org.openecomp.sdc.common.util.ZipUtil.java Source code

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Here is the source code for org.openecomp.sdc.common.util.ZipUtil.java

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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed 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,
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.common.util;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import org.apache.commons.io.output.ByteArrayOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ZipUtil {

    private static Logger log = LoggerFactory.getLogger(ZipUtil.class.getName());

    private ZipUtil() {
    }

    public static Map<String, byte[]> readZip(byte[] zipAsBytes) {

        ZipInputStream zis = null;
        zis = new ZipInputStream(new ByteArrayInputStream(zipAsBytes));

        return readZip(zis);
    }

    public static Map<String, byte[]> readZip(ZipInputStream zis) {

        Map<String, byte[]> fileNameToByteArray = new HashMap<String, byte[]>();

        byte[] buffer = new byte[1024];
        try {
            // get the zipped file list entry
            ZipEntry ze = zis.getNextEntry();

            while (ze != null) {

                String fileName = ze.getName();

                if (false == ze.isDirectory()) {

                    ByteArrayOutputStream os = new ByteArrayOutputStream();
                    try {
                        int len;
                        while ((len = zis.read(buffer)) > 0) {
                            os.write(buffer, 0, len);
                        }

                        fileNameToByteArray.put(fileName, os.toByteArray());

                    } finally {
                        if (os != null) {
                            os.close();
                        }
                    }
                }
                ze = zis.getNextEntry();

            }

            zis.closeEntry();
            zis.close();

        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        } finally {
            if (zis != null) {
                try {
                    zis.closeEntry();
                    zis.close();
                } catch (IOException e) {
                    // TODO: add log
                }

            }
        }

        return fileNameToByteArray;

    }

    public static void main(String[] args) {

        String zipFileName = "/src/test/resources/config/config.zip";

        zipFileName = "C:\\Git_work\\D2-SDnC\\catalog-be\\src\\test\\resources\\config\\config.zip";

        Path path = Paths.get(zipFileName);

        try {
            byte[] zipAsBytes = Files.readAllBytes(path);
            // encode to base

            ZipUtil.readZip(zipAsBytes);

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public static byte[] zipBytes(byte[] input) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ZipOutputStream zos = new ZipOutputStream(baos);
        ZipEntry entry = new ZipEntry("zip");
        entry.setSize(input.length);
        zos.putNextEntry(entry);
        zos.write(input);
        zos.closeEntry();
        zos.close();
        return baos.toByteArray();
    }

    public static byte[] unzip(byte[] zipped) {
        ZipInputStream zipinputstream = null;
        ByteArrayOutputStream outputStream = null;
        try {
            byte[] buf = new byte[1024];

            zipinputstream = new ZipInputStream(new ByteArrayInputStream(zipped));
            ZipEntry zipentry = zipinputstream.getNextEntry();
            outputStream = new ByteArrayOutputStream();
            int n;
            while ((n = zipinputstream.read(buf, 0, 1024)) > -1) {
                outputStream.write(buf, 0, n);
            }

            return outputStream.toByteArray();
        } catch (Exception e) {
            throw new IllegalStateException("Can't unzip input stream", e);
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    log.debug("Failed to close output stream", e);
                }
            }
            if (zipinputstream != null) {
                try {
                    zipinputstream.closeEntry();
                    zipinputstream.close();
                } catch (IOException e) {
                    log.debug("Failed to close zip input stream", e);
                }
            }
        }
    }

}