1 /* 2 * JBoss, Home of Professional Open Source 3 * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual 4 * contributors by the @authors tag. See the copyright.txt in the 5 * distribution for a full listing of individual contributors. 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.jboss.as.quickstarts.servlet.filterlistener; 18 19 import java.util.Map; 20 21 import javax.servlet.ServletContext; 22 import javax.servlet.ServletRequestEvent; 23 import javax.servlet.ServletRequestListener; 24 import javax.servlet.annotation.WebListener; 25 26 /** 27 * A simple request listener that dumps all the parameters of the HTTP requests. 28 * <p> 29 * Because Request Listeners see requests before Filters see them, this listener sees the original parameter values as sent by 30 * the user rather than the modified ones passed down the filter chain by {@link VowelRemoverFilter}. 31 * 32 * @author Jonathan Fuerth <jfuerth@redhat.com> 33 */ 34 @WebListener 35 public class ParameterDumpingRequestListener implements ServletRequestListener { 36 37 @Override 38 public void requestInitialized(ServletRequestEvent sre) { 39 Map<String, String[]> paramMap = sre.getServletRequest().getParameterMap(); 40 ServletContext servletContext = sre.getServletContext(); 41 42 // to see log messages at runtime, check the terminal window where you started JBoss AS. 43 servletContext.log("ParameterDumpingRequestListener: request has been initialized. It has " + paramMap.size() 44 + " parameters:"); 45 for (Map.Entry<String, String[]> entry : paramMap.entrySet()) { 46 for (String val : entry.getValue()) { 47 servletContext.log(" " + entry.getKey() + "=" + val); 48 } 49 } 50 } 51 52 @Override 53 public void requestDestroyed(ServletRequestEvent sre) { 54 sre.getServletContext().log("ParameterDumpingRequestListener: request has been destroyed"); 55 } 56 57 }