// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.plugins.opendata.core.modules;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.awt.Component;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collection;
import java.util.LinkedList;
import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.Version;
import org.openstreetmap.josm.gui.PleaseWaitRunnable;
import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
import org.openstreetmap.josm.gui.progress.ProgressMonitor;
import org.openstreetmap.josm.plugins.opendata.OdPlugin;
import org.openstreetmap.josm.tools.CheckParameterUtil;
import org.xml.sax.SAXException;
/**
* Asynchronous task for downloading a collection of modules.
*
* When the task is finished {@see #getDownloadedModules()} replies the list of downloaded modules
* and {@see #getFailedModules()} replies the list of failed modules.
*
*/
public class ModuleDownloadTask extends PleaseWaitRunnable {
private final Collection<ModuleInformation> toUpdate = new LinkedList<>();
private final Collection<ModuleInformation> failed = new LinkedList<>();
private final Collection<ModuleInformation> downloaded = new LinkedList<>();
//private Exception lastException;
private boolean canceled;
private HttpURLConnection downloadConnection;
/**
* Creates the download task
*
* @param parent the parent component relative to which the {@see PleaseWaitDialog} is displayed
* @param toUpdate a collection of module descriptions for modules to update/download. Must not be null.
* @param title the title to display in the {@see PleaseWaitDialog}
* @throws IllegalArgumentException thrown if toUpdate is null
*/
public ModuleDownloadTask(Component parent, Collection<ModuleInformation> toUpdate, String title) throws IllegalArgumentException {
super(parent, title == null ? "" : title, false /* don't ignore exceptions */);
CheckParameterUtil.ensureParameterNotNull(toUpdate, "toUpdate");
this.toUpdate.addAll(toUpdate);
}
/**
* Creates the task
*
* @param monitor a progress monitor. Defaults to {@see NullProgressMonitor#INSTANCE} if null
* @param toUpdate a collection of module descriptions for modules to update/download. Must not be null.
* @param title the title to display in the {@see PleaseWaitDialog}
* @throws IllegalArgumentException thrown if toUpdate is null
*/
public ModuleDownloadTask(ProgressMonitor monitor, Collection<ModuleInformation> toUpdate, String title) {
super(title, monitor == null ? NullProgressMonitor.INSTANCE : monitor, false /* don't ignore exceptions */);
CheckParameterUtil.ensureParameterNotNull(toUpdate, "toUpdate");
this.toUpdate.addAll(toUpdate);
}
/**
* Sets the collection of modules to update.
*
* @param toUpdate the collection of modules to update. Must not be null.
* @throws IllegalArgumentException thrown if toUpdate is null
*/
public void setModulesToDownload(Collection<ModuleInformation> toUpdate) throws IllegalArgumentException {
CheckParameterUtil.ensureParameterNotNull(toUpdate, "toUpdate");
this.toUpdate.clear();
this.toUpdate.addAll(toUpdate);
}
@Override protected void cancel() {
this.canceled = true;
synchronized (this) {
if (downloadConnection != null) {
downloadConnection.disconnect();
}
}
}
@Override protected void finish() {}
protected void download(ModuleInformation pi, File file) throws ModuleDownloadException {
try {
if (pi.downloadlink == null) {
String msg = tr("Warning: Cannot download module ''{0}''. Its download link is not known. Skipping download.", pi.name);
Main.warn(msg);
throw new ModuleDownloadException(msg);
}
URL url = new URL(pi.downloadlink);
synchronized (this) {
downloadConnection = (HttpURLConnection) url.openConnection();
downloadConnection.setRequestProperty("Cache-Control", "no-cache");
downloadConnection.setRequestProperty("User-Agent", Version.getInstance().getAgentString());
downloadConnection.setRequestProperty("Host", url.getHost());
downloadConnection.connect();
}
try (
InputStream in = downloadConnection.getInputStream();
OutputStream out = new FileOutputStream(file)
) {
byte[] buffer = new byte[8192];
for (int read = in.read(buffer); read != -1; read = in.read(buffer)) {
out.write(buffer, 0, read);
}
}
} catch (MalformedURLException e) {
String msg = tr("Warning: Cannot download module ''{0}''. Its download link ''{1}'' is not a valid URL. Skipping download.",
pi.name, pi.downloadlink);
Main.warn(msg);
throw new ModuleDownloadException(msg);
} catch (IOException e) {
if (canceled)
return;
throw new ModuleDownloadException(e);
} finally {
synchronized (this) {
downloadConnection = null;
}
}
}
@Override protected void realRun() throws SAXException, IOException {
File moduleDir = OdPlugin.getInstance().getModulesDirectory();
if (!moduleDir.exists()) {
if (!moduleDir.mkdirs()) {
//lastException = new ModuleDownloadException(tr("Failed to create module directory ''{0}''", moduleDir.toString()));
failed.addAll(toUpdate);
return;
}
}
getProgressMonitor().setTicksCount(toUpdate.size());
for (ModuleInformation d : toUpdate) {
if (canceled) return;
progressMonitor.subTask(tr("Downloading Module {0}...", d.name));
progressMonitor.worked(1);
File moduleFile = new File(moduleDir, d.name + ".jar.new");
try {
download(d, moduleFile);
} catch (ModuleDownloadException e) {
e.printStackTrace();
failed.add(d);
continue;
}
downloaded.add(d);
}
ModuleHandler.installDownloadedModules(false);
}
/**
* Replies true if the task was canceled by the user
*
* @return {@code true} if the task was canceled by the user
*/
public boolean isCanceled() {
return canceled;
}
/**
* Replies the list of successfully downloaded modules
*
* @return the list of successfully downloaded modules
*/
public Collection<ModuleInformation> getFailedModules() {
return failed;
}
/**
* Replies the list of modules whose download has failed
*
* @return the list of modules whose download has failed
*/
public Collection<ModuleInformation> getDownloadedModules() {
return downloaded;
}
}