mcs/class/System.Web/System.Web.Configuration_2.0/WebConfigurationManager.cs

   1 //
   2 // System.Web.Configuration.WebConfigurationManager.cs
   3 //
   4 // Authors:
   5 //      Lluis Sanchez Gual (lluis@novell.com)
   6 //      Chris Toshok (toshok@ximian.com)
   7 //      Marek Habersack <mhabersack@novell.com>
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 // Copyright (C) 2005-2009 Novell, Inc (http://www.novell.com)
  29 //
  30
  31 #if NET_2_0
  32
  33 using System;
  34 using System.IO;
  35 using System.Collections;
  36 using System.Collections.Generic;
  37 using System.Collections.Specialized;
  38 using System.Reflection;
  39 #if MONOWEB_DEP
  40 using Mono.Web.Util;
  41 #endif
  42 using System.Xml;
  43 using System.Configuration;
  44 using System.Configuration.Internal;
  45 using _Configuration = System.Configuration.Configuration;
  46 using System.Web.Util;
  47 using System.Threading;
  48
  49 namespace System.Web.Configuration {
  50
  51         public static class WebConfigurationManager
  52         {
  53                 sealed class ConfigPath
  54                 {
  55                         public string Path;
  56                         public bool InAnotherApp;
  57
  58                         public ConfigPath (string path, bool inAnotherApp)
  59                         {
  60                                 this.Path = path;
  61                                 this.InAnotherApp = inAnotherApp;
  62                         }
  63                 }
  64
  65                 const int SAVE_LOCATIONS_CHECK_INTERVAL = 6000; // milliseconds
  66
  67                 static readonly char[] pathTrimChars = { '/' };
  68                 static readonly object suppressAppReloadLock = new object ();
  69                 static readonly object saveLocationsCacheLock = new object ();
  70                 static readonly ReaderWriterLockSlim sectionCacheLock;
  71
  72 #if !TARGET_J2EE
  73                 static IInternalConfigConfigurationFactory configFactory;
  74                 static Hashtable configurations = Hashtable.Synchronized (new Hashtable ());
  75                 static Dictionary <int, object> sectionCache = new Dictionary <int, object> ();
  76                 static Hashtable configPaths = Hashtable.Synchronized (new Hashtable ());
  77                 static bool suppressAppReload;
  78 #else
  79                 const string AppSettingsKey = "WebConfigurationManager.AppSettings";
  80
  81                 static internal IInternalConfigConfigurationFactory configFactory
  82                 {
  83                         get{
  84                                 IInternalConfigConfigurationFactory factory = (IInternalConfigConfigurationFactory)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory");
  85                                 if (factory == null){
  86                                         lock (AppDomain.CurrentDomain){
  87                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory.initialized");
  88                                                 if (initialized == null){
  89                                                         PropertyInfo prop = typeof(ConfigurationManager).GetProperty("ConfigurationFactory", BindingFlags.Static | BindingFlags.NonPublic);
  90                                                         if (prop != null){
  91                                                                 factory = prop.GetValue(null, null) as IInternalConfigConfigurationFactory;
  92                                                                 configFactory = factory;
  93                                                         }
  94                                                 }
  95                                         }
  96                                 }
  97                                 return factory != null ? factory : configFactory;
  98                         }
  99                         set{
 100                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory", value);
 101                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory.initialized", true);
 102                         }
 103                 }
 104
 105                 static internal Hashtable configurations
 106                 {
 107                         get{
 108                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations");
 109                                 if (table == null){
 110                                         lock (AppDomain.CurrentDomain){
 111                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations.initialized");
 112                                                 if (initialized == null){
 113                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 114                                                         configurations = table;
 115                                                 }
 116                                         }
 117                                 }
 118                                 return table != null ? table : configurations;
 119
 120                         }
 121                         set{
 122                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations", value);
 123                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations.initialized", true);
 124                         }
 125                 }
 126
 127                 static Dictionary <int, object> sectionCache
 128                 {
 129                         get
 130                         {
 131                                 Dictionary <int, object> sectionCache = AppDomain.CurrentDomain.GetData ("sectionCache") as Dictionary <int, object>;
 132                                 if (sectionCache == null) {
 133                                         sectionCache = new Dictionary <int, object> ();
 134                                         AppDomain.CurrentDomain.SetData ("sectionCache", sectionCache);
 135                                 }
 136                                 return sectionCache;
 137                         }
 138                         set
 139                         {
 140                                 AppDomain.CurrentDomain.SetData ("sectionCache", value);
 141                         }
 142                 }
 143
 144                 static internal Hashtable configPaths
 145                 {
 146                         get{
 147                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths");
 148                                 if (table == null){
 149                                         lock (AppDomain.CurrentDomain){
 150                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths.initialized");
 151                                                 if (initialized == null){
 152                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 153                                                         configPaths = table;
 154                                                 }
 155                                         }
 156                                 }
 157                                 return table != null ? table : configPaths;
 158
 159                         }
 160                         set{
 161                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths", value);
 162                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths.initialized", true);
 163                         }
 164                 }
 165 #endif
 166                 static Dictionary <string, DateTime> saveLocationsCache;
 167                 static Timer saveLocationsTimer;
 168
 169                 static ArrayList extra_assemblies = null;
 170                 static internal ArrayList ExtraAssemblies {
 171                         get {
 172                                 if (extra_assemblies == null)
 173                                         extra_assemblies = new ArrayList();
 174                                 return extra_assemblies;
 175                         }
 176                 }
 177
 178                 static bool hasConfigErrors = false;
 179                 static object hasConfigErrorsLock = new object ();
 180                 static internal bool HasConfigErrors {
 181                         get {
 182                                 lock (hasConfigErrorsLock) {
 183                                         return hasConfigErrors;
 184                                 }
 185                         }
 186                 }
 187
 188                 static WebConfigurationManager ()
 189                 {
 190                         configFactory = ConfigurationManager.ConfigurationFactory;
 191                         _Configuration.SaveStart += ConfigurationSaveHandler;
 192                         _Configuration.SaveEnd += ConfigurationSaveHandler;
 193
 194                         // Part of fix for bug #491531
 195                         Type type = Type.GetType ("System.Configuration.CustomizableFileSettingsProvider, System", false);
 196                         if (type != null) {
 197                                 FieldInfo fi = type.GetField ("webConfigurationFileMapType", BindingFlags.Static | BindingFlags.NonPublic);
 198                                 if (fi != null && fi.FieldType == Type.GetType ("System.Type"))
 199                                         fi.SetValue (null, typeof (ApplicationSettingsConfigurationFileMap));
 200                         }
 201
 202                         sectionCacheLock = new ReaderWriterLockSlim ();
 203                 }
 204
 205                 static void ReenableWatcherOnConfigLocation (object state)
 206                 {
 207                         string path = state as string;
 208                         if (String.IsNullOrEmpty (path))
 209                                 return;
 210
 211                         DateTime lastWrite;
 212                         lock (saveLocationsCacheLock) {
 213                                 if (!saveLocationsCache.TryGetValue (path, out lastWrite))
 214                                         lastWrite = DateTime.MinValue;
 215                         }
 216
 217                         DateTime now = DateTime.Now;
 218                         if (lastWrite == DateTime.MinValue || now.Subtract (lastWrite).TotalMilliseconds >= SAVE_LOCATIONS_CHECK_INTERVAL) {
 219                                 saveLocationsTimer.Dispose ();
 220                                 saveLocationsTimer = null;
 221                                 HttpApplicationFactory.EnableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 222                         } else
 223                                 saveLocationsTimer.Change (SAVE_LOCATIONS_CHECK_INTERVAL, SAVE_LOCATIONS_CHECK_INTERVAL);
 224                 }
 225
 226                 static void ConfigurationSaveHandler (_Configuration sender, ConfigurationSaveEventArgs args)
 227                 {
 228                         bool locked = false;
 229                         try {
 230                                 sectionCacheLock.EnterWriteLock ();
 231                                 locked = true;
 232                                 sectionCache.Clear ();
 233                         } finally {
 234                                 if (locked)
 235                                         sectionCacheLock.ExitWriteLock ();
 236                         }
 237
 238                         lock (suppressAppReloadLock) {
 239                                 string rootConfigPath = WebConfigurationHost.GetWebConfigFileName (HttpRuntime.AppDomainAppPath);
 240                                 if (String.Compare (args.StreamPath, rootConfigPath, StringComparison.OrdinalIgnoreCase) == 0) {
 241                                         SuppressAppReload (args.Start);
 242                                         if (args.Start) {
 243                                                 HttpApplicationFactory.DisableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 244
 245                                                 lock (saveLocationsCacheLock) {
 246                                                         if (saveLocationsCache == null)
 247                                                                 saveLocationsCache = new Dictionary <string, DateTime> (StringComparer.Ordinal);
 248                                                         if (saveLocationsCache.ContainsKey (rootConfigPath))
 249                                                                 saveLocationsCache [rootConfigPath] = DateTime.Now;
 250                                                         else
 251                                                                 saveLocationsCache.Add (rootConfigPath, DateTime.Now);
 252
 253                                                         if (saveLocationsTimer == null)
 254                                                                 saveLocationsTimer = new Timer (ReenableWatcherOnConfigLocation,
 255                                                                                                 rootConfigPath,
 256                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL,
 257                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL);
 258                                                 }
 259                                         }
 260                                 }
 261                         }
 262                 }
 263
 264                 public static _Configuration OpenMachineConfiguration ()
 265                 {
 266                         return ConfigurationManager.OpenMachineConfiguration ();
 267                 }
 268
 269                 [MonoLimitation ("locationSubPath is not handled")]
 270                 public static _Configuration OpenMachineConfiguration (string locationSubPath)
 271                 {
 272                         return OpenMachineConfiguration ();
 273                 }
 274
 275                 [MonoLimitation("Mono does not support remote configuration")]
 276                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 277                                                                        string server)
 278                 {
 279                         if (server == null)
 280                                 return OpenMachineConfiguration (locationSubPath);
 281
 282                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 283                 }
 284
 285                 [MonoLimitation("Mono does not support remote configuration")]
 286                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 287                                                                        string server,
 288                                                                        IntPtr userToken)
 289                 {
 290                         if (server == null)
 291                                 return OpenMachineConfiguration (locationSubPath);
 292                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 293                 }
 294
 295                 [MonoLimitation("Mono does not support remote configuration")]
 296                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 297                                                                        string server,
 298                                                                        string userName,
 299                                                                        string password)
 300                 {
 301                         if (server == null)
 302                                 return OpenMachineConfiguration (locationSubPath);
 303                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 304                 }
 305
 306                 public static _Configuration OpenWebConfiguration (string path)
 307                 {
 308                         return OpenWebConfiguration (path, null, null, null, null, null);
 309                 }
 310
 311                 public static _Configuration OpenWebConfiguration (string path, string site)
 312                 {
 313                         return OpenWebConfiguration (path, site, null, null, null, null);
 314                 }
 315
 316                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath)
 317                 {
 318                         return OpenWebConfiguration (path, site, locationSubPath, null, null, null);
 319                 }
 320
 321                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server)
 322                 {
 323                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 324                 }
 325
 326                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, IntPtr userToken)
 327                 {
 328                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 329                 }
 330
 331                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password)
 332                 {
 333                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null, false);
 334                 }
 335
 336                 static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password, bool fweb)
 337                 {
 338                         if (String.IsNullOrEmpty (path))
 339                                 path = "/";
 340
 341                         bool inAnotherApp = false;
 342                         if (!fweb && !String.IsNullOrEmpty (path))
 343                                 path = FindWebConfig (path, out inAnotherApp);
 344
 345                         string confKey = path + site + locationSubPath + server + userName + password;
 346                         _Configuration conf = null;
 347                         conf = (_Configuration) configurations [confKey];
 348                         if (conf == null) {
 349                                 try {
 350                                         conf = ConfigurationFactory.Create (typeof (WebConfigurationHost), null, path, site, locationSubPath, server, userName, password, inAnotherApp);
 351                                         configurations [confKey] = conf;
 352                                 } catch (Exception ex) {
 353                                         lock (hasConfigErrorsLock) {
 354                                                 hasConfigErrors = true;
 355                                         }
 356                                         throw ex;
 357                                 }
 358                         }
 359                         return conf;
 360                 }
 361
 362                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path)
 363                 {
 364                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path);
 365                 }
 366
 367                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site)
 368                 {
 369                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site);
 370                 }
 371
 372                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site, string locationSubPath)
 373                 {
 374                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site, locationSubPath);
 375                 }
 376
 377                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap)
 378                 {
 379                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap);
 380                 }
 381
 382                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap,
 383                                                                              string locationSubPath)
 384                 {
 385                         return OpenMappedMachineConfiguration (fileMap);
 386                 }
 387
 388                 internal static object SafeGetSection (string sectionName, Type configSectionType)
 389                 {
 390                         try {
 391                                 return GetSection (sectionName);
 392                         } catch (Exception) {
 393                                 if (configSectionType != null)
 394                                         return Activator.CreateInstance (configSectionType);
 395                                 return null;
 396                         }
 397                 }
 398
 399                 internal static object SafeGetSection (string sectionName, string path, Type configSectionType)
 400                 {
 401                         try {
 402                                 return GetSection (sectionName, path);
 403                         } catch (Exception) {
 404                                 if (configSectionType != null)
 405                                         return Activator.CreateInstance (configSectionType);
 406                                 return null;
 407                         }
 408                 }
 409
 410                 public static object GetSection (string sectionName)
 411                 {
 412                         HttpContext context = HttpContext.Current;
 413                         return GetSection (sectionName, GetCurrentPath (context), context);
 414                 }
 415
 416                 public static object GetSection (string sectionName, string path)
 417                 {
 418                         return GetSection (sectionName, path, HttpContext.Current);
 419                 }
 420
 421                 static bool LookUpLocation (string relativePath, ref _Configuration defaultConfiguration)
 422                 {
 423                         if (String.IsNullOrEmpty (relativePath))
 424                                 return false;
 425
 426                         _Configuration cnew = defaultConfiguration.FindLocationConfiguration (relativePath, defaultConfiguration);
 427                         if (cnew == defaultConfiguration)
 428                                 return false;
 429
 430                         defaultConfiguration = cnew;
 431                         return true;
 432                 }
 433
 434                 internal static object GetSection (string sectionName, string path, HttpContext context)
 435                 {
 436                         if (String.IsNullOrEmpty (sectionName))
 437                                 return null;
 438
 439                         _Configuration c = OpenWebConfiguration (path, null, null, null, null, null, false);
 440                         string configPath = c.ConfigPath;
 441                         int baseCacheKey = 0;
 442                         int cacheKey;
 443                         bool pathPresent = !String.IsNullOrEmpty (path);
 444                         string locationPath = null;
 445                         bool locked = false;
 446
 447                         if (pathPresent)
 448                                 locationPath = "location_" + path;
 449
 450                         baseCacheKey = sectionName.GetHashCode ();
 451                         if (configPath != null)
 452                                 baseCacheKey ^= configPath.GetHashCode ();
 453
 454                         try {
 455                                 sectionCacheLock.EnterReadLock ();
 456                                 locked = true;
 457
 458                                 object o;
 459                                 if (pathPresent) {
 460                                         cacheKey = baseCacheKey ^ locationPath.GetHashCode ();
 461                                         if (sectionCache.TryGetValue (cacheKey, out o))
 462                                                 return o;
 463
 464                                         cacheKey = baseCacheKey ^ path.GetHashCode ();
 465                                         if (sectionCache.TryGetValue (cacheKey, out o))
 466                                                 return o;
 467                                 }
 468
 469                                 if (sectionCache.TryGetValue (baseCacheKey, out o))
 470                                         return o;
 471                         } finally {
 472                                 if (locked)
 473                                         sectionCacheLock.ExitReadLock ();
 474                         }
 475
 476                         string cachePath = null;
 477                         if (pathPresent) {
 478                                 string relPath;
 479
 480                                 if (VirtualPathUtility.IsRooted (path)) {
 481                                         if (path [0] == '~')
 482                                                 relPath = path.Length > 1 ? path.Substring (2) : String.Empty;
 483                                         else if (path [0] == '/')
 484                                                 relPath = path.Substring (1);
 485                                         else
 486                                                 relPath = path;
 487                                 } else
 488                                         relPath = path;
 489
 490                                 HttpRequest req = context != null ? context.Request : null;
 491                                 if (req != null) {
 492                                         string vdir = VirtualPathUtility.GetDirectory (req.PathNoValidation);
 493                                         if (vdir != null) {
 494                                                 vdir = vdir.TrimEnd (pathTrimChars);
 495                                                 if (String.Compare (c.ConfigPath, vdir, StringComparison.Ordinal) != 0 && LookUpLocation (vdir.Trim (pathTrimChars), ref c))
 496                                                         cachePath = path;
 497                                         }
 498                                 }
 499
 500                                 if (LookUpLocation (relPath, ref c))
 501                                         cachePath = locationPath;
 502                                 else
 503                                         cachePath = path;
 504                         }
 505
 506                         ConfigurationSection section = c.GetSection (sectionName);
 507                         if (section == null)
 508                                 return null;
 509
 510 #if TARGET_J2EE
 511                         object value = get_runtime_object.Invoke (section, new object [0]);
 512                         if (String.CompareOrdinal ("appSettings", sectionName) == 0) {
 513                                 NameValueCollection collection;
 514                                 collection = new KeyValueMergedCollection (HttpContext.Current, (NameValueCollection) value);
 515                                 value = collection;
 516                         }
 517 #else
 518 #if MONOWEB_DEP
 519                         object value = SettingsMappingManager.MapSection (get_runtime_object.Invoke (section, new object [0]));
 520 #else
 521                         object value = null;
 522 #endif
 523 #endif
 524                         if (cachePath != null)
 525                                 cacheKey = baseCacheKey ^ cachePath.GetHashCode ();
 526                         else
 527                                 cacheKey = baseCacheKey;
 528
 529                         AddSectionToCache (cacheKey, value);
 530                         return value;
 531                 }
 532
 533                 static string MapPath (HttpRequest req, string virtualPath)
 534                 {
 535                         if (req != null)
 536                                 return req.MapPath (virtualPath);
 537
 538                         string appRoot = HttpRuntime.AppDomainAppVirtualPath;
 539                         if (!String.IsNullOrEmpty (appRoot) && virtualPath.StartsWith (appRoot, StringComparison.Ordinal)) {
 540                                 if (String.Compare (virtualPath, appRoot, StringComparison.Ordinal) == 0)
 541                                         return HttpRuntime.AppDomainAppPath;
 542                                 return UrlUtils.Combine (HttpRuntime.AppDomainAppPath, virtualPath.Substring (appRoot.Length));
 543                         }
 544
 545                         return null;
 546                 }
 547
 548                 static string GetParentDir (string rootPath, string curPath)
 549                 {
 550                         int len = curPath.Length - 1;
 551                         if (len > 0 && curPath [len] == '/')
 552                                 curPath = curPath.Substring (0, len);
 553
 554                         if (String.Compare (curPath, rootPath, StringComparison.Ordinal) == 0)
 555                                 return null;
 556
 557                         int idx = curPath.LastIndexOf ('/');
 558                         if (idx == -1)
 559                                 return curPath;
 560
 561                         if (idx == 0)
 562                                 return "/";
 563
 564                         return curPath.Substring (0, idx);
 565                 }
 566
 567                 internal static string FindWebConfig (string path)
 568                 {
 569                         bool dummy;
 570
 571                         return FindWebConfig (path, out dummy);
 572                 }
 573
 574                 internal static string FindWebConfig (string path, out bool inAnotherApp)
 575                 {
 576                         inAnotherApp = false;
 577
 578                         if (String.IsNullOrEmpty (path))
 579                                 return path;
 580
 581                         string rootPath = HttpRuntime.AppDomainAppVirtualPath;
 582                         ConfigPath curPath;
 583                         curPath = configPaths [path] as ConfigPath;
 584                         if (curPath != null) {
 585                                 inAnotherApp = curPath.InAnotherApp;
 586                                 return curPath.Path;
 587                         }
 588
 589                         HttpContext ctx = HttpContext.Current;
 590                         HttpRequest req = ctx != null ? ctx.Request : null;
 591                         string physPath = req != null ? VirtualPathUtility.AppendTrailingSlash (MapPath (req, path)) : null;
 592
 593                         if (physPath != null && !physPath.StartsWith (HttpRuntime.AppDomainAppPath, StringComparison.Ordinal))
 594                                 inAnotherApp = true;
 595
 596                         string dir;
 597                         if (inAnotherApp || path [path.Length - 1] == '/')
 598                                 dir = path;
 599                         else {
 600                                 dir = VirtualPathUtility.GetDirectory (path, false);
 601                                 if (dir == null)
 602                                         return path;
 603                         }
 604
 605                         curPath = configPaths [dir] as ConfigPath;
 606                         if (curPath != null) {
 607                                 inAnotherApp = curPath.InAnotherApp;
 608                                 return curPath.Path;
 609                         }
 610
 611                         if (req == null)
 612                                 return path;
 613
 614                         curPath = new ConfigPath (path, inAnotherApp);
 615                         while (String.Compare (curPath.Path, rootPath, StringComparison.Ordinal) != 0) {
 616                                 physPath = MapPath (req, curPath.Path);
 617                                 if (physPath == null) {
 618                                         curPath.Path = rootPath;
 619                                         break;
 620                                 }
 621
 622                                 if (WebConfigurationHost.GetWebConfigFileName (physPath) != null)
 623                                         break;
 624
 625                                 curPath.Path = GetParentDir (rootPath, curPath.Path);
 626                                 if (curPath.Path == null || curPath.Path == "~") {
 627                                         curPath.Path = rootPath;
 628                                         break;
 629                                 }
 630                         }
 631
 632                         if (String.Compare (curPath.Path, path, StringComparison.Ordinal) != 0)
 633                                 configPaths [path] = curPath;
 634                         else
 635                                 configPaths [dir] = curPath;
 636
 637                         return curPath.Path;
 638                 }
 639
 640                 static string GetCurrentPath (HttpContext ctx)
 641                 {
 642                         HttpRequest req = ctx != null ? ctx.Request : null;
 643                         return req != null ? req.PathNoValidation : HttpRuntime.AppDomainAppVirtualPath;
 644                 }
 645
 646                 internal static bool SuppressAppReload (bool newValue)
 647                 {
 648                         bool ret;
 649
 650                         lock (suppressAppReloadLock) {
 651                                 ret = suppressAppReload;
 652                                 suppressAppReload = newValue;
 653                         }
 654
 655                         return ret;
 656                 }
 657
 658                 internal static void RemoveConfigurationFromCache (HttpContext ctx)
 659                 {
 660                         configurations.Remove (GetCurrentPath (ctx));
 661                 }
 662
 663 #if TARGET_J2EE || MONOWEB_DEP
 664                 readonly static MethodInfo get_runtime_object = typeof (ConfigurationSection).GetMethod ("GetRuntimeObject", BindingFlags.NonPublic | BindingFlags.Instance);
 665 #endif
 666
 667                 public static object GetWebApplicationSection (string sectionName)
 668                 {
 669                         HttpContext ctx = HttpContext.Current;
 670                         HttpRequest req = ctx != null ? ctx.Request : null;
 671                         string applicationPath = req != null ? req.ApplicationPath : null;
 672                         return GetSection (sectionName, String.IsNullOrEmpty (applicationPath) ? String.Empty : applicationPath);
 673                 }
 674
 675                 public static NameValueCollection AppSettings {
 676                         get { return ConfigurationManager.AppSettings; }
 677                 }
 678
 679                 public static ConnectionStringSettingsCollection ConnectionStrings {
 680                         get { return ConfigurationManager.ConnectionStrings; }
 681                 }
 682
 683                 internal static IInternalConfigConfigurationFactory ConfigurationFactory {
 684                         get { return configFactory; }
 685                 }
 686
 687                 static void AddSectionToCache (int key, object section)
 688                 {
 689                         object cachedSection;
 690                         bool locked = false;
 691
 692                         try {
 693                                 sectionCacheLock.EnterUpgradeableReadLock ();
 694                                 locked = true;
 695
 696                                 if (sectionCache.TryGetValue (key, out cachedSection) && cachedSection != null)
 697                                         return;
 698
 699                                 bool innerLocked = false;
 700                                 try {
 701                                         sectionCacheLock.EnterWriteLock ();
 702                                         innerLocked = true;
 703                                         sectionCache.Add (key, section);
 704                                 } finally {
 705                                         if (innerLocked)
 706                                                 sectionCacheLock.ExitWriteLock ();
 707                                 }
 708                         } finally {
 709                                 if (locked)
 710                                         sectionCacheLock.ExitUpgradeableReadLock ();
 711                         }
 712                 }
 713
 714 #region stuff copied from WebConfigurationSettings
 715 #if TARGET_J2EE
 716                 static internal IConfigurationSystem oldConfig {
 717                         get {
 718                                 return (IConfigurationSystem)AppDomain.CurrentDomain.GetData("WebConfigurationManager.oldConfig");
 719                         }
 720                         set {
 721                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.oldConfig", value);
 722                         }
 723                 }
 724
 725                 static Web20DefaultConfig config {
 726                         get {
 727                                 return (Web20DefaultConfig) AppDomain.CurrentDomain.GetData ("Web20DefaultConfig.config");
 728                         }
 729                         set {
 730                                 AppDomain.CurrentDomain.SetData ("Web20DefaultConfig.config", value);
 731                         }
 732                 }
 733
 734                 static IInternalConfigSystem configSystem {
 735                         get {
 736                                 return (IInternalConfigSystem) AppDomain.CurrentDomain.GetData ("IInternalConfigSystem.configSystem");
 737                         }
 738                         set {
 739                                 AppDomain.CurrentDomain.SetData ("IInternalConfigSystem.configSystem", value);
 740                         }
 741                 }
 742 #else
 743                 static internal IConfigurationSystem oldConfig;
 744                 static Web20DefaultConfig config;
 745                 //static IInternalConfigSystem configSystem;
 746 #endif
 747                 const BindingFlags privStatic = BindingFlags.NonPublic | BindingFlags.Static;
 748                 static readonly object lockobj = new object ();
 749
 750                 internal static void Init ()
 751                 {
 752                         lock (lockobj) {
 753                                 if (config != null)
 754                                         return;
 755
 756                                 /* deal with the ConfigurationSettings stuff */
 757                                 {
 758                                         Web20DefaultConfig settings = Web20DefaultConfig.GetInstance ();
 759                                         Type t = typeof (ConfigurationSettings);
 760                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 761                                                                                privStatic);
 762
 763                                         if (changeConfig == null)
 764                                                 throw new ConfigurationException ("Cannot find method CCS");
 765
 766                                         object [] args = new object [] {settings};
 767                                         oldConfig = (IConfigurationSystem)changeConfig.Invoke (null, args);
 768                                         config = settings;
 769
 770                                         config.Init ();
 771                                 }
 772
 773                                 /* deal with the ConfigurationManager stuff */
 774                                 {
 775                                         HttpConfigurationSystem system = new HttpConfigurationSystem ();
 776                                         Type t = typeof (ConfigurationManager);
 777                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 778                                                                                privStatic);
 779
 780                                         if (changeConfig == null)
 781                                                 throw new ConfigurationException ("Cannot find method CCS");
 782
 783                                         object [] args = new object [] {system};
 784                                         changeConfig.Invoke (null, args);
 785                                         //configSystem = system;
 786                                 }
 787                         }
 788                 }
 789         }
 790
 791         class Web20DefaultConfig : IConfigurationSystem
 792         {
 793 #if TARGET_J2EE
 794                 static Web20DefaultConfig instance {
 795                         get {
 796                                 Web20DefaultConfig val = (Web20DefaultConfig)AppDomain.CurrentDomain.GetData("Web20DefaultConfig.instance");
 797                                 if (val == null) {
 798                                         val = new Web20DefaultConfig();
 799                                         AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", val);
 800                                 }
 801                                 return val;
 802                         }
 803                         set {
 804                                 AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", value);
 805                         }
 806                 }
 807 #else
 808                 static Web20DefaultConfig instance;
 809 #endif
 810
 811                 static Web20DefaultConfig ()
 812                 {
 813                         instance = new Web20DefaultConfig ();
 814                 }
 815
 816                 public static Web20DefaultConfig GetInstance ()
 817                 {
 818                         return instance;
 819                 }
 820
 821                 public object GetConfig (string sectionName)
 822                 {
 823                         object o = WebConfigurationManager.GetWebApplicationSection (sectionName);
 824
 825                         if (o == null || o is IgnoreSection) {
 826                                 /* this can happen when the section
 827                                  * handler doesn't subclass from
 828                                  * ConfigurationSection.  let's be
 829                                  * nice and try to load it using the
 830                                  * 1.x style routines in case there's
 831                                  * a 1.x section handler registered
 832                                  * for it.
 833                                  */
 834                                 object o1 = WebConfigurationManager.oldConfig.GetConfig (sectionName);
 835                                 if (o1 != null)
 836                                         return o1;
 837                         }
 838
 839                         return o;
 840                 }
 841
 842                 public void Init ()
 843                 {
 844                         // nothing. We need a context.
 845                 }
 846         }
 847 #endregion
 848 }
 849
 850 #endif