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.Globalization;
  34 using System.Text;
  35 using System.Collections;
  36
  37 namespace System.Web.Caching {
  38
  39         internal class CachedVaryBy {
  40
  41                 private string[] prms;
  42                 private string[] headers;
  43                 private string custom;
  44                 private string key;
  45                 private ArrayList item_list;
  46                 private bool wildCardParams;
  47
  48                 internal CachedVaryBy (HttpCachePolicy policy, string key)
  49                 {
  50                         prms = policy.VaryByParams.GetParamNames ();
  51                         headers = policy.VaryByHeaders.GetHeaderNames ();
  52                         custom = policy.GetVaryByCustom ();
  53                         this.key = key;
  54                         item_list = new ArrayList ();
  55                         wildCardParams = policy.VaryByParams ["*"];
  56                 }
  57
  58                 internal ArrayList ItemList {
  59                         get { return item_list; }
  60                 }
  61
  62                 internal string Key {
  63                         get { return key; }
  64                 }
  65
  66                 internal string CreateKey (string file_path, HttpContext context)
  67                 {
  68                         StringBuilder builder = new StringBuilder ();
  69                         HttpApplication app = context.ApplicationInstance;
  70                         HttpRequest request = context.Request;
  71
  72                         builder.Append ("CachedRawResponse\n");
  73                         builder.Append (file_path);
  74                         builder.Append ('\n');
  75                         builder.Append ("METHOD:" + request.HttpMethod);
  76                         builder.Append ('\n');
  77
  78                         if (wildCardParams) {
  79                                 foreach (string p in request.QueryString) {
  80                                         // FIXME: QueryString might contain a null key if a page gets called like this: page.aspx?arg (w/out the "=")
  81                                         if (p == null) continue;
  82                                         builder.Append ("VPQ:");
  83                                         builder.Append (p.ToLower (CultureInfo.InvariantCulture));
  84                                         builder.Append ('=');
  85                                         builder.Append (request.QueryString [p]);
  86                                         builder.Append ('\n');
  87                                 }
  88                                 foreach (string p in request.Form) {
  89                                         // FIXME: can this be null, too?
  90                                         if (p == null) continue;
  91                                         builder.Append ("VPF:");
  92                                         builder.Append (p.ToLower (CultureInfo.InvariantCulture));
  93                                         builder.Append ('=');
  94                                         builder.Append (request.Form [p]);
  95                                         builder.Append ('\n');
  96                                 }
  97                         } else if (prms != null) {
  98                                 for (int i=0; i<prms.Length; i++) {
  99                                         if (request.QueryString [prms [i]] != null) {
 100                                                 builder.Append ("VPQ:");
 101                                                 builder.Append (prms [i].ToLower (CultureInfo.InvariantCulture));
 102                                                 builder.Append ('=');
 103                                                 builder.Append (request.QueryString [prms [i]]);
 104                                                 builder.Append ('\n');
 105                                         }
 106                                         if (request.Form [prms [i]] != null) {
 107                                                 builder.Append ("VPF:");
 108                                                 builder.Append (prms [i].ToLower (CultureInfo.InvariantCulture));
 109                                                 builder.Append ('=');
 110                                                 builder.Append (request.Form [prms [i]]);
 111                                                 builder.Append ('\n');
 112                                         }
 113                                 }
 114                         }
 115
 116                         if (headers != null) {
 117                                 for (int i=0; i<headers.Length; i++) {
 118                                         builder.Append ("VH:");
 119                                         builder.Append (headers [i].ToLower (CultureInfo.InvariantCulture));
 120                                         builder.Append ('=');
 121                                         builder.Append (request.Headers [headers [i]]);
 122                                         builder.Append ('\n');
 123                                 }
 124                         }
 125
 126                         if (custom != null) {
 127                                 string s = app.GetVaryByCustomString (context, custom);
 128                                 builder.Append ("VC:");
 129                                 builder.Append (custom);
 130                                 builder.Append ('=');
 131                                 builder.Append (s != null ? s : "__null__");
 132                                 builder.Append ('\n');
 133                         }
 134
 135                         return builder.ToString ();
 136                 }
 137         }
 138 }
 139