/*******************************************************************************
* Copyright (c) 2010, 2013 Red Hat Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Alexander Kurtakov (Red Hat) - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.rpm.core.utils;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLConnection;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.linuxtools.internal.rpm.core.utils.Messages;
import org.eclipse.linuxtools.rpm.core.IRPMConstants;
import org.eclipse.osgi.util.NLS;
/**
* Eclipse job to ease downloading remote files.
*
*/
public class DownloadJob extends Job {
private IFile file;
private URLConnection content;
private static final int MULTIPLIER = 5;
private static final int KB = 1024;
/**
* Creates the download job.
* @param file The file to store the remote content.
* @param content The URLConnection to the remote file.
*/
public DownloadJob(IFile file, URLConnection content) {
super(NLS.bind(Messages.DownloadJob_0, file.getName()));
this.file = file;
this.content = content;
}
@Override
public IStatus run(IProgressMonitor monitor) {
monitor.beginTask(NLS.bind(Messages.DownloadJob_0, file.getName()), content.getContentLength());
try {
File tempFile = File.createTempFile(file.getName(), ""); //$NON-NLS-1$
boolean canceled = false;
try (FileOutputStream fos = new FileOutputStream(tempFile);
InputStream is = new BufferedInputStream(content.getInputStream())) {
int b;
byte buf[] = new byte[MULTIPLIER * KB]; // 5kB buffer
while ((b = is.read(buf)) != -1) {
if (monitor.isCanceled()) {
canceled = true;
break;
}
fos.write(buf, 0, b);
monitor.worked(1);
}
}
if (!canceled) {
// override the previous file if there is one
if (file.exists()) {
file.setContents(new FileInputStream(tempFile), true, false, monitor);
} else {
file.create(new FileInputStream(tempFile), true, monitor);
}
}
tempFile.delete();
} catch (CoreException | IOException e) {
Platform.getLog(Platform.getBundle(IRPMConstants.RPM_CORE_ID))
.log(new Status(IStatus.ERROR, IRPMConstants.RPM_CORE_ID, e.getMessage(), e));
return Status.CANCEL_STATUS;
}
monitor.done();
return Status.OK_STATUS;
}
}