/*
* Copyright 2007 Masatoshi sato.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sd_network.vfsshell.command;
import java.io.File;
import java.io.IOException;
import java.io.FileOutputStream;
import java.util.logging.Logger;
import java.util.logging.Level;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.cli.PosixParser;
import org.sd_network.vfs.FileSession;
import org.sd_network.vfs.SessionException;
import org.sd_network.vfs.VfsContext;
import org.sd_network.vfs.VfsIOException;
import org.sd_network.vfs.VfsService;
import org.sd_network.vfs.db.SystemInfo;
import org.sd_network.vfs.db.VfsFile;
import org.sd_network.vfsshell.CommandHandlerBase;
import org.sd_network.vfsshell.Session;
public class Download
extends CommandHandlerBase
{
/** Logger. */
private static final Logger _log = Logger.getLogger(
Download.class.getName());
private static final Options _options;
static {
Options buf = new Options();
_options = buf;
};
public void execute(String[] args) {
// check session.
Session session = Session.getInstance();
String sessionID = session.getSessionID();
if (sessionID == null) {
System.out.println("ERROR: You must login.");
return;
}
VfsService vfsService = VfsContext.getService();
CommandLine cl = null;
try {
cl = new PosixParser().parse(_options, args);
} catch (ParseException e) {
printUsage(e.getMessage());
return;
}
if (cl.getArgs() == null || cl.getArgs().length != 2) {
printUsage("ERROR: require local_file_path and vfs_file_name");
return;
}
// check file path.
File file = new File(cl.getArgs()[1]);
if (file.exists()) {
System.out.println("ERROR: the local file already exists.");
return;
}
SystemInfo systemInfo = vfsService.getSystemInfo();
String parentFileID = session.getCurrentDirectory().getID();
String fileSessionID = null;
try {
VfsFile vfsFile = vfsService.getVfsFile(
sessionID, parentFileID, cl.getArgs()[0]);
if (vfsFile == null) {
System.out.println("ERROR: the VfsFile not found.");
return;
}
fileSessionID = vfsService.createFileSession(
sessionID, vfsFile.getID(), FileSession.Mode.READ);
byte[] buf = new byte[systemInfo.getBytesPerRead()];
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file);
int count = 0;
while ((count = vfsService.readData(sessionID, fileSessionID, buf, buf.length)) != -1)
{
fos.write(buf, 0, count);
}
} catch (IOException e) {
e.printStackTrace(System.err);
} finally {
if (fos != null)
try {
fos.close();
} catch (IOException e) {
}
}
} catch (Exception e) {
e.printStackTrace(System.err);
} finally {
if (fileSessionID != null)
try {
vfsService.closeFileSession(sessionID, fileSessionID);
} catch (Exception e) {
e.printStackTrace(System.err);
}
}
}
public void printUsage(String errorMessage) {
System.out.println(errorMessage);
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp("download [options] vfs_file local_file_path", _options);
}
}