postheadericon 11. Write a Servlet to display all the headers available from request.


import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import javax.servlet.annotation.WebServlet;

/** Showing all request headers of current request. */

@WebServlet(
name="WTAD",
urlPatterns={"/Ex11","/bipinrupadiya.blogspot.com","/RequestHeaders"}
)
public class ShowRequestHeaders extends HttpServlet {
  public void doGet(HttpServletRequest request,HttpServletResponse response)
      throws ServletException, IOException
{
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    String title = "GTU : Ex-11 : Showing all Request Headers";
    out.println("<HTML>\n" +
                "<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
                "<BODY BGCOLOR=\"#FDF5E6\">\n" +
                "<H1 ALIGN=\"CENTER\">" + title + "</H1>\n" +
                "<B>Request Method: </B>" +
                request.getMethod() + "<BR>\n" +
                "<B>Request URI: </B>" +
                request.getRequestURI() + "<BR>\n" +
                "<B>Request Protocol: </B>" +
                request.getProtocol() + "<BR><BR>\n" +
                "<TABLE BORDER=1 ALIGN=\"CENTER\">\n" +
                "<TR BGCOLOR=\"#FFAD00\">\n" +
                "<TH>Header Name<TH>Header Value");
    Enumeration headerNames = request.getHeaderNames();
    while(headerNames.hasMoreElements()) {
      String headerName = (String)headerNames.nextElement();
      out.println("<TR><TD>" + headerName);
      out.println("    <TD>" + request.getHeader(headerName));
    }
    out.println("</TABLE>\n</BODY></HTML>");
  }


  public void doPost(HttpServletRequest request,HttpServletResponse response)
      throws ServletException, IOException {
    doGet(request, response);
  }
}

output

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