281 lines
9.5 KiB
Java
281 lines
9.5 KiB
Java
/*
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* Copyright (C) 2023 Laurent CLOUET
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* Author Laurent CLOUET <laurent.clouet@nopnop.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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package com.sheepit.client;
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import com.sheepit.client.datamodel.Chunk;
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import lombok.AllArgsConstructor;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.FileSystemException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.nio.file.StandardCopyOption;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.ListIterator;
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@AllArgsConstructor
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public class DirectoryManager {
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private Configuration configuration;
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public String getActualStoragePathFor(Chunk chunk) {
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return isSharedEnabled() ? getSharedPathFor(chunk) : getCachePathFor(chunk);
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}
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public String getCachePathFor(Chunk chunk) {
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return configuration.getWoolCacheDirectory().getAbsolutePath() + File.separator + chunk.getId() + ".wool";
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}
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public String getSharedPathFor(Chunk chunk) {
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return configuration.getSharedDownloadsDirectory().getAbsolutePath() + File.separator + chunk.getId() + ".wool";
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}
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public boolean isSharedEnabled() {
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return configuration.getSharedDownloadsDirectory() != null && configuration.getSharedDownloadsDirectory().exists();
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}
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public boolean copyChunkFromSharedToCache(Chunk chunk) {
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return copyFileFromSharedToCache(getSharedPathFor(chunk), getCachePathFor(chunk));
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}
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private boolean copyFileFromSharedToCache(String source, String target) {
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Path existingArchivePath = Paths.get(source);
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Path targetArchivePath = Paths.get(target);
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if (existingArchivePath.equals(targetArchivePath)) {
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// target are the same, do nothing
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return true;
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}
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try {
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Files.deleteIfExists(targetArchivePath); // createLink only works if the target does not exist
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try {
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Files.createLink(targetArchivePath, existingArchivePath);
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Log.getInstance(configuration).debug("Created hardlink from " + targetArchivePath + " to " + existingArchivePath);
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}
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catch (UnsupportedOperationException // underlying file system does not support hard-linking
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| FileSystemException // cache-dir and shared-zip are on separate file systems, even though hard-linking is supported
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| SecurityException // user is not allowed to create hard-links
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ignore) {
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// Creating hardlinks might not be supported on some filesystems
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Log.getInstance(configuration).debug("Failed to create hardlink, falling back to copying file to " + targetArchivePath);
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Files.copy(existingArchivePath, targetArchivePath, StandardCopyOption.REPLACE_EXISTING);
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}
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}
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catch (IOException e) {
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Log.getInstance(configuration).error("Error while copying " + source + " from shared downloads directory to working dir");
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return false;
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}
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return true;
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}
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/**
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* Creates cache directory
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*/
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public void createCacheDir() {
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this.removeWorkingDirectory();
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this.configuration.getWorkingDirectory().mkdirs();
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this.configuration.getWoolCacheDirectory().mkdirs();
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if (this.configuration.getSharedDownloadsDirectory() != null) {
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this.configuration.getSharedDownloadsDirectory().mkdirs();
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if (this.configuration.getSharedDownloadsDirectory().exists() == false) {
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System.err.println("DirectoryManager::createCacheDir Unable to create common directory " + this.configuration.getSharedDownloadsDirectory().getAbsolutePath());
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}
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}
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}
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/**
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* Cleans working directory and also deletes it if the user hasn't specified a cache directory
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*/
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public void removeWorkingDirectory() {
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if (this.configuration.isUserHasSpecifiedACacheDir()) {
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this.cleanWorkingDirectory();
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}
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else {
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Utils.delete(this.configuration.getWorkingDirectory());
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}
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}
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/**
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* Deletes the working and storage directories
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*/
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public void cleanWorkingDirectory() {
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this.cleanDirectory(this.configuration.getWorkingDirectory());
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this.cleanDirectory(this.configuration.getWoolCacheDirectory());
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}
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/**
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* Cleans a directory and removes files in it from the md5 cache
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* @param dir representing the directory to be cleaned
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* @return false if the dir null, true otherwise
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*/
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private boolean cleanDirectory(File dir) {
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if (dir == null) {
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return false;
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}
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File[] files = dir.listFiles();
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if (files != null) {
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for (File file : files) {
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if (file.isDirectory()) {
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Utils.delete(file);
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}
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else {
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try {
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String extension = file.getName().substring(file.getName().lastIndexOf('.')).toLowerCase();
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String name = file.getName().substring(0, file.getName().length() - 1 * extension.length());
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if (".wool".equals(extension)) {
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// check if the md5 of the file is ok
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String md5_local = Utils.md5(file.getAbsolutePath());
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if (md5_local.equals(name) == false) {
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file.delete();
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}
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// TODO: remove old one
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}
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else {
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file.delete();
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}
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}
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catch (StringIndexOutOfBoundsException e) { // because the file does not have an . in his path
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file.delete();
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}
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}
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}
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}
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return true;
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}
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/**
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* @return a list of archives (files with extensions .zip or .wool) in the
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* working, storage, and shared downloads directories as long as they are not null
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*/
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public List<File> getLocalCacheFiles() {
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List<File> files_local = new LinkedList<File>();
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List<File> files = new LinkedList<File>();
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if (this.configuration.getWorkingDirectory() != null) {
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File[] filesInDirectory = this.configuration.getWorkingDirectory().listFiles();
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if (filesInDirectory != null) {
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files.addAll(Arrays.asList(filesInDirectory));
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}
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}
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if (this.configuration.getWoolCacheDirectory() != null) {
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File[] filesInDirectory = this.configuration.getWoolCacheDirectory().listFiles();
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if (filesInDirectory != null) {
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files.addAll(Arrays.asList(filesInDirectory));
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}
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}
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if (this.configuration.getSharedDownloadsDirectory() != null) {
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File[] filesInDirectory = this.configuration.getSharedDownloadsDirectory().listFiles();
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if (filesInDirectory != null) {
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files.addAll(Arrays.asList(filesInDirectory));
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}
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}
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for (File file : files) {
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if (file.isFile()) {
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try {
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String extension = file.getName().substring(file.getName().lastIndexOf('.')).toLowerCase();
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String name = file.getName().substring(0, file.getName().length() - 1 * extension.length());
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if (".wool".equals(extension)) {
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// check if the md5 of the file is ok
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String md5_local = Utils.md5(file.getAbsolutePath());
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if (md5_local.equals(name)) {
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files_local.add(file);
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}
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}
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}
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catch (StringIndexOutOfBoundsException e) { // because the file does not have an . his path
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}
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}
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}
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return files_local;
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}
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/**
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* Runs through all SheepIt related directories and checks if files and folders are all readable, writeable
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* and in case of directories, checks if the contents can be listed and if usable space is enough.
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* Only logs instances where something was detected, otherwise is it will only print "FilesystemHealthCheck started"
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* @return an ArrayList of Strings containing all logs of the FSHealth check
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*/
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public List<String> filesystemHealthCheck() {
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List<String> logs = new ArrayList<>();
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String f = "FSHealth: ";
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logs.add(f + "FilesystemHealthCheck started");
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List<File> dirsToCheck = new ArrayList<>();
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List<File> dirsChecked = new ArrayList<>();
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dirsToCheck.add(configuration.getWorkingDirectory().getAbsoluteFile());
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if (configuration.getSharedDownloadsDirectory() != null && dirsToCheck.contains(configuration.getSharedDownloadsDirectory().getAbsoluteFile()) == false) {
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dirsToCheck.add(configuration.getSharedDownloadsDirectory().getAbsoluteFile());
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}
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if (configuration.getWoolCacheDirectory() != null && dirsToCheck.contains(configuration.getWoolCacheDirectory().getAbsoluteFile()) == false) {
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dirsToCheck.add(configuration.getWoolCacheDirectory().getAbsoluteFile());
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}
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ListIterator<File> dirs = dirsToCheck.listIterator();
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while (dirs.hasNext()) {
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File dir = dirs.next();
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dirs.remove();
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dirsChecked.add(dir);
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File[] fileList = dir.listFiles();
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if (fileList == null) {
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logs.add(f + "File list of " + dir + " is null");
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}
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else {
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for (File file : fileList) {
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file = file.getAbsoluteFile();
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//logs.add(f + file);
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boolean canRead = file.canRead();
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boolean canWrite = file.canWrite();
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boolean isDir = file.isDirectory();
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if (canRead == false) {
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logs.add(f + "Can't read from " + file);
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}
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if (canWrite == false) {
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logs.add(f + "Can't write to " + file);
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}
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if (canRead && canWrite && isDir) {
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if (dirsChecked.contains(file)) {
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logs.add(f + "Dir " + file + " already checked. Loop detected");
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}
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else {
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dirs.add(file);
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}
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long usableSpace = file.getUsableSpace();
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if (usableSpace < 512 * 1024) {
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logs.add(f + "Usable space is " + usableSpace + " for " + file);
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}
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}
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}
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}
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}
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return logs;
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}
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}
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