public ScraperNode(XmlNode xmlNode, InternalScriptSettings settings)
{
this.xmlNode = xmlNode;
children = new List<ScraperNode>();
this.ScriptSettings = settings;
loadSuccess = loadChildren();
// try to load our node attrbute
foreach(Attribute currAttr in this.GetType().GetCustomAttributes(true))
if (currAttr is ScraperNodeAttribute) {
nodeSettings = (ScraperNodeAttribute) currAttr;
continue;
}
if (nodeSettings.LoadNameAttribute) {
// Load attributes
foreach (XmlAttribute attr in xmlNode.Attributes) {
switch (attr.Name) {
case "name":
name = attr.Value;
break;
}
}
// Validate NAME attribute
if (name == null) {
logger.Error("Missing NAME attribute on: " + xmlNode.OuterXml);
loadSuccess = false;
return;
}
// if it's a bad variable name we fail as well
if (Name.Contains(" ")) {
logger.Error("Invalid NAME attribute (no spaces allowed) \"" + Name + "\" for " + xmlNode.OuterXml);
loadSuccess = false;
return;
}
}
}
private void loadActionNodes()
{
InternalScriptSettings settings = new InternalScriptSettings();
settings.DebugMode = DebugMode;
settings.Cache = cache;
actionNodes = new Dictionary<string, ScraperNode>();
foreach (XmlNode currAction in xml.DocumentElement.SelectNodes("child::action")) {
ActionNode newNode = (ActionNode)ScraperNode.Load(currAction, settings);
if (newNode != null && newNode.LoadSuccess)
actionNodes[newNode.Name] = newNode;
else {
logger.Error("Error loading action node: " + currAction.OuterXml);
loadSuccessful = false;
}
}
}
public static ScraperNode Load(XmlNode xmlNode, InternalScriptSettings settings)
{
if (xmlNode == null || xmlNode.NodeType == XmlNodeType.Comment || xmlNode.NodeType == XmlNodeType.CDATA)
return null;
Type nodeType = null;
string nodeTypeName = xmlNode.Name;
// try to grab the type from our dictionary
if (nodeTypes.ContainsKey(nodeTypeName))
nodeType = nodeTypes[nodeTypeName];
// if it's not there, search the assembly for the type
else {
Type[] typeList = Assembly.GetExecutingAssembly().GetTypes();
foreach (Type currType in typeList)
foreach (Attribute currAttr in currType.GetCustomAttributes(true))
if (currAttr.GetType() == typeof(ScraperNodeAttribute) &&
nodeTypeName.Equals(((ScraperNodeAttribute)currAttr).NodeName)) {
// store our type and put it in our dictionary so we dont have to
// look it up again
nodeTypes[nodeTypeName] = currType;
nodeType = currType;
break;
}
}
// if we couldn't find anything log the unhandled node and exit
if (nodeType == null) {
logger.Error("Unsupported node type: " + xmlNode.OuterXml);
return null;
}
// try to create a new scraper node object
try {
ConstructorInfo constructor = nodeType.GetConstructor(new Type[] { typeof(XmlNode), typeof(InternalScriptSettings) });
ScraperNode newNode = (ScraperNode)constructor.Invoke(new object[] { xmlNode, settings });
return newNode;
}
catch (Exception e) {
if (e.GetType() == typeof(ThreadAbortException))
throw e;
logger.Error("Error instantiating ScraperNode based on: " + xmlNode.OuterXml, e);
return null;
}
}
