<%@ page
errorPage="errorpge.jsp"
import="java.io.*"
import="java.util.*"
%>
<%
Enumeration enames;
Map map;
String title;
// Print the request headers
map = new TreeMap();
enames = request.getHeaderNames();
while (enames.hasMoreElements()) {
String name = (String) enames.nextElement();
String value = request.getHeader(name);
map.put(name, value);
}
out.println(createTable(map, "Request Headers"));
// Print the session attributes
map = new TreeMap();
enames = session.getAttributeNames();
while (enames.hasMoreElements()) {
String name = (String) enames.nextElement();
String value = "" + session.getAttribute(name);
map.put(name, value);
}
out.println(createTable(map, "Session Attributes"));
%>
<%-- Define a method to create an HTML table --%>
<%!
private static String createTable(Map map, String title)
{
StringBuffer sb = new StringBuffer();
// Generate the header lines
sb.append("
");
sb.append("
");
sb.append("
");
sb.append(title);
sb.append("
");
sb.append("
");
// Generate the table rows
Iterator imap = map.entrySet().iterator();
while (imap.hasNext()) {
Map.Entry entry = (Map.Entry) imap.next();
String key = (String) entry.getKey();
String value = (String) entry.getValue();
sb.append("
");
sb.append("
");
sb.append(key);
sb.append("
");
sb.append("
");
sb.append(value);
sb.append("
");
sb.append("
");
}
// Generate the footer lines
sb.append("
");
// Return the generated HTML
return sb.toString();
}
%>
<%
Integer counter = (Integer)session.getAttribute("counter");
if (counter == null) {
counter = new Integer(1);
} else {
counter = new Integer(counter.intValue() + 1);
}
session.setAttribute("counter", counter);
%>
Using Sessions to Track Users
Session ID: <%=session.getId()%>
Session creation time: <%=new Date(session.getCreationTime())%>
Last accessed time: <%=new Date(session.getLastAccessedTime())%>
Number of times you've been here: <%=counter%>