1 2 import java.io.IOException; 3 import java.io.PrintWriter; 4 import java.util.Enumeration; 5 6 import javax.servlet.ServletConfig; 7 import javax.servlet.ServletException; 8 import javax.servlet.annotation.WebServlet; 9 import javax.servlet.http.HttpServlet; 10 import javax.servlet.http.HttpServletRequest; 11 import javax.servlet.http.HttpServletResponse; 12 13 @WebServlet("/") 14 public class app extends HttpServlet 15 { 16 @Override doGet(HttpServletRequest request, HttpServletResponse response)17 public void doGet(HttpServletRequest request, HttpServletResponse response) 18 throws IOException, ServletException 19 { 20 Enumeration<String> header_names = request.getHeaderNames(); 21 22 for (int i = 0; header_names.hasMoreElements(); i++) { 23 response.addHeader("X-Reply-" + Integer.toString(i), 24 header_names.nextElement()); 25 } 26 } 27 } 28