| /** |
| * 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.metron.rest.web.filter; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.stereotype.Component; |
| import org.springframework.web.util.ContentCachingResponseWrapper; |
| import org.springframework.web.util.WebUtils; |
| |
| 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.HttpServletResponse; |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandles; |
| import java.nio.charset.StandardCharsets; |
| |
| /** |
| * Logs information about Http responses including status code and payload. |
| */ |
| @Component |
| public class ResponseLoggingFilter implements Filter { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Autowired |
| private ObjectMapper objectMapper; |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException { |
| if (LOG.isDebugEnabled()) { |
| response = new ContentCachingResponseWrapper((HttpServletResponse) response); |
| } |
| try { |
| filterChain.doFilter(request, response); |
| } finally { |
| if (LOG.isDebugEnabled()) { |
| int status = -1; |
| String responseBody = ""; |
| ContentCachingResponseWrapper wrapper = WebUtils.getNativeResponse(response, ContentCachingResponseWrapper.class); |
| if (wrapper != null) { |
| status = wrapper.getStatus(); |
| responseBody = new String(wrapper.getContentAsByteArray(), StandardCharsets.UTF_8); |
| // try to pretty print |
| try { |
| responseBody = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(objectMapper.readValue(responseBody, Object.class)); |
| } catch(Exception e) { |
| // if pretty printing fails or response is not json, just move on |
| } |
| // need to copy the response back since we're reading it here |
| wrapper.copyBodyToResponse(); |
| } |
| LOG.debug(String.format("response: status=%d;payload=%s", status, responseBody)); |
| } |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| } |