package coreservlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; /** Shows all the request headers sent on this * particular request. *

* Taken from Core Servlets and JavaServer Pages * from Prentice Hall and Sun Microsystems Press, * http://www.coreservlets.com/. * © 2000 Marty Hall; may be freely used or adapted. */ 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 = "Servlet Example: Showing Request Headers"; out.println(ServletUtilities.headWithTitle(title) + "\n" + "

" + title + "

\n" + "Request Method: " + request.getMethod() + "
\n" + "Request URI: " + request.getRequestURI() + "
\n" + "Request Protocol: " + request.getProtocol() + "

\n" + "\n" + "\n" + "

Header Name	Header Value"); Enumeration headerNames = request.getHeaderNames(); while(headerNames.hasMoreElements()) { String headerName = (String)headerNames.nextElement(); out.println("
" + headerName); out.println("	" + request.getHeader(headerName)); } out.println("

\n"); } /** Let the same servlet handle both GET and POST. */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }