public HTTPResponse Head(String file, String query, NVPair[] headers) throws IOException, ModuleException
public HTTPResponse Head(String file)  throws IOException, ModuleException
    public HTTPResponse Head(String file, String query, NVPair[] headers)		throws IOException, ModuleException    {	String File = stripRef(file);	if (query != null  &&  query.length() > 0)	    File += "?" + Codecs.URLEncode(query);	return setupRequest("HEAD", File, headers, null, null);    }