| /* |
| * 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.storm.daemon.logviewer.utils; |
| |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.Meter; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import javax.ws.rs.core.Response; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.apache.storm.metric.StormMetricsRegistry; |
| |
| |
| public class LogFileDownloader { |
| private final Histogram fileDownloadSizeDistMb; |
| private final Meter numFileDownloadExceptions; |
| private final Path logRoot; |
| private final Path daemonLogRoot; |
| private final ResourceAuthorizer resourceAuthorizer; |
| |
| /** |
| * Constructor. |
| * |
| * @param logRoot root worker log directory |
| * @param daemonLogRoot root daemon log directory |
| * @param resourceAuthorizer {@link ResourceAuthorizer} |
| * @param metricsRegistry The logviewer metrics registry |
| */ |
| public LogFileDownloader(String logRoot, String daemonLogRoot, ResourceAuthorizer resourceAuthorizer, |
| StormMetricsRegistry metricsRegistry) { |
| this.logRoot = Paths.get(logRoot).toAbsolutePath().normalize(); |
| this.daemonLogRoot = Paths.get(daemonLogRoot).toAbsolutePath().normalize(); |
| this.resourceAuthorizer = resourceAuthorizer; |
| this.fileDownloadSizeDistMb = metricsRegistry.registerHistogram("logviewer:download-file-size-rounded-MB"); |
| this.numFileDownloadExceptions = metricsRegistry.registerMeter(ExceptionMeterNames.NUM_FILE_DOWNLOAD_EXCEPTIONS); |
| } |
| |
| /** |
| * Checks authorization for the log file and download. |
| * |
| * @param host host address |
| * @param fileName file to download |
| * @param user username |
| * @param isDaemon true if the file is a daemon log, false if the file is an worker log |
| * @return a Response which lets browsers download that file. |
| */ |
| public Response downloadFile(String host, String fileName, String user, boolean isDaemon) throws IOException { |
| Path rootDir = isDaemon ? daemonLogRoot : logRoot; |
| Path rawFile = rootDir.resolve(fileName); |
| Path file = rawFile.toAbsolutePath().normalize(); |
| if (!file.startsWith(rootDir) || !rawFile.normalize().toString().equals(rawFile.toString())) { |
| //Ensure filename doesn't contain ../ parts |
| return LogviewerResponseBuilder.buildResponsePageNotFound(); |
| } |
| if (isDaemon && Paths.get(fileName).getNameCount() != 1) { |
| //Prevent daemon log reads from pathing into worker logs |
| return LogviewerResponseBuilder.buildResponsePageNotFound(); |
| } |
| |
| if (file.toFile().exists()) { |
| if (isDaemon || resourceAuthorizer.isUserAllowedToAccessFile(user, fileName)) { |
| fileDownloadSizeDistMb.update(Math.round((double) file.toFile().length() / FileUtils.ONE_MB)); |
| String downloadedFileName; |
| Path pathRelativeToRootDir = rootDir.relativize(file); |
| if (isDaemon || pathRelativeToRootDir.getNameCount() != 3) { |
| downloadedFileName = host + "-" + rawFile.getFileName(); |
| } else { |
| //host-topoId-port-fileName |
| downloadedFileName = host + "-" |
| + pathRelativeToRootDir.getName(0) + "-" |
| + pathRelativeToRootDir.getName(1) + "-" |
| + pathRelativeToRootDir.getName(2); |
| } |
| return LogviewerResponseBuilder.buildDownloadFile(downloadedFileName, file.toFile(), numFileDownloadExceptions); |
| } else { |
| return LogviewerResponseBuilder.buildResponseUnauthorizedUser(user); |
| } |
| } else { |
| return LogviewerResponseBuilder.buildResponsePageNotFound(); |
| } |
| } |
| |
| } |