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/* |
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neon-fm - File management extensions to Neon |
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Copyright (C) 2024 Ulrich Hilger |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Affero General Public License as |
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published by the Free Software Foundation, either version 3 of the |
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License, or (at your option) any later version. |
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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 Affero General Public License for more details. |
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You should have received a copy of the GNU Affero General Public License |
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along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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package de.uhilger.fm; |
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import java.io.File; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.util.Enumeration; |
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import java.util.zip.ZipEntry; |
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import java.util.zip.ZipFile; |
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/** |
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* Eine Klasse mit Methoden zum entpacken von Dateien |
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* |
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* @author Ulrich Hilger, 15. Januar 2024 |
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*/ |
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public class Inflator { |
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/* --------- ZIP entpacken ---------------- */ |
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public String extractZipfile(String fName, String relPath, String base) { |
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//logger.fine("fName: " + fName + ", relPath: " + relPath); |
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String result = null; |
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if (!relPath.startsWith(".")) { |
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try { |
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//File targetDir = new File(fileBase, relPath); |
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//File targetDir = getTargetDir(relPath); |
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File archive = new File(base, fName); |
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if (extract(archive)) { |
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result = "ok"; |
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} else { |
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result = "error while extracting"; |
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} |
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} catch (Exception ex) { |
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result = ex.getLocalizedMessage(); |
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//logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex); |
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} |
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} else { |
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result = "Falsche relative Pfadangabe."; |
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} |
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return result; |
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} |
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/** |
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* extract a given ZIP archive to the folder respective archive resides in |
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* |
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* @param archive the archive to extract |
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* @throws Exception |
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*/ |
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private boolean extract(File archive) throws Exception { |
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ZipFile zipfile = new ZipFile(archive); |
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Enumeration en = zipfile.entries(); |
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while (en.hasMoreElements()) { |
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ZipEntry zipentry = (ZipEntry) en.nextElement(); |
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unzip(zipfile, zipentry, archive.getParent()); |
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} |
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zipfile.close(); |
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return true; |
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} |
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/** |
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* unzip a given entry of a given zip file to a given location |
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* |
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* @param zipfile the zip file to read an entry from |
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* @param zipentry the zip entry to read |
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* @param destPath the path to the destination location for the extracted content |
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* @throws IOException |
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*/ |
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private void unzip(ZipFile zipfile, ZipEntry zipentry, String destPath) throws IOException { |
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byte buf[] = new byte[1024]; |
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InputStream is = zipfile.getInputStream(zipentry); |
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String outFileName = destPath + File.separator + zipentry.getName(); |
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File file = new File(outFileName); |
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if (!zipentry.isDirectory()) { |
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file.getParentFile().mkdirs(); |
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if (!file.exists()) { |
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file.createNewFile(); |
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} |
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FileOutputStream fos = new FileOutputStream(file); |
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int i = is.read(buf, 0, 1024); |
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while (i > -1) { |
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fos.write(buf, 0, i); |
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i = is.read(buf, 0, 1024); |
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} |
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fos.close(); |
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is.close(); |
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} else { |
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file.mkdirs(); |
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} |
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} |
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} |