mcs/class/System.Web/System.Web.Configuration/GlobalizationConfigurationHandler.cs

   1 //
   2 // System.Web.Configuration.GlobalizationConfigurationHandler
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2003 Ximian, Inc (http://www.ximian.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 using System.Configuration;
  32 using System.Globalization;
  33 using System.Text;
  34 using System.Xml;
  35
  36 namespace System.Web.Configuration
  37 {
  38         class GlobalizationConfigurationHandler : IConfigurationSectionHandler
  39         {
  40                 static bool encoding_warning;
  41                 static bool culture_warning;
  42
  43                 public object Create (object parent, object configContext, XmlNode section)
  44                 {
  45                         GlobalizationConfiguration config = new GlobalizationConfiguration (parent);
  46
  47                         if (section.HasChildNodes)
  48                                 ThrowException ("No child nodes allowed here.", section);
  49
  50                         string attvalue = AttValue ("requestEncoding", section, true);
  51                         if (attvalue != null)
  52                                 config.RequestEncoding = GetEncoding (section, "requestEncoding", attvalue);
  53
  54                         attvalue = AttValue ("responseEncoding", section, true);
  55                         if (attvalue != null)
  56                                 config.ResponseEncoding = GetEncoding (section, "responseEncoding", attvalue);
  57
  58                         attvalue = AttValue ("fileEncoding", section, true);
  59                         if (attvalue != null)
  60                                 config.FileEncoding = GetEncoding (section, "fileEncoding", attvalue);
  61
  62                         attvalue = AttValue ("culture", section, true);
  63                         if (attvalue != null)
  64                                 config.Culture = GetCulture (section, "culture", attvalue);
  65
  66                         attvalue = AttValue ("uiCulture", section, true);
  67                         if (attvalue != null)
  68                                 config.UICulture = GetCulture (section, "uiCulture", attvalue);
  69
  70                         if (section.Attributes == null || section.Attributes.Count != 0)
  71                                 ThrowException ("Unknown attribute(s).", section);
  72
  73                         return config;
  74                 }
  75
  76                 static Encoding GetEncoding (XmlNode section, string att, string enc)
  77                 {
  78                         Encoding encoding = null;
  79                         try {
  80                                 switch (enc.ToLower ()) {
  81                                 case "utf-16le":
  82                                 case "utf-16":
  83                                 case "ucs-2":
  84                                 case "unicode":
  85                                 case "iso-10646-ucs-2":
  86                                         encoding = new UnicodeEncoding (false, true);
  87                                         break;
  88                                 case "utf-16be":
  89                                 case "unicodefffe":
  90                                         encoding = new UnicodeEncoding (true, true);
  91                                         break;
  92                                 case "utf-8":
  93                                 case "unicode-1-1-utf-8":
  94                                 case "unicode-2-0-utf-8":
  95                                 case "x-unicode-1-1-utf-8":
  96                                 case "x-unicode-2-0-utf-8":
  97                                         encoding = new UTF8Encoding (false, false);
  98                                         break;
  99                                 default:
 100                                         encoding = Encoding.GetEncoding (enc);
 101                                         break;
 102                                 }
 103                         } catch {
 104                                 EncodingFailed (section, att, enc);
 105                                 encoding = new UTF8Encoding (false, false);
 106                         }
 107
 108                         return encoding;
 109                 }
 110
 111                 static CultureInfo GetCulture (XmlNode section, string att, string cul)
 112                 {
 113                         CultureInfo culture = null;
 114                         try {
 115                                 culture = new CultureInfo (cul);
 116                         } catch {
 117                                 CultureFailed (section, att, cul);
 118                                 culture = new CultureInfo (0x007f); // Invariant
 119                         }
 120
 121                         return culture;
 122                 }
 123
 124                 static void EncodingFailed (XmlNode section, string att, string enc)
 125                 {
 126                         if (encoding_warning)
 127                                 return;
 128
 129                         encoding_warning = true;
 130                         Console.WriteLine ("Encoding {1} cannot be loaded.\n" +
 131                                            "{0}=\"{1}\"\n", att, enc);
 132                 }
 133
 134                 static void CultureFailed (XmlNode section, string att, string cul)
 135                 {
 136                         if (culture_warning)
 137                                 return;
 138
 139                         culture_warning = true;
 140                         Console.WriteLine ("Culture {1} cannot be loaded. Perhaps your runtime \n" +
 141                                            "don't have ICU support?\n{0}=\"{1}\"\n", att, cul);
 142                 }
 143
 144                 // A few methods to save some typing
 145                 static string AttValue (string name, XmlNode node, bool optional)
 146                 {
 147                         return HandlersUtil.ExtractAttributeValue (name, node, optional);
 148                 }
 149
 150                 static void ThrowException (string message, XmlNode node)
 151                 {
 152                         HandlersUtil.ThrowException (message, node);
 153                 }
 154                 //
 155         }
 156 }
 157