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

   1 //
   2 // System.Web.Configuration.CustomErrorsConfigHandler
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@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 using System;
  32 using System.Collections;
  33 using System.Configuration;
  34 using System.IO;
  35 using System.Xml;
  36
  37 namespace System.Web.Configuration
  38 {
  39         enum CustomErrorMode
  40         {
  41                 RemoteOnly,
  42                 On,
  43                 Off
  44         }
  45
  46         class CustomErrorsConfig
  47         {
  48                 string defaultRedirect;
  49                 CustomErrorMode mode;
  50                 Hashtable redirects;
  51                 string configFilePath;
  52
  53                 public CustomErrorsConfig (object parent, object context)
  54                 {
  55                         if (parent != null) {
  56                                 CustomErrorsConfig p = (CustomErrorsConfig) parent;
  57                                 mode = p.mode;
  58                                 defaultRedirect = p.defaultRedirect;
  59                                 if (p.redirects != null && p.redirects.Count > 0) {
  60                                         redirects = new Hashtable ();
  61                                         foreach (DictionaryEntry entry in p.redirects)
  62                                                 redirects [entry.Key] = entry.Value;
  63                                 }
  64                         }
  65
  66                         configFilePath = Path.GetDirectoryName ((string) context);
  67                 }
  68
  69                 public string DefaultRedirect {
  70                         get { return defaultRedirect; }
  71                         set { defaultRedirect = value; }
  72                 }
  73
  74                 public CustomErrorMode Mode {
  75                         get { return mode; }
  76                         set { mode = value; }
  77                 }
  78
  79                 public string ConfigFilePath {
  80                         get { return configFilePath; }
  81                 }
  82
  83                 public string this [int statusCode] {
  84                         get {
  85                                 if (redirects == null)
  86                                         return null;
  87
  88                                 return (string) redirects [statusCode];
  89                         }
  90
  91                         set {
  92                                 if (redirects == null)
  93                                         redirects = new Hashtable ();
  94
  95                                 // Overrides any previous setting for statusCode even in the same file
  96                                 redirects [statusCode] = value;
  97                         }
  98                 }
  99         }
 100
 101         class CustomErrorsConfigHandler : IConfigurationSectionHandler
 102         {
 103                 public object Create (object parent, object context, XmlNode section)
 104                 {
 105                         CustomErrorsConfig config = new CustomErrorsConfig (parent, context);
 106
 107                         string defaultRedirect = AttValue ("defaultRedirect", section);
 108                         if (defaultRedirect != null)
 109                                 config.DefaultRedirect = defaultRedirect;
 110
 111                         string mode = AttValue ("mode", section);
 112                         if (mode != null) {
 113                                 switch (mode) {
 114                                 case "On":
 115                                         config.Mode = CustomErrorMode.On;
 116                                         break;
 117                                 case "Off":
 118                                         config.Mode = CustomErrorMode.Off;
 119                                         break;
 120                                 case "RemoteOnly":
 121                                         config.Mode = CustomErrorMode.RemoteOnly;
 122                                         break;
 123                                 default:
 124                                         ThrowException ("Invalid value for 'mode': " + mode, section);
 125                                         break;
 126                                 }
 127                         }
 128
 129                         if (section.Attributes != null && section.Attributes.Count != 0)
 130                                 ThrowException ("Unrecognized attribute", section);
 131
 132                         if (!section.HasChildNodes)
 133                                 return config;
 134
 135                         XmlNodeList children = section.ChildNodes;
 136                         foreach (XmlNode child in children) {
 137                                 XmlNodeType ntype = child.NodeType;
 138                                 if (ntype == XmlNodeType.Whitespace || ntype == XmlNodeType.Comment)
 139                                         continue;
 140
 141                                 if (ntype != XmlNodeType.Element)
 142                                         ThrowException ("Only elements allowed", child);
 143
 144                                 if (child.Name != "error")
 145                                         ThrowException ("Unrecognized node: " + child.Name, child);
 146
 147                                 string statusCode = AttValue ("statusCode", child, false, false);
 148                                 string redirect = AttValue ("redirect", child, false, false);
 149                                 int code = 0;
 150                                 try {
 151                                         code = Int32.Parse (statusCode);
 152                                 } catch {
 153                                         ThrowException ("Unable to parse 'statusCode': " + statusCode, child);
 154                                 }
 155
 156                                 if (code < 100 || code >= 1000)
 157                                         ThrowException ("Invalid value for 'statusCode': " + code, child);
 158
 159                                 config [code] = redirect;
 160                         }
 161
 162                         return config;
 163                 }
 164
 165                 // To save some typing...
 166                 static string AttValue (string name, XmlNode node, bool optional, bool allowEmpty)
 167                 {
 168                         return HandlersUtil.ExtractAttributeValue (name, node, optional, allowEmpty);
 169                 }
 170
 171                 static string AttValue (string name, XmlNode node)
 172                 {
 173                         return HandlersUtil.ExtractAttributeValue (name, node, true);
 174                 }
 175
 176                 static void ThrowException (string message, XmlNode node)
 177                 {
 178                         HandlersUtil.ThrowException (message, node);
 179                 }
 180                 //
 181         }
 182 }
 183