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1/*
2* Copyright (c) Contributors, http://www.openmetaverse.org/
3* See CONTRIBUTORS.TXT for a full list of copyright holders.
4*
5* Redistribution and use in source and binary forms, with or without
6* modification, are permitted provided that the following conditions are met:
7* * Redistributions of source code must retain the above copyright
8* notice, this list of conditions and the following disclaimer.
9* * Redistributions in binary form must reproduce the above copyright
10* notice, this list of conditions and the following disclaimer in the
11* documentation and/or other materials provided with the distribution.
12* * Neither the name of the OpenSim Project nor the
13* names of its contributors may be used to endorse or promote products
14* derived from this software without specific prior written permission.
15*
16* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS AND ANY
17* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*
27*/
28namespace Nwc.XmlRpc
29{
30 using System;
31 using System.Collections;
32 using System.IO;
33 using System.Xml;
34 using System.Globalization;
35
36 /// <summary>Parser context, we maintain contexts in a stack to avoiding recursion. </summary>
37 struct Context
38 {
39 public String Name;
40 public Object Container;
41 }
42
43 /// <summary>Basic XML-RPC data deserializer.</summary>
44 /// <remarks>Uses <c>XmlTextReader</c> to parse the XML data. This level of the class
45 /// only handles the tokens common to both Requests and Responses. This class is not useful in and of itself
46 /// but is designed to be subclassed.</remarks>
47 public class XmlRpcDeserializer : XmlRpcXmlTokens
48 {
49 private static DateTimeFormatInfo _dateFormat = new DateTimeFormatInfo();
50
51 private Object _container;
52 private Stack _containerStack;
53
54 /// <summary>Protected reference to last text.</summary>
55 protected String _text;
56 /// <summary>Protected reference to last deserialized value.</summary>
57 protected Object _value;
58 /// <summary>Protected reference to last name field.</summary>
59 protected String _name;
60
61
62 /// <summary>Basic constructor.</summary>
63 public XmlRpcDeserializer()
64 {
65 Reset();
66 _dateFormat.FullDateTimePattern = ISO_DATETIME;
67 }
68
69 /// <summary>Static method that parses XML data into a response using the Singleton.</summary>
70 /// <param name="xmlData"><c>StreamReader</c> containing an XML-RPC response.</param>
71 /// <returns><c>Object</c> object resulting from the deserialization.</returns>
72 virtual public Object Deserialize(TextReader xmlData)
73 {
74 return null;
75 }
76
77 /// <summary>Protected method to parse a node in an XML-RPC XML stream.</summary>
78 /// <remarks>Method deals with elements common to all XML-RPC data, subclasses of
79 /// this object deal with request/response spefic elements.</remarks>
80 /// <param name="reader"><c>XmlTextReader</c> of the in progress parsing data stream.</param>
81 protected void DeserializeNode(XmlTextReader reader)
82 {
83 switch (reader.NodeType)
84 {
85 case XmlNodeType.Element:
86 if (Logger.Delegate != null)
87 Logger.WriteEntry("START " + reader.Name, LogLevel.Information);
88 switch (reader.Name)
89 {
90 case VALUE:
91 _value = null;
92 _text = null;
93 break;
94 case STRUCT:
95 PushContext();
96 _container = new Hashtable();
97 break;
98 case ARRAY:
99 PushContext();
100 _container = new ArrayList();
101 break;
102 }
103 break;
104 case XmlNodeType.EndElement:
105 if (Logger.Delegate != null)
106 Logger.WriteEntry("END " + reader.Name, LogLevel.Information);
107 switch (reader.Name)
108 {
109 case BASE64:
110 _value = Convert.FromBase64String(_text);
111 break;
112 case BOOLEAN:
113 int val = Int16.Parse(_text);
114 if (val == 0)
115 _value = false;
116 else if (val == 1)
117 _value = true;
118 break;
119 case STRING:
120 _value = _text;
121 break;
122 case DOUBLE:
123 _value = Double.Parse(_text);
124 break;
125 case INT:
126 case ALT_INT:
127 _value = Int32.Parse(_text);
128 break;
129 case DATETIME:
130#if __MONO__
131 _value = DateParse(_text);
132#else
133 _value = DateTime.ParseExact(_text, "F", _dateFormat);
134#endif
135 break;
136 case NAME:
137 _name = _text;
138 break;
139 case VALUE:
140 if (_value == null)
141 _value = _text; // some kits don't use <string> tag, they just do <value>
142
143 if ((_container != null) && (_container is IList)) // in an array? If so add value to it.
144 ((IList)_container).Add(_value);
145 break;
146 case MEMBER:
147 if ((_container != null) && (_container is IDictionary)) // in an struct? If so add value to it.
148 ((IDictionary)_container).Add(_name, _value);
149 break;
150 case ARRAY:
151 case STRUCT:
152 _value = _container;
153 PopContext();
154 break;
155 }
156 break;
157 case XmlNodeType.Text:
158 if (Logger.Delegate != null)
159 Logger.WriteEntry("Text " + reader.Value, LogLevel.Information);
160 _text = reader.Value;
161 break;
162 default:
163 break;
164 }
165 }
166
167 /// <summary>Static method that parses XML in a <c>String</c> into a
168 /// request using the Singleton.</summary>
169 /// <param name="xmlData"><c>String</c> containing an XML-RPC request.</param>
170 /// <returns><c>XmlRpcRequest</c> object resulting from the parse.</returns>
171 public Object Deserialize(String xmlData)
172 {
173 StringReader sr = new StringReader(xmlData);
174 return Deserialize(sr);
175 }
176
177 /// <summary>Pop a Context of the stack, an Array or Struct has closed.</summary>
178 private void PopContext()
179 {
180 Context c = (Context)_containerStack.Pop();
181 _container = c.Container;
182 _name = c.Name;
183 }
184
185 /// <summary>Push a Context on the stack, an Array or Struct has opened.</summary>
186 private void PushContext()
187 {
188 Context context;
189
190 context.Container = _container;
191 context.Name = _name;
192
193 _containerStack.Push(context);
194 }
195
196 /// <summary>Reset the internal state of the deserializer.</summary>
197 protected void Reset()
198 {
199 _text = null;
200 _value = null;
201 _name = null;
202 _container = null;
203 _containerStack = new Stack();
204 }
205
206#if __MONO__
207 private DateTime DateParse(String str)
208 {
209 int year = Int32.Parse(str.Substring(0,4));
210 int month = Int32.Parse(str.Substring(4,2));
211 int day = Int32.Parse(str.Substring(6,2));
212 int hour = Int32.Parse(str.Substring(9,2));
213 int min = Int32.Parse(str.Substring(12,2));
214 int sec = Int32.Parse(str.Substring(15,2));
215 return new DateTime(year,month,day,hour,min,sec);
216 }
217#endif
218
219 }
220}
221
222
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