| /* |
| * 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 java.io.IOException; |
| import java.text.DecimalFormat; |
| import java.util.Enumeration; |
| |
| 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 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; |
| |
| /** |
| * Filter to initialize and clear the RequestContext. |
| */ |
| public class RequestContextFilter implements Filter { |
| |
| private static final Logger logger = LogManager.getLogger(RequestContextFilter.class); |
| private final Class<?> requestContextClass; |
| private RequestContextMappings mappings; |
| |
| public RequestContextFilter() { |
| requestContextClass = null; |
| } |
| |
| public RequestContextFilter(Class<?> clazz) { |
| requestContextClass = clazz; |
| } |
| |
| /** |
| * @param filterConfig |
| * @throws ServletException |
| */ |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| if (requestContextClass != null) { |
| mappings = new RequestContextMappings(requestContextClass); |
| } else { |
| String requestContextClassName = filterConfig.getInitParameter("requestContextClass"); |
| if (requestContextClassName == null) { |
| logger.error("No RequestContext class name was provided"); |
| throw new IllegalArgumentException("No RequestContext class name provided"); |
| } |
| mappings = new RequestContextMappings(requestContextClassName); |
| } |
| } |
| |
| /** |
| * Manages the initialization and clearing of the RequestContext. |
| */ |
| public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) |
| throws IOException, ServletException { |
| if (servletRequest instanceof HttpServletRequest) { |
| HttpServletRequest request = (HttpServletRequest) servletRequest; |
| HttpServletResponse response = (HttpServletResponse) servletResponse; |
| logger.info("Starting request {}", request.getRequestURI()); |
| try { |
| Enumeration headers = request.getHeaderNames(); |
| while (headers.hasMoreElements()) { |
| String name = (String) 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)); |
| } |
| } |
| } |
| long start = System.nanoTime(); |
| filterChain.doFilter(servletRequest, servletResponse); |
| long elapsed = System.nanoTime() - start; |
| StringBuilder sb = new StringBuilder("Request ").append(request.getRequestURI()).append(" completed in "); |
| ElapsedUtil.addElapsed(elapsed, sb); |
| logger.info(sb.toString()); |
| } catch (Throwable e) { |
| logger.error("Application cascaded error", e); |
| response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
| } finally { |
| ThreadContext.clearMap(); |
| } |
| } |
| } |
| |
| public void destroy() { |
| } |
| } |