mirror of https://github.com/TeamNewPipe/NewPipe
200 lines
7.7 KiB
Java
200 lines
7.7 KiB
Java
package org.schabi.newpipe.util;
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import org.schabi.newpipe.streams.io.SharpInputStream;
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import org.schabi.newpipe.streams.io.StoredFileHelper;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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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.io.InputStream;
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import java.io.OutputStream;
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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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/**
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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 static final int BUFFER_SIZE = 2048;
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@FunctionalInterface
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public interface InputStreamConsumer {
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void acceptStream(InputStream inputStream) throws IOException;
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}
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@FunctionalInterface
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public interface OutputStreamConsumer {
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void acceptStream(OutputStream outputStream) throws IOException;
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}
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private ZipHelper() { }
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/**
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* This function helps to create zip files. Caution this will overwrite 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 nameInZip the path of the file inside the zip
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* @param fileOnDisk the path of the file on the disk that should be added to zip
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*/
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public static void addFileToZip(final ZipOutputStream outZip,
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final String nameInZip,
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final String fileOnDisk) throws IOException {
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try (FileInputStream fi = new FileInputStream(fileOnDisk)) {
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addFileToZip(outZip, nameInZip, fi);
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}
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}
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/**
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* This function helps to create zip files. Caution this will overwrite 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 nameInZip the path of the file inside the zip
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* @param streamConsumer will be called with an output stream that will go to the output file
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*/
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public static void addFileToZip(final ZipOutputStream outZip,
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final String nameInZip,
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final OutputStreamConsumer streamConsumer) throws IOException {
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final byte[] bytes;
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try (ByteArrayOutputStream byteOutput = new ByteArrayOutputStream()) {
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streamConsumer.acceptStream(byteOutput);
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bytes = byteOutput.toByteArray();
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}
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try (ByteArrayInputStream byteInput = new ByteArrayInputStream(bytes)) {
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ZipHelper.addFileToZip(outZip, nameInZip, byteInput);
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}
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}
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/**
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* This function helps to create zip files. Caution this will overwrite 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 nameInZip the path of the file inside the zip
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* @param inputStream the content to put inside the file
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*/
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public static void addFileToZip(final ZipOutputStream outZip,
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final String nameInZip,
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final InputStream inputStream) throws IOException {
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final byte[] data = new byte[BUFFER_SIZE];
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try (BufferedInputStream bufferedInputStream =
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new BufferedInputStream(inputStream, BUFFER_SIZE)) {
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final ZipEntry entry = new ZipEntry(nameInZip);
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outZip.putNextEntry(entry);
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int count;
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while ((count = bufferedInputStream.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. Caution this will overwrite the original file.
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*
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* @param zipFile the zip file to extract from
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* @param nameInZip the path of the file inside the zip
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* @param fileOnDisk the path of the file on the disk where the data should be extracted to
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* @return will return true if the file was found within the zip file
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*/
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public static boolean extractFileFromZip(final StoredFileHelper zipFile,
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final String nameInZip,
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final String fileOnDisk) throws IOException {
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return extractFileFromZip(zipFile, nameInZip, input -> {
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// delete old file first
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final File oldFile = new File(fileOnDisk);
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if (oldFile.exists()) {
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if (!oldFile.delete()) {
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throw new IOException("Could not delete " + fileOnDisk);
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}
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}
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final byte[] data = new byte[BUFFER_SIZE];
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try (FileOutputStream outFile = new FileOutputStream(fileOnDisk)) {
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int count;
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while ((count = input.read(data)) != -1) {
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outFile.write(data, 0, count);
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}
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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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*
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* @param zipFile the zip file to extract from
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* @param nameInZip the path of the file inside the zip
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* @param streamConsumer will be called with the input stream from 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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*/
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public static boolean extractFileFromZip(final StoredFileHelper zipFile,
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final String nameInZip,
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final InputStreamConsumer streamConsumer)
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throws IOException {
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try (ZipInputStream inZip = new ZipInputStream(new BufferedInputStream(
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new SharpInputStream(zipFile.getStream())))) {
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ZipEntry ze;
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while ((ze = inZip.getNextEntry()) != null) {
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if (ze.getName().equals(nameInZip)) {
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streamConsumer.acceptStream(inZip);
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return true;
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}
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}
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return false;
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}
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}
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/**
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* @param zipFile the zip file
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* @param fileInZip the filename to check
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* @return whether the provided filename is in the zip; only the first level is checked
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*/
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public static boolean zipContainsFile(final StoredFileHelper zipFile, final String fileInZip)
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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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ZipEntry ze;
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while ((ze = inZip.getNextEntry()) != null) {
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if (ze.getName().equals(fileInZip)) {
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return true;
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}
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}
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return false;
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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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