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package org.onap.portalapp.widget.utils;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.onap.portalapp.widget.constant.WidgetConstant;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UnzipUtil {
/**
* Size of the buffer to read/write data
*/
private static final int BUFFER_SIZE = 4096;
private static final Logger logger = LoggerFactory.getLogger(UnzipUtil.class);
/**
* Extracts a zip file specified by the zipFilePath to a directory specified by
* destDirectory (will be created if does not exists)
*
* @param zipFilePath
* path
* @param destDirectory
* directory
* @param widgetName
* name
* @return Map of contents
* @throws IOException
* On error
*/
public Map<String, byte[]> unzip_db(String zipFilePath, String destDirectory, String widgetName)
throws IOException {
logger.debug("UnzipUtil.unzip_db: unzip widget file {}", widgetName);
File destDir = new File(destDirectory);
if (!destDir.exists())
destDir.mkdir();
try(ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath)))
{
ZipEntry entry = zipIn.getNextEntry();
Map<String, byte[]> map = new HashMap<>();
String[] requiredKeys = { WidgetConstant.WIDGET_CONTROLLER_LOCATION, WidgetConstant.WIDGET_MARKUP_LOCATION,
WidgetConstant.WIDGET_STYLE_LOCATION };
for (String k : requiredKeys)
map.put(k, null);
// iterates over entries in the zip file
Stack<File> stack = new Stack<>();
while (entry != null) {
String filePath = destDirectory + File.separator + widgetName + File.separator
+ entry.getName().substring(entry.getName().indexOf("/") + 1);
final String entryShortName = entry.getName().substring(entry.getName().indexOf("/") + 1);
logger.debug("UnzipUtil.unzip_db: file path {}, short name {}", filePath, entryShortName);
if (!entry.isDirectory()) {
// if the entry is a file, extracts it
logger.debug("UnzipUtil.unzip_db: unzip and save widget file {}", filePath);
stack.push(new File(filePath));
extractFile(zipIn, filePath);
} else {
// if the entry is a directory, make the directory
logger.debug("UnzipUtil.unzip_db: unzip and create widget folder {}", filePath);
File dir = new File(filePath);
stack.push(new File(filePath));
dir.mkdir();
}
// Is this one we need?
if (map.containsKey(entryShortName))
map.put(entryShortName, Files.readAllBytes(Paths.get(filePath)));
zipIn.closeEntry();
entry = zipIn.getNextEntry();
}
while (!stack.isEmpty())
stack.pop().delete();
for (String k : requiredKeys)
if (!map.containsKey(k))
logger.warn("UnzipUtil.unzip_db: no zip archive entry found for required key {}", k);
return map;
}
}
/**
* Extracts a zip entry (file entry)
*
* @param zipIn
* @param filePath
* @throws IOException
*/
private void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
try(BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath))){
byte[] bytesIn = new byte[BUFFER_SIZE];
int read = 0;
while ((read = zipIn.read(bytesIn)) != -1) {
bos.write(bytesIn, 0, read);
}
}
}
}
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