io.vertx.config.vault.utils.VaultDownloader.java Source code

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Here is the source code for io.vertx.config.vault.utils.VaultDownloader.java

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/*
 * Copyright (c) 2014 Red Hat, Inc. and others
 *
 * Red Hat licenses this file 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, 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 io.vertx.config.vault.utils;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.ArchUtils;
import org.apache.commons.lang3.SystemUtils;

import java.io.*;
import java.net.URL;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/**
 * @author <a href="http://escoffier.me">Clement Escoffier</a>
 */
public class VaultDownloader {

    public static File download() {
        File out = new File("target/vault/vault");

        if (SystemUtils.IS_OS_WINDOWS) {
            out = new File("target/vault/vault.exe");
        }

        if (out.isFile()) {
            return out;
        }

        File zip = new File("target/vault.zip");

        try {
            FileUtils.copyURLToFile(getURL(VaultProcess.VAULT_VERSION), zip);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        assert zip.isFile();

        System.out.println(zip.getAbsolutePath() + " has been downloaded, unzipping");
        try {
            unzip(zip, out.getParentFile());
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        System.out.println("Vault: " + out.getAbsolutePath());
        assert out.isFile();
        out.setExecutable(true);
        assert out.canExecute();
        return out;
    }

    private static URL getURL(String version) {
        StringBuilder url = new StringBuilder();
        url.append("https://releases.hashicorp.com/vault/").append(version).append("/vault_").append(version)
                .append("_");

        if (SystemUtils.IS_OS_MAC) {
            url.append("darwin_");
        } else if (SystemUtils.IS_OS_LINUX) {
            url.append("linux_");
        } else if (SystemUtils.IS_OS_WINDOWS) {
            url.append("windows_");
        } else {
            throw new IllegalStateException("Unsupported operating system");
        }

        if (ArchUtils.getProcessor().is64Bit()) {
            url.append("amd64.zip");
        } else {
            url.append("386.zip");
        }

        System.out.println("Downloading " + url.toString());
        try {
            return new URL(url.toString());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

    private static void unzip(File zipFilePath, File destDir) throws IOException {
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
        ZipEntry entry = zipIn.getNextEntry();
        // iterates over entries in the zip file
        while (entry != null) {
            String filePath = destDir.getAbsolutePath() + File.separator + entry.getName();
            if (!entry.isDirectory()) {
                // if the entry is a file, extracts it
                extractFile(zipIn, filePath);
            } else {
                // if the entry is a directory, make the directory
                File dir = new File(filePath);
                dir.mkdir();
            }
            zipIn.closeEntry();
            entry = zipIn.getNextEntry();
        }
        zipIn.close();
    }

    private static void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
        byte[] bytesIn = new byte[4096];
        int read = 0;
        while ((read = zipIn.read(bytesIn)) != -1) {
            bos.write(bytesIn, 0, read);
        }
        bos.close();
    }

}