forked from I2P_Developers/i2p.i2p
This is an I2P port of snark [http://klomp.org/snark], a GPL'ed bittorrent client
The build in tracker has been removed for simplicity.
Example usage:
java -jar lib/i2psnark.jar myFile.torrent
or, a more verbose setting:
java -jar lib/i2psnark.jar --eepproxy 127.0.0.1 4444 \
--i2cp 127.0.0.1 7654 "inbound.length=2 outbound.length=2" \
--debug 6 myFile.torrent
This commit is contained in:
jrandom
254
apps/i2psnark/java/src/org/klomp/snark/TrackerClient.java
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254
apps/i2psnark/java/src/org/klomp/snark/TrackerClient.java
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/* TrackerClient - Class that informs a tracker and gets new peers.
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Copyright (C) 2003 Mark J. Wielaard
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This file is part of Snark.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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package org.klomp.snark;
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import java.io.*;
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import java.net.*;
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import java.util.*;
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import org.klomp.snark.bencode.*;
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/**
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* Informs metainfo tracker of events and gets new peers for peer
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* coordinator.
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*
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* @author Mark Wielaard (mark@klomp.org)
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*/
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public class TrackerClient extends Thread
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{
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private static final String NO_EVENT = "";
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private static final String STARTED_EVENT = "started";
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private static final String COMPLETED_EVENT = "completed";
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private static final String STOPPED_EVENT = "stopped";
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private final static int SLEEP = 5; // 5 minutes.
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private final MetaInfo meta;
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private final PeerCoordinator coordinator;
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private final int port;
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private boolean stop;
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private long interval;
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private long lastRequestTime;
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public TrackerClient(MetaInfo meta, PeerCoordinator coordinator)
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{
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// Set unique name.
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super("TrackerClient-" + urlencode(coordinator.getID()));
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this.meta = meta;
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this.coordinator = coordinator;
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this.port = 6881; //(port == -1) ? 9 : port;
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stop = false;
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}
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/**
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* Interrupts this Thread to stop it.
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*/
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public void halt()
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{
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stop = true;
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this.interrupt();
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}
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public void run()
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{
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// XXX - Support other IPs
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String announce = I2PSnarkUtil.instance().rewriteAnnounce(meta.getAnnounce());
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String infoHash = urlencode(meta.getInfoHash());
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String peerID = urlencode(coordinator.getID());
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long uploaded = coordinator.getUploaded();
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long downloaded = coordinator.getDownloaded();
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long left = coordinator.getLeft();
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boolean completed = (left == 0);
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try
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{
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boolean started = false;
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while (!started)
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{
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try
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{
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// Send start.
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TrackerInfo info = doRequest(announce, infoHash, peerID,
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uploaded, downloaded, left,
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STARTED_EVENT);
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Iterator it = info.getPeers().iterator();
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while (it.hasNext())
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coordinator.addPeer((Peer)it.next());
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started = true;
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}
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catch (IOException ioe)
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{
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// Probably not fatal (if it doesn't last to long...)
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Snark.debug
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("WARNING: Could not contact tracker at '"
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+ announce + "': " + ioe, Snark.WARNING);
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}
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if (!started && !stop)
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{
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Snark.debug(" Retrying in one minute...", Snark.DEBUG);
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try
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{
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// Sleep one minutes...
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Thread.sleep(60*1000);
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}
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catch(InterruptedException interrupt)
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{
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// ignore
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}
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}
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}
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while(!stop)
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{
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try
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{
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// Sleep some minutes...
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Thread.sleep(SLEEP*60*1000);
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}
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catch(InterruptedException interrupt)
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{
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// ignore
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}
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if (stop)
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break;
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uploaded = coordinator.getUploaded();
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downloaded = coordinator.getDownloaded();
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left = coordinator.getLeft();
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// First time we got a complete download?
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String event;
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if (!completed && left == 0)
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{
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completed = true;
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event = COMPLETED_EVENT;
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}
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else
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event = NO_EVENT;
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// Only do a request when necessary.
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if (event == COMPLETED_EVENT
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|| coordinator.needPeers()
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|| System.currentTimeMillis() > lastRequestTime + interval)
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{
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try
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{
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TrackerInfo info = doRequest(announce, infoHash, peerID,
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uploaded, downloaded, left,
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event);
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Iterator it = info.getPeers().iterator();
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while (it.hasNext())
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coordinator.addPeer((Peer)it.next());
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}
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catch (IOException ioe)
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{
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// Probably not fatal (if it doesn't last to long...)
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Snark.debug
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("WARNING: Could not contact tracker at '"
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+ announce + "': " + ioe, Snark.WARNING);
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}
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}
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}
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}
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catch (Throwable t)
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{
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Snark.debug("TrackerClient: " + t, Snark.ERROR);
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t.printStackTrace();
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}
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finally
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{
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try
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{
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TrackerInfo info = doRequest(announce, infoHash, peerID, uploaded,
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downloaded, left, STOPPED_EVENT);
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}
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catch(IOException ioe) { /* ignored */ }
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}
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}
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private TrackerInfo doRequest(String announce, String infoHash,
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String peerID, long uploaded,
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long downloaded, long left, String event)
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throws IOException
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{
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String s = announce
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+ "?info_hash=" + infoHash
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+ "&peer_id=" + peerID
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+ "&port=" + port
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+ "&ip=" + I2PSnarkUtil.instance().getOurIPString()
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+ "&uploaded=" + uploaded
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+ "&downloaded=" + downloaded
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+ "&left=" + left
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+ ((event != NO_EVENT) ? ("&event=" + event) : "");
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if (Snark.debug >= Snark.INFO)
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Snark.debug("Sending TrackerClient request: " + s, Snark.INFO);
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File fetched = I2PSnarkUtil.instance().get(s);
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if (fetched == null) {
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throw new IOException("Error fetching " + s);
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}
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fetched.deleteOnExit();
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InputStream in = new FileInputStream(fetched);
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TrackerInfo info = new TrackerInfo(in, coordinator.getID(),
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coordinator.getMetaInfo());
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if (Snark.debug >= Snark.INFO)
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Snark.debug("TrackerClient response: " + info, Snark.INFO);
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lastRequestTime = System.currentTimeMillis();
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String failure = info.getFailureReason();
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if (failure != null)
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throw new IOException(failure);
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interval = info.getInterval() * 1000;
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return info;
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}
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/**
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* Very lazy byte[] to URL encoder. Just encodes everything, even
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* "normal" chars.
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*/
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static String urlencode(byte[] bs)
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{
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StringBuffer sb = new StringBuffer(bs.length*3);
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for (int i = 0; i < bs.length; i++)
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{
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int c = bs[i] & 0xFF;
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sb.append('%');
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if (c < 16)
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sb.append('0');
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sb.append(Integer.toHexString(c));
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}
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return sb.toString();
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}
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}
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