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/*******************************************************************************
* Copyright (c) 2011, 2014 Wind River Systems, 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.core.internal.operations;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.url.TcfURLConnection;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.utils.CacheManager;
import org.eclipse.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.nls.Messages;
/**
* Download multiple files from local system to a remote system.
*/
public class OpDownload extends OpStreamOp {
// The destination files to be downloaded to.
protected File[] dstFiles;
// The source nodes to be downloaded from.
protected FSTreeNode[] srcNodes;
/**
* Create a download operation to download a file node
* to a local file.
*
* @param dstFile The local file to be downloaded to.
* @param srcNode The source node to be downloaded from.
*/
public OpDownload(File dstFile, FSTreeNode srcNode) {
this(new File[]{dstFile}, new FSTreeNode[]{srcNode});
}
/**
* Create a download operation to download file nodes
* to local files.
*
* @param dstFiles The local files to be downloaded to.
* @param srcNodes The source nodes to be downloaded from.
*/
public OpDownload(File[] dstFiles, FSTreeNode[] srcNodes) {
this.dstFiles = dstFiles;
this.srcNodes = srcNodes;
}
/**
* Create a download operation to download specified nodes
* to its local cache files.
*
* @param srcNodes The source file nodes to be downloaded.
*/
public OpDownload(FSTreeNode... srcNodes) {
this.srcNodes = srcNodes;
this.dstFiles = new File[srcNodes.length];
for (int i = 0; i < srcNodes.length; i++) {
this.dstFiles[i] = CacheManager.getCacheFile(srcNodes[i]);
}
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.Operation#run(org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
super.run(monitor);
try {
downloadFiles(dstFiles, srcNodes);
if(monitor.isCanceled()) throw new InterruptedException();
} catch (MalformedURLException e) {
throw new InvocationTargetException(e, e.getLocalizedMessage());
} catch (IOException e) {
throw new InvocationTargetException(e, e.getLocalizedMessage());
} finally {
monitor.done();
}
}
/**
* Download the specified file list to the specified locations, reporting the progress
* using the specified monitor.
*
* @param dstFiles The file list to be downloaded to.
* @param srcNodes The node list to be downloaded from.
* @param monitor The monitor that reports progress.
* @throws IOException The exception reported during downloading.
*/
private void downloadFiles(File[] dstFiles, FSTreeNode[] srcNodes) throws IOException {
// The buffer used to download the file.
byte[] data = new byte[DEFAULT_CHUNK_SIZE];
// Calculate the total size.
long totalSize = 0;
for (FSTreeNode node:srcNodes) {
totalSize += node.attr == null ? 0L : node.attr.size;
}
// Calculate the chunk size of one percent.
int chunk_size = (int) totalSize / 100;
// The current reading percentage.
int percentRead = 0;
// The current length of read bytes.
long bytesRead = 0;
for (int i = 0; i < srcNodes.length && !monitor.isCanceled(); i++) {
FSTreeNode node = srcNodes[i];
long size = node.attr == null ? 0L : node.attr.size;
MessageDigest digest = null;
BufferedInputStream input = null;
BufferedOutputStream output = null;
try {
URL url = node.getLocationURL();
TcfURLConnection connection = (TcfURLConnection) url.openConnection();
try {
digest = MessageDigest.getInstance(MD_ALG);
input = new BufferedInputStream(new DigestInputStream(connection.getInputStream(), digest));
}
catch (NoSuchAlgorithmException e) {
input = new BufferedInputStream(connection.getInputStream());
}
output = new BufferedOutputStream(new FileOutputStream(dstFiles[i]));
// Total size displayed on the progress dialog.
String fileLength = formatSize(size);
int length;
while ((length = input.read(data)) >= 0 && !monitor.isCanceled()) {
output.write(data, 0, length);
output.flush();
bytesRead += length;
if (chunk_size != 0) {
int percent = (int) bytesRead / chunk_size;
if (percent != percentRead) { // Update the progress.
monitor.worked(percent - percentRead);
percentRead = percent; // Remember the percentage.
// Report the progress.
monitor.subTask(NLS.bind(Messages.OpDownload_Downloading, new Object[]{node.name, formatSize(bytesRead), fileLength}));
}
}
}
}
finally {
if (output != null) {
try {
output.close();
} catch (Exception e) {
}
}
if (input != null) {
try {
input.close();
} catch (Exception e) {
}
}
if(digest != null) {
updateNodeDigest(node, digest.digest());
}
}
}
}
/**
* Update the node's digest using the digest data.
*
* @param node The node whose digest should updated.
* @param digest The digest data.
*/
protected void updateNodeDigest(FSTreeNode node, byte[] digest) {
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.interfaces.IOperation#getName()
*/
@Override
public String getName() {
String message;
if(dstFiles.length==1)
message = NLS.bind(Messages.OpDownload_DownloadingSingleFile, dstFiles[0].getName());
else
message = NLS.bind(Messages.OpDownload_DownloadingMultipleFiles, Long.valueOf(dstFiles.length));
return message;
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.interfaces.IOperation#getTotalWork()
*/
@Override
public int getTotalWork() {
return 100;
}
}
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