I am trying to get an XHTML file loaded into an LINQ XElement. However, I am running into problems with the resolver. The problem has to do with the following definition:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
I have a custom XmlUrlResolver with an overridden GetEntity which converts links such as http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd to a local resource stream. This works fine for almost the entire XHTML DTD. The only one I am unable to actually resolve is the Uri "-//W3C//DTD XHTML 1.0 Transitional//EN" and I am not sure what I should be doing with it.
public override object GetEntity(Uri absoluteUri, string role, Type ofObjectToReturn)
{
var resourceName = "ePub.DTD." + absoluteUri.Segments[absoluteUri.Segments.GetLength(0) - 1];
if (_resources.Contains(resourceName))
{
Stream dataStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);
return dataStream;
}
return base.GetEntity(absoluteUri, role, ofObjectToReturn);
}
As you see in the above code, anything I cannot resolve is handled by the default XmlUrlResolver. This means the above link starting with -//W3C/. The base method however throws an DirectoryNotFoundException however. Continuing will load the XElement just fine. If I instead return an empty stream it causes an error to be throw during loading of the XHTML into the XElement.
Any clues someone might have about handling such a PUBLIC definition with a custom XmlUrlResolver?