Dr R Anurekha: elements and values of request object

Simple program to display elements and values in request object

import javax.servlet.http.*;

import javax.servlet.*;

import java.io.*;

import java.util.*;

public class Req_parameters extends HttpServlet

{

public void doGet(HttpServletRequest req,HttpServletResponse res)

throws ServletException, IOException

{

//setting the content type

res.setContentType("text/html");

//create the stream to write the data

PrintWriter pw=res.getWriter();

String addr = req.getRemoteAddr();

String host = req.getRemoteHost();

String pl = req.getProtocol();

boolean sec = req.isSecure();

StringBuffer req_url = req.getRequestURL();

//writing html in the stream

pw.println("<html><body>");

pw.println("<h2>Client Address = "+addr+"</br>");

pw.println("Client Name = "+host+"</br>");

pw.println("Protocol = "+pl+"</br>");

pw.println("Security = "+sec+"</br>");

pw.println("Request URL = "+req_url+"</br>");

pw.println("</br>");

pw.println("Header Fields: </br></h2>");

pw.println("<h3>");

String HdrName, HdrVal;

Enumeration Hdr = req.getHeaderNames();

if(Hdr==null)

pw.println("Unable to access Header...</br>");

else

{

while(Hdr.hasMoreElements())

{

HdrName = (String)Hdr.nextElement();

HdrVal = req.getHeader(HdrName);

pw.println(HdrName + " : " + HdrVal + "</br>");

}

pw.println("</h3>");

pw.println("</body></html>");

//closing the stream

pw.close();

}