[5587] | 1 | // License: GPL. For details, see LICENSE file.
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[5114] | 2 | package org.openstreetmap.josm.gui.io;
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| 3 |
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| 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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| 6 | import java.awt.Component;
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| 7 | import java.io.BufferedOutputStream;
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| 8 | import java.io.File;
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| 9 | import java.io.FileOutputStream;
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| 10 | import java.io.IOException;
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| 11 | import java.io.InputStream;
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| 12 | import java.io.OutputStream;
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| 13 | import java.net.HttpURLConnection;
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| 14 | import java.net.MalformedURLException;
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| 15 | import java.net.URL;
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| 16 | import java.util.Enumeration;
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| 17 | import java.util.zip.ZipEntry;
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| 18 | import java.util.zip.ZipFile;
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[5587] | 19 |
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[5114] | 20 | import org.openstreetmap.josm.gui.PleaseWaitDialog;
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| 21 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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| 22 | import org.openstreetmap.josm.tools.Utils;
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| 23 | import org.xml.sax.SAXException;
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| 24 |
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| 25 | /**
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[5587] | 26 | * Asynchronous task for downloading and unpacking arbitrary file lists
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| 27 | * Shows progress bar when downloading
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[5114] | 28 | */
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| 29 | public class DownloadFileTask extends PleaseWaitRunnable{
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| 30 | private final String address;
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| 31 | private final File file;
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| 32 | private final boolean mkdir;
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| 33 | private final boolean unpack;
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| 34 |
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| 35 | /**
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| 36 | * Creates the download task
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| 37 | *
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[5266] | 38 | * @param parent the parent component relative to which the {@link PleaseWaitDialog} is displayed
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[5874] | 39 | * @param address the URL to download
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| 40 | * @param file The destination file
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| 41 | * @param mkdir {@code true} if the destination directory must be created, {@code false} otherwise
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| 42 | * @param unpack {@code true} if zip archives must be unpacked recursively, {@code false} otherwise
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| 43 | * @throws IllegalArgumentException if {@code parent} is null
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[5114] | 44 | */
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| 45 | public DownloadFileTask(Component parent, String address, File file, boolean mkdir, boolean unpack) {
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| 46 | super(parent, tr("Downloading file"), false);
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| 47 | this.address = address;
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| 48 | this.file = file;
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| 49 | this.mkdir = mkdir;
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| 50 | this.unpack = unpack;
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| 51 | }
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| 52 |
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| 53 | private static class DownloadException extends Exception {
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| 54 | public DownloadException(String msg) {
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| 55 | super(msg);
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | private boolean canceled;
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[5587] | 60 | private HttpURLConnection downloadConnection;
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[5114] | 61 |
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| 62 | private synchronized void closeConnectionIfNeeded() {
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[5587] | 63 | if (downloadConnection != null) {
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| 64 | downloadConnection.disconnect();
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[5114] | 65 | }
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| 66 | downloadConnection = null;
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| 67 | }
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| 68 |
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| 69 |
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| 70 | @Override
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| 71 | protected void cancel() {
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| 72 | this.canceled = true;
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| 73 | closeConnectionIfNeeded();
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| 74 | }
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| 75 |
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| 76 | @Override
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| 77 | protected void finish() {}
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| 78 |
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[5874] | 79 | /**
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| 80 | * Performs download.
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| 81 | * @throws DownloadException if the URL is invalid or if any I/O error occurs.
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| 82 | */
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[5114] | 83 | public void download() throws DownloadException {
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| 84 | OutputStream out = null;
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| 85 | InputStream in = null;
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| 86 | try {
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| 87 | if (mkdir) {
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| 88 | File newDir = file.getParentFile();
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| 89 | if (!newDir.exists()) {
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| 90 | newDir.mkdirs();
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | URL url = new URL(address);
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| 95 | int size;
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| 96 | synchronized(this) {
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[5587] | 97 | downloadConnection = Utils.openHttpConnection(url);
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[5114] | 98 | downloadConnection.setRequestProperty("Cache-Control", "no-cache");
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| 99 | downloadConnection.connect();
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| 100 | size = downloadConnection.getContentLength();
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| 101 | }
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| 102 |
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| 103 | progressMonitor.setTicksCount(100);
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| 104 | progressMonitor.subTask(tr("Downloading File {0}: {1} bytes...", file.getName(),size));
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| 105 |
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| 106 | in = downloadConnection.getInputStream();
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| 107 | out = new FileOutputStream(file);
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| 108 | byte[] buffer = new byte[32768];
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| 109 | int count=0;
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| 110 | int p1=0, p2=0;
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| 111 | for (int read = in.read(buffer); read != -1; read = in.read(buffer)) {
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| 112 | out.write(buffer, 0, read);
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| 113 | count+=read;
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[5874] | 114 | if (canceled) break;
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[5114] | 115 | p2 = 100 * count / size;
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| 116 | if (p2!=p1) {
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| 117 | progressMonitor.setTicks(p2);
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| 118 | p1=p2;
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| 119 | }
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| 120 | }
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[5874] | 121 | Utils.close(out);
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| 122 | if (!canceled) {
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| 123 | System.out.println(tr("Download finished"));
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| 124 | if (unpack) {
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| 125 | System.out.println(tr("Unpacking {0} into {1}", file.getAbsolutePath(), file.getParent()));
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| 126 | unzipFileRecursively(file, file.getParent());
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| 127 | file.delete();
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| 128 | }
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[5114] | 129 | }
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| 130 | } catch(MalformedURLException e) {
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| 131 | String msg = tr("Warning: Cannot download file ''{0}''. Its download link ''{1}'' is not a valid URL. Skipping download.", file.getName(), address);
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| 132 | System.err.println(msg);
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| 133 | throw new DownloadException(msg);
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| 134 | } catch (IOException e) {
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| 135 | if (canceled)
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| 136 | return;
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| 137 | throw new DownloadException(e.getMessage());
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| 138 | } finally {
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| 139 | closeConnectionIfNeeded();
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| 140 | Utils.close(out);
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| 141 | }
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| 142 | }
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| 143 |
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| 144 | @Override
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| 145 | protected void realRun() throws SAXException, IOException {
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| 146 | if (canceled) return;
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| 147 | try {
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| 148 | download();
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| 149 | } catch(DownloadException e) {
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| 150 | e.printStackTrace();
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| 151 | }
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| 152 | }
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| 153 |
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| 154 | /**
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| 155 | * Replies true if the task was canceled by the user
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| 156 | *
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[5874] | 157 | * @return {@code true} if the task was canceled by the user, {@code false} otherwise
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[5114] | 158 | */
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| 159 | public boolean isCanceled() {
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| 160 | return canceled;
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| 161 | }
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| 162 |
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| 163 | /**
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| 164 | * Recursive unzipping function
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| 165 | * TODO: May be placed somewhere else - Tools.Utils?
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| 166 | * @param file
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| 167 | * @param dir
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| 168 | * @throws IOException
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| 169 | */
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| 170 | public static void unzipFileRecursively(File file, String dir) throws IOException {
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| 171 | OutputStream os = null;
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| 172 | InputStream is = null;
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| 173 | ZipFile zf = null;
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| 174 | try {
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| 175 | zf = new ZipFile(file);
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[5587] | 176 | Enumeration<?> es = zf.entries();
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[5114] | 177 | ZipEntry ze;
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| 178 | while (es.hasMoreElements()) {
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| 179 | ze = (ZipEntry) es.nextElement();
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| 180 | File newFile = new File(dir, ze.getName());
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| 181 | if (ze.isDirectory()) {
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| 182 | newFile.mkdirs();
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| 183 | } else {
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| 184 | is = zf.getInputStream(ze);
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| 185 | os = new BufferedOutputStream(new FileOutputStream(newFile));
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| 186 | byte[] buffer = new byte[8192];
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| 187 | int read;
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| 188 | while ((read = is.read(buffer)) != -1) {
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| 189 | os.write(buffer, 0, read);
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| 190 | }
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[5874] | 191 | Utils.close(os);
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| 192 | Utils.close(is);
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[5114] | 193 | }
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| 194 | }
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| 195 | } finally {
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[5874] | 196 | Utils.close(zf);
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[5114] | 197 | }
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| 198 | }
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| 199 | }
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| 200 |
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