public File downloadUpdate(LauncherVersion remoteVersion, String format) throws IOException {
if (remoteVersion.getSource() == null) { // malformed file, or local version
throw new RuntimeException("Invalid remote version: source is null");
}
// check current format
String remoteURL = remoteVersion.getSource() + format;
String fileName =
"mualauncher_" + remoteVersion.getVersion() + "_" + remoteVersion.getBuild() + "-";
File temporaryFile = File.createTempFile(fileName, format);
DownloadAdapter downloader = Downloader.create(remoteURL);
DownloadWindow window = new DownloadWindow(Resources.string("selfupdate_title"));
downloader.setDownloadListener(window);
downloader.downloadToFile(temporaryFile);
window.dispose(); // not needed anymore
return temporaryFile;
}
public void updateLauncher() {
Logger.info("Checking lastest version");
LauncherVersion localVersion = LauncherVersion.getLocalVersion();
Logger.info("Local version is %s", localVersion);
LauncherVersion remoteVersion = fetchRemoteVersion();
Logger.info("Remote version is %s", remoteVersion);
if (localVersion.compareTo(remoteVersion) >= 0) { // already lastest version
Logger.info("Already lastest version (%s/%s", localVersion, remoteVersion);
return;
}
Logger.info("Performing update to %s", remoteVersion);
try {
File localBinary = getLocalFile();
String format = getExtension(localBinary);
Logger.info("Local file: %s", localBinary.getAbsolutePath());
Logger.info("Downloading update");
File tempUpdater = downloadUpdate(remoteVersion, format);
Logger.info("Downloaded update to %s", tempUpdater.getAbsolutePath());
Logger.info("Launching self-updater");
String updater = tempUpdater.getAbsolutePath();
PlatformUtils.launchJavaApplication(
updater,
LauncherUpdater.class.getCanonicalName(),
updater,
localBinary.getAbsolutePath());
Logger.info("Now exiting to unlock file");
System.exit(0);
Logger.info("If you are watching this you are pretty much a pirate now!");
} catch (IOException e) {
Logger.error("Error during launcher update: ", e.getMessage());
}
}
public LauncherVersion fetchRemoteVersion() {
try {
String versionJson = Downloader.create(removeVersionURL).downloadToString();
return LauncherVersion.fromJson(versionJson);
} catch (Throwable e) {
Logger.warning("Unable to fetch remote version: %s", e.getMessage());
e.printStackTrace();
}
return null;
}