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
- EntityKey.cs
- MailWebEventProvider.cs
- CodeConditionStatement.cs
- Setter.cs
- ListBoxItemAutomationPeer.cs
- DbTransaction.cs
- _NegotiateClient.cs
- ExceptionHandler.cs
- TextSyndicationContentKindHelper.cs
- webproxy.cs
- TypeTypeConverter.cs
- EntryIndex.cs
- OperationContractGenerationContext.cs
- CodeSnippetTypeMember.cs
- QuaternionAnimationUsingKeyFrames.cs
- ObjectQueryState.cs
- ViewSimplifier.cs
- CommentEmitter.cs
- DataMemberAttribute.cs
- XamlInt32CollectionSerializer.cs
- DrawingBrush.cs
- TextSelectionHelper.cs
- GridViewRowCollection.cs
- MulticastNotSupportedException.cs
- TreeNodeCollection.cs
- SqlClientFactory.cs
- FormsAuthenticationConfiguration.cs
- TextTreeNode.cs
- SerTrace.cs
- SqlException.cs
- DecoratedNameAttribute.cs
- XmlSignatureProperties.cs
- CursorConverter.cs
- Menu.cs
- ChtmlSelectionListAdapter.cs
- AspNetRouteServiceHttpHandler.cs
- VisualProxy.cs
- SynthesizerStateChangedEventArgs.cs
- validation.cs
- EnumUnknown.cs
- VideoDrawing.cs
- PasswordBoxAutomationPeer.cs
- DataExpression.cs
- xml.cs
- AnnotationMap.cs
- CfgRule.cs
- IxmlLineInfo.cs
- BuildProvider.cs
- PointCollectionConverter.cs
- CompareValidator.cs
- WindowsAuthenticationEventArgs.cs
- MenuItem.cs
- AsyncCompletedEventArgs.cs
- TemplatePropertyEntry.cs
- BufferModeSettings.cs
- ResourceProperty.cs
- entityreference_tresulttype.cs
- GroupStyle.cs
- MimeParameterWriter.cs
- SqlErrorCollection.cs
- securitymgrsite.cs
- CompilationSection.cs
- GeometryDrawing.cs
- RegexCharClass.cs
- AccessKeyManager.cs
- ThreadAbortException.cs
- PartitionerQueryOperator.cs
- Codec.cs
- HtmlObjectListAdapter.cs
- SpecialFolderEnumConverter.cs
- PostBackOptions.cs
- WindowsGraphics.cs
- CultureSpecificCharacterBufferRange.cs
- FrameworkContentElement.cs
- AppliedDeviceFiltersDialog.cs
- NonSerializedAttribute.cs
- TimeSpanStorage.cs
- Point3DValueSerializer.cs
- ObjectItemAttributeAssemblyLoader.cs
- UnsafeNativeMethods.cs
- CFStream.cs
- MiniConstructorInfo.cs
- MsmqIntegrationBindingCollectionElement.cs
- SolidBrush.cs
- InvocationExpression.cs
- ObjectAnimationUsingKeyFrames.cs
- WebPartCancelEventArgs.cs
- SByte.cs
- StringHandle.cs
- SmiRequestExecutor.cs
- ImageSourceValueSerializer.cs
- StyleSheetComponentEditor.cs
- externdll.cs
- SqlProviderManifest.cs
- Rule.cs
- InputScope.cs
- CodeSpit.cs
- DocumentGrid.cs
- ConfigXmlElement.cs
- Matrix3DValueSerializer.cs