mcs/class/System.Web/System.Web/HttpParamsCollection.cs

   1 //
   2 // System.Web.HttpParamsCollection
   3 //
   4 // Authors:
   5 //   Vladimir Krasnov (vladimirk@mainsoft.com)
   6 //
   7 // (C) 2006 Mainsoft Co. (http://www.mainsoft.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections.Specialized;
  31 using System.Runtime.Serialization;
  32
  33 namespace System.Web
  34 {
  35         internal class HttpParamsCollection : WebROCollection
  36         {
  37                 private NameValueCollection _queryString;
  38                 private NameValueCollection _form;
  39                 private NameValueCollection _serverVariables;
  40                 private HttpCookieCollection _cookies;
  41                 private bool _merged;
  42
  43                 public HttpParamsCollection (NameValueCollection queryString,
  44                                                                         NameValueCollection form,
  45                                                                         NameValueCollection serverVariables,
  46                                                                         HttpCookieCollection cookies)
  47                 {
  48                         _queryString = queryString;
  49                         _form = form;
  50                         _serverVariables = serverVariables;
  51                         _cookies = cookies;
  52                         _merged = false;
  53                         Protect ();
  54                 }
  55
  56                 public override string Get (string name)
  57                 {
  58                         if (_merged)
  59                                 return base.Get (name);
  60
  61                         string values = null;
  62
  63                         string query_value = _queryString [name];
  64                         if (query_value != null)
  65                                 values += query_value;
  66
  67                         string form_value = _form [name];
  68                         if (form_value != null)
  69                                 values += "," + form_value;
  70
  71                         string servar_value = _serverVariables [name];
  72                         if (servar_value != null)
  73                                 values += "," + servar_value;
  74
  75                         HttpCookie answer = _cookies [name];
  76                         string cookie_value = ((answer == null) ? null : answer.Value);
  77                         if (cookie_value != null)
  78                                 values += "," + cookie_value;
  79
  80                         if (values == null)
  81                                 return null;
  82
  83                         if (values.Length > 0 && values [0] == ',')
  84                                 return values.Substring (1);
  85
  86                         return values;
  87                 }
  88
  89                 private void MergeCollections ()
  90                 {
  91                         if (_merged)
  92                                 return;
  93
  94                         Unprotect ();
  95
  96                         Add (_queryString);
  97                         Add (_form);
  98                         Add (_serverVariables);
  99
 100                         /* special handling for Cookies since
 101                          * it isn't a NameValueCollection. */
 102                         for (int i = 0; i < _cookies.Count; i++) {
 103                                 HttpCookie cookie = _cookies [i];
 104                                 Add (cookie.Name, cookie.Value);
 105                         }
 106
 107                         _merged = true;
 108
 109                         Protect ();
 110                 }
 111
 112                 public override string Get (int index)
 113                 {
 114                         MergeCollections ();
 115                         return base.Get (index);
 116                 }
 117
 118                 public override string GetKey (int index)
 119                 {
 120                         MergeCollections ();
 121                         return base.GetKey (index);
 122                 }
 123
 124                 public override string [] GetValues (int index)
 125                 {
 126                         string value = Get (index);
 127                         if (value == null)
 128                                 return null;
 129
 130                         return value.Split (',');
 131                 }
 132
 133                 public override string [] GetValues (string name)
 134                 {
 135                         string value = Get (name);
 136                         if (value == null)
 137                                 return null;
 138
 139                         return value.Split (',');
 140                 }
 141
 142                 public override void GetObjectData (SerializationInfo info, StreamingContext context)
 143                 {
 144                         throw new SerializationException ();
 145                 }
 146
 147                 public override string [] AllKeys
 148                 {
 149                         get
 150                         {
 151                                 MergeCollections ();
 152                                 return base.AllKeys;
 153                         }
 154                 }
 155
 156                 public override int Count
 157                 {
 158                         get
 159                         {
 160                                 MergeCollections ();
 161                                 return base.Count;
 162                         }
 163                 }
 164         }
 165 }