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namespace Nwc.XmlRpc
{
using System;
using System.Collections;
using System.IO;
using System.Xml;
using System.Globalization;
/// <summary>Parser context, we maintain contexts in a stack to avoiding recursion. </summary>
struct Context
{
public String Name;
public Object Container;
}
/// <summary>Basic XML-RPC data deserializer.</summary>
/// <remarks>Uses <c>XmlTextReader</c> to parse the XML data. This level of the class
/// only handles the tokens common to both Requests and Responses. This class is not useful in and of itself
/// but is designed to be subclassed.</remarks>
public class XmlRpcDeserializer : XmlRpcXmlTokens
{
private static DateTimeFormatInfo _dateFormat = new DateTimeFormatInfo();
private Object _container;
private Stack _containerStack;
/// <summary>Protected reference to last text.</summary>
protected String _text;
/// <summary>Protected reference to last deserialized value.</summary>
protected Object _value;
/// <summary>Protected reference to last name field.</summary>
protected String _name;
/// <summary>Basic constructor.</summary>
public XmlRpcDeserializer()
{
Reset();
_dateFormat.FullDateTimePattern = ISO_DATETIME;
}
/// <summary>Static method that parses XML data into a response using the Singleton.</summary>
/// <param name="xmlData"><c>StreamReader</c> containing an XML-RPC response.</param>
/// <returns><c>Object</c> object resulting from the deserialization.</returns>
virtual public Object Deserialize(TextReader xmlData)
{
return null;
}
/// <summary>Protected method to parse a node in an XML-RPC XML stream.</summary>
/// <remarks>Method deals with elements common to all XML-RPC data, subclasses of
/// this object deal with request/response spefic elements.</remarks>
/// <param name="reader"><c>XmlTextReader</c> of the in progress parsing data stream.</param>
protected void DeserializeNode(XmlTextReader reader)
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
if (Logger.Delegate != null)
Logger.WriteEntry("START " + reader.Name, LogLevel.Information);
switch (reader.Name)
{
case VALUE:
_value = null;
_text = null;
break;
case STRUCT:
PushContext();
_container = new Hashtable();
break;
case ARRAY:
PushContext();
_container = new ArrayList();
break;
}
break;
case XmlNodeType.EndElement:
if (Logger.Delegate != null)
Logger.WriteEntry("END " + reader.Name, LogLevel.Information);
switch (reader.Name)
{
case BASE64:
_value = Convert.FromBase64String(_text);
break;
case BOOLEAN:
int val = Int16.Parse(_text);
if (val == 0)
_value = false;
else if (val == 1)
_value = true;
break;
case STRING:
_value = _text;
break;
case DOUBLE:
_value = Double.Parse(_text);
break;
case INT:
case ALT_INT:
_value = Int32.Parse(_text);
break;
case DATETIME:
#if __MONO__
_value = DateParse(_text);
#else
_value = DateTime.ParseExact(_text, "F", _dateFormat);
#endif
break;
case NAME:
_name = _text;
break;
case VALUE:
if (_value == null)
_value = _text; // some kits don't use <string> tag, they just do <value>
if ((_container != null) && (_container is IList)) // in an array? If so add value to it.
((IList)_container).Add(_value);
break;
case MEMBER:
if ((_container != null) && (_container is IDictionary)) // in an struct? If so add value to it.
((IDictionary)_container).Add(_name, _value);
break;
case ARRAY:
case STRUCT:
_value = _container;
PopContext();
break;
}
break;
case XmlNodeType.Text:
if (Logger.Delegate != null)
Logger.WriteEntry("Text " + reader.Value, LogLevel.Information);
_text = reader.Value;
break;
default:
break;
}
}
/// <summary>Static method that parses XML in a <c>String</c> into a
/// request using the Singleton.</summary>
/// <param name="xmlData"><c>String</c> containing an XML-RPC request.</param>
/// <returns><c>XmlRpcRequest</c> object resulting from the parse.</returns>
public Object Deserialize(String xmlData)
{
StringReader sr = new StringReader(xmlData);
return Deserialize(sr);
}
/// <summary>Pop a Context of the stack, an Array or Struct has closed.</summary>
private void PopContext()
{
Context c = (Context)_containerStack.Pop();
_container = c.Container;
_name = c.Name;
}
/// <summary>Push a Context on the stack, an Array or Struct has opened.</summary>
private void PushContext()
{
Context context;
context.Container = _container;
context.Name = _name;
_containerStack.Push(context);
}
/// <summary>Reset the internal state of the deserializer.</summary>
protected void Reset()
{
_text = null;
_value = null;
_name = null;
_container = null;
_containerStack = new Stack();
}
#if __MONO__
private DateTime DateParse(String str)
{
int year = Int32.Parse(str.Substring(0,4));
int month = Int32.Parse(str.Substring(4,2));
int day = Int32.Parse(str.Substring(6,2));
int hour = Int32.Parse(str.Substring(9,2));
int min = Int32.Parse(str.Substring(12,2));
int sec = Int32.Parse(str.Substring(15,2));
return new DateTime(year,month,day,hour,min,sec);
}
#endif
}
}
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