org.apache.kylin.common.util.ZipFileUtils Maven / Gradle / Ivy
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* distributed with this work for additional information
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* to you under the Apache 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://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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*/
package org.apache.kylin.common.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Locale;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.kylin.common.exception.CommonErrorCode;
import org.apache.kylin.common.exception.KylinException;
import lombok.val;
public class ZipFileUtils {
public static void decompressZipFile(String zipFilename, String targetDir) throws IOException {
if (!validateZipFilename(zipFilename)) {
throw new KylinException(CommonErrorCode.INVALID_ZIP_NAME, "Zipfile must end with .zip");
}
String normalizedTargetDir = Paths.get(targetDir).normalize().toString();
try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zipFilename))) {
ZipEntry entry;
while ((entry = zipInputStream.getNextEntry()) != null) {
val entryDir = Paths.get(targetDir, entry.getName()).normalize().toString();
if (!entryDir.startsWith(normalizedTargetDir)) {
throw new KylinException(CommonErrorCode.INVALID_ZIP_ENTRY,
"Zip Entry <" + entry.getName() + "> is Invalid");
}
if (entry.isDirectory()) {
Files.createDirectories(Paths.get(entryDir));
} else {
Files.createDirectories(Paths.get(entryDir).getParent());
Files.copy(zipInputStream, Paths.get(targetDir, entry.getName()));
}
}
}
}
public static void compressZipFile(String sourceDir, OutputStream outputStream) throws IOException {
ZipOutputStream zipFile = null;
try {
zipFile = new ZipOutputStream(outputStream);
compressDirectoryToZipfile(normDir(new File(sourceDir).getParent()), normDir(sourceDir), zipFile);
} finally {
IOUtils.closeQuietly(zipFile);
}
}
public static void compressZipFile(String sourceDir, String zipFilename) throws IOException {
if (!validateZipFilename(zipFilename)) {
throw new RuntimeException("Zipfile must end with .zip");
}
compressZipFile(sourceDir, new FileOutputStream(zipFilename));
}
private static void compressDirectoryToZipfile(String rootDir, String sourceDir, ZipOutputStream out)
throws IOException {
File[] files = new File(sourceDir).listFiles();
if (files == null)
return;
// should put empty directory to zip file
if (files.length == 0) {
out.putNextEntry(
new ZipEntry(normDir(StringUtils.isEmpty(rootDir) ? sourceDir : sourceDir.replace(rootDir, ""))));
}
for (File sourceFile : files) {
if (sourceFile.isDirectory()) {
compressDirectoryToZipfile(rootDir, sourceDir + normDir(sourceFile.getName()), out);
} else {
ZipEntry entry = new ZipEntry(
normDir(StringUtils.isEmpty(rootDir) ? sourceDir : sourceDir.replace(rootDir, ""))
+ sourceFile.getName());
entry.setTime(sourceFile.lastModified());
out.putNextEntry(entry);
FileInputStream in = new FileInputStream(sourceDir + sourceFile.getName());
try {
IOUtils.copy(in, out);
} finally {
IOUtils.closeQuietly(in);
}
}
}
}
public static boolean validateZipFilename(String filename) {
return !StringUtils.isEmpty(filename) && filename.trim().toLowerCase(Locale.ROOT).endsWith(".zip");
}
private static String normDir(String dirName) {
if (!StringUtils.isEmpty(dirName) && !dirName.endsWith(File.separator)) {
dirName = dirName + File.separator;
}
return dirName;
}
}