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package fr.emse.gitlab.saref;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.commons.io.FileUtils;
public class UnzipFile {
public static void unzip(File fileZip, File destDir) throws IOException {
byte[] buffer = new byte[1024];
ZipInputStream zis = new ZipInputStream(new FileInputStream(fileZip));
ZipEntry zipEntry = zis.getNextEntry();
while (zipEntry != null) {
File newFile = newFile(destDir, zipEntry);
if(zipEntry.isDirectory()) {
FileUtils.forceMkdir(newFile);
} else {
FileOutputStream fos = new FileOutputStream(newFile);
int len;
while ((len = zis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
}
zipEntry = zis.getNextEntry();
}
zis.closeEntry();
zis.close();
}
public static File newFile(File destinationDir, ZipEntry zipEntry) throws IOException {
File destFile = new File(destinationDir, zipEntry.getName());
String destDirPath = destinationDir.getCanonicalPath();
String destFilePath = destFile.getCanonicalPath();
if (!destFilePath.startsWith(destDirPath + File.separator)) {
throw new IOException("Entry is outside of the target dir: " + zipEntry.getName());
}
return destFile;
}
}