public void TestExpandEntity ()
{
string intSubset = "<!ELEMENT root (#PCDATA)><!ATTLIST root foo CDATA 'foo-def' bar CDATA 'bar-def'><!ENTITY ent 'entity string'>";
string dtd = "<!DOCTYPE root [" + intSubset + "]>";
string xml = dtd + "<root foo='&ent;' bar='internal &ent; value'>&ent;</root>";
dvr = PrepareXmlReader (xml);
dvr.EntityHandling = EntityHandling.ExpandEntities;
dvr.Read (); // DTD
dvr.Read ();
Assert.AreEqual (XmlNodeType.Element, dvr.NodeType);
Assert.AreEqual ("root", dvr.Name);
Assert.IsTrue (dvr.MoveToFirstAttribute ());
Assert.AreEqual ("foo", dvr.Name);
Assert.AreEqual ("entity string", dvr.Value);
Assert.IsTrue (dvr.MoveToNextAttribute ());
Assert.AreEqual ("bar", dvr.Name);
Assert.AreEqual ("internal entity string value", dvr.Value);
Assert.AreEqual ("entity string", dvr.ReadString ());
// ValidationType = None
dvr = PrepareXmlReader (xml);
dvr.EntityHandling = EntityHandling.ExpandEntities;
dvr.ValidationType = ValidationType.None;
dvr.Read (); // DTD
dvr.Read ();
Assert.AreEqual (XmlNodeType.Element, dvr.NodeType);
Assert.AreEqual ("root", dvr.Name);
Assert.IsTrue (dvr.MoveToFirstAttribute ());
Assert.AreEqual ("foo", dvr.Name);
Assert.AreEqual ("entity string", dvr.Value);
Assert.IsTrue (dvr.MoveToNextAttribute ());
Assert.AreEqual ("bar", dvr.Name);
Assert.AreEqual ("internal entity string value", dvr.Value);
Assert.AreEqual ("entity string", dvr.ReadString ());
}
/// <summary>
/// takes in raw xml string and attempts to parse it into a workable hash.
/// all valid xml for the gateway contains
/// <transaction><fields><field key="attribute name">value</field></fields></transaction>
/// there will be 1 or more (should always be more than 1 to be valid) field tags
/// this method will take the attribute name and make that the hash key and then the value is the value
/// if an error occurs then the error key will be added to the hash.
/// </summary>
/// <param name="xml"></param>
/// <returns></returns>
private Hashtable parseXML(string xml)
{
Hashtable ret_hash = new Hashtable(); //stores key values to return
XmlTextReader txtreader = null;
XmlValidatingReader reader = null;
if (xml != null && xml.Length > 0)
{
try
{
//Implement the readers.
txtreader = new XmlTextReader(new System.IO.StringReader(xml));
reader = new XmlValidatingReader(txtreader);
//Parse the XML and display the text content of each of the elements.
while (reader.Read())
{
if (reader.IsStartElement() && reader.Name.ToLower() == "field")
{
if (reader.HasAttributes)
{
//we want the key attribute value
ret_hash[reader.GetAttribute(0).ToLower()] = reader.ReadString();
}
else
{
ret_hash["error"] = "All FIELD tags must contains a KEY attribute.";
}
}
} //ends while
}
catch (Exception e)
{
//handle exceptions
ret_hash["error"] = e.Message;
}
finally
{
if (reader != null) reader.Close();
}
}
else
{
//incoming xml is empty
ret_hash["error"] = "No data was present. Valid XML must be sent in order to process a transaction.";
}
return ret_hash;
}
