/*
* Copyright 2009-2014 PrimeTek.
*
* 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.
*/
package org.primefaces.showcase.filter;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.primefaces.push.EventBus;
import org.primefaces.push.EventBusFactory;
/**
* Filter to keep track of browsers of visitors, mapped to the demo page /push/chart.jsf
*/
public class UserAgentListener implements Filter {
private ServletContext context;
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
String agent = ((HttpServletRequest) req).getHeader("User-Agent");
if(agent != null) {
boolean match = false;
Map<String,Integer> agents = (Map) context.getAttribute("browserStats");
for (Map.Entry<String, Integer> entry : agents.entrySet()) {
String key = entry.getKey();
if(agent.indexOf(key) != -1) {
Integer value = agents.get(key);
agents.put(key, ++value);
match = true;
break;
}
}
if(match == false) {
Integer value = agents.get("Other");
agents.put("Other", ++value);
}
EventBus eventBus = EventBusFactory.getDefault().eventBus();
eventBus.publish("/browser", agents);
}
chain.doFilter(req, resp);
}
public void init(FilterConfig filterConfig) throws ServletException {
Map<String,Integer> agents = new LinkedHashMap<String, Integer>();
agents.put("MSIE", 0);
agents.put("Firefox", 0);
agents.put("Chrome", 0);
agents.put("Safari", 0);
agents.put("Other", 0);
context = filterConfig.getServletContext();
context.setAttribute("browserStats", agents);
}
public void destroy() {
}
}