Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Xml / System / Xml / XmlDownloadManager.cs / 1 / XmlDownloadManager.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml { using System; using System.IO; using System.Net; using System.Security; using System.Xml.Schema; using System.Collections; using System.Security.Policy; // // XmlDownloadManager // internal class XmlDownloadManager { Hashtable connections; internal Stream GetStream( Uri uri, ICredentials credentials ) { if ( uri.Scheme == "file" ) { return new FileStream( uri.LocalPath, FileMode.Open, FileAccess.Read, FileShare.Read, 1 ); } else { return GetNonFileStream( uri, credentials ); } } private Stream GetNonFileStream( Uri uri, ICredentials credentials ) { WebRequest req = WebRequest.Create( uri ); if ( credentials != null ) { req.Credentials = credentials; } WebResponse resp = req.GetResponse(); HttpWebRequest webReq = req as HttpWebRequest; if ( webReq != null ) { lock ( this ) { if ( connections == null ) { connections = new Hashtable(); } OpenedHost openedHost = (OpenedHost)connections[webReq.Address.Host]; if ( openedHost == null ) { openedHost = new OpenedHost(); } if ( openedHost.nonCachedConnectionsCount < webReq.ServicePoint.ConnectionLimit - 1 ) { // we are not close to connection limit -> don't cache the stream if ( openedHost.nonCachedConnectionsCount == 0 ) { connections.Add( webReq.Address.Host, openedHost ); } openedHost.nonCachedConnectionsCount++; return new XmlRegisteredNonCachedStream( resp.GetResponseStream(), this, webReq.Address.Host ); } else { // cache the stream and save the connection for the next request return new XmlCachedStream( resp.ResponseUri, resp.GetResponseStream() ); } } } else { return resp.GetResponseStream(); } } internal void Remove( string host ) { lock ( this ) { OpenedHost openedHost = (OpenedHost)connections[host]; if ( openedHost != null ) { if ( --openedHost.nonCachedConnectionsCount == 0 ) { connections.Remove( host ); } } } } } // // OpenedHost // internal class OpenedHost { internal int nonCachedConnectionsCount; } // // XmlRegisteredNonCachedStream // internal class XmlRegisteredNonCachedStream : Stream { protected Stream stream; XmlDownloadManager downloadManager; string host; internal XmlRegisteredNonCachedStream( Stream stream, XmlDownloadManager downloadManager, string host ) { this.stream = stream; this.downloadManager = downloadManager; this.host = host; } ~XmlRegisteredNonCachedStream() { if ( downloadManager != null ) { downloadManager.Remove( host ); } stream = null; // The base class, Stream, provides its own finalizer } protected override void Dispose( bool disposing ) { try { if ( disposing && stream != null ) { if ( downloadManager != null ) { downloadManager.Remove( host ); } stream.Close(); } stream = null; GC.SuppressFinalize( this ); // do not call finalizer } finally { base.Dispose( disposing ); } } // // Stream // public override IAsyncResult BeginRead( byte[] buffer, int offset, int count, AsyncCallback callback, object state ) { return stream.BeginRead( buffer, offset, count, callback, state ); } public override IAsyncResult BeginWrite( byte[] buffer, int offset, int count, AsyncCallback callback, object state ) { return BeginWrite( buffer, offset, count, callback, state ); } public override int EndRead( IAsyncResult asyncResult ) { return stream.EndRead( asyncResult ); } public override void EndWrite( IAsyncResult asyncResult ) { stream.EndWrite( asyncResult ); } public override void Flush() { stream.Flush(); } public override int Read( byte[] buffer, int offset, int count ) { return stream.Read( buffer, offset, count ); } public override int ReadByte() { return stream.ReadByte(); } public override long Seek( long offset, SeekOrigin origin ) { return stream.Seek( offset, origin ); } public override void SetLength( long value ) { stream.SetLength( value ); } public override void Write( byte[] buffer, int offset, int count ) { stream.Write( buffer, offset, count ); } public override void WriteByte( byte value ) { stream.WriteByte( value ); } public override Boolean CanRead { get { return stream.CanRead; } } public override Boolean CanSeek { get { return stream.CanSeek; } } public override Boolean CanWrite { get { return stream.CanWrite; } } public override long Length { get { return stream.Length; } } public override long Position { get { return stream.Position; } set { stream.Position = value; } } } // // XmlCachedStream // internal class XmlCachedStream : MemoryStream { private const int MoveBufferSize = 4096; private Uri uri; internal XmlCachedStream( Uri uri, Stream stream ) : base() { this.uri = uri; try { byte[] bytes = new byte[MoveBufferSize]; int read = 0; while ( ( read = stream.Read( bytes, 0, MoveBufferSize ) ) > 0 ) { this.Write( bytes, 0, read ); } base.Position = 0; } finally { stream.Close(); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml { using System; using System.IO; using System.Net; using System.Security; using System.Xml.Schema; using System.Collections; using System.Security.Policy; // // XmlDownloadManager // internal class XmlDownloadManager { Hashtable connections; internal Stream GetStream( Uri uri, ICredentials credentials ) { if ( uri.Scheme == "file" ) { return new FileStream( uri.LocalPath, FileMode.Open, FileAccess.Read, FileShare.Read, 1 ); } else { return GetNonFileStream( uri, credentials ); } } private Stream GetNonFileStream( Uri uri, ICredentials credentials ) { WebRequest req = WebRequest.Create( uri ); if ( credentials != null ) { req.Credentials = credentials; } WebResponse resp = req.GetResponse(); HttpWebRequest webReq = req as HttpWebRequest; if ( webReq != null ) { lock ( this ) { if ( connections == null ) { connections = new Hashtable(); } OpenedHost openedHost = (OpenedHost)connections[webReq.Address.Host]; if ( openedHost == null ) { openedHost = new OpenedHost(); } if ( openedHost.nonCachedConnectionsCount < webReq.ServicePoint.ConnectionLimit - 1 ) { // we are not close to connection limit -> don't cache the stream if ( openedHost.nonCachedConnectionsCount == 0 ) { connections.Add( webReq.Address.Host, openedHost ); } openedHost.nonCachedConnectionsCount++; return new XmlRegisteredNonCachedStream( resp.GetResponseStream(), this, webReq.Address.Host ); } else { // cache the stream and save the connection for the next request return new XmlCachedStream( resp.ResponseUri, resp.GetResponseStream() ); } } } else { return resp.GetResponseStream(); } } internal void Remove( string host ) { lock ( this ) { OpenedHost openedHost = (OpenedHost)connections[host]; if ( openedHost != null ) { if ( --openedHost.nonCachedConnectionsCount == 0 ) { connections.Remove( host ); } } } } } // // OpenedHost // internal class OpenedHost { internal int nonCachedConnectionsCount; } // // XmlRegisteredNonCachedStream // internal class XmlRegisteredNonCachedStream : Stream { protected Stream stream; XmlDownloadManager downloadManager; string host; internal XmlRegisteredNonCachedStream( Stream stream, XmlDownloadManager downloadManager, string host ) { this.stream = stream; this.downloadManager = downloadManager; this.host = host; } ~XmlRegisteredNonCachedStream() { if ( downloadManager != null ) { downloadManager.Remove( host ); } stream = null; // The base class, Stream, provides its own finalizer } protected override void Dispose( bool disposing ) { try { if ( disposing && stream != null ) { if ( downloadManager != null ) { downloadManager.Remove( host ); } stream.Close(); } stream = null; GC.SuppressFinalize( this ); // do not call finalizer } finally { base.Dispose( disposing ); } } // // Stream // public override IAsyncResult BeginRead( byte[] buffer, int offset, int count, AsyncCallback callback, object state ) { return stream.BeginRead( buffer, offset, count, callback, state ); } public override IAsyncResult BeginWrite( byte[] buffer, int offset, int count, AsyncCallback callback, object state ) { return BeginWrite( buffer, offset, count, callback, state ); } public override int EndRead( IAsyncResult asyncResult ) { return stream.EndRead( asyncResult ); } public override void EndWrite( IAsyncResult asyncResult ) { stream.EndWrite( asyncResult ); } public override void Flush() { stream.Flush(); } public override int Read( byte[] buffer, int offset, int count ) { return stream.Read( buffer, offset, count ); } public override int ReadByte() { return stream.ReadByte(); } public override long Seek( long offset, SeekOrigin origin ) { return stream.Seek( offset, origin ); } public override void SetLength( long value ) { stream.SetLength( value ); } public override void Write( byte[] buffer, int offset, int count ) { stream.Write( buffer, offset, count ); } public override void WriteByte( byte value ) { stream.WriteByte( value ); } public override Boolean CanRead { get { return stream.CanRead; } } public override Boolean CanSeek { get { return stream.CanSeek; } } public override Boolean CanWrite { get { return stream.CanWrite; } } public override long Length { get { return stream.Length; } } public override long Position { get { return stream.Position; } set { stream.Position = value; } } } // // XmlCachedStream // internal class XmlCachedStream : MemoryStream { private const int MoveBufferSize = 4096; private Uri uri; internal XmlCachedStream( Uri uri, Stream stream ) : base() { this.uri = uri; try { byte[] bytes = new byte[MoveBufferSize]; int read = 0; while ( ( read = stream.Read( bytes, 0, MoveBufferSize ) ) > 0 ) { this.Write( bytes, 0, read ); } base.Position = 0; } finally { stream.Close(); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- InputLanguageProfileNotifySink.cs
- Int16AnimationBase.cs
- RegexCompilationInfo.cs
- DbParameterCollectionHelper.cs
- SoapAttributeAttribute.cs
- DataGridDetailsPresenter.cs
- XmlSchemaNotation.cs
- ADMembershipUser.cs
- Base64Encoder.cs
- Base64Encoder.cs
- Serializer.cs
- Label.cs
- DependsOnAttribute.cs
- QilInvokeEarlyBound.cs
- RightsManagementEncryptedStream.cs
- _AutoWebProxyScriptEngine.cs
- SqlDataSourceStatusEventArgs.cs
- ComboBox.cs
- InputEventArgs.cs
- MimeFormReflector.cs
- SQLDecimal.cs
- LateBoundChannelParameterCollection.cs
- FacetDescriptionElement.cs
- CodeCommentStatement.cs
- ClientSettingsSection.cs
- EmissiveMaterial.cs
- WebPart.cs
- StaticDataManager.cs
- BitmapEffectGroup.cs
- PolyQuadraticBezierSegmentFigureLogic.cs
- IResourceProvider.cs
- EncryptedPackageFilter.cs
- XamlParser.cs
- TreeWalkHelper.cs
- VirtualizingPanel.cs
- FixUp.cs
- Membership.cs
- TreeNodeBinding.cs
- SqlFileStream.cs
- NonClientArea.cs
- SqlDataRecord.cs
- GenericArgumentsUpdater.cs
- Int16.cs
- FunctionDetailsReader.cs
- InputElement.cs
- FixedTextView.cs
- GeometryGroup.cs
- DefaultExpressionVisitor.cs
- HostedNamedPipeTransportManager.cs
- _LazyAsyncResult.cs
- Stylus.cs
- BrushConverter.cs
- AtlasWeb.Designer.cs
- EntityCommand.cs
- BasicExpressionVisitor.cs
- ObjectDataSourceDisposingEventArgs.cs
- Function.cs
- RootNamespaceAttribute.cs
- SingleAnimation.cs
- DBCommandBuilder.cs
- XmlNamespaceMappingCollection.cs
- ValidationSummary.cs
- RelationshipSet.cs
- HttpWebRequestElement.cs
- Expressions.cs
- HttpProfileBase.cs
- MultiPageTextView.cs
- MediaContextNotificationWindow.cs
- BaseCodePageEncoding.cs
- Rfc2898DeriveBytes.cs
- SystemIcmpV4Statistics.cs
- DbExpressionRules.cs
- SqlNotificationEventArgs.cs
- MeshGeometry3D.cs
- TdsValueSetter.cs
- SelectionWordBreaker.cs
- CacheDependency.cs
- EndOfStreamException.cs
- ContentPlaceHolder.cs
- UnsafeNativeMethods.cs
- X509SecurityTokenAuthenticator.cs
- PixelFormat.cs
- SymbolMethod.cs
- Guid.cs
- PaperSource.cs
- DbParameterHelper.cs
- SQLDecimalStorage.cs
- WebPartConnectionsDisconnectVerb.cs
- StyleTypedPropertyAttribute.cs
- EncoderExceptionFallback.cs
- UIElement.cs
- DoWorkEventArgs.cs
- CompositeKey.cs
- AccessibilityHelperForVista.cs
- AnnotationAuthorChangedEventArgs.cs
- NameValuePair.cs
- LinkedList.cs
- TableLayoutCellPaintEventArgs.cs
- KeysConverter.cs
- Multiply.cs