mirror of https://github.com/TeamNewPipe/NewPipe
116 lines
4.3 KiB
Java
116 lines
4.3 KiB
Java
package org.schabi.newpipe.util;
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import org.schabi.newpipe.streams.io.SharpInputStream;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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import java.util.zip.ZipOutputStream;
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import org.schabi.newpipe.streams.io.StoredFileHelper;
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/**
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* Created by Christian Schabesberger on 28.01.18.
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* Copyright 2018 Christian Schabesberger <chris.schabesberger@mailbox.org>
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* ZipHelper.java is part of NewPipe
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* <p>
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* License: GPL-3.0+
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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 General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* <p>
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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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* <p>
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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, see <http://www.gnu.org/licenses/>.
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*/
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public final class ZipHelper {
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private ZipHelper() { }
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private static final int BUFFER_SIZE = 2048;
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/**
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* This function helps to create zip files.
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* Caution this will override the original file.
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*
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* @param outZip The ZipOutputStream where the data should be stored in
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* @param file The path of the file that should be added to zip.
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* @param name The path of the file inside the zip.
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* @throws Exception
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*/
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public static void addFileToZip(final ZipOutputStream outZip, final String file,
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final String name) throws Exception {
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final byte[] data = new byte[BUFFER_SIZE];
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try (FileInputStream fi = new FileInputStream(file);
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BufferedInputStream inputStream = new BufferedInputStream(fi, BUFFER_SIZE)) {
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final ZipEntry entry = new ZipEntry(name);
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outZip.putNextEntry(entry);
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int count;
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while ((count = inputStream.read(data, 0, BUFFER_SIZE)) != -1) {
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outZip.write(data, 0, count);
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}
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}
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}
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/**
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* This will extract data from ZipInputStream.
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* Caution this will override the original file.
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*
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* @param zipFile The zip file
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* @param file The path of the file on the disk where the data should be extracted to.
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* @param name The path of the file inside the zip.
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* @return will return true if the file was found within the zip file
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* @throws Exception
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*/
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public static boolean extractFileFromZip(final StoredFileHelper zipFile, final String file,
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final String name) throws Exception {
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try (ZipInputStream inZip = new ZipInputStream(new BufferedInputStream(
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new SharpInputStream(zipFile.getStream())))) {
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final byte[] data = new byte[BUFFER_SIZE];
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boolean found = false;
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ZipEntry ze;
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while ((ze = inZip.getNextEntry()) != null) {
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if (ze.getName().equals(name)) {
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found = true;
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// delete old file first
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final File oldFile = new File(file);
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if (oldFile.exists()) {
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if (!oldFile.delete()) {
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throw new Exception("Could not delete " + file);
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}
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}
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try (FileOutputStream outFile = new FileOutputStream(file)) {
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int count = 0;
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while ((count = inZip.read(data)) != -1) {
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outFile.write(data, 0, count);
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}
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}
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inZip.closeEntry();
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}
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}
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return found;
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}
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}
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public static boolean isValidZipFile(final StoredFileHelper file) {
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try (ZipInputStream ignored = new ZipInputStream(new BufferedInputStream(
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new SharpInputStream(file.getStream())))) {
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return true;
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} catch (final IOException ioe) {
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return false;
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}
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}
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}
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