/*************************************************************************
* Copyright 2009-2012 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.objectstorage.bittorrent;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.log4j.Logger;
import com.eucalyptus.crypto.Crypto;
import com.eucalyptus.objectstorage.util.ObjectStorageProperties;
import com.eucalyptus.records.Logs;
import edu.ucsb.eucalyptus.util.StreamConsumer;
public class TorrentCreator {
private static Logger LOG = Logger.getLogger(TorrentCreator.class);
private String torrentFilePath;
private String filePath;
private String trackerUrl;
private String objectKey;
private String objectName;
private final String NAME_TAG = "name";
public TorrentCreator(String filePath, String objectKey, String objectName, String torrentFilePath, String trackerUrl) {
this.filePath = filePath;
this.torrentFilePath = torrentFilePath;
this.trackerUrl = trackerUrl;
this.objectKey = objectKey;
this.objectName = objectName;
}
private void makeTorrent() {
new File(ObjectStorageProperties.TRACKER_DIR).mkdirs();
try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(new String[] {ObjectStorageProperties.TORRENT_CREATOR_BINARY, filePath, trackerUrl, "--target", torrentFilePath});
StreamConsumer error = new StreamConsumer(proc.getErrorStream());
StreamConsumer output = new StreamConsumer(proc.getInputStream());
error.start();
output.start();
int pid = proc.waitFor();
output.join();
String errValue = error.getReturnValue();
String outValue = output.getReturnValue();
if (errValue.length() > 0)
LOG.warn(errValue);
if (outValue.length() > 0)
LOG.warn(outValue);
} catch (Exception t) {
LOG.error(t);
}
}
private void changeName() throws Exception {
File inFile = new File(torrentFilePath);
File outFile = new File(torrentFilePath + Crypto.getRandom( 6 ));
BufferedInputStream inStream = new BufferedInputStream(new FileInputStream(inFile));
BufferedOutputStream outStream = new BufferedOutputStream(new FileOutputStream(outFile));
int bytesRead;
int totalBytesRead = 0;
byte[] bytes = new byte[102400];
String inString = "";
try {
while ((bytesRead = inStream.read(bytes)) > 0) {
inString += new String(bytes, 0, bytesRead);
totalBytesRead += bytesRead;
}
} catch (IOException ex) {
LOG.error(ex);
Logs.extreme().error(ex, ex);
throw ex;
} finally {
try {
inStream.close();
} catch (IOException ex) {
LOG.error(ex);
}
}
int len = inString.length();
int idx = inString.indexOf(NAME_TAG);
int lastidx = inString.indexOf(objectName) + objectName.length();
try {
outStream.write(bytes, 0, idx + NAME_TAG.length());
outStream.write(new String(objectKey.length() + ":" + objectKey).getBytes());
outStream.write(bytes, lastidx, totalBytesRead - lastidx);
} catch (IOException ex) {
LOG.error(ex);
Logs.extreme().error(ex, ex);
throw ex;
} finally {
try {
outStream.close();
} catch (IOException ex) {
LOG.error(ex);
}
}
outFile.renameTo(inFile);
}
public void create() throws Exception {
makeTorrent();
changeName();
}
}