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

   1 //
   2 // System.Web.Configuration.AuthorizationConfigHandler
   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;
  32 using System.Collections;
  33 using System.Configuration;
  34 using System.Xml;
  35
  36 namespace System.Web.Configuration
  37 {
  38         class AuthorizationConfigHandler : IConfigurationSectionHandler
  39         {
  40                 public object Create (object parent, object context, XmlNode section)
  41                 {
  42                         AuthorizationConfig config = new AuthorizationConfig (parent);
  43
  44                         if (section.Attributes != null && section.Attributes.Count != 0)
  45                                 ThrowException ("Unrecognized attribute", section);
  46
  47                         XmlNodeList authNodes = section.ChildNodes;
  48                         foreach (XmlNode child in authNodes) {
  49                                 XmlNodeType ntype = child.NodeType;
  50                                 if (ntype != XmlNodeType.Element)
  51                                         continue;
  52
  53                                 string childName = child.Name;
  54                                 bool allow = (childName == "allow");
  55                                 bool deny = (childName == "deny");
  56                                 if (!allow && !deny)
  57                                         ThrowException ("Element name must be 'allow' or 'deny'.", child);
  58
  59                                 string users = AttValue ("users", child);
  60                                 string roles = AttValue ("roles", child);
  61                                 if (users == null && roles == null)
  62                                         ThrowException ("At least 'users' or 'roles' must be present.", child);
  63
  64                                 string verbs = AttValue ("verbs", child);
  65                                 if (child.Attributes != null && child.Attributes.Count != 0)
  66                                         ThrowException ("Unrecognized attribute.", child);
  67
  68                                 bool added;
  69                                 if (allow)
  70                                         added = config.Allow (users, roles, verbs);
  71                                 else
  72                                         added = config.Deny (users, roles, verbs);
  73
  74                                 if (!added)
  75                                         ThrowException ("User and role names cannot contain '?' or '*'.", child);
  76                         }
  77
  78                         return config;
  79                 }
  80
  81                 // A few methods to save some typing
  82                 static string AttValue (string name, XmlNode node, bool optional)
  83                 {
  84                         return HandlersUtil.ExtractAttributeValue (name, node, optional);
  85                 }
  86
  87                 static string AttValue (string name, XmlNode node)
  88                 {
  89                         return HandlersUtil.ExtractAttributeValue (name, node, true);
  90                 }
  91
  92                 static void ThrowException (string message, XmlNode node)
  93                 {
  94                         HandlersUtil.ThrowException (message, node);
  95                 }
  96                 //
  97
  98         }
  99 }
 100