XML Server Getting Started    

This exercise requires additional file   EchoLogon.jsp: 

<%@ page  import=" 

java.io.*, 

javax.servlet.*, 

javax.servlet.http.*, 

org.w3c.dom.*, 

org.apache.xerces.parsers.DOMParser, 

org.xml.sax.*,com.cti.util.*, 

com.cti.xmlsp.XPathAPI, 

com.cti.*"%> 

<%! 

  String getStackTraceAsString(Exception e)  { 

    ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 

    PrintWriter writer = new PrintWriter(bytes, true); 

    e.printStackTrace(writer); 

    return bytes.toString(); 

  } 

  String getAttribute(Node node, String attribute) { 

    String result=""; 

    NamedNodeMap attrMap = node.getAttributes();  

    Attr attr = null; 

    if (attrMap!=null) { 

attr = (Attr) attrMap.getNamedItem(attribute);  

if (attr!=null) result = attr.getValue();  

    } 

    return result; 

  }  

  String getNodeValue(Node node) { 

     String result=""; 

     if (node!=null) { 

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