mcs/class/System.Web/System.Web.Caching/CachedVaryBy.cs

   1 //
   2 // System.Web.Caching.CachedVaryBy
   3 //
   4 // Author(s):
   5 //  Jackson Harper (jackson@ximian.com)
   6 //
   7 // (C) 2003 Novell, Inc (http://www.novell.com)
   8 //
   9
  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
  32 using System;
  33 using System.Text;
  34 using System.Collections;
  35
  36 namespace System.Web.Caching {
  37
  38         internal class CachedVaryBy {
  39
  40                 private string[] prms;
  41                 private string[] headers;
  42                 private string custom;
  43                 private string key;
  44                 private ArrayList item_list;
  45                 private bool wildCardParams;
  46
  47                 internal CachedVaryBy (HttpCachePolicy policy, string key)
  48                 {
  49                         prms = policy.VaryByParams.GetParamNames ();
  50                         headers = policy.VaryByHeaders.GetHeaderNames ();
  51                         custom = policy.GetVaryByCustom ();
  52                         this.key = key;
  53                         item_list = new ArrayList ();
  54                         wildCardParams = policy.VaryByParams ["*"];
  55                 }
  56
  57                 internal ArrayList ItemList {
  58                         get { return item_list; }
  59                 }
  60
  61                 internal string Key {
  62                         get { return key; }
  63                 }
  64
  65                 internal string CreateKey (string file_path, HttpContext context)
  66                 {
  67                         StringBuilder builder = new StringBuilder ();
  68                         HttpApplication app = context.ApplicationInstance;
  69                         HttpRequest request = context.Request;
  70
  71                         builder.Append ("CachedRawResponse\n");
  72                         builder.Append (file_path);
  73                         builder.Append ('\n');
  74                         builder.Append ("METHOD:" + request.HttpMethod);
  75                         builder.Append ('\n');
  76
  77                         if (prms != null) {
  78                                 for (int i=0; i<prms.Length; i++) {
  79                                         if (request.Params [prms [i]] == null)
  80                                                 continue;
  81                                         builder.Append ("VP:");
  82                                         builder.Append (prms [i]);
  83                                         builder.Append ('=');
  84                                         builder.Append (request.Params [prms [i]]);
  85                                         builder.Append ('\n');
  86                                 }
  87                         } else if (wildCardParams) {
  88                                 foreach (string p in request.Params) {
  89                                         builder.Append ("VP:");
  90                                         builder.Append (p);
  91                                         builder.Append ('=');
  92                                         builder.Append (request.Params [p]);
  93                                         builder.Append ('\n');
  94                                 }
  95                         }
  96
  97                         if (headers != null) {
  98                                 for (int i=0; i<headers.Length; i++) {
  99                                         builder.Append ("VH:");
 100                                         builder.Append (headers [i]);
 101                                         builder.Append ('=');
 102                                         builder.Append (request.Headers [headers [i]]);
 103                                         builder.Append ('\n');
 104                                 }
 105                         }
 106
 107                         if (custom != null) {
 108                                 string s = app.GetVaryByCustomString (context, custom);
 109                                 builder.Append ("VC:");
 110                                 builder.Append (custom);
 111                                 builder.Append ('=');
 112                                 builder.Append (s != null ? s : "__null__");
 113                                 builder.Append ('\n');
 114                         }
 115
 116                         return builder.ToString ();
 117                 }
 118         }
 119 }
 120