Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / AppModel / SiteOfOriginPart.cs / 1305600 / SiteOfOriginPart.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // SiteOfOriginPart is an implementation of the abstract PackagePart class. It contains an override for GetStreamCore. // // History: // 6/16/2005: [....] - Initial creation. // //----------------------------------------------------------------------------- using System; using System.Net; using System.IO.Packaging; using System.Windows; using System.Windows.Navigation; using System.Windows.Resources; using System.IO; using System.Resources; using System.Globalization; using MS.Internal.PresentationCore; namespace MS.Internal.AppModel { ////// SiteOfOriginPart is an implementation of the abstract PackagePart class. It contains an override for GetStreamCore. /// internal class SiteOfOriginPart : System.IO.Packaging.PackagePart { //----------------------------------------------------- // // Public Constructors // //----------------------------------------------------- #region Public Constructors internal SiteOfOriginPart(Package container, Uri uri) : base(container, uri) { } #endregion //------------------------------------------------------ // // Protected Methods // //----------------------------------------------------- #region Protected Methods protected override Stream GetStreamCore(FileMode mode, FileAccess access) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Getting stream."); #endif return GetStreamAndSetContentType(false); } protected override string GetContentTypeCore() { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Getting content type."); #endif GetStreamAndSetContentType(true); return _contentType.ToString(); } #endregion //------------------------------------------------------ // // Private Methods // //------------------------------------------------------ #region Private Methods private Stream GetStreamAndSetContentType(bool onlyNeedContentType) { lock (_globalLock) { if (onlyNeedContentType && _contentType != MS.Internal.ContentType.Empty) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Getting content type and using previously determined value"); #endif return null; } // If GetContentTypeCore is called before GetStream() // then we need to retrieve the stream to get the mime type. // That stream is then stored as _cacheStream and returned // the next time GetStreamCore() is called. if (_cacheStream != null) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + "SiteOfOriginPart: Using Cached stream"); #endif Stream temp = _cacheStream; _cacheStream = null; return temp; } if (_absoluteLocation == null) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Determining absolute uri for this resource"); #endif string original = Uri.ToString(); Invariant.Assert(original[0] == '/'); string uriMinusInitialSlash = original.Substring(1); // trim leading '/' _absoluteLocation = new Uri(SiteOfOriginContainer.SiteOfOrigin, uriMinusInitialSlash); } #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Making web request to " + _absoluteLocation); #endif // For performance reasons it is better to open local files directly // rather than make a FileWebRequest. Stream responseStream; if (SecurityHelper.AreStringTypesEqual(_absoluteLocation.Scheme, Uri.UriSchemeFile)) { responseStream = HandleFileSource(onlyNeedContentType); } else { responseStream = HandleWebSource(onlyNeedContentType); } return responseStream; } } private Stream HandleFileSource(bool onlyNeedContentType) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": Opening local file " + _absoluteLocation); #endif if (_contentType == MS.Internal.ContentType.Empty) { _contentType = MS.Internal.MimeTypeMapper.GetMimeTypeFromUri(Uri); } if (!onlyNeedContentType) { return File.OpenRead(_absoluteLocation.LocalPath); } return null; } private Stream HandleWebSource(bool onlyNeedContentType) { WebResponse response = WpfWebRequestHelper.CreateRequestAndGetResponse(_absoluteLocation); Stream responseStream = response.GetResponseStream(); #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": Successfully retrieved stream from " + _absoluteLocation); #endif if (_contentType == MS.Internal.ContentType.Empty) { #if DEBUG if (SiteOfOriginContainer._traceSwitch.Enabled) System.Diagnostics.Trace.TraceInformation( DateTime.Now.ToLongTimeString() + " " + DateTime.Now.Millisecond + " " + System.Threading.Thread.CurrentThread.ManagedThreadId + ": SiteOfOriginPart: Setting _contentType"); #endif _contentType = WpfWebRequestHelper.GetContentType(response); } if (onlyNeedContentType) { _cacheStream = responseStream; } return responseStream; } #endregion //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Members Uri _absoluteLocation = null; ContentType _contentType = MS.Internal.ContentType.Empty; Stream _cacheStream = null; private Object _globalLock = new Object(); #endregion Private Members } } // 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
- SqlDataSourceConfigureSelectPanel.cs
- PrintDialog.cs
- ListBoxChrome.cs
- ItemChangedEventArgs.cs
- Image.cs
- DeviceContext2.cs
- StrokeIntersection.cs
- UserControlCodeDomTreeGenerator.cs
- BuildProvider.cs
- BamlWriter.cs
- EventLogTraceListener.cs
- EnlistmentTraceIdentifier.cs
- DataServiceQuery.cs
- GridViewUpdatedEventArgs.cs
- StatusStrip.cs
- FixedPage.cs
- AdobeCFFWrapper.cs
- DependentList.cs
- WebPartHeaderCloseVerb.cs
- SqlServer2KCompatibilityCheck.cs
- WindowsFormsHelpers.cs
- UrlMappingsModule.cs
- ListItemCollection.cs
- AppendHelper.cs
- RadialGradientBrush.cs
- DecimalConverter.cs
- MessageTraceRecord.cs
- Rotation3DKeyFrameCollection.cs
- ConfigXmlCDataSection.cs
- RelationshipNavigation.cs
- XamlVector3DCollectionSerializer.cs
- RemotingConfiguration.cs
- DataGridViewAutoSizeColumnsModeEventArgs.cs
- UInt16.cs
- ToolStripProgressBar.cs
- WinEventWrap.cs
- Executor.cs
- OverrideMode.cs
- OdbcRowUpdatingEvent.cs
- JsonServiceDocumentSerializer.cs
- RuntimeHandles.cs
- TextEndOfParagraph.cs
- CmsUtils.cs
- ValidationError.cs
- ZipFileInfo.cs
- DefaultMemberAttribute.cs
- DesignerDataParameter.cs
- Privilege.cs
- UseLicense.cs
- SamlEvidence.cs
- LocationReference.cs
- TemplateControlCodeDomTreeGenerator.cs
- MsmqTransportElement.cs
- SystemEvents.cs
- XPathBinder.cs
- _SSPIWrapper.cs
- ActiveXHost.cs
- XmlAttribute.cs
- ImageAttributes.cs
- ProfilePropertyNameValidator.cs
- CrossAppDomainChannel.cs
- XmlNamespaceManager.cs
- TopClause.cs
- RelOps.cs
- SingleObjectCollection.cs
- CodeCastExpression.cs
- VisualTreeHelper.cs
- ProviderConnectionPoint.cs
- ChannelProtectionRequirements.cs
- DataContractJsonSerializer.cs
- CharacterHit.cs
- SchemaTypeEmitter.cs
- XamlFigureLengthSerializer.cs
- ProcessModelSection.cs
- DockAndAnchorLayout.cs
- SafeFileMappingHandle.cs
- XmlWrappingWriter.cs
- Size.cs
- DesigntimeLicenseContextSerializer.cs
- ToolStripComboBox.cs
- TableItemProviderWrapper.cs
- XsltConvert.cs
- MD5CryptoServiceProvider.cs
- ILGen.cs
- TransactionsSectionGroup.cs
- XmlAnyElementAttribute.cs
- MenuBase.cs
- QuotedPrintableStream.cs
- ScrollBarRenderer.cs
- TextLine.cs
- Canonicalizers.cs
- FunctionParameter.cs
- GroupBoxAutomationPeer.cs
- Cursor.cs
- CodeSnippetExpression.cs
- InfiniteTimeSpanConverter.cs
- BinaryFormatter.cs
- ProviderUtil.cs
- XmlMessageFormatter.cs
- CommittableTransaction.cs