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 using System.Web.Hosting;
  49
  50 namespace System.Web.Configuration {
  51
  52         public static class WebConfigurationManager
  53         {
  54                 sealed class ConfigPath
  55                 {
  56                         public string Path;
  57                         public bool InAnotherApp;
  58
  59                         public ConfigPath (string path, bool inAnotherApp)
  60                         {
  61                                 this.Path = path;
  62                                 this.InAnotherApp = inAnotherApp;
  63                         }
  64                 }
  65
  66                 const int SAVE_LOCATIONS_CHECK_INTERVAL = 6000; // milliseconds
  67                 const int SECTION_CACHE_LOCK_TIMEOUT = 200; // milliseconds
  68
  69                 static readonly char[] pathTrimChars = { '/' };
  70                 static readonly object suppressAppReloadLock = new object ();
  71                 static readonly object saveLocationsCacheLock = new object ();
  72
  73                 // See comment for the cacheLock field at top of System.Web.Caching/Cache.cs
  74                 static readonly ReaderWriterLockSlim sectionCacheLock;
  75
  76 #if !TARGET_J2EE
  77                 static IInternalConfigConfigurationFactory configFactory;
  78                 static Hashtable configurations = Hashtable.Synchronized (new Hashtable ());
  79                 static Dictionary <int, object> sectionCache = new Dictionary <int, object> ();
  80                 static Hashtable configPaths = Hashtable.Synchronized (new Hashtable ());
  81                 static bool suppressAppReload;
  82 #else
  83                 const string AppSettingsKey = "WebConfigurationManager.AppSettings";
  84
  85                 static internal IInternalConfigConfigurationFactory configFactory
  86                 {
  87                         get{
  88                                 IInternalConfigConfigurationFactory factory = (IInternalConfigConfigurationFactory)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory");
  89                                 if (factory == null){
  90                                         lock (AppDomain.CurrentDomain){
  91                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory.initialized");
  92                                                 if (initialized == null){
  93                                                         PropertyInfo prop = typeof(ConfigurationManager).GetProperty("ConfigurationFactory", BindingFlags.Static | BindingFlags.NonPublic);
  94                                                         if (prop != null){
  95                                                                 factory = prop.GetValue(null, null) as IInternalConfigConfigurationFactory;
  96                                                                 configFactory = factory;
  97                                                         }
  98                                                 }
  99                                         }
 100                                 }
 101                                 return factory != null ? factory : configFactory;
 102                         }
 103                         set{
 104                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory", value);
 105                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory.initialized", true);
 106                         }
 107                 }
 108
 109                 static internal Hashtable configurations
 110                 {
 111                         get{
 112                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations");
 113                                 if (table == null){
 114                                         lock (AppDomain.CurrentDomain){
 115                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations.initialized");
 116                                                 if (initialized == null){
 117                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 118                                                         configurations = table;
 119                                                 }
 120                                         }
 121                                 }
 122                                 return table != null ? table : configurations;
 123
 124                         }
 125                         set{
 126                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations", value);
 127                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations.initialized", true);
 128                         }
 129                 }
 130
 131                 static Dictionary <int, object> sectionCache
 132                 {
 133                         get
 134                         {
 135                                 Dictionary <int, object> sectionCache = AppDomain.CurrentDomain.GetData ("sectionCache") as Dictionary <int, object>;
 136                                 if (sectionCache == null) {
 137                                         sectionCache = new Dictionary <int, object> ();
 138                                         AppDomain.CurrentDomain.SetData ("sectionCache", sectionCache);
 139                                 }
 140                                 return sectionCache;
 141                         }
 142                         set
 143                         {
 144                                 AppDomain.CurrentDomain.SetData ("sectionCache", value);
 145                         }
 146                 }
 147
 148                 static internal Hashtable configPaths
 149                 {
 150                         get{
 151                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths");
 152                                 if (table == null){
 153                                         lock (AppDomain.CurrentDomain){
 154                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths.initialized");
 155                                                 if (initialized == null){
 156                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 157                                                         configPaths = table;
 158                                                 }
 159                                         }
 160                                 }
 161                                 return table != null ? table : configPaths;
 162
 163                         }
 164                         set{
 165                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths", value);
 166                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths.initialized", true);
 167                         }
 168                 }
 169 #endif
 170                 static Dictionary <string, DateTime> saveLocationsCache;
 171                 static Timer saveLocationsTimer;
 172
 173                 static ArrayList extra_assemblies = null;
 174                 static internal ArrayList ExtraAssemblies {
 175                         get {
 176                                 if (extra_assemblies == null)
 177                                         extra_assemblies = new ArrayList();
 178                                 return extra_assemblies;
 179                         }
 180                 }
 181
 182                 static bool hasConfigErrors = false;
 183                 static object hasConfigErrorsLock = new object ();
 184                 static internal bool HasConfigErrors {
 185                         get {
 186                                 lock (hasConfigErrorsLock) {
 187                                         return hasConfigErrors;
 188                                 }
 189                         }
 190                 }
 191
 192                 static WebConfigurationManager ()
 193                 {
 194                         configFactory = ConfigurationManager.ConfigurationFactory;
 195                         _Configuration.SaveStart += ConfigurationSaveHandler;
 196                         _Configuration.SaveEnd += ConfigurationSaveHandler;
 197
 198                         // Part of fix for bug #491531
 199                         Type type = Type.GetType ("System.Configuration.CustomizableFileSettingsProvider, System", false);
 200                         if (type != null) {
 201                                 FieldInfo fi = type.GetField ("webConfigurationFileMapType", BindingFlags.Static | BindingFlags.NonPublic);
 202                                 if (fi != null && fi.FieldType == Type.GetType ("System.Type"))
 203                                         fi.SetValue (null, typeof (ApplicationSettingsConfigurationFileMap));
 204                         }
 205
 206                         sectionCacheLock = new ReaderWriterLockSlim ();
 207                 }
 208
 209                 static void ReenableWatcherOnConfigLocation (object state)
 210                 {
 211                         string path = state as string;
 212                         if (String.IsNullOrEmpty (path))
 213                                 return;
 214
 215                         DateTime lastWrite;
 216                         lock (saveLocationsCacheLock) {
 217                                 if (!saveLocationsCache.TryGetValue (path, out lastWrite))
 218                                         lastWrite = DateTime.MinValue;
 219                         }
 220
 221                         DateTime now = DateTime.Now;
 222                         if (lastWrite == DateTime.MinValue || now.Subtract (lastWrite).TotalMilliseconds >= SAVE_LOCATIONS_CHECK_INTERVAL) {
 223                                 saveLocationsTimer.Dispose ();
 224                                 saveLocationsTimer = null;
 225                                 HttpApplicationFactory.EnableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 226                         } else
 227                                 saveLocationsTimer.Change (SAVE_LOCATIONS_CHECK_INTERVAL, SAVE_LOCATIONS_CHECK_INTERVAL);
 228                 }
 229
 230                 static void ConfigurationSaveHandler (_Configuration sender, ConfigurationSaveEventArgs args)
 231                 {
 232                         try {
 233                                 sectionCacheLock.EnterWriteLock ();
 234                                 sectionCache.Clear ();
 235                         } finally {
 236                                 sectionCacheLock.ExitWriteLock ();
 237                         }
 238
 239                         lock (suppressAppReloadLock) {
 240                                 string rootConfigPath = WebConfigurationHost.GetWebConfigFileName (HttpRuntime.AppDomainAppPath);
 241                                 if (String.Compare (args.StreamPath, rootConfigPath, StringComparison.OrdinalIgnoreCase) == 0) {
 242                                         SuppressAppReload (args.Start);
 243                                         if (args.Start) {
 244                                                 HttpApplicationFactory.DisableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 245
 246                                                 lock (saveLocationsCacheLock) {
 247                                                         if (saveLocationsCache == null)
 248                                                                 saveLocationsCache = new Dictionary <string, DateTime> (StringComparer.Ordinal);
 249                                                         if (saveLocationsCache.ContainsKey (rootConfigPath))
 250                                                                 saveLocationsCache [rootConfigPath] = DateTime.Now;
 251                                                         else
 252                                                                 saveLocationsCache.Add (rootConfigPath, DateTime.Now);
 253
 254                                                         if (saveLocationsTimer == null)
 255                                                                 saveLocationsTimer = new Timer (ReenableWatcherOnConfigLocation,
 256                                                                                                 rootConfigPath,
 257                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL,
 258                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL);
 259                                                 }
 260                                         }
 261                                 }
 262                         }
 263                 }
 264
 265                 public static _Configuration OpenMachineConfiguration ()
 266                 {
 267                         return ConfigurationManager.OpenMachineConfiguration ();
 268                 }
 269
 270                 [MonoLimitation ("locationSubPath is not handled")]
 271                 public static _Configuration OpenMachineConfiguration (string locationSubPath)
 272                 {
 273                         return OpenMachineConfiguration ();
 274                 }
 275
 276                 [MonoLimitation("Mono does not support remote configuration")]
 277                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 278                                                                        string server)
 279                 {
 280                         if (server == null)
 281                                 return OpenMachineConfiguration (locationSubPath);
 282
 283                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 284                 }
 285
 286                 [MonoLimitation("Mono does not support remote configuration")]
 287                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 288                                                                        string server,
 289                                                                        IntPtr userToken)
 290                 {
 291                         if (server == null)
 292                                 return OpenMachineConfiguration (locationSubPath);
 293                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 294                 }
 295
 296                 [MonoLimitation("Mono does not support remote configuration")]
 297                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 298                                                                        string server,
 299                                                                        string userName,
 300                                                                        string password)
 301                 {
 302                         if (server == null)
 303                                 return OpenMachineConfiguration (locationSubPath);
 304                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 305                 }
 306
 307                 public static _Configuration OpenWebConfiguration (string path)
 308                 {
 309                         return OpenWebConfiguration (path, null, null, null, null, null);
 310                 }
 311
 312                 public static _Configuration OpenWebConfiguration (string path, string site)
 313                 {
 314                         return OpenWebConfiguration (path, site, null, null, null, null);
 315                 }
 316
 317                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath)
 318                 {
 319                         return OpenWebConfiguration (path, site, locationSubPath, null, null, null);
 320                 }
 321
 322                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server)
 323                 {
 324                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 325                 }
 326
 327                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, IntPtr userToken)
 328                 {
 329                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 330                 }
 331
 332                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password)
 333                 {
 334                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null, false);
 335                 }
 336
 337                 static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password, bool fweb)
 338                 {
 339                         if (String.IsNullOrEmpty (path))
 340                                 path = "/";
 341
 342                         bool inAnotherApp = false;
 343                         if (!fweb && !String.IsNullOrEmpty (path))
 344                                 path = FindWebConfig (path, out inAnotherApp);
 345
 346                         string confKey = path + site + locationSubPath + server + userName + password;
 347                         _Configuration conf = null;
 348                         conf = (_Configuration) configurations [confKey];
 349                         if (conf == null) {
 350                                 try {
 351                                         conf = ConfigurationFactory.Create (typeof (WebConfigurationHost), null, path, site, locationSubPath, server, userName, password, inAnotherApp);
 352                                         configurations [confKey] = conf;
 353                                 } catch (Exception ex) {
 354                                         lock (hasConfigErrorsLock) {
 355                                                 hasConfigErrors = true;
 356                                         }
 357                                         throw ex;
 358                                 }
 359                         }
 360                         return conf;
 361                 }
 362
 363                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path)
 364                 {
 365                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path);
 366                 }
 367
 368                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site)
 369                 {
 370                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site);
 371                 }
 372
 373                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site, string locationSubPath)
 374                 {
 375                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site, locationSubPath);
 376                 }
 377
 378                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap)
 379                 {
 380                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap);
 381                 }
 382
 383                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap,
 384                                                                              string locationSubPath)
 385                 {
 386                         return OpenMappedMachineConfiguration (fileMap);
 387                 }
 388
 389                 internal static object SafeGetSection (string sectionName, Type configSectionType)
 390                 {
 391                         try {
 392                                 return GetSection (sectionName);
 393                         } catch (Exception) {
 394                                 if (configSectionType != null)
 395                                         return Activator.CreateInstance (configSectionType);
 396                                 return null;
 397                         }
 398                 }
 399
 400                 internal static object SafeGetSection (string sectionName, string path, Type configSectionType)
 401                 {
 402                         try {
 403                                 return GetSection (sectionName, path);
 404                         } catch (Exception) {
 405                                 if (configSectionType != null)
 406                                         return Activator.CreateInstance (configSectionType);
 407                                 return null;
 408                         }
 409                 }
 410
 411                 public static object GetSection (string sectionName)
 412                 {
 413                         HttpContext context = HttpContext.Current;
 414                         return GetSection (sectionName, GetCurrentPath (context), context);
 415                 }
 416
 417                 public static object GetSection (string sectionName, string path)
 418                 {
 419                         return GetSection (sectionName, path, HttpContext.Current);
 420                 }
 421
 422                 static bool LookUpLocation (string relativePath, ref _Configuration defaultConfiguration)
 423                 {
 424                         if (String.IsNullOrEmpty (relativePath))
 425                                 return false;
 426
 427                         _Configuration cnew = defaultConfiguration.FindLocationConfiguration (relativePath, defaultConfiguration);
 428                         if (cnew == defaultConfiguration)
 429                                 return false;
 430
 431                         defaultConfiguration = cnew;
 432                         return true;
 433                 }
 434
 435                 internal static object GetSection (string sectionName, string path, HttpContext context)
 436                 {
 437                         if (String.IsNullOrEmpty (sectionName))
 438                                 return null;
 439
 440                         _Configuration c = OpenWebConfiguration (path, null, null, null, null, null, false);
 441                         string configPath = c.ConfigPath;
 442                         int baseCacheKey = 0;
 443                         int cacheKey;
 444                         bool pathPresent = !String.IsNullOrEmpty (path);
 445                         string locationPath = null;
 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
 457                                 object o;
 458                                 if (pathPresent) {
 459                                         cacheKey = baseCacheKey ^ locationPath.GetHashCode ();
 460                                         if (sectionCache.TryGetValue (cacheKey, out o))
 461                                                 return o;
 462
 463                                         cacheKey = baseCacheKey ^ path.GetHashCode ();
 464                                         if (sectionCache.TryGetValue (cacheKey, out o))
 465                                                 return o;
 466                                 }
 467
 468                                 if (sectionCache.TryGetValue (baseCacheKey, out o))
 469                                         return o;
 470                         } finally {
 471                                 sectionCacheLock.ExitReadLock ();
 472                         }
 473
 474                         string cachePath = null;
 475                         if (pathPresent) {
 476                                 string relPath;
 477
 478                                 if (VirtualPathUtility.IsRooted (path)) {
 479                                         if (path [0] == '~')
 480                                                 relPath = path.Length > 1 ? path.Substring (2) : String.Empty;
 481                                         else if (path [0] == '/')
 482                                                 relPath = path.Substring (1);
 483                                         else
 484                                                 relPath = path;
 485                                 } else
 486                                         relPath = path;
 487
 488                                 HttpRequest req = context != null ? context.Request : null;
 489                                 if (req != null) {
 490                                         string vdir = VirtualPathUtility.GetDirectory (req.PathNoValidation);
 491                                         if (vdir != null) {
 492                                                 vdir = vdir.TrimEnd (pathTrimChars);
 493                                                 if (String.Compare (c.ConfigPath, vdir, StringComparison.Ordinal) != 0 && LookUpLocation (vdir.Trim (pathTrimChars), ref c))
 494                                                         cachePath = path;
 495                                         }
 496                                 }
 497
 498                                 if (LookUpLocation (relPath, ref c))
 499                                         cachePath = locationPath;
 500                                 else
 501                                         cachePath = path;
 502                         }
 503
 504                         ConfigurationSection section = c.GetSection (sectionName);
 505                         if (section == null)
 506                                 return null;
 507
 508 #if TARGET_J2EE
 509                         object value = get_runtime_object.Invoke (section, new object [0]);
 510                         if (String.CompareOrdinal ("appSettings", sectionName) == 0) {
 511                                 NameValueCollection collection;
 512                                 collection = new KeyValueMergedCollection (HttpContext.Current, (NameValueCollection) value);
 513                                 value = collection;
 514                         }
 515 #else
 516 #if MONOWEB_DEP
 517                         object value = SettingsMappingManager.MapSection (get_runtime_object.Invoke (section, new object [0]));
 518 #else
 519                         object value = null;
 520 #endif
 521 #endif
 522                         if (cachePath != null)
 523                                 cacheKey = baseCacheKey ^ cachePath.GetHashCode ();
 524                         else
 525                                 cacheKey = baseCacheKey;
 526
 527                         AddSectionToCache (cacheKey, value);
 528                         return value;
 529                 }
 530
 531                 static string MapPath (HttpRequest req, string virtualPath)
 532                 {
 533                         if (req != null)
 534                                 return req.MapPath (virtualPath);
 535
 536                         string appRoot = HttpRuntime.AppDomainAppVirtualPath;
 537                         if (!String.IsNullOrEmpty (appRoot) && virtualPath.StartsWith (appRoot, StringComparison.Ordinal)) {
 538                                 if (String.Compare (virtualPath, appRoot, StringComparison.Ordinal) == 0)
 539                                         return HttpRuntime.AppDomainAppPath;
 540                                 return UrlUtils.Combine (HttpRuntime.AppDomainAppPath, virtualPath.Substring (appRoot.Length));
 541                         }
 542
 543                         return null;
 544                 }
 545
 546                 static string GetParentDir (string rootPath, string curPath)
 547                 {
 548                         int len = curPath.Length - 1;
 549                         if (len > 0 && curPath [len] == '/')
 550                                 curPath = curPath.Substring (0, len);
 551
 552                         if (String.Compare (curPath, rootPath, StringComparison.Ordinal) == 0)
 553                                 return null;
 554
 555                         int idx = curPath.LastIndexOf ('/');
 556                         if (idx == -1)
 557                                 return curPath;
 558
 559                         if (idx == 0)
 560                                 return "/";
 561
 562                         return curPath.Substring (0, idx);
 563                 }
 564
 565                 internal static string FindWebConfig (string path)
 566                 {
 567                         bool dummy;
 568
 569                         return FindWebConfig (path, out dummy);
 570                 }
 571
 572                 internal static string FindWebConfig (string path, out bool inAnotherApp)
 573                 {
 574                         inAnotherApp = false;
 575
 576                         if (String.IsNullOrEmpty (path))
 577                                 return path;
 578
 579                         if (HostingEnvironment.VirtualPathProvider != null) {
 580                                 if (HostingEnvironment.VirtualPathProvider.DirectoryExists (path))
 581                                         path = VirtualPathUtility.AppendTrailingSlash (path);
 582                         }
 583
 584
 585                         string rootPath = HttpRuntime.AppDomainAppVirtualPath;
 586                         ConfigPath curPath;
 587                         curPath = configPaths [path] as ConfigPath;
 588                         if (curPath != null) {
 589                                 inAnotherApp = curPath.InAnotherApp;
 590                                 return curPath.Path;
 591                         }
 592
 593                         HttpContext ctx = HttpContext.Current;
 594                         HttpRequest req = ctx != null ? ctx.Request : null;
 595                         string physPath = req != null ? VirtualPathUtility.AppendTrailingSlash (MapPath (req, path)) : null;
 596                         string appDomainPath = HttpRuntime.AppDomainAppPath;
 597
 598                         if (physPath != null && appDomainPath != null && !physPath.StartsWith (appDomainPath, StringComparison.Ordinal))
 599                                 inAnotherApp = true;
 600
 601                         string dir;
 602                         if (inAnotherApp || path [path.Length - 1] == '/')
 603                                 dir = path;
 604                         else {
 605                                 dir = VirtualPathUtility.GetDirectory (path, false);
 606                                 if (dir == null)
 607                                         return path;
 608                         }
 609
 610                         curPath = configPaths [dir] as ConfigPath;
 611                         if (curPath != null) {
 612                                 inAnotherApp = curPath.InAnotherApp;
 613                                 return curPath.Path;
 614                         }
 615
 616                         if (req == null)
 617                                 return path;
 618
 619                         curPath = new ConfigPath (path, inAnotherApp);
 620                         while (String.Compare (curPath.Path, rootPath, StringComparison.Ordinal) != 0) {
 621                                 physPath = MapPath (req, curPath.Path);
 622                                 if (physPath == null) {
 623                                         curPath.Path = rootPath;
 624                                         break;
 625                                 }
 626
 627                                 if (WebConfigurationHost.GetWebConfigFileName (physPath) != null)
 628                                         break;
 629
 630                                 curPath.Path = GetParentDir (rootPath, curPath.Path);
 631                                 if (curPath.Path == null || curPath.Path == "~") {
 632                                         curPath.Path = rootPath;
 633                                         break;
 634                                 }
 635                         }
 636
 637                         if (String.Compare (curPath.Path, path, StringComparison.Ordinal) != 0)
 638                                 configPaths [path] = curPath;
 639                         else
 640                                 configPaths [dir] = curPath;
 641
 642                         return curPath.Path;
 643                 }
 644
 645                 static string GetCurrentPath (HttpContext ctx)
 646                 {
 647                         HttpRequest req = ctx != null ? ctx.Request : null;
 648                         return req != null ? req.PathNoValidation : HttpRuntime.AppDomainAppVirtualPath;
 649                 }
 650
 651                 internal static bool SuppressAppReload (bool newValue)
 652                 {
 653                         bool ret;
 654
 655                         lock (suppressAppReloadLock) {
 656                                 ret = suppressAppReload;
 657                                 suppressAppReload = newValue;
 658                         }
 659
 660                         return ret;
 661                 }
 662
 663                 internal static void RemoveConfigurationFromCache (HttpContext ctx)
 664                 {
 665                         configurations.Remove (GetCurrentPath (ctx));
 666                 }
 667
 668 #if TARGET_J2EE || MONOWEB_DEP
 669                 readonly static MethodInfo get_runtime_object = typeof (ConfigurationSection).GetMethod ("GetRuntimeObject", BindingFlags.NonPublic | BindingFlags.Instance);
 670 #endif
 671
 672                 public static object GetWebApplicationSection (string sectionName)
 673                 {
 674                         HttpContext ctx = HttpContext.Current;
 675                         HttpRequest req = ctx != null ? ctx.Request : null;
 676                         string applicationPath = req != null ? req.ApplicationPath : null;
 677                         return GetSection (sectionName, String.IsNullOrEmpty (applicationPath) ? String.Empty : applicationPath);
 678                 }
 679
 680                 public static NameValueCollection AppSettings {
 681                         get { return ConfigurationManager.AppSettings; }
 682                 }
 683
 684                 public static ConnectionStringSettingsCollection ConnectionStrings {
 685                         get { return ConfigurationManager.ConnectionStrings; }
 686                 }
 687
 688                 internal static IInternalConfigConfigurationFactory ConfigurationFactory {
 689                         get { return configFactory; }
 690                 }
 691
 692                 static void AddSectionToCache (int key, object section)
 693                 {
 694                         object cachedSection;
 695
 696                         try {
 697                                 if (!sectionCacheLock.TryEnterUpgradeableReadLock (SECTION_CACHE_LOCK_TIMEOUT))
 698                                         return;
 699
 700                                 if (sectionCache.TryGetValue (key, out cachedSection) && cachedSection != null)
 701                                         return;
 702
 703                                 try {
 704                                         if (!sectionCacheLock.TryEnterWriteLock (SECTION_CACHE_LOCK_TIMEOUT))
 705                                                 return;
 706                                         sectionCache.Add (key, section);
 707                                 } finally {
 708                                         try {
 709                                                 sectionCacheLock.ExitWriteLock ();
 710                                         } catch (SynchronizationLockException) {
 711                                                 // we can ignore it here
 712                                         }
 713                                 }
 714                         } finally {
 715                                 try {
 716                                         sectionCacheLock.ExitUpgradeableReadLock ();
 717                                 } catch (SynchronizationLockException) {
 718                                         // we can ignore it here
 719                                 }
 720                         }
 721                 }
 722
 723 #region stuff copied from WebConfigurationSettings
 724 #if TARGET_J2EE
 725                 static internal IConfigurationSystem oldConfig {
 726                         get {
 727                                 return (IConfigurationSystem)AppDomain.CurrentDomain.GetData("WebConfigurationManager.oldConfig");
 728                         }
 729                         set {
 730                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.oldConfig", value);
 731                         }
 732                 }
 733
 734                 static Web20DefaultConfig config {
 735                         get {
 736                                 return (Web20DefaultConfig) AppDomain.CurrentDomain.GetData ("Web20DefaultConfig.config");
 737                         }
 738                         set {
 739                                 AppDomain.CurrentDomain.SetData ("Web20DefaultConfig.config", value);
 740                         }
 741                 }
 742
 743                 static IInternalConfigSystem configSystem {
 744                         get {
 745                                 return (IInternalConfigSystem) AppDomain.CurrentDomain.GetData ("IInternalConfigSystem.configSystem");
 746                         }
 747                         set {
 748                                 AppDomain.CurrentDomain.SetData ("IInternalConfigSystem.configSystem", value);
 749                         }
 750                 }
 751 #else
 752                 static internal IConfigurationSystem oldConfig;
 753                 static Web20DefaultConfig config;
 754                 //static IInternalConfigSystem configSystem;
 755 #endif
 756                 const BindingFlags privStatic = BindingFlags.NonPublic | BindingFlags.Static;
 757                 static readonly object lockobj = new object ();
 758
 759                 internal static void Init ()
 760                 {
 761                         lock (lockobj) {
 762                                 if (config != null)
 763                                         return;
 764
 765                                 /* deal with the ConfigurationSettings stuff */
 766                                 {
 767                                         Web20DefaultConfig settings = Web20DefaultConfig.GetInstance ();
 768                                         Type t = typeof (ConfigurationSettings);
 769                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 770                                                                                privStatic);
 771
 772                                         if (changeConfig == null)
 773                                                 throw new ConfigurationException ("Cannot find method CCS");
 774
 775                                         object [] args = new object [] {settings};
 776                                         oldConfig = (IConfigurationSystem)changeConfig.Invoke (null, args);
 777                                         config = settings;
 778
 779                                         config.Init ();
 780                                 }
 781
 782                                 /* deal with the ConfigurationManager stuff */
 783                                 {
 784                                         HttpConfigurationSystem system = new HttpConfigurationSystem ();
 785                                         Type t = typeof (ConfigurationManager);
 786                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 787                                                                                privStatic);
 788
 789                                         if (changeConfig == null)
 790                                                 throw new ConfigurationException ("Cannot find method CCS");
 791
 792                                         object [] args = new object [] {system};
 793                                         changeConfig.Invoke (null, args);
 794                                         //configSystem = system;
 795                                 }
 796                         }
 797                 }
 798         }
 799
 800         class Web20DefaultConfig : IConfigurationSystem
 801         {
 802 #if TARGET_J2EE
 803                 static Web20DefaultConfig instance {
 804                         get {
 805                                 Web20DefaultConfig val = (Web20DefaultConfig)AppDomain.CurrentDomain.GetData("Web20DefaultConfig.instance");
 806                                 if (val == null) {
 807                                         val = new Web20DefaultConfig();
 808                                         AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", val);
 809                                 }
 810                                 return val;
 811                         }
 812                         set {
 813                                 AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", value);
 814                         }
 815                 }
 816 #else
 817                 static Web20DefaultConfig instance;
 818 #endif
 819
 820                 static Web20DefaultConfig ()
 821                 {
 822                         instance = new Web20DefaultConfig ();
 823                 }
 824
 825                 public static Web20DefaultConfig GetInstance ()
 826                 {
 827                         return instance;
 828                 }
 829
 830                 public object GetConfig (string sectionName)
 831                 {
 832                         object o = WebConfigurationManager.GetWebApplicationSection (sectionName);
 833
 834                         if (o == null || o is IgnoreSection) {
 835                                 /* this can happen when the section
 836                                  * handler doesn't subclass from
 837                                  * ConfigurationSection.  let's be
 838                                  * nice and try to load it using the
 839                                  * 1.x style routines in case there's
 840                                  * a 1.x section handler registered
 841                                  * for it.
 842                                  */
 843                                 object o1 = WebConfigurationManager.oldConfig.GetConfig (sectionName);
 844                                 if (o1 != null)
 845                                         return o1;
 846                         }
 847
 848                         return o;
 849                 }
 850
 851                 public void Init ()
 852                 {
 853                         // nothing. We need a context.
 854                 }
 855         }
 856 #endregion
 857 }
 858
 859 #endif