Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Configuration / HttpConfigurationSystem.cs / 3 / HttpConfigurationSystem.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Configuration { using System.Configuration.Internal; using Microsoft.Win32; using System.Collections; using System.Collections.Specialized; using System.Configuration; using System.IO; using System.Threading; using System.Web; using System.Web.Caching; using System.Web.Hosting; using System.Xml; using System.Web.Util; using System.Globalization; using System.Reflection; using System.Security; using System.Security.Permissions; using CultureInfo = System.Globalization.CultureInfo; using Debug = System.Web.Util.Debug; using UnicodeEncoding = System.Text.UnicodeEncoding; using UrlPath = System.Web.Util.UrlPath; internal class HttpConfigurationSystem : IInternalConfigSystem { private const string InternalConfigSettingsFactoryTypeString = "System.Configuration.Internal.InternalConfigSettingsFactory, " + AssemblyRef.SystemConfiguration; internal const string ConfigSystemTypeString = "System.Configuration.Internal.ConfigSystem, " + AssemblyRef.SystemConfiguration; #if !PLATFORM_UNIX // File system paths must be lowercased in UNIX internal const string MachineConfigSubdirectory = "Config"; #else // !PLATFORM_UNIX internal const string MachineConfigSubdirectory = "config"; #endif // !PLATFORM_UNIX internal const string MachineConfigFilename = "machine.config"; internal const string RootWebConfigFilename = "web.config"; internal const string WebConfigFileName = "web.config"; internal const string InetsrvDirectoryName = "inetsrv"; internal const string ApplicationHostConfigFileName = "applicationHost.config"; static private object s_initLock; static private volatile bool s_inited; // Supports IInternalConfigSystem and the file change dependency delegate static private HttpConfigurationSystem s_httpConfigSystem; static private IConfigSystem s_configSystem; static private IConfigMapPath s_configMapPath; static private WebConfigurationHost s_configHost; static private FileChangeEventHandler s_fileChangeEventHandler; static private string s_MsCorLibDirectory; static private string s_MachineConfigurationDirectory; static private string s_MachineConfigurationFilePath; static private string s_RootWebConfigurationFilePath; static private IInternalConfigRoot s_configRoot; static private IInternalConfigSettingsFactory s_configSettingsFactory; static private bool s_initComplete; static HttpConfigurationSystem() { s_initLock = new object(); } HttpConfigurationSystem() {} // // Set this configuration system to the default for requests ConfigurationManager.GetSection // static internal void EnsureInit(IConfigMapPath configMapPath, bool listenToFileChanges, bool initComplete) { if (!s_inited) { lock (s_initLock) { if (!s_inited) { s_initComplete = initComplete; // Use the IIS map path if one is not explicitly provided if (configMapPath == null) { configMapPath = IISMapPath.GetInstance(); } s_configMapPath = configMapPath; Type typeConfigSystem = Type.GetType(ConfigSystemTypeString, true); s_configSystem = (IConfigSystem) Activator.CreateInstance(typeConfigSystem, true); s_configSystem.Init( typeof(WebConfigurationHost), // The config host we'll create and use // The remaining parameters are passed to the config host: true, // Use the supplied configMapPath s_configMapPath, // the configMapPath to use null, // ConfigurationFileMap HostingEnvironment.ApplicationVirtualPath, // app path HostingEnvironment.SiteNameNoDemand, // app site name HostingEnvironment.SiteID); // app site ID s_configRoot = s_configSystem.Root; s_configHost = (WebConfigurationHost) s_configSystem.Host; // Register for config changed notifications HttpConfigurationSystem configSystem = new HttpConfigurationSystem(); if (listenToFileChanges) { s_configRoot.ConfigChanged += new InternalConfigEventHandler(configSystem.OnConfigurationChanged); } // Set the configSystem into the ConfigurationManager class. // Please note that factory.SetConfigurationSystem will end up calling // ConfigurationManager.SetConfigurationSystem, which is an internal static method // in System.Configuration.dll. If we want to call that here, we have to use // reflection and that's what we want to avoid. Type typeFactory = Type.GetType(InternalConfigSettingsFactoryTypeString, true); s_configSettingsFactory = (IInternalConfigSettingsFactory) Activator.CreateInstance(typeFactory, true); s_configSettingsFactory.SetConfigurationSystem(configSystem, initComplete); // The system has been successfully set, so mark that we should use it. s_httpConfigSystem = configSystem; // Mark as having completed initialization after s_httpConfigSystem has been set. // s_inited is coordinated with s_httpConfigSystem in UseHttpConfigurationSystem. s_inited = true; } } } Debug.Assert(s_httpConfigSystem != null, "s_httpConfigSystem != null - The appdomain is using the client configuration system."); } static internal void CompleteInit() { Debug.Assert(!s_initComplete, "!s_initComplete"); s_configSettingsFactory.CompleteInit(); s_configSettingsFactory = null; } // Return true if the HttpConfigurationSystem is being used // by ConfigurationManager. static internal bool UseHttpConfigurationSystem { get { if (!s_inited) { lock (s_initLock) { if (!s_inited) { // // If we ask whether the HttpConfigurationSystem is in use, and it has not // been initialized, then this caller is going to end up using the client // configuration system. So prevent initialization of the HttpConfigurationSystem // by setting s_inited = true. // s_inited = true; Debug.Assert(s_httpConfigSystem == null, "s_httpConfigSystem == null"); } } } return s_httpConfigSystem != null; } } // Return true if the HttpConfigurationSystem is already loaded // by ConfigurationManager. static internal bool IsSet { get { return s_httpConfigSystem != null; } } // // Return the config object for the current context. // If the HttpContext is not available, get the config object // for the web application path. // object IInternalConfigSystem.GetSection(string configKey) { return HttpConfigurationSystem.GetSection(configKey); } // Does not support refresh - the appdomain will restart if // a file changes. void IInternalConfigSystem.RefreshConfig(string sectionName) {} // Supports user config bool IInternalConfigSystem.SupportsUserConfig { get { return false; } } // GetSection // // Get the Config for the current context // static internal object GetSection(string sectionName) { HttpContext context = HttpContext.Current; if (context != null) { return context.GetSection(sectionName); } else { // If there is no context, then lets get the config for // the application we are hosted in. return GetApplicationSection(sectionName); } } // GetSection // // Get the Config for a specific path // static internal object GetSection(string sectionName, VirtualPath path) { Debug.Assert(UseHttpConfigurationSystem, "UseHttpConfigurationSystem"); CachedPathData pathData; pathData = CachedPathData.GetVirtualPathData(path, true); return pathData.ConfigRecord.GetSection(sectionName); } static internal object GetSection(string sectionName, string path) { return GetSection(sectionName, VirtualPath.CreateNonRelativeAllowNull(path)); } // GetAppSection // // Get the Config for a specific path // static internal object GetApplicationSection(string sectionName) { Debug.Assert(UseHttpConfigurationSystem, "UseHttpConfigurationSystem"); CachedPathData pathData; pathData = CachedPathData.GetApplicationPathData(); return pathData.ConfigRecord.GetSection(sectionName); } // // Return the unique configuration record for a config path. // Used by CachedPathData to retreive config records. // static internal IInternalConfigRecord GetUniqueConfigRecord(string configPath) { if (!UseHttpConfigurationSystem) return null; IInternalConfigRecord configRecord = s_configRoot.GetUniqueConfigRecord(configPath); return configRecord; } static internal void AddFileDependency(String file) { if (String.IsNullOrEmpty(file)) return; #if !FEATURE_PAL // No file change notification in Coriolis if (UseHttpConfigurationSystem) { if (s_fileChangeEventHandler == null) { s_fileChangeEventHandler = new FileChangeEventHandler(s_httpConfigSystem.OnConfigFileChanged); } HttpRuntime.FileChangesMonitor.StartMonitoringFile(file, s_fileChangeEventHandler); } #endif // !FEATURE_PAL } internal void OnConfigurationChanged(Object sender, InternalConfigEventArgs e) { HttpRuntime.OnConfigChange(); } internal void OnConfigFileChanged(Object sender, FileChangeEvent e) { HttpRuntime.OnConfigChange(); } static internal String MsCorLibDirectory { [FileIOPermissionAttribute(SecurityAction.Assert, AllFiles=FileIOPermissionAccess.PathDiscovery)] get { if (s_MsCorLibDirectory == null) { s_MsCorLibDirectory = System.Runtime.InteropServices.RuntimeEnvironment.GetRuntimeDirectory(); } return s_MsCorLibDirectory; } } static internal string MachineConfigurationDirectory { get { if (s_MachineConfigurationDirectory == null) { #if !FEATURE_PAL s_MachineConfigurationDirectory = Path.Combine(MsCorLibDirectory, MachineConfigSubdirectory); #else // !FEATURE_PAL System.UInt32 length = 0; // Get the required size if (!UnsafeNativeMethods.GetMachineConfigurationDirectory(null, ref length)) { throw new System.ComponentModel.Win32Exception(); } // Now, create the string and call again System.Text.StringBuilder sb = new System.Text.StringBuilder((int)length); if (!UnsafeNativeMethods.GetMachineConfigurationDirectory(sb, ref length)) { throw new System.ComponentModel.Win32Exception(); } s_MachineConfigurationDirectory = sb.ToString(); #endif // !FEATURE_PAL } return s_MachineConfigurationDirectory; } } static internal string MachineConfigurationFilePath { get { if (s_MachineConfigurationFilePath == null) { s_MachineConfigurationFilePath = Path.Combine(MachineConfigurationDirectory, MachineConfigFilename); } return s_MachineConfigurationFilePath; } } static internal string RootWebConfigurationFilePath { get { if (s_RootWebConfigurationFilePath == null) { s_RootWebConfigurationFilePath = Path.Combine(MachineConfigurationDirectory, RootWebConfigFilename); } return s_RootWebConfigurationFilePath; } // for IIS 7, support setting this file path to support the hostable // web core and admin scenarios set { s_RootWebConfigurationFilePath = value; if (null == s_RootWebConfigurationFilePath) { s_RootWebConfigurationFilePath = Path.Combine(MachineConfigurationDirectory, RootWebConfigFilename); } } } } }
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