Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / HttpCacheVaryByContentEncodings.cs / 1 / HttpCacheVaryByContentEncodings.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * HttpCacheVaryByContentEncodings * * 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 HttpCacheVaryByContentEncodings { String[] _contentEncodings; bool _isModified; internal HttpCacheVaryByContentEncodings() { Reset(); } internal void Reset() { _isModified = false; _contentEncodings = null; } /* * Reset based on content encodings. */ internal void ResetFromContentEncodings(String[] contentEncodings) { Reset(); if (contentEncodings != null) { _isModified = true; _contentEncodings = new String[contentEncodings.Length]; for (int i = 0; i < contentEncodings.Length; i++) { _contentEncodings[i] = contentEncodings[i]; } } } // the response is not cacheable if we're varying by content encoding // and the content-encoding header is not one of the encodings that we're // varying by internal bool IsCacheableEncoding(string coding) { // return true if we are not varying by content encoding. if (_contentEncodings == null) { return true; } // return true if there is no Content-Encoding header if (coding == null) { return true; } // return true if the Content-Encoding header is listed for (int i = 0; i < _contentEncodings.Length; i++) { if (_contentEncodings[i] == coding) { return true; } } // return false if the Content-Encoding header is not listed return false; } internal bool IsModified() { return _isModified; } internal String[] GetContentEncodings() { return _contentEncodings; } // // Public methods and properties // ///Provides a type-safe way to vary by Content-Encoding. ////// public bool this[String contentEncoding] { get { if (String.IsNullOrEmpty(contentEncoding)) { throw new ArgumentNullException(SR.GetString(SR.Parameter_NullOrEmpty, "contentEncoding")); } if (_contentEncodings == null) { return false; } for(int i = 0; i < _contentEncodings.Length; i++) { if (_contentEncodings[i] == contentEncoding) { return true; } } return false; } set { if (String.IsNullOrEmpty(contentEncoding)) { throw new ArgumentNullException(SR.GetString(SR.Parameter_NullOrEmpty, "contentEncoding")); } // if someone enabled it, don't allow someone else to disable it. if (!value) { return; } _isModified = true; if (_contentEncodings != null) { string[] contentEncodings = new String[_contentEncodings.Length + 1]; for (int i = 0; i < _contentEncodings.Length; i++) { contentEncodings[i] = _contentEncodings[i]; } contentEncodings[contentEncodings.Length - 1] = contentEncoding; _contentEncodings = contentEncodings; return; } _contentEncodings = new String[1]; _contentEncodings[0] = contentEncoding; } } } }Default property. /// Indexed property indicating that a cache should (or should not) vary according /// to a Content-Encoding. ///
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