Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / fx / src / xsp / System / Web / HttpCacheVary.cs / 1 / HttpCacheVary.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * Cache Vary class. Wraps Vary header * * Copyright (c) 1998 Microsoft Corporation */ namespace System.Web { using System.Text; using System.Runtime.InteropServices; using System.Web.Util; using System.Security.Permissions; ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class HttpCacheVaryByHeaders { bool _isModified; bool _varyStar; HttpDictionary _headers; internal HttpCacheVaryByHeaders() { Reset(); } internal void Reset() { _isModified = false; _varyStar = false; _headers = null; } /* * Reset based on the cached vary headers. */ internal void ResetFromHeaders(String[] headers) { int i, n; if (headers == null) { _isModified = false; _varyStar = false; _headers = null; } else { _isModified = true; if (headers[0].Equals("*")) { Debug.Assert(headers.Length == 1, "headers.Length == 1"); _varyStar = true; _headers = null; } else { _varyStar = false; _headers = new HttpDictionary(); for (i = 0, n = headers.Length; i < n; i++) { _headers.SetValue(headers[i], headers[i]); } } } } internal bool IsModified() { return _isModified; } /* * Construct header value string */ internal String ToHeaderString() { StringBuilder s; Object item; int i, n; if (_varyStar) { return "*"; } else if (_headers != null) { s = new StringBuilder(); for (i = 0, n = _headers.Size; i < n; i++) { item = _headers.GetValue(i); if (item != null) { HttpCachePolicy.AppendValueToHeader(s, (String)item); } } if (s.Length > 0) return s.ToString(); } return null; } /* * Returns the headers, for package access only. * * @return the headers. */ internal String[] GetHeaders() { String[] s = null; Object item; int i, j, c, n; if (_varyStar) { return new String[1] {"*"}; } else if (_headers != null) { n = _headers.Size; c = 0; for (i = 0; i < n; i++) { item = _headers.GetValue(i); if (item != null) { c++; } } if (c > 0) { s = new string[c]; j = 0; for (i = 0; i < n; i++) { item = _headers.GetValue(i); if (item != null) { s[j] = (String) item; j++; } } Debug.Assert(j == c, "j == c"); } } return s; } // // Public methods and properties // ///Indicates that a cache should contain multiple /// representations for a particular Uri. This class is an encapsulation that /// provides a rich, type-safe way to set the Vary header. ////// public void VaryByUnspecifiedParameters() { _isModified = true; _varyStar = true; _headers = null; } internal bool GetVaryByUnspecifiedParameters() { return _varyStar; } /* * Vary by accept types */ ///Sets the "Vary: *" header and causes all other Vary: /// header information to be dropped. ////// public bool AcceptTypes { get { return this["Accept"]; } set { _isModified = true; this["Accept"] = value; } } /* * Vary by accept language */ ///Retrieves or assigns a value indicating whether the cache should vary by Accept types. This causes the /// Vary: header to include an Accept field. ////// public bool UserLanguage { get { return this["Accept-Language"]; } set { _isModified = true; this["Accept-Language"] = value; } } /* * Vary by user agent */ ///Retrieves or assigns a Boolean value indicating whether /// the cache should vary by user language. ////// public bool UserAgent { get { return this["User-Agent"]; } set { _isModified = true; this["User-Agent"] = value; } } /* * Vary by charset */ ///Retrieves or assigns a Boolean value indicating whether /// the cache should vary by user agent. ////// public bool UserCharSet { get { return this["Accept-Charset"]; } set { _isModified = true; this["Accept-Charset"] = value; } } /* * Vary by a given header */ ///Retrieves or assigns a value indicating whether the /// cache should vary by browser character set. ////// public bool this[String header] { get { if (header == null) { throw new ArgumentNullException("header"); } if (header.Equals("*")) { return _varyStar; } else { return (_headers != null && _headers.GetValue(header) != null); } } set { if (header == null) { throw new ArgumentNullException("header"); } /* * Since adding a Vary header is more restrictive, we don't * want components to be able to set a Vary header to false * if another component has set it to true. */ if (value == false) { return; } _isModified = true; if (header.Equals("*")) { VaryByUnspecifiedParameters(); } else { // set value to header if true or null if false if (!_varyStar) { if (_headers == null) { _headers = new HttpDictionary(); } _headers.SetValue(header, header); } } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.Default property. /// Indexed property indicating that a cache should (or should not) vary according /// to a custom header. ///
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- RunWorkerCompletedEventArgs.cs
- GlobalizationAssembly.cs
- CommonRemoteMemoryBlock.cs
- WinEventHandler.cs
- HttpCapabilitiesBase.cs
- FileStream.cs
- RegexFCD.cs
- SelectionItemPattern.cs
- InteropTrackingRecord.cs
- CultureSpecificCharacterBufferRange.cs
- LinqDataSourceSelectEventArgs.cs
- PenThreadPool.cs
- StronglyTypedResourceBuilder.cs
- SpeechSynthesizer.cs
- HTMLTextWriter.cs
- SafeMemoryMappedFileHandle.cs
- DynamicObjectAccessor.cs
- GetPageCompletedEventArgs.cs
- ExpressionEditorAttribute.cs
- WebEventCodes.cs
- UrlPath.cs
- StringSorter.cs
- BitmapPalette.cs
- XmlSortKey.cs
- DecoderFallbackWithFailureFlag.cs
- OdbcParameter.cs
- MarshalByValueComponent.cs
- LayoutTableCell.cs
- FlowPosition.cs
- AggregationMinMaxHelpers.cs
- XmlSchemaDocumentation.cs
- FieldBuilder.cs
- XmlILOptimizerVisitor.cs
- WebBrowserDocumentCompletedEventHandler.cs
- SpellCheck.cs
- XmlTextEncoder.cs
- DataServiceCollectionOfT.cs
- ButtonFieldBase.cs
- CompositeKey.cs
- KnownTypesProvider.cs
- EditorPartChrome.cs
- DateTimeFormatInfo.cs
- WebScriptServiceHost.cs
- KeyValueSerializer.cs
- DirectoryGroupQuery.cs
- XmlNode.cs
- DataGridViewRowPrePaintEventArgs.cs
- StreamingContext.cs
- UnauthorizedAccessException.cs
- SRDisplayNameAttribute.cs
- SmuggledIUnknown.cs
- Attributes.cs
- PathGeometry.cs
- CodeAttributeArgument.cs
- Crypto.cs
- ToolStripLabel.cs
- StrokeCollectionConverter.cs
- ServiceObjectContainer.cs
- SqlDataSourceFilteringEventArgs.cs
- RouteCollection.cs
- InternalTypeHelper.cs
- ControlFilterExpression.cs
- LogReserveAndAppendState.cs
- ListManagerBindingsCollection.cs
- BrowserInteropHelper.cs
- SemanticResultValue.cs
- DbBuffer.cs
- Rect.cs
- XmlDomTextWriter.cs
- StandardBindingImporter.cs
- WebSysDescriptionAttribute.cs
- DetectRunnableInstancesTask.cs
- DefaultValueAttribute.cs
- GlyphRunDrawing.cs
- HtmlTextArea.cs
- PresentationSource.cs
- RequestResizeEvent.cs
- SystemFonts.cs
- GC.cs
- TypeUtil.cs
- XmlILIndex.cs
- ObjectTypeMapping.cs
- InitializerFacet.cs
- ProtectedConfigurationProviderCollection.cs
- ObjectCache.cs
- HtmlTable.cs
- XsdCachingReader.cs
- UInt64.cs
- TextElementCollectionHelper.cs
- SmtpCommands.cs
- ComponentEvent.cs
- SiteMap.cs
- TextBox.cs
- XMLSyntaxException.cs
- InstancePersistenceCommandException.cs
- XslTransform.cs
- XamlPoint3DCollectionSerializer.cs
- AutoScrollExpandMessageFilter.cs
- ScaleTransform3D.cs
- DataErrorValidationRule.cs