66 lines
2.5 KiB
C#
66 lines
2.5 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="ConfigurationFileMap.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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using System;
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using System.IO;
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using System.Security.Permissions;
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namespace System.Configuration {
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//
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// Holds the configuration file mapping for
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// machine.config. It is the base class for
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// ExeConfigurationFileMap and WebConfigurationFileMap.
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//
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public class ConfigurationFileMap : ICloneable {
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// DevDiv #407902 - This used to be two fields: one containing the filename and the other containing
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// a Boolean dictating whether a security check needed to take place. Such a pattern wasn't thread-safe
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// and could be circumvented by malicious callers. Using a single reference field is guaranteed atomic
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// read and write across all platforms, so the race condition is eliminated.
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private Func<string> _getFilenameThunk;
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public ConfigurationFileMap() {
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_getFilenameThunk = GetFilenameFromMachineConfigFilePath;
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}
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public ConfigurationFileMap(string machineConfigFilename) {
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if (string.IsNullOrEmpty(machineConfigFilename))
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throw new ArgumentNullException("machineConfigFilename");
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if (!File.Exists(machineConfigFilename))
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throw new ArgumentException(SR.GetString(SR.Machine_config_file_not_found, machineConfigFilename), "machineConfigFilename");
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MachineConfigFilename = machineConfigFilename;
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}
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// copy ctor used only for cloning
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private ConfigurationFileMap(ConfigurationFileMap other) {
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_getFilenameThunk = other._getFilenameThunk;
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}
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public virtual object Clone() {
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return new ConfigurationFileMap(this);
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}
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private static string GetFilenameFromMachineConfigFilePath() {
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string filename = ClientConfigurationHost.MachineConfigFilePath;
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new FileIOPermission(FileIOPermissionAccess.PathDiscovery, filename).Demand();
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return filename;
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}
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//
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// The name of machine.config.
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//
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public string MachineConfigFilename {
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get {
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return _getFilenameThunk();
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}
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set {
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_getFilenameThunk = () => value;
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}
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}
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}
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}
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