
 593                         if (service == typeof (IHttpHandler))
 594                                 return Handler;
 595
 596                         if (service == typeof (HttpServerUtility))
 597                                 return Server;
 598
 599                         if (service == typeof (TraceContext))
 600                                 return Trace;
 601
 602                         return null;
 603                 }
 604
 605 #if NET_2_0
 606                 public void RemapHandler (IHttpHandler handler)
 607                 {
 608                         if (MapRequestHandlerDone)
 609                                 throw new InvalidOperationException ("The RemapHandler method was called after the MapRequestHandler event occurred.");
 610                         Handler = handler;
 611                 }
 612 #endif
 613
 614                 public void RewritePath (string path)
 615                 {
 616 #if NET_2_0
 617                         RewritePath (path, true);
 618 #else
 619                         RewritePath (path, false);
 620 #endif
 621                 }
 622
 623                 public void RewritePath (string filePath, string pathInfo, string queryString)
 624                 {
 625                         RewritePath (filePath, pathInfo, queryString, false);
 626                 }
 627
 628 #if NET_2_0
 629                 public
 630 #else
 631                 internal
 632 #endif
 633                 void RewritePath (string path, bool rebaseClientPath)
 634                 {
 635                         int qmark = path.IndexOf ('?');
 636                         if (qmark != -1)
 637                                 RewritePath (path.Substring (0, qmark), "", path.Substring (qmark + 1), rebaseClientPath);
 638                         else
 639                                 RewritePath (path, null, null, rebaseClientPath);
 640                 }
 641
 642 #if NET_2_0
 643                 public
 644 #else
 645                 internal
 646 #endif
 647                 void RewritePath (string filePath, string pathInfo, string queryString, bool setClientFilePath)
 648                 {
 649                         if (filePath == null)
 650                                 throw new ArgumentNullException ("filePath");
 651                         if (!VirtualPathUtility.IsValidVirtualPath (filePath))
 652                                 throw new HttpException ("'" + HttpUtility.HtmlEncode (filePath) + "' is not a valid virtual path.");
 653
 654                         bool pathRelative = VirtualPathUtility.IsAppRelative (filePath);
 655                         bool pathAbsolute = pathRelative ? false : VirtualPathUtility.IsAbsolute (filePath);
 656                         if (pathRelative || pathAbsolute) {
 657                                 bool needSubstring = false;
 658
 659                                 if (pathRelative && filePath.Length > 1)
 660                                         needSubstring = true;
 661
 662                                 string bvd = Request.BaseVirtualDir;
 663                                 if (bvd.Length > 1)
 664                                         bvd += "/";
 665
 666                                 string canonizedFilePath = VirtualPathUtility.Canonize (filePath);
 667                                 filePath = VirtualPathUtility.Combine (bvd, needSubstring ? canonizedFilePath.Substring (2) : canonizedFilePath);
 668                         } else
 669                                 filePath = VirtualPathUtility.Combine (VirtualPathUtility.GetDirectory (Request.FilePath), filePath);
 670
 671                         if (!StrUtils.StartsWith (filePath, HttpRuntime.AppDomainAppVirtualPath))
 672                                 throw new HttpException (404, "The virtual path '" + HttpUtility.HtmlEncode (filePath) + "' maps to another application.", filePath);
 673
 674                         Request.SetCurrentExePath (filePath);
 675                         if (setClientFilePath)
 676                                 Request.SetFilePath (filePath);
 677
 678                         // A null pathInfo or queryString is ignored and previous values remain untouched
 679                         if (pathInfo != null)
 680                                 Request.SetPathInfo (pathInfo);
 681
 682                         if (queryString != null)
 683                                 Request.QueryStringRaw = queryString;
 684                 }
 685
 686 #region internals
 687
 688                 internal void SetSession (HttpSessionState state)
 689                 {
 690                         session_state = state;
 691                 }
 692
 693                 // URL of a page used for error redirection.
 694                 internal string ErrorPage {
 695                         get {
 696                                 return error_page;
 697                         }
 698
 699                         set {
 700                                 error_page = value;
 701                         }
 702                 }
 703
 704                 internal TimeSpan ConfigTimeout {
 705                         get {
 706                                 if (config_timeout == null) {
 707 #if NET_2_0
 708                                         HttpRuntimeSection section = (HttpRuntimeSection)WebConfigurationManager.GetSection ("system.web/httpRuntime");
 709                                         config_timeout = section.ExecutionTimeout;
 710 #else
 711                                         HttpRuntimeConfig config = (HttpRuntimeConfig)
 712                                                                 GetConfig ("system.web/httpRuntime");
 713                                         config_timeout = new TimeSpan (0, 0, config.ExecutionTimeout);
 714 #endif
 715                                 }
 716
 717                                 return (TimeSpan) config_timeout;
 718                         }
 719
 720                         set {
 721                                 config_timeout = value;
 722 #if !TARGET_J2EE
 723                                 if (timer != null) {
 724                                         TimeSpan remaining = value - (DateTime.UtcNow - time_stamp);
 725                                         long remaining_ms = Math.Max ((long)remaining.TotalMilliseconds, 0);
 726
 727                                         // See http://msdn2.microsoft.com/en-us/library/7hs7492w.aspx
 728                                         if (remaining_ms > 4294967294)
 729                                                 remaining_ms = 4294967294;
 730
 731                                         timer.Change (remaining_ms, (long)Timeout.Infinite);
 732                                 }
 733 #endif
 734                         }
 735                 }
 736
 737 #if !TARGET_J2EE
 738                 void TimeoutReached(object state) {
 739                         HttpRuntime.QueuePendingRequest (false);
 740                         if (Interlocked.CompareExchange (ref timeout_possible, 0, 0) == 0) {
 741                                 timer.Change(2000, 0);
 742                                 return;
 743                         }
 744                         StopTimeoutTimer();
 745
 746                         thread.Abort (new StepTimeout ());
 747                 }
 748
 749                 internal void StartTimeoutTimer() {
 750                         thread = Thread.CurrentThread;
 751                         timer = new Timer (TimeoutReached, null, (int)ConfigTimeout.TotalMilliseconds, Timeout.Infinite);
 752                 }
 753
 754                 internal void StopTimeoutTimer() {
 755                         if(timer != null) {
 756                                 timer.Dispose ();
 757                                 timer = null;
 758                         }
 759                 }
 760
 761                 internal bool TimeoutPossible {
 762                         get { return (Interlocked.CompareExchange (ref timeout_possible, 1, 1) == 1); }
 763                 }
 764
 765                 internal void BeginTimeoutPossible ()
 766                 {
 767                         timeout_possible = 1;
 768                 }
 769
 770                 internal void EndTimeoutPossible ()
 771                 {
 772                         Interlocked.CompareExchange (ref timeout_possible, 0, 1);
 773                 }
 774 #endif
 775 #endregion
 776         }
 777
 778         class StepTimeout
 779         {
 780         }
 781 }