Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,113 @@
+//------------------------------------------------------------------------------
+// <copyright file="HandlerFactoryCache.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+/*
+ * Config related classes for HttpApplication
+ */
+
+namespace System.Web.Configuration {
+
+    using System;
+    using System.Configuration;
+    using System.Web.Compilation;
+    using System.Security;
+    using System.Security.Permissions;
+
+    /*
+     * An object to cache a factory
+     */
+    internal class HandlerFactoryCache {
+        private IHttpHandlerFactory _factory;
+
+        internal HandlerFactoryCache(string type) {
+            Object instance = Create(type);
+
+            // make sure it is either handler or handler factory
+
+            if (instance is IHttpHandler) {
+                // create bogus factory around it
+                _factory = new HandlerFactoryWrapper((IHttpHandler)instance, GetHandlerType(type));
+            }
+            else if (instance is IHttpHandlerFactory) {
+                _factory = (IHttpHandlerFactory)instance;
+            }
+            else {
+                throw new HttpException(SR.GetString(SR.Type_not_factory_or_handler, instance.GetType().FullName));
+            }
+        }
+
+        internal HandlerFactoryCache(HttpHandlerAction mapping) {
+            Object instance = mapping.Create();
+
+            // make sure it is either handler or handler factory
+
+            if (instance is IHttpHandler) {
+                // create bogus factory around it
+                _factory = new HandlerFactoryWrapper((IHttpHandler)instance, GetHandlerType(mapping));
+            }
+            else if (instance is IHttpHandlerFactory) {
+                _factory = (IHttpHandlerFactory)instance;
+            }
+            else {
+                throw new HttpException(SR.GetString(SR.Type_not_factory_or_handler, instance.GetType().FullName));
+            }
+        }
+
+        internal IHttpHandlerFactory Factory {
+            get {
+                return _factory;
+            }
+        }
+
+        // Dev10 732000: In a homogenous AppDomain, it is necessary to assert FileIoPermission to load types outside
+        // the AppDomain's grant set.
+        [FileIOPermission(SecurityAction.Assert, AllFiles = FileIOPermissionAccess.Read | FileIOPermissionAccess.PathDiscovery)]
+        private Type GetTypeWithAssert(string type) {
+            return BuildManager.GetType(type, throwOnError: true, ignoreCase: false);
+        }
+
+        internal Type GetHandlerType( HttpHandlerAction handlerAction ) {
+            // HACKHACK: for now, let uncreatable types through and error later (for .soap factory)
+            // This design should change - developers will want to know immediately
+            // when they misspell a type
+
+            Type t = GetTypeWithAssert(handlerAction.Type);
+
+            // throw for bad types in deferred case
+            if (!ConfigUtil.IsTypeHandlerOrFactory(t))
+                throw new ConfigurationErrorsException(SR.GetString(SR.Type_not_factory_or_handler, handlerAction.Type),
+                    handlerAction.ElementInformation.Source, handlerAction.ElementInformation.LineNumber);
+
+            return t;
+
+        }
+
+        internal Type GetHandlerType(string type) {
+            // HACKHACK: for now, let uncreatable types through and error later (for .soap factory)
+            // This design should change - developers will want to know immediately
+            // when they misspell a type
+
+            Type t = GetTypeWithAssert(type);
+
+            HttpRuntime.FailIfNoAPTCABit(t, null, null);
+
+            // throw for bad types in deferred case
+            if (!ConfigUtil.IsTypeHandlerOrFactory(t))
+                throw new ConfigurationErrorsException(SR.GetString(SR.Type_not_factory_or_handler, type));
+
+            return t;
+
+        }
+
+        internal object Create(string type) {
+            // HACKHACK: for now, let uncreatable types through and error later (for .soap factory)
+            // This design should change - developers will want to know immediately
+            // when they misspell a type
+
+            return HttpRuntime.CreateNonPublicInstance(GetHandlerType(type));
+        }
+    }
+}