| // Copyright 2013 Google Inc. All Rights Reserved. |
| // |
| // 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 com.google.enterprise.adaptor; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.sun.net.httpserver.Filter; |
| import com.sun.net.httpserver.Headers; |
| import com.sun.net.httpserver.HttpExchange; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** Filter that logs requests and responses. */ |
| class LoggingFilter extends Filter { |
| private static final Logger log |
| = Logger.getLogger(LoggingFilter.class.getName()); |
| |
| @Override |
| public String description() { |
| return "Filter that logs requests and responses"; |
| } |
| |
| @Override |
| public void doFilter(HttpExchange ex, Filter.Chain chain) throws IOException { |
| try { |
| log.fine("beginning"); |
| logRequest(ex); |
| log.log(Level.FINE, "Processing context for request is {0}", |
| ex.getHttpContext().getHandler().getClass().getName()); |
| chain.doFilter(ex); |
| } catch (RuntimeException e) { |
| log.log(Level.WARNING, "Unexpected exception during request", e); |
| throw e; |
| } catch (IOException e) { |
| log.log(Level.WARNING, "Unexpected exception during request", e); |
| throw e; |
| } finally { |
| logResponse(ex); |
| log.fine("ending"); |
| } |
| } |
| |
| private void logRequest(HttpExchange ex) { |
| if (log.isLoggable(Level.FINER)) { |
| log.log(Level.FINER, "Received {1} request to {0}. Headers: '{'{2}'}'", |
| new Object[] {ex.getRequestURI(), ex.getRequestMethod(), |
| getLoggableHeaders(ex.getRequestHeaders())}); |
| } |
| } |
| |
| private void logResponse(HttpExchange ex) { |
| if (log.isLoggable(Level.FINER)) { |
| log.log(Level.FINER, "Responded to {1} request {0}. Headers: '{'{2}'}'", |
| new Object[] {ex.getRequestURI(), ex.getRequestMethod(), |
| getLoggableHeaders(ex.getResponseHeaders())}); |
| } |
| } |
| |
| @VisibleForTesting |
| String getLoggableHeaders(Headers headers) { |
| if (headers.isEmpty()) { |
| return ""; |
| } |
| StringBuilder sb = new StringBuilder(); |
| for (Map.Entry<String, List<String>> me : headers.entrySet()) { |
| for (String value : me.getValue()) { |
| sb.append(me.getKey()); |
| sb.append(": "); |
| sb.append(value); |
| sb.append(", "); |
| } |
| } |
| // Cut off trailing ", " |
| return sb.substring(0, sb.length() - 2); |
| } |
| } |