Merge pull request #1225 from strawd/bug22307
[mono.git] / 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                 public
46                 HttpCacheVaryByParams ()
47                 {
48                         /* the parameter names are meant to be case insensitive */
49                         parms = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
50                 }
51
52                 internal string[] GetParamNames ()
53                 {
54                         string[] names;
55
56                         names = new string [parms.Count];
57
58                         parms.Keys.CopyTo (names, 0);
59
60                         return names;
61                 }
62
63                 internal string GetResponseHeaderValue ()
64                 {
65                         StringBuilder builder = new StringBuilder ();
66
67                         foreach (string parm in parms.Keys) {
68                                 builder.Append (parm);
69                                 builder.Append ("; ");
70                         }
71
72                         if (builder.Length == 0)
73                                 return null;
74
75                         return builder.ToString();
76                 }
77
78                 public bool IgnoreParams {
79                         get {
80                                 return ignore_parms;
81                         }
82                         set {
83                                 ignore_parms = value;
84                         }
85                 }
86
87                 public bool this [ string param ] {
88                         get {
89                                 if (param == null)
90                                         throw new ArgumentNullException ();
91
92                                 return parms.Contains (param);
93                         }
94                         set {
95                                 if (param == null)
96                                         throw new ArgumentNullException ();
97
98                                 ignore_parms = false;
99                                 if (value)
100                                         if (!parms.Contains (param))
101                                                 parms.Add (param, true);
102                                 else
103                                         parms.Remove (param);
104                         }
105                 }
106         }
107
108 }