Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Shared / MS / Internal / MimeTypeMapper.cs / 1 / MimeTypeMapper.cs
using System; using System.Collections; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Security; using System.Security.Permissions; using System.Text; #if PRESENTATION_CORE using MS.Internal.PresentationCore; // for FriendAccessAllowed and BindUriHelper.UriToString #else #error Class is being used from an unknown assembly. #endif namespace MS.Internal { [FriendAccessAllowed] internal static class MimeTypeMapper { static internal ContentType GetMimeTypeFromUri(Uri uriSource) { ContentType mimeType = ContentType.Empty; if (uriSource != null) { Uri uri = uriSource; if (uri.IsAbsoluteUri == false) { uri = new Uri("http://foo/bar/"); uri = new Uri(uri, uriSource); } string completeExt = GetFileExtension(uri); lock (((ICollection)_fileExtensionToMimeType).SyncRoot) { // initialize for the first time if (_fileExtensionToMimeType.Count == 0) { // Adding the known mime types to the hash table. _fileExtensionToMimeType.Add(XamlExtension, XamlMime); _fileExtensionToMimeType.Add(BamlExtension, BamlMime); _fileExtensionToMimeType.Add(JpgExtension, JpgMime); _fileExtensionToMimeType.Add(XbapExtension, XbapMime); } if (!_fileExtensionToMimeType.TryGetValue(completeExt, out mimeType)) { // // If the hashtable doesn't contain the MimeType for this extension, // Call UrlMon API to get it, once UrlMon API returns a vallid MimeType, // update it into the hashtable, so that the next time query for a Uri // with the same extension will be faster. // mimeType = GetMimeTypeFromUrlMon(uriSource); if (mimeType != ContentType.Empty) { _fileExtensionToMimeType.Add(completeExt, mimeType); } } } } return mimeType; } // // Call UrlMon API to get MimeType for a given extension. // ////// SecurityCritical: uses UnsafeNativeMethods FindMimeFromData /// SecurityTreatAsSafe: /// The information returned is the mime-type associated with /// the extension at the end of the Uri /// Considered safe information to expose. /// [SecurityCritical,SecurityTreatAsSafe] static private ContentType GetMimeTypeFromUrlMon(Uri uriSource) { ContentType mimeType = ContentType.Empty; if (uriSource != null) { int retValue; string mimeTypeString; retValue = MS.Win32.Compile.UnsafeNativeMethods.FindMimeFromData(null, BindUriHelper.UriToString( uriSource ) , IntPtr.Zero, 0, null, 0, out mimeTypeString, 0); // For PreSharp 56031, // This return value must be checked as the function // will not throw an exception on failure. // the expected return value is S_OK. if (retValue == 0 && mimeTypeString != null) { mimeType = new ContentType(mimeTypeString); } } return mimeType; } static private string GetDocument(Uri uri) { string docstring; if (uri.IsFile) { // LocalPath will un-escape characters, convert a file:/// // URI back into a local file system path. It will also // drop any post-pended characters. ([....]) // // "file:///c:/Program%20Files/foo.xmf#bar.jpg" // becomes // "C:\Program Files\foo.xmf" docstring = uri.LocalPath; } else { // When not using the file scheme, escaped characters need // to stay there and we rely on the Uri class to take care // of figuring out what's going on. docstring = uri.GetLeftPart(UriPartial.Path); } return docstring; } static internal string GetFileExtension(Uri uri) { string docString = GetDocument(uri); string extensionWithDot = Path.GetExtension(docString); string extension = String.Empty; if (String.IsNullOrEmpty(extensionWithDot) == false) { extension = extensionWithDot.Substring(1).ToLower(CultureInfo.InvariantCulture); } return extension; } static internal bool IsHTMLMime(ContentType contentType) { return (HtmlMime.AreTypeAndSubTypeEqual(contentType) || HtmMime.AreTypeAndSubTypeEqual(contentType)); } // The initial size of the hashtable mapps to the initial Known mimetypes. // If more known mimetypes are added later, please change this number also // for better perf. private static readonly Dictionary_fileExtensionToMimeType = new Dictionary (4); // Unspported MIME type internal static readonly ContentType OctetMime = new ContentType("application/octet-stream"); // Known file extensions internal const string XamlExtension = "xaml"; internal const string BamlExtension = "baml"; internal const string XbapExtension = "xbap"; internal const string JpgExtension = "jpg"; // Supported MIME types: internal static readonly ContentType XamlMime = new ContentType("application/xaml+xml"); internal static readonly ContentType BamlMime = new ContentType("application/baml+xml"); internal static readonly ContentType JpgMime = new ContentType("image/jpg"); internal static readonly ContentType IconMime = new ContentType("image/x-icon"); internal static readonly ContentType FixedDocumentSequenceMime = new ContentType("application/vnd.ms-package.xps-fixeddocumentsequence+xml"); internal static readonly ContentType FixedDocumentMime = new ContentType("application/vnd.ms-package.xps-fixeddocument+xml"); internal static readonly ContentType FixedPageMime = new ContentType("application/vnd.ms-package.xps-fixedpage+xml"); internal static readonly ContentType ResourceDictionaryMime = new ContentType("application/vnd.ms-package.xps-resourcedictionary+xml"); internal static readonly ContentType HtmlMime = new ContentType("text/html"); internal static readonly ContentType HtmMime = new ContentType("text/htm"); internal static readonly ContentType XbapMime = new ContentType("application/x-ms-xbap"); } } // 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
- MultipartContentParser.cs
- TextEffect.cs
- ImageConverter.cs
- BatchParser.cs
- TransportListener.cs
- Point3DValueSerializer.cs
- OpenFileDialog.cs
- CompilerCollection.cs
- SortDescription.cs
- ConfigurationManagerHelper.cs
- UidPropertyAttribute.cs
- Formatter.cs
- FlowLayoutSettings.cs
- TemplatedAdorner.cs
- AutomationPropertyInfo.cs
- EntityDataSourceEntitySetNameItem.cs
- ManagedWndProcTracker.cs
- SQLConvert.cs
- RelationshipSet.cs
- Util.cs
- Effect.cs
- WebPartConnectionCollection.cs
- LogEntrySerializer.cs
- FormViewInsertedEventArgs.cs
- Span.cs
- SessionStateSection.cs
- BuildTopDownAttribute.cs
- isolationinterop.cs
- DataBindingExpressionBuilder.cs
- User.cs
- XmlSchemaExternal.cs
- BooleanExpr.cs
- Decoder.cs
- WebPartDesigner.cs
- ProbeMatches11.cs
- HtmlFormWrapper.cs
- FamilyMapCollection.cs
- WebServiceBindingAttribute.cs
- ToolStripPanel.cs
- MasterPage.cs
- ValidateNames.cs
- AssociatedControlConverter.cs
- WebPartConnectionsEventArgs.cs
- ObjectHandle.cs
- SaveRecipientRequest.cs
- CfgArc.cs
- ProjectionCamera.cs
- ObjectRef.cs
- ProgressBar.cs
- SqlClientWrapperSmiStreamChars.cs
- XmlSchemaRedefine.cs
- PropertyPathConverter.cs
- XslAst.cs
- StandardToolWindows.cs
- HScrollBar.cs
- WebPartExportVerb.cs
- BaseTemplateCodeDomTreeGenerator.cs
- Msec.cs
- CacheVirtualItemsEvent.cs
- SqlFileStream.cs
- LoginView.cs
- BooleanFunctions.cs
- COM2Properties.cs
- GroupBoxRenderer.cs
- TypeUtils.cs
- MbpInfo.cs
- SqlDataSourceFilteringEventArgs.cs
- CompoundFileStreamReference.cs
- COM2ColorConverter.cs
- KeyedHashAlgorithm.cs
- ObjectKeyFrameCollection.cs
- InternalPermissions.cs
- WizardStepBase.cs
- Pair.cs
- XamlPointCollectionSerializer.cs
- InvalidCommandTreeException.cs
- OdbcDataAdapter.cs
- EdmValidator.cs
- SqlCacheDependencyDatabaseCollection.cs
- XmlAnyAttributeAttribute.cs
- dbenumerator.cs
- XPathBuilder.cs
- CompensationExtension.cs
- ApplicationHost.cs
- ExclusiveHandleList.cs
- CannotUnloadAppDomainException.cs
- WebControl.cs
- DataGridPagerStyle.cs
- ScaleTransform3D.cs
- FrameworkEventSource.cs
- TypeLibConverter.cs
- TypedRowGenerator.cs
- ContractMapping.cs
- KeyedHashAlgorithm.cs
- PathFigureCollection.cs
- KeyGesture.cs
- ListParagraph.cs
- ListItemCollection.cs
- FamilyTypeface.cs
- DbParameterHelper.cs