HandlerFactoryCache.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Configuration / HandlerFactoryCache.cs / 1305376 / HandlerFactoryCache.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 * 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));
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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