| commit | author | age | ||
| e369b9 | 1 | /* |
| c45b52 | 2 | fm - File management class library |
| e369b9 | 3 | Copyright (C) 2024 Ulrich Hilger |
| U | 4 | |
| 5 | This program is free software: you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU Affero General Public License as | |
| 7 | published by the Free Software Foundation, either version 3 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU Affero General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Affero General Public License | |
| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 17 | */ | |
| 18 | package de.uhilger.fm; | |
| 19 | ||
| 20 | import java.io.File; | |
| 21 | import java.io.FileOutputStream; | |
| 22 | import java.io.IOException; | |
| 23 | import java.io.InputStream; | |
| 24 | import java.util.Enumeration; | |
| 25 | import java.util.zip.ZipEntry; | |
| 26 | import java.util.zip.ZipFile; | |
| 27 | ||
| 28 | /** | |
| 7e5166 | 29 | * Entpacken von Dateien |
| e369b9 | 30 | * |
| U | 31 | * @author Ulrich Hilger, 15. Januar 2024 |
| 32 | */ | |
| 33 | public class Inflator { | |
| 34 | ||
| 7e5166 | 35 | /** |
| U | 36 | * Eine Zip-Datei entpacken |
| 37 | * | |
| 38 | * @param fName Name der Zip-Datei | |
| 39 | * @param base absoluter Pfad des Ablageortes der Zip-Datei | |
| 40 | * @return 'ok', wenn erfolgreich oder Fehlermeldung, wenn nicht | |
| 41 | */ | |
| 42 | public String extractZipfile(String fName, /*String relPath, */String base) { | |
| e369b9 | 43 | //logger.fine("fName: " + fName + ", relPath: " + relPath); |
| U | 44 | String result = null; |
| 7e5166 | 45 | // if (!relPath.startsWith(".")) { |
| e369b9 | 46 | try { |
| U | 47 | //File targetDir = new File(fileBase, relPath); |
| 48 | //File targetDir = getTargetDir(relPath); | |
| 49 | File archive = new File(base, fName); | |
| 50 | if (extract(archive)) { | |
| 51 | result = "ok"; | |
| 52 | } else { | |
| 53 | result = "error while extracting"; | |
| 54 | } | |
| 55 | } catch (Exception ex) { | |
| 56 | result = ex.getLocalizedMessage(); | |
| 57 | //logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex); | |
| 58 | } | |
| 7e5166 | 59 | // } else { |
| U | 60 | // result = "Falsche relative Pfadangabe."; |
| 61 | // } | |
| e369b9 | 62 | return result; |
| U | 63 | } |
| 64 | ||
| 65 | /** | |
| 7e5166 | 66 | * Eine Datei in den Ordner entpacken, in dem sie liegt |
| e369b9 | 67 | * |
| 7e5166 | 68 | * @param archive die zu entpackende Zip-Datei |
| U | 69 | * @throws Exception wenn etwas schief geht |
| e369b9 | 70 | */ |
| U | 71 | private boolean extract(File archive) throws Exception { |
| 72 | ZipFile zipfile = new ZipFile(archive); | |
| 73 | Enumeration en = zipfile.entries(); | |
| 74 | while (en.hasMoreElements()) { | |
| 75 | ZipEntry zipentry = (ZipEntry) en.nextElement(); | |
| 76 | unzip(zipfile, zipentry, archive.getParent()); | |
| 77 | } | |
| 78 | zipfile.close(); | |
| 79 | return true; | |
| 80 | } | |
| 81 | ||
| 82 | /** | |
| 83 | * unzip a given entry of a given zip file to a given location | |
| 7e5166 | 84 | * Einen Eintrag in einer ZIP-Datei an einen gegebenen Ausgabeort extrahieren |
| e369b9 | 85 | * |
| 7e5166 | 86 | * @param zipfile die Zip-Datei, aus der ein zu entpackender Eintrag gelesen werden soll |
| U | 87 | * @param zipentry der Eintrag, der entpackt werden soll |
| 88 | * @param destPath der Pfad zum Ausgabeort | |
| 89 | * @throws IOException wenn etwas schief geht | |
| e369b9 | 90 | */ |
| U | 91 | private void unzip(ZipFile zipfile, ZipEntry zipentry, String destPath) throws IOException { |
| 92 | byte buf[] = new byte[1024]; | |
| 93 | InputStream is = zipfile.getInputStream(zipentry); | |
| 94 | String outFileName = destPath + File.separator + zipentry.getName(); | |
| 95 | File file = new File(outFileName); | |
| 96 | if (!zipentry.isDirectory()) { | |
| 97 | file.getParentFile().mkdirs(); | |
| 98 | if (!file.exists()) { | |
| 99 | file.createNewFile(); | |
| 100 | } | |
| 101 | FileOutputStream fos = new FileOutputStream(file); | |
| 102 | int i = is.read(buf, 0, 1024); | |
| 103 | while (i > -1) { | |
| 104 | fos.write(buf, 0, i); | |
| 105 | i = is.read(buf, 0, 1024); | |
| 106 | } | |
| 107 | fos.close(); | |
| 108 | is.close(); | |
| 109 | } else { | |
| 110 | file.mkdirs(); | |
| 111 | } | |
| 112 | } | |
| 113 | ||
| 114 | } | |
