Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Core / CSharp / System / IO / Packaging / PackageStore.cs / 1 / PackageStore.cs
//------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation, 2005 // // File: PackageStore.cs // // Description: Collection of packages to be used with PackWebRequest. // // History: // 07/25/2005: YoungGK: Created. //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Specialized; using System.IO; using System.IO.Packaging; using System.Security; using System.Security.Permissions; using System.Windows.Navigation; using MS.Internal.PresentationCore; // for ExceptionStringTable namespace System.IO.Packaging { // Note: we purposely didn't make this class a dictionary to limit the access // to the packages in the store // ////// PackageStore: Collection of packages to be used with PackWebRequest. /// PackWebRequest will use a package from PackageStore if package uri matches /// to obtain the requested part stream /// This mechanism can be used so that PackWebRequest wouldn't open a package /// multiple times to load different resources from the same package. /// ////// Note: Packages placed in PackageStore can be used in multi threading environment if it is used in /// conjunction with Xaml Parser (XmlReader.Load). It is up to an application to do proper locking on the package /// when it accesses the package directly. /// Note: The access to the packages obtained from PackageStore is not limited (or the access level is same /// as the one that is used to do open). It is up to an application to do proper action in modifying or closing /// packages. /// ////// Critical: This class serves as a deposity of packages to be re-used with PackWebRequest /// This affects where we load resources. This class is marked as SecurityCritical /// to ensure that: /// 1. No PT code can add/get/remove custom type of Package since the platform code (PackWebRequest) will /// execute the custom Package (untrusted code) /// 2. Allow PT code to add/get/remove only the well-known platform Package type (trusted code): ZipPackage /// TreatAsSafe: These are public methods. /// [SecurityCritical(SecurityCriticalScope.Everything)] public static class PackageStore { static PackageStore() { _globalLock = new Object(); } #region public Methods // ////// Retrieves a package from the store for the given Uri. /// /// key uri ///Package ////// /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation on custom type of Package. /// public static Package GetPackage(Uri uri) { ValidatePackageUri(uri); lock (_globalLock) { Package package = null; if (_packages != null && _packages.Contains(uri)) { package = (Package) _packages[uri]; DemandSecurityPermissionIfCustomPackage(package); } return package; } } ////// Adds a uri, package pair to the package store. /// /// key uri /// package ////// /// If a package with the uri is already in the store,it throws an exception. /// The package will not be automatically replaced within the store. /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation. However, Partially Trusted callers can still /// add well-known platform Package type (ZipPackage) to PackageStore. /// the application's PackageStore. /// public static void AddPackage(Uri uri, Package package) { // Allow well known platform Package to be added into PackageStore under Partial Trust. // Otherwise, demand Environment Permission to make sure only Full Trust app can add a custom Package DemandSecurityPermissionIfCustomPackage(package); ValidatePackageUri(uri); // There are well-known package types that are only for internal use (for resource loading) // (i.e. ResourceContainer - "application://" and SiteOriginContainer - "siteoforigin://" // Adding packages with such key uri will have no effect on PackWebRequest since // they cannot be overriden. So, calling this method with such key Uris should be prevented // However, uri.Equal cannot be used here since the key Uris are used as a pack Uri form and // only PackUriHelper.ComparePackUri can do the proper comparison of pack Uris. Uri packUri = PackUriHelper.Create(uri); if (PackUriHelper.ComparePackUri(packUri, BaseUriHelper.PackAppBaseUri) == 0 || PackUriHelper.ComparePackUri(packUri, BaseUriHelper.SiteOfOriginBaseUri) == 0) { throw new ArgumentException(SR.Get(SRID.NotAllowedPackageUri), "uri"); } if (package == null) { throw new ArgumentNullException("package"); } lock (_globalLock) { if (_packages == null) { _packages = new HybridDictionary(2); } if (_packages.Contains(uri)) { throw new InvalidOperationException(SR.Get(SRID.PackageAlreadyExists)); } _packages.Add(uri, package); } } ////// Removes a uri, package pair from the package store. /// /// key uri ////// /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation on custom type of Package. /// public static void RemovePackage(Uri uri) { ValidatePackageUri(uri); lock (_globalLock) { if (_packages != null) { DemandSecurityPermissionIfCustomPackage((Package) _packages[uri]); // If the key doesn't exist, it is no op _packages.Remove(uri); } } } #endregion Public Methods #region Private Methods private static void ValidatePackageUri(Uri uri) { if (uri == null) { throw new ArgumentNullException("uri"); } if (!uri.IsAbsoluteUri) { throw new ArgumentException(SR.Get(SRID.UriMustBeAbsolute), "uri"); } } private static void DemandSecurityPermissionIfCustomPackage(Package package) { // Although ZipPackage is sealed and cannot be subclassed, we shouldn't depend on // the "sealedness" of ZipPackage. Checking the object type is more reliable way // than using "as" or "is" operator. if (package != null && package.GetType() != typeof(ZipPackage)) { SecurityHelper.DemandEnvironmentPermission(); } } #endregion Private Methods #region Private Fields // We expect to have no more than 10 packages in the store // per AppDomain for our scenarios // ListDictionary is the best fit for this scenarios; otherwise we should be using // Hashtable. HybridDictionary already has functionality of switching between // ListDictionary and Hashtable depending on the size of the collection static private HybridDictionary _packages; static private Object _globalLock; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation, 2005 // // File: PackageStore.cs // // Description: Collection of packages to be used with PackWebRequest. // // History: // 07/25/2005: YoungGK: Created. //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Specialized; using System.IO; using System.IO.Packaging; using System.Security; using System.Security.Permissions; using System.Windows.Navigation; using MS.Internal.PresentationCore; // for ExceptionStringTable namespace System.IO.Packaging { // Note: we purposely didn't make this class a dictionary to limit the access // to the packages in the store // ////// PackageStore: Collection of packages to be used with PackWebRequest. /// PackWebRequest will use a package from PackageStore if package uri matches /// to obtain the requested part stream /// This mechanism can be used so that PackWebRequest wouldn't open a package /// multiple times to load different resources from the same package. /// ////// Note: Packages placed in PackageStore can be used in multi threading environment if it is used in /// conjunction with Xaml Parser (XmlReader.Load). It is up to an application to do proper locking on the package /// when it accesses the package directly. /// Note: The access to the packages obtained from PackageStore is not limited (or the access level is same /// as the one that is used to do open). It is up to an application to do proper action in modifying or closing /// packages. /// ////// Critical: This class serves as a deposity of packages to be re-used with PackWebRequest /// This affects where we load resources. This class is marked as SecurityCritical /// to ensure that: /// 1. No PT code can add/get/remove custom type of Package since the platform code (PackWebRequest) will /// execute the custom Package (untrusted code) /// 2. Allow PT code to add/get/remove only the well-known platform Package type (trusted code): ZipPackage /// TreatAsSafe: These are public methods. /// [SecurityCritical(SecurityCriticalScope.Everything)] public static class PackageStore { static PackageStore() { _globalLock = new Object(); } #region public Methods // ////// Retrieves a package from the store for the given Uri. /// /// key uri ///Package ////// /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation on custom type of Package. /// public static Package GetPackage(Uri uri) { ValidatePackageUri(uri); lock (_globalLock) { Package package = null; if (_packages != null && _packages.Contains(uri)) { package = (Package) _packages[uri]; DemandSecurityPermissionIfCustomPackage(package); } return package; } } ////// Adds a uri, package pair to the package store. /// /// key uri /// package ////// /// If a package with the uri is already in the store,it throws an exception. /// The package will not be automatically replaced within the store. /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation. However, Partially Trusted callers can still /// add well-known platform Package type (ZipPackage) to PackageStore. /// the application's PackageStore. /// public static void AddPackage(Uri uri, Package package) { // Allow well known platform Package to be added into PackageStore under Partial Trust. // Otherwise, demand Environment Permission to make sure only Full Trust app can add a custom Package DemandSecurityPermissionIfCustomPackage(package); ValidatePackageUri(uri); // There are well-known package types that are only for internal use (for resource loading) // (i.e. ResourceContainer - "application://" and SiteOriginContainer - "siteoforigin://" // Adding packages with such key uri will have no effect on PackWebRequest since // they cannot be overriden. So, calling this method with such key Uris should be prevented // However, uri.Equal cannot be used here since the key Uris are used as a pack Uri form and // only PackUriHelper.ComparePackUri can do the proper comparison of pack Uris. Uri packUri = PackUriHelper.Create(uri); if (PackUriHelper.ComparePackUri(packUri, BaseUriHelper.PackAppBaseUri) == 0 || PackUriHelper.ComparePackUri(packUri, BaseUriHelper.SiteOfOriginBaseUri) == 0) { throw new ArgumentException(SR.Get(SRID.NotAllowedPackageUri), "uri"); } if (package == null) { throw new ArgumentNullException("package"); } lock (_globalLock) { if (_packages == null) { _packages = new HybridDictionary(2); } if (_packages.Contains(uri)) { throw new InvalidOperationException(SR.Get(SRID.PackageAlreadyExists)); } _packages.Add(uri, package); } } ////// Removes a uri, package pair from the package store. /// /// key uri ////// /// ////// Demands EnvironmentPermission() if package is custom type of Package. /// This prevents Partially Trusted callers from performing this operation on custom type of Package. /// public static void RemovePackage(Uri uri) { ValidatePackageUri(uri); lock (_globalLock) { if (_packages != null) { DemandSecurityPermissionIfCustomPackage((Package) _packages[uri]); // If the key doesn't exist, it is no op _packages.Remove(uri); } } } #endregion Public Methods #region Private Methods private static void ValidatePackageUri(Uri uri) { if (uri == null) { throw new ArgumentNullException("uri"); } if (!uri.IsAbsoluteUri) { throw new ArgumentException(SR.Get(SRID.UriMustBeAbsolute), "uri"); } } private static void DemandSecurityPermissionIfCustomPackage(Package package) { // Although ZipPackage is sealed and cannot be subclassed, we shouldn't depend on // the "sealedness" of ZipPackage. Checking the object type is more reliable way // than using "as" or "is" operator. if (package != null && package.GetType() != typeof(ZipPackage)) { SecurityHelper.DemandEnvironmentPermission(); } } #endregion Private Methods #region Private Fields // We expect to have no more than 10 packages in the store // per AppDomain for our scenarios // ListDictionary is the best fit for this scenarios; otherwise we should be using // Hashtable. HybridDictionary already has functionality of switching between // ListDictionary and Hashtable depending on the size of the collection static private HybridDictionary _packages; static private Object _globalLock; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ListViewItem.cs
- EdmToObjectNamespaceMap.cs
- RemoteDebugger.cs
- AdornerLayer.cs
- AssociatedControlConverter.cs
- GPRECTF.cs
- LinkDescriptor.cs
- SafeHGlobalHandleCritical.cs
- EmbeddedMailObject.cs
- EdmItemError.cs
- FlowDocumentReader.cs
- ObjectSpanRewriter.cs
- TextEmbeddedObject.cs
- PointAnimationUsingPath.cs
- ISSmlParser.cs
- ImageMapEventArgs.cs
- ReadOnlyPropertyMetadata.cs
- Schema.cs
- ForEachAction.cs
- XmlDocumentType.cs
- XmlSignatureProperties.cs
- DataGridTablesFactory.cs
- XhtmlBasicPhoneCallAdapter.cs
- EntityDataSourceWizardForm.cs
- ClaimSet.cs
- LessThan.cs
- CaseInsensitiveHashCodeProvider.cs
- ToolStripOverflowButton.cs
- LicenseContext.cs
- SortedList.cs
- ScriptBehaviorDescriptor.cs
- BasePattern.cs
- TextEditorSpelling.cs
- ContentElement.cs
- HttpCapabilitiesEvaluator.cs
- UnauthorizedWebPart.cs
- SQLDoubleStorage.cs
- BufferManager.cs
- ProfileSettingsCollection.cs
- PeerOutputChannel.cs
- Pair.cs
- EventPropertyMap.cs
- relpropertyhelper.cs
- OleDbRowUpdatedEvent.cs
- Cursor.cs
- DebugView.cs
- _SingleItemRequestCache.cs
- DataServiceRequestOfT.cs
- NonParentingControl.cs
- WMIGenerator.cs
- ContentPosition.cs
- TextMarkerSource.cs
- WsdlBuildProvider.cs
- AsyncCodeActivity.cs
- LogicalChannel.cs
- CompiledQuery.cs
- PageAsyncTaskManager.cs
- ReliableOutputConnection.cs
- RuleSettings.cs
- StringSource.cs
- Utility.cs
- SymbolType.cs
- FacetValueContainer.cs
- TerminatorSinks.cs
- DataGridViewCellParsingEventArgs.cs
- UdpTransportSettings.cs
- DoubleIndependentAnimationStorage.cs
- SerializationTrace.cs
- RootBrowserWindowAutomationPeer.cs
- CollectionBase.cs
- SafeEventHandle.cs
- MediaCommands.cs
- SoundPlayerAction.cs
- ControlEvent.cs
- Soap12ProtocolReflector.cs
- UserControlCodeDomTreeGenerator.cs
- CodeTypeReferenceExpression.cs
- ProfileInfo.cs
- VSWCFServiceContractGenerator.cs
- UserControl.cs
- MenuDesigner.cs
- ImageListUtils.cs
- CompilerCollection.cs
- CreateUserWizardStep.cs
- AutomationProperties.cs
- GroupItemAutomationPeer.cs
- MeasureItemEvent.cs
- WebControlsSection.cs
- RegisteredScript.cs
- PolyBezierSegment.cs
- InfoCardBinaryReader.cs
- RijndaelManaged.cs
- ScrollPattern.cs
- BuildProviderCollection.cs
- SamlAction.cs
- OdbcParameter.cs
- BitmapScalingModeValidation.cs
- StringAnimationBase.cs
- ObjectStateFormatter.cs
- Empty.cs