| /* |
| * 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.logging.log4j.audit.rest; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.ThreadContext; |
| import org.apache.logging.log4j.audit.request.ChainedMapping; |
| import org.apache.logging.log4j.audit.request.RequestContextMapping; |
| import org.apache.logging.log4j.audit.request.RequestContextMappings; |
| import org.springframework.web.servlet.HandlerInterceptor; |
| import org.springframework.web.servlet.ModelAndView; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.util.Enumeration; |
| |
| /** |
| * May be used instead of the RequestContextFilter to convert RequestContext headers to ThreadContext variables. |
| */ |
| public class RequestContextHandlerInterceptor implements HandlerInterceptor { |
| |
| private static final Logger logger = LogManager.getLogger(RequestContextHandlerInterceptor.class); |
| private final RequestContextMappings mappings; |
| private final ThreadLocal<Long> startTime = new ThreadLocal<>(); |
| |
| public RequestContextHandlerInterceptor(Class<?> clazz) { |
| mappings = new RequestContextMappings(clazz); |
| } |
| |
| @Override |
| public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) { |
| logger.trace("Starting request {}", request.getRequestURI()); |
| Enumeration<String> headers = request.getHeaderNames(); |
| while (headers.hasMoreElements()) { |
| String name = headers.nextElement(); |
| RequestContextMapping mapping = mappings.getMappingByHeader(name); |
| logger.debug("Got Mapping:{} for Header:{}", mapping, name); |
| if (mapping != null) { |
| if (mapping.isChained()) { |
| ThreadContext.put(mapping.getChainKey(), request.getHeader(name)); |
| logger.debug("Setting Context Key:{} with value:{}", mapping.getChainKey(), request.getHeader(name)); |
| String value = ((ChainedMapping) mapping).getSupplier().get(); |
| ThreadContext.put(mapping.getFieldName(), value); |
| logger.debug("Setting Context Key:{} with value:{}", mapping.getFieldName(), value); |
| } else { |
| ThreadContext.put(mapping.getFieldName(), request.getHeader(name)); |
| logger.debug("Setting Context Key:{} with value:{}", mapping.getFieldName(), request.getHeader(name)); |
| } |
| } |
| } |
| if (logger.isTraceEnabled()) { |
| startTime.set(System.nanoTime()); |
| } |
| return true; |
| } |
| |
| @Override |
| public void postHandle(HttpServletRequest request, HttpServletResponse response, Object o, ModelAndView modelAndView) { |
| if (logger.isTraceEnabled()) { |
| long elapsed = System.nanoTime() - startTime.get(); |
| StringBuilder sb = new StringBuilder("Request ").append(request.getRequestURI()).append(" completed in "); |
| ElapsedUtil.addElapsed(elapsed, sb); |
| logger.trace(sb.toString()); |
| startTime.remove(); |
| } |
| } |
| |
| @Override |
| public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) { |
| ThreadContext.clearMap(); |
| } |
| } |