/* * Copyright 1999-2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ // If this class were in a package, it would need to go in the // corresponding subdirectory import java.io.IOException; import java.io.PrintWriter; import java.util.Enumeration; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Simple servlet to validate that the Hello, World example can * execute servlets. In the web application deployment descriptor, * this servlet must be mapped to correspond to the link in the * "index.html" file. * * @author Craig R. McClanahan */ public final class Hello extends HttpServlet { /** * Respond to a GET request for the content produced by * this servlet. * * @param request The servlet request we are processing * @param response The servlet response we are producing * * @exception IOException if an input/output error occurs * @exception ServletException if a servlet error occurs */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType("text/html"); PrintWriter writer = response.getWriter(); writer.println(""); writer.println(""); writer.println("Sample Application Servlet Page"); writer.println(""); writer.println(""); writer.println(""); writer.println(""); writer.println(""); writer.println(""); writer.println(""); writer.println("

"); writer.println("

Sample Application Servlet

"); writer.println("This is the output of a servlet that is part of"); writer.println("the Hello, World application. It displays the"); writer.println("request headers from the request we are currently"); writer.println("processing."); writer.println("

"); writer.println(""); Enumeration names = request.getHeaderNames(); while (names.hasMoreElements()) { String name = (String) names.nextElement(); writer.println(""); writer.println(" "); writer.println(" "); writer.println(""); } writer.println("

" + name + ":	" + request.getHeader(name) + "

"); writer.println(""); writer.println(""); } }