Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / filewebresponse.cs / 1 / filewebresponse.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net { using System.Runtime.Serialization; using System.IO; using System.Globalization; using System.Security.Permissions; [Serializable] public class FileWebResponse : WebResponse, ISerializable, ICloseEx { const int DefaultFileStreamBufferSize = 8192; const string DefaultFileContentType = "application/octet-stream"; // fields bool m_closed; long m_contentLength; FileAccess m_fileAccess; WebHeaderCollection m_headers; Stream m_stream; Uri m_uri; // constructors internal FileWebResponse(FileWebRequest request, Uri uri, FileAccess access, bool asyncHint) { GlobalLog.Enter("FileWebResponse::FileWebResponse", "uri="+uri+", access="+access+", asyncHint="+asyncHint); try { m_fileAccess = access; if (access == FileAccess.Write) { m_stream = Stream.Null; } else { // // apparently, specifying async when the stream will be read // synchronously, or vice versa, can lead to a 10x perf hit. // While we don't know how the app will read the stream, we // use the hint from whether the app called BeginGetResponse // or GetResponse to supply the async flag to the stream ctor // m_stream = new FileWebStream(request, uri.LocalPath, FileMode.Open, FileAccess.Read, FileShare.Read, DefaultFileStreamBufferSize, asyncHint ); m_contentLength = m_stream.Length; } m_headers = new WebHeaderCollection(WebHeaderCollectionType.FileWebResponse); m_headers.AddInternal(HttpKnownHeaderNames.ContentLength, m_contentLength.ToString(NumberFormatInfo.InvariantInfo)); m_headers.AddInternal(HttpKnownHeaderNames.ContentType, DefaultFileContentType); m_uri = uri; } catch (Exception e) { Exception ex = new WebException(e.Message, e, WebExceptionStatus.ConnectFailure, null); GlobalLog.LeaveException("FileWebResponse::FileWebResponse", ex); throw ex; } catch { Exception ex = new WebException(string.Empty, new Exception(SR.GetString(SR.net_nonClsCompliantException)), WebExceptionStatus.ConnectFailure, null); GlobalLog.LeaveException("FileWebResponse::FileWebResponse", ex); throw ex; } GlobalLog.Leave("FileWebResponse::FileWebResponse"); } // // ISerializable constructor // [Obsolete("Serialization is obsoleted for this type. http://go.microsoft.com/fwlink/?linkid=14202")] protected FileWebResponse(SerializationInfo serializationInfo, StreamingContext streamingContext):base(serializationInfo, streamingContext) { m_headers = (WebHeaderCollection)serializationInfo.GetValue("headers", typeof(WebHeaderCollection)); m_uri = (Uri)serializationInfo.GetValue("uri", typeof(Uri)); m_contentLength = serializationInfo.GetInt64("contentLength"); m_fileAccess = (FileAccess )serializationInfo.GetInt32("fileAccess"); } // // ISerializable method // ///[SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter, SerializationFormatter=true)] void ISerializable.GetObjectData(SerializationInfo serializationInfo, StreamingContext streamingContext) { GetObjectData(serializationInfo, streamingContext); } // // FxCop: provide some way for derived classes to access GetObjectData even if the derived class // explicitly re-inherits ISerializable. // [SecurityPermission(SecurityAction.Demand, SerializationFormatter=true)] protected override void GetObjectData(SerializationInfo serializationInfo, StreamingContext streamingContext) { serializationInfo.AddValue("headers", m_headers, typeof(WebHeaderCollection)); serializationInfo.AddValue("uri", m_uri, typeof(Uri)); serializationInfo.AddValue("contentLength", m_contentLength); serializationInfo.AddValue("fileAccess", m_fileAccess); base.GetObjectData(serializationInfo, streamingContext); } // properties public override long ContentLength { get { CheckDisposed(); return m_contentLength; } } public override string ContentType { get { CheckDisposed(); return DefaultFileContentType; } } public override WebHeaderCollection Headers { get { CheckDisposed(); return m_headers; } } public override Uri ResponseUri { get { CheckDisposed(); return m_uri; } } // methods private void CheckDisposed() { if (m_closed) { throw new ObjectDisposedException(this.GetType().FullName); } } public override void Close() { ((ICloseEx)this).CloseEx(CloseExState.Normal); } void ICloseEx.CloseEx(CloseExState closeState) { GlobalLog.Enter("FileWebResponse::Close()"); try { if (!m_closed) { m_closed = true; Stream chkStream = m_stream; if (chkStream!=null) { if (chkStream is ICloseEx) ((ICloseEx)chkStream).CloseEx(closeState); else chkStream.Close(); m_stream = null; } } } finally { GlobalLog.Leave("FileWebResponse::Close()"); } } public override Stream GetResponseStream() { GlobalLog.Enter("FileWebResponse::GetResponseStream()"); try { CheckDisposed(); } finally { GlobalLog.Leave("FileWebResponse::GetResponseStream()"); } return m_stream; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- BaseServiceProvider.cs
- Pointer.cs
- RegexStringValidator.cs
- QueryOpeningEnumerator.cs
- HelpEvent.cs
- NoPersistScope.cs
- DPAPIProtectedConfigurationProvider.cs
- NetworkInterface.cs
- IndicShape.cs
- HealthMonitoringSection.cs
- HelpProvider.cs
- MetadataCollection.cs
- WorkerRequest.cs
- _NativeSSPI.cs
- Control.cs
- PageCatalogPart.cs
- XamlInterfaces.cs
- TimeSpanConverter.cs
- PageThemeBuildProvider.cs
- IPipelineRuntime.cs
- TextDecorations.cs
- MenuCommandService.cs
- GridViewRowEventArgs.cs
- RectangleGeometry.cs
- GPPOINT.cs
- TraceListener.cs
- UInt32.cs
- WindowsTab.cs
- Types.cs
- TemplateControlParser.cs
- CatalogPartDesigner.cs
- EntityStoreSchemaGenerator.cs
- AnimationStorage.cs
- ClientCultureInfo.cs
- CollectionAdapters.cs
- TransactionValidationBehavior.cs
- AutomationPatternInfo.cs
- NameValueCollection.cs
- CacheManager.cs
- ServiceContractViewControl.cs
- SoapSchemaExporter.cs
- DispatcherHookEventArgs.cs
- AddInController.cs
- ThicknessAnimationUsingKeyFrames.cs
- x509store.cs
- DSACryptoServiceProvider.cs
- assertwrapper.cs
- SafeWaitHandle.cs
- LinkArea.cs
- DesignRelationCollection.cs
- UpdateException.cs
- TypeExtensionConverter.cs
- TextSearch.cs
- DecoderNLS.cs
- HostExecutionContextManager.cs
- ResourceProperty.cs
- XmlSchemaCollection.cs
- QuotedStringFormatReader.cs
- QilStrConcat.cs
- TransportConfigurationTypeElement.cs
- TrustLevelCollection.cs
- CompareInfo.cs
- BaseCAMarshaler.cs
- ExpressionBinding.cs
- MgmtConfigurationRecord.cs
- DataProtectionSecurityStateEncoder.cs
- BufferBuilder.cs
- PropertyMappingExceptionEventArgs.cs
- InheritanceContextChangedEventManager.cs
- EventLogPermission.cs
- PersonalizationStateInfoCollection.cs
- XmlArrayItemAttribute.cs
- BooleanSwitch.cs
- ArrangedElement.cs
- KeyPressEvent.cs
- VectorAnimation.cs
- PackageRelationship.cs
- SqlDataSourceEnumerator.cs
- Zone.cs
- InfoCardTrace.cs
- XmlObjectSerializerReadContextComplexJson.cs
- HtmlGenericControl.cs
- ExeContext.cs
- ReturnValue.cs
- ShellProvider.cs
- UriSectionData.cs
- ToolStripContentPanel.cs
- AssociatedControlConverter.cs
- HtmlAnchor.cs
- OutputCacheSection.cs
- ListViewGroupCollectionEditor.cs
- PolyLineSegmentFigureLogic.cs
- WsiProfilesElement.cs
- Timer.cs
- PropertyToken.cs
- SelectionWordBreaker.cs
- TimeSpanOrInfiniteConverter.cs
- WorkflowRuntime.cs
- WebRequest.cs
- BinaryFormatterWriter.cs