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/*
* Licensed to The Apereo Foundation under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
*
* The Apereo Foundation licenses this file to you under the Educational
* Community License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License
* at:
*
* http://opensource.org/licenses/ecl2.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*
*/
package org.opencastproject.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Vector;
import java.util.zip.Deflater;
import de.schlichtherle.io.ArchiveDetector;
import de.schlichtherle.io.ArchiveException;
import de.schlichtherle.io.ArchiveWarningException;
import de.schlichtherle.io.DefaultArchiveDetector;
import de.schlichtherle.io.File;
import de.schlichtherle.io.archive.zip.ZipDriver;
/*
* WARNING:
* Some archivers, such as file-roller in Ubuntu, seem not to be able to uncompress zip archives containg files with special characters.
* The pure zip standard uses the CP437 encoding which CAN'T represent special characters, but applications have implemented their own methods
* to overcome this inconvenience. TrueZip also. However, it seems file-roller (and probably others) doesn't "understand" how to restore the
* original filenames and shows strange (and un-readable) characters in the unzipped filenames
* However, the inverse process (unzipping zip archives made with file-roller and containing files with special characters) seems to work fine
*
* N.B. By "special characters" I mean those not present in the original ASCII specification, such as accents, special letters, etc
*
* ruben.perez
*/
/**
* Provides static methods for compressing and extracting zip files using zip64 extensions when necessary.
*/
public final class ZipUtil {
private static final Logger logger = LoggerFactory.getLogger(ZipUtil.class);
public static final int BEST_SPEED = Deflater.BEST_SPEED;
public static final int BEST_COMPRESSION = Deflater.BEST_COMPRESSION;
public static final int DEFAULT_COMPRESSION = Deflater.DEFAULT_COMPRESSION;
public static final int NO_COMPRESSION = Deflater.NO_COMPRESSION;
/** Disable construction of this utility class */
private ZipUtil() {
}
/**
* Utility class to ease the process of umounting a zip file
*
* @param zipFile
* The file to umount
* @throws IOException
* If some problem occurs on unmounting
*/
private static void umount(File zipFile) throws IOException {
try {
File.umount(zipFile);
} catch (ArchiveWarningException awe) {
logger.warn("Umounting {} threw the following warning: {}", zipFile.getCanonicalPath(), awe.getMessage());
} catch (ArchiveException ae) {
logger.error("Unable to umount zip file: {}", zipFile.getCanonicalPath());
throw new IOException("Unable to umount zip file: " + zipFile.getCanonicalPath(), ae);
}
}
/***********************************************************************************/
/* SERVICE CLASSES - The two following classes are the ones actually doing the job */
/***********************************************************************************/
/**
* Compresses source files into a zip archive
*
* @param sourceFiles
* A {@link java.io.File} array with the files to include in the root of the archive
* @param destination
* A {@link java.io.File} descriptor to the location where the zip file should be created
* @param recursive
* Indicate whether or not recursively zipping nested directories
* @param level
* The zip algorithm compression level. Ranges between 0 (no compression) and 9 (max. compression)
* @return A {@link java.io.File} descriptor of the zip archive file
* @throws IOException
* If the zip file can not be created, or the input files names can not be correctly parsed
*/
public static java.io.File zip(java.io.File[] sourceFiles, java.io.File destination, boolean recursive, int level)
throws IOException {
if (sourceFiles == null) {
logger.error("The array with files to zip cannot be null");
throw new IllegalArgumentException("The array with files to zip cannot be null");
}
if (sourceFiles.length <= 0) {
logger.error("The array with files to zip cannot be empty");
throw new IllegalArgumentException("The array with files to zip cannot be empty");
}
if (destination == null) {
logger.error("The destination file cannot be null");
throw new IllegalArgumentException("The destination file cannot be null");
}
if (destination.exists()) {
logger.error("The destination file {} already exists", destination.getCanonicalPath());
throw new IllegalArgumentException("The destination file already exists");
}
if (level < -1) {
logger.warn("Compression level cannot be less than 0 (or -1 for default)");
logger.warn("Reverting to default...");
level = -1;
} else if (level > 9) {
logger.warn("Compression level cannot be greater than 9");
logger.warn("Reverting to default...");
level = -1;
}
// Limits the compression support to ZIP only and sets the compression level
ZipDriver zd = new ZipDriver(level);
ArchiveDetector ad = new DefaultArchiveDetector(ArchiveDetector.NULL, "zip", zd);
File zipFile;
try {
zipFile = new File(destination.getCanonicalFile(), ad);
} catch (IOException ioe) {
logger.error("Unable to create the zip file: {}", destination.getAbsolutePath());
throw new IOException("Unable to create the zip file: {}" + destination.getAbsolutePath(), ioe);
}
try {
if (!zipFile.isArchive()) {
logger.error("The destination file does not represent a valid zip archive (.zip extension is required)");
zipFile.deleteAll();
throw new IllegalArgumentException(
"The destination file does not represent a valid zip archive (.zip extension is required)");
}
if (!zipFile.mkdirs())
throw new IOException("Couldn't create the destination file");
for (java.io.File f : sourceFiles) {
if (f == null) {
logger.error("Null inputfile in array");
zipFile.deleteAll();
throw new IllegalArgumentException("Null inputfile in array");
}
logger.debug("Attempting to zip file {}...", f.getAbsolutePath());
// TrueZip manual says that (archiveC|copy)All(From|To) methods work with either directories or regular files
// Therefore, one could do zipFile.archiveCopyAllFrom(f), where f is a regular file, and it would work. Well, it
// DOESN'T
// This is why we have to tell if a file is a regular file or a directory BEFORE copying it with the appropriate
// method
boolean success = false;
if (f.exists()) {
if (!f.isDirectory() || recursive) {
success = new File(zipFile, f.getName()).copyAllFrom(f);
if (success)
logger.debug("File {} zipped successfuly", f.getAbsolutePath());
else {
logger.error("File {} not zipped", f.getAbsolutePath());
zipFile.deleteAll();
throw new IOException("Failed to zip one of the input files: " + f.getAbsolutePath());
}
}
} else {
logger.error("Input file {} doesn't exist", f.getAbsolutePath());
zipFile.deleteAll();
throw new FileNotFoundException("One of the input files does not exist: " + f.getAbsolutePath());
}
}
} catch (IOException e) {
throw e;
} finally {
umount(zipFile);
}
return destination;
}
/**
* Extracts a zip file to a directory.
*
* @param zipFile
* A {@link String} with the path to the source zip archive
* @param destination
* A {@link String} with the location where the zip archive will be extracted. If this destination directory
* does not exist, it will be created.
* @throws IOException
* if the zip file cannot be read, the destination directory cannot be created or the extraction is not
* successful
*/
public static void unzip(java.io.File zipFile, java.io.File destination) throws IOException {
boolean success;
if (zipFile == null) {
logger.error("The zip file cannot be null");
throw new IllegalArgumentException("The zip file must be set");
}
if (!zipFile.exists()) {
logger.error("The zip file does not exist: {}", zipFile.getCanonicalPath());
throw new FileNotFoundException("The zip file does not exist: " + zipFile.getCanonicalPath());
}
if (destination == null) {
logger.error("The destination file cannot be null");
throw new IllegalArgumentException("Destination file cannot be null");
}
// FIXME Commented out for 3rd party compatibility. See comment in the zip method above -ruben.perez
// File f = new File(zipFile.getCanonicalFile(), new DefaultArchiveDetector(ArchiveDetector.NULL, "zip", new
// ZipDriver("utf-8")));
File f;
try {
f = new File(zipFile.getCanonicalFile());
} catch (IOException ioe) {
logger.error("Unable to create the zip file: {}", destination.getAbsolutePath());
throw new IOException("Unable to create the zip file: {}" + destination.getAbsolutePath(), ioe);
}
try {
if (f.isArchive() && f.isDirectory()) {
if (destination.exists()) {
if (!destination.isDirectory()) {
logger.error("Destination file must be a directory");
throw new IllegalArgumentException("Destination file must be a directory");
}
}
try {
destination.mkdirs();
} catch (SecurityException e) {
logger.error("Cannot create destination directory: {}", e.getMessage());
throw new IOException("Cannot create destination directory", e);
}
success = f.copyAllTo(destination);
if (success)
logger.debug("File {} unzipped successfully", zipFile.getCanonicalPath());
else {
logger.warn("File {} was not correctly unzipped", zipFile.getCanonicalPath());
throw new IOException("File " + zipFile.getCanonicalPath() + " was not correctly unzipped");
}
} else {
logger.error("The input file is not a valid zip file");
throw new IllegalArgumentException("The input file is not a valid zip file");
}
} catch (IOException e) {
throw (e);
} finally {
umount(f);
}
}
/************************************************************************************* */
/* "ALIASES" - For different types of input, but actually calling the previous methods */
/***************************************************************************************/
/**
* Compresses source files into a zip archive
*
* @param sourceFiles
* A {@link String} array with the file names to be included in the root of the archive
* @param destination
* A {@link String} with the path name of the resulting zip file
* @param recursive
* Indicate whether or not recursively zipping nested directories
* @param level
* The zip algorithm compression level. Ranges between 0 (no compression) and 9 (max. compression)
* @return A {@link java.io.File} descriptor of the zip archive file
* @throws IOException
* If the zip file can not be created, or the input files names can not be correctly parsed
*/
public static java.io.File zip(String[] sourceFiles, String destination, boolean recursive, int level)
throws IOException {
if (sourceFiles == null) {
logger.error("The input String array cannot be null");
throw new IllegalArgumentException("The input String array cannot be null");
}
if (destination == null) {
logger.error("Destination file cannot be null");
throw new IllegalArgumentException("Destination file cannot be null");
}
if ("".equals(destination)) {
logger.error("Destination file name must be set");
throw new IllegalArgumentException("Destination file name must be set");
}
Vector files = new Vector();
for (String name : sourceFiles) {
if (name == null) {
logger.error("One of the input file names is null");
throw new IllegalArgumentException("One of the input file names is null");
} else if ("".equals(name)) {
logger.error("One of the input file names is blank");
throw new IllegalArgumentException("One of the input file names is blank");
}
files.add(new java.io.File(name));
}
return zip(files.toArray(new java.io.File[files.size()]), new java.io.File(destination), recursive, level);
}
/**
* Compresses source files into a zip archive
*
* @param sourceFiles
* A {@link String} array with the file names to be included in the root of the archive
* @param destination
* A {@link java.io.File} with the path name of the resulting zip file
* @param recursive
* Indicate whether or not recursively zipping nested directories
* @param level
* The zip algorithm compression level. Ranges between 0 (no compression) and 9 (max. compression)
* @return A {@link java.io.File} descriptor of the zip archive file
* @throws IOException
* If the zip file can not be created, or the input files names can not be correctly parsed
*/
public static java.io.File zip(String[] sourceFiles, java.io.File destination, boolean recursive, int level)
throws IOException {
if (sourceFiles == null) {
logger.error("The input String array cannot be null");
throw new IllegalArgumentException("The input String array cannot be null");
}
Vector files = new Vector();
for (String name : sourceFiles) {
if (name == null) {
logger.error("One of the input file names is null");
throw new IllegalArgumentException("One of the input file names is null");
} else if ("".equals(name)) {
logger.error("One of the input file names is blank");
throw new IllegalArgumentException("One of the input file names is blank");
}
files.add(new java.io.File(name));
}
return zip(files.toArray(new java.io.File[files.size()]), destination, recursive, level);
}
/**
* Compresses source files into a zip archive
*
* @param sourceFiles
* A {@link java.io.File} array with the file names to be included in the root of the archive
* @param destination
* A {@link String} with the path name of the resulting zip file
* @param recursive
* Indicate whether or not recursively zipping nested directories
* @param level
* The zip algorithm compression level. Ranges between 0 (no compression) and 9 (max. compression)
* @return A {@link java.io.File} descriptor of the zip archive file
* @throws IOException
* If the zip file can not be created, or the input files names can not be correctly parsed
*/
public static java.io.File zip(java.io.File[] sourceFiles, String destination, boolean recursive, int level)
throws IOException {
if (destination == null) {
logger.error("Destination file cannot be null");
throw new IllegalArgumentException("Destination file cannot be null");
}
if ("".equals(destination)) {
logger.error("Destination file name must be set");
throw new IllegalArgumentException("Destination file name must be set");
}
return zip(sourceFiles, new java.io.File(destination), recursive, level);
}
/**
* Compresses source files into a zip archive (no recursive)
*
* @param sourceFiles
* A {@link java.io.File} array with the file names to be included in the root of the archive
* @param destination
* A {@link java.io.File} with the path name of the resulting zip file
* @param level
* The zip algorithm compression level. Ranges between 0 (no compression) and 9 (max. compression)
* @return A {@link java.io.File} descriptor of the zip archive file
* @throws IOException
* If the zip file can not be created, or the input files names can not be correctly parsed
*/
public static java.io.File zip(java.io.File[] sourceFiles, java.io.File destination, int level) throws IOException {
return zip(sourceFiles, destination, false, level);
}
/**
* Extracts a zip file to a directory.
*
* @param zipFile
* A {@link String} with the path to the source zip archive
* @param destination
* A {@link String} with the location where the zip archive will be extracted. If this destination directory
* does not exist, it will be created.
* @throws IOException
* if the zip file cannot be read, the destination directory cannot be created or the extraction is not
* successful
*/
public static void unzip(String zipFile, String destination) throws IOException {
if (zipFile == null) {
logger.error("Input filename cannot be null");
throw new IllegalArgumentException("Input filename cannot be null");
}
if ("".equals(zipFile)) {
logger.error("Input filename cannot be empty");
throw new IllegalArgumentException("Input filename cannot be empty");
}
if (destination == null) {
logger.error("Output filename cannot be null");
throw new IllegalArgumentException("Output filename cannot be null");
}
if ("".equals(destination)) {
logger.error("Output filename cannot be empty");
throw new IllegalArgumentException("Output filename cannot be empty");
}
unzip(new java.io.File(zipFile), new java.io.File(destination));
}
/**
* Extracts a zip file to a directory.
*
* @param zipFile
* A {@link java.io.File} with the path to the source zip archive
* @param destination
* A {@link String} with the location where the zip archive will be extracted.
* @throws IOException
* if the zip file cannot be read, the destination directory cannot be created or the extraction is not
* successful
*/
public static void unzip(java.io.File zipFile, String destination) throws IOException {
if (destination == null) {
logger.error("Output filename cannot be null");
throw new IllegalArgumentException("Output filename cannot be null");
}
if ("".equals(destination)) {
logger.error("Output filename cannot be empty");
throw new IllegalArgumentException("Output filename cannot be empty");
}
unzip(zipFile, new java.io.File(destination));
}
/**
* Extracts a zip file to a directory.
*
* @param zipFile
* A {@link String} with the path to the source zip archive
* @param destination
* A {@link java.io.File} with the location where the zip archive will be extracted.
* @throws IOException
* if the zip file cannot be read, the destination directory cannot be created or the extraction is not
* successful
*/
public static void unzip(String zipFile, java.io.File destination) throws IOException {
if (zipFile == null) {
logger.error("Input filename cannot be null");
throw new IllegalArgumentException("Input filename cannot be null");
}
if ("".equals(zipFile)) {
logger.error("Input filename cannot be empty");
throw new IllegalArgumentException("Input filename cannot be empty");
}
unzip(new java.io.File(zipFile), destination);
}
}
