Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/VirtualDirectoryMapping.cs

@@ -0,0 +1,146 @@
+//------------------------------------------------------------------------------
+// <copyright file="VirtualDirectoryMapping.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration {
+    using System;
+    using System.Configuration;
+    using System.IO;
+    using System.Web.Util;
+    using System.Security.Permissions;
+
+    //
+    // Maps a virtual directory to a physical directory and its config file.
+    //
+    public sealed class VirtualDirectoryMapping {
+        VirtualPath  _virtualDirectory;
+        string  _physicalDirectory;
+        string  _configFileBaseName;
+        bool    _isAppRoot;
+
+        const string DEFAULT_BASE_NAME = "web.config";
+
+        public VirtualDirectoryMapping(string physicalDirectory, bool isAppRoot) 
+            : this(null, physicalDirectory, isAppRoot, DEFAULT_BASE_NAME) {
+
+        }
+
+        public VirtualDirectoryMapping(string physicalDirectory, bool isAppRoot, string configFileBaseName) 
+            : this(null, physicalDirectory, isAppRoot, configFileBaseName) {
+        }
+
+        private VirtualDirectoryMapping(VirtualPath virtualDirectory, string physicalDirectory, bool isAppRoot, string configFileBaseName) {
+            _virtualDirectory = virtualDirectory;
+            _isAppRoot = isAppRoot;
+
+            PhysicalDirectory = physicalDirectory;
+            ConfigFileBaseName = configFileBaseName;
+        }
+
+        internal VirtualDirectoryMapping Clone() {
+            return new VirtualDirectoryMapping(_virtualDirectory, _physicalDirectory, _isAppRoot, _configFileBaseName);
+        }
+
+        //
+        // Get the virtual directory.
+        // Not settable because it is set when it is added to a collection.
+        //
+        public string VirtualDirectory {
+            get {
+                return (_virtualDirectory != null) ? _virtualDirectory.VirtualPathString : string.Empty;
+            }
+        }
+
+        internal VirtualPath VirtualDirectoryObject {
+            get {
+                return _virtualDirectory;
+            }
+        }
+
+        internal void SetVirtualDirectory(VirtualPath virtualDirectory) {
+            _virtualDirectory = virtualDirectory;
+        }
+
+        //
+        // The physical directory.
+        //
+        public string PhysicalDirectory {
+            get {
+                return _physicalDirectory;
+            }
+
+            set {
+                string physicalDirectory = value;
+                if (String.IsNullOrEmpty(physicalDirectory)) {
+                    physicalDirectory = null;
+                }
+                else {
+                    // remove trailing '\' if any
+                    if (UrlPath.PathEndsWithExtraSlash(physicalDirectory)) {
+                        physicalDirectory = physicalDirectory.Substring(0, physicalDirectory.Length - 1);
+                    }
+
+                    // Throw if the resulting physical path is not canonical, to prevent potential
+                    // security issues (VSWhidbey 418125)
+                    if (FileUtil.IsSuspiciousPhysicalPath(physicalDirectory)) {
+                        throw ExceptionUtil.ParameterInvalid("PhysicalDirectory");
+                    }
+                }
+
+                _physicalDirectory = physicalDirectory;
+            }
+        }
+
+        //
+        // Indicates whether the virtual directory is the location of an application.
+        //
+        public bool IsAppRoot {
+            get {
+                return _isAppRoot;
+            }
+
+            set {
+                _isAppRoot = value;
+            }
+
+        }
+
+        //
+        // The base name of the config file.
+        // If not specified, "web.config" is used.
+        //
+        public string ConfigFileBaseName {
+            get {
+                return _configFileBaseName;
+            }
+
+            set {
+                if (string.IsNullOrEmpty(value)) {
+                    throw ExceptionUtil.PropertyInvalid("ConfigFileBaseName");
+                }
+
+                _configFileBaseName = value;
+            }
+        }
+
+        internal void Validate() {
+            if (_physicalDirectory != null) {
+                //
+                // Ensure that the caller has PathDiscovery to the resulting config file,
+                // and that the web.config file does not have ".." that could lead to a 
+                // different directory.
+                //
+                string configFilename = Path.Combine(_physicalDirectory, _configFileBaseName);
+                string fullConfigFilename = Path.GetFullPath(configFilename);
+                if (    Path.GetDirectoryName(fullConfigFilename) != _physicalDirectory ||
+                        Path.GetFileName(fullConfigFilename) != _configFileBaseName ||
+                        FileUtil.IsSuspiciousPhysicalPath(configFilename)) {
+
+                    throw ExceptionUtil.ParameterInvalid("configFileBaseName");
+                }
+            }
+        }
+    }
+}