| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.falcon.security; |
| |
| import org.apache.falcon.aspect.GenericAlert; |
| import org.apache.falcon.entity.v0.SchemaHelper; |
| import org.apache.falcon.util.Servlets; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.util.Date; |
| import java.util.UUID; |
| |
| /** |
| * This records audit information as part of the filter after processing the request |
| * and also introduces a UUID into request and response for tracing requests in logs. |
| */ |
| public class FalconAuditFilter implements Filter { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(FalconAuditFilter.class); |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| LOG.info("FalconAuditFilter initialization started"); |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, |
| ServletResponse response, |
| FilterChain filterChain) throws IOException, ServletException { |
| final String requestTimeISO9601 = SchemaHelper.formatDateUTC(new Date()); |
| final HttpServletRequest httpRequest = (HttpServletRequest) request; |
| final String requestId = UUID.randomUUID().toString(); |
| final Thread currentThread = Thread.currentThread(); |
| final String oldName = currentThread.getName(); |
| |
| try { |
| currentThread.setName(formatName(oldName, requestId)); |
| filterChain.doFilter(request, response); |
| } finally { |
| recordAudit(httpRequest, requestTimeISO9601); |
| |
| // put the request id into the response so users can trace logs for this request |
| ((HttpServletResponse) response).setHeader(Servlets.REQUEST_ID, requestId); |
| CurrentUser.clear(); |
| currentThread.setName(oldName); |
| } |
| } |
| |
| private String formatName(String oldName, String requestId) { |
| return oldName + " - " + requestId; |
| } |
| |
| private void recordAudit(HttpServletRequest httpRequest, String whenISO9601) { |
| final String who = getUserFromRequest(httpRequest); |
| final String fromHost = httpRequest.getRemoteHost(); |
| final String fromAddress = httpRequest.getRemoteAddr(); |
| final String whatURL = Servlets.getRequestURL(httpRequest); |
| final String whatAddrs = httpRequest.getLocalAddr(); |
| |
| LOG.debug("Audit: {}/{} performed request {} ({}) at time {}", |
| who, fromAddress, whatURL, whatAddrs, whenISO9601); |
| GenericAlert.audit(who, fromAddress, fromHost, whatURL, whatAddrs, whenISO9601); |
| } |
| |
| private String getUserFromRequest(HttpServletRequest httpRequest) { |
| if (CurrentUser.isAuthenticated()) { |
| return CurrentUser.getAuthenticatedUser(); |
| } else { |
| // look for the user in the request |
| final String userFromRequest = Servlets.getUserFromRequest(httpRequest); |
| return userFromRequest == null ? "UNKNOWN" : userFromRequest; |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| // do nothing |
| } |
| } |