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) 2005-2009 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
  38         // CAS - no InheritanceDemand here as the class is sealed
  39         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  40         public sealed class HttpCacheVaryByParams
  41         {
  42                 bool ignore_parms;
  43                 Hashtable parms;
  44
  45 #if NET_4_0
  46                 public
  47 #else
  48                 internal
  49 #endif
  50                 HttpCacheVaryByParams ()
  51                 {
  52                         /* the parameter names are meant to be case insensitive */
  53                         parms = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
  54                 }
  55
  56                 internal string[] GetParamNames ()
  57                 {
  58                         string[] names;
  59
  60                         names = new string [parms.Count];
  61
  62                         parms.Keys.CopyTo (names, 0);
  63
  64                         return names;
  65                 }
  66
  67                 internal string GetResponseHeaderValue ()
  68                 {
  69                         StringBuilder builder = new StringBuilder ();
  70
  71                         foreach (string parm in parms.Keys) {
  72                                 builder.Append (parm);
  73                                 builder.Append ("; ");
  74                         }
  75
  76                         if (builder.Length == 0)
  77                                 return null;
  78
  79                         return builder.ToString();
  80                 }
  81
  82                 public bool IgnoreParams {
  83                         get {
  84                                 return ignore_parms;
  85                         }
  86                         set {
  87                                 ignore_parms = value;
  88                         }
  89                 }
  90
  91                 public bool this [ string param ] {
  92                         get {
  93                                 if (param == null)
  94                                         throw new ArgumentNullException ();
  95
  96                                 return parms.Contains (param);
  97                         }
  98                         set {
  99                                 if (param == null)
 100                                         throw new ArgumentNullException ();
 101
 102                                 ignore_parms = false;
 103                                 if (value)
 104                                         if (!parms.Contains (param))
 105                                                 parms.Add (param, true);
 106                                 else
 107                                         parms.Remove (param);
 108                         }
 109                 }
 110         }
 111
 112 }