mcs/class/System.Web/System.Web/HttpCacheVaryByParams.cs

   1 //
   2 // System.Web.HttpVaryByParams.cs
   3 //
   4 // Author:
   5 //      Chris Toshok (toshok@novell.com)
   6 //
   7
   8 //
   9 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections;
  32 using System.Security.Permissions;
  33 using System.Text;
  34
  35 namespace System.Web {
  36
  37         // CAS - no InheritanceDemand here as the class is sealed
  38         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         public sealed class HttpCacheVaryByParams {
  40
  41                 bool ignore_parms;
  42                 Hashtable parms;
  43
  44                 internal HttpCacheVaryByParams ()
  45                 {
  46                         /* the parameter names are meant to be case insensitive */
  47 #if NET_2_0
  48                         parms = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
  49 #else
  50                         parms = new Hashtable(CaseInsensitiveHashCodeProvider.Default,
  51                                               CaseInsensitiveComparer.Default);
  52 #endif
  53                 }
  54
  55                 internal string[] GetParamNames ()
  56                 {
  57                         string[] names;
  58
  59                         names = new string [parms.Count];
  60
  61                         parms.Keys.CopyTo (names, 0);
  62
  63                         return names;
  64                 }
  65
  66                 internal BaseResponseHeader GetResponseHeader ()
  67                 {
  68                         StringBuilder builder = new StringBuilder ("");
  69
  70                         foreach (string parm in parms.Keys) {
  71                                 builder.Append (parm);
  72                                 builder.Append ("; ");
  73                         }
  74
  75                         if (builder.Length == 0)
  76                                 return null;
  77
  78                         return new UnknownResponseHeader ("Vary", builder.ToString());
  79                 }
  80
  81                 public bool IgnoreParams {
  82                         get {
  83                                 return ignore_parms;
  84                         }
  85                         set {
  86                                 ignore_parms = value;
  87                         }
  88                 }
  89
  90                 public bool this [ string param ] {
  91                         get {
  92                                 if (param == null)
  93                                         throw new ArgumentNullException ();
  94
  95                                 return parms.Contains (param);
  96                         }
  97                         set {
  98                                 if (param == null)
  99                                         throw new ArgumentNullException ();
 100
 101                                 ignore_parms = false;
 102                                 if (value)
 103                                         if (!parms.Contains (param))
 104                                                 parms.Add (param, true);
 105                                 else
 106                                         parms.Remove (param);
 107                         }
 108                 }
 109         }
 110
 111 }