[Task] Add an extra check in Task.WaitAny to make sure the index returned is valid
[mono.git] / mcs / class / Mono.Http / Mono.Http.Configuration / AcceptEncodingSectionHandler.cs
1 //
2 // AcceptEncodingSectionHandler.cs
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.Configuration;
33 using System.IO;
34 using System.Xml;
35
36 namespace Mono.Http.Configuration
37 {
38         public class AcceptEncodingSectionHandler : IConfigurationSectionHandler
39         {
40                 public object Create (object parent, object configContext, XmlNode section)
41                 {
42                         AcceptEncodingConfig cfg = new AcceptEncodingConfig (parent as AcceptEncodingConfig);
43                         
44                         if (section.Attributes != null && section.Attributes.Count != 0)
45                                 ThrowException ("Unrecognized attribute", section);
46
47                         XmlNodeList nodes = section.ChildNodes;
48                         foreach (XmlNode child in nodes) {
49                                 XmlNodeType ntype = child.NodeType;
50                                 if (ntype == XmlNodeType.Whitespace || ntype == XmlNodeType.Comment)
51                                         continue;
52
53                                 if (ntype != XmlNodeType.Element)
54                                         ThrowException ("Only elements allowed", child);
55                                 
56                                 string name = child.Name;
57                                 if (name == "clear") {
58                                         if (child.Attributes != null && child.Attributes.Count != 0)
59                                                 ThrowException ("Unrecognized attribute", child);
60
61                                         cfg.Clear ();
62                                         continue;
63                                 }
64                                         
65                                 if (name != "add")
66                                         ThrowException ("Unexpected element", child);
67
68                                 string encoding = ExtractAttributeValue ("encoding", child, false);
69                                 string type = ExtractAttributeValue ("type", child, false);
70                                 string disabled = ExtractAttributeValue ("disabled", child, true);
71                                 if (disabled != null && disabled == "yes")
72                                         continue;
73
74                                 if (child.Attributes != null && child.Attributes.Count != 0)
75                                         ThrowException ("Unrecognized attribute", child);
76
77                                 cfg.Add (encoding, type);
78                         }
79
80                         return cfg;
81                 }
82
83                 static void ThrowException (string msg, XmlNode node)
84                 {
85                         if (node != null && node.Name != String.Empty)
86                                 msg = msg + " (node name: " + node.Name + ") ";
87
88                         throw new ConfigurationException (msg, node);
89                 }
90
91                 static string ExtractAttributeValue (string attKey, XmlNode node, bool optional)
92                 {
93                         if (node.Attributes == null) {
94                                 if (optional)
95                                         return null;
96
97                                 ThrowException ("Required attribute not found: " + attKey, node);
98                         }
99
100                         XmlNode att = node.Attributes.RemoveNamedItem (attKey);
101                         if (att == null) {
102                                 if (optional)
103                                         return null;
104                                 ThrowException ("Required attribute not found: " + attKey, node);
105                         }
106
107                         string value = att.Value;
108                         if (value == String.Empty) {
109                                 string opt = optional ? "Optional" : "Required";
110                                 ThrowException (opt + " attribute is empty: " + attKey, node);
111                         }
112
113                         return value;
114                 }
115         }
116 }
117