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ktorrent/libktorrent/torrent/httptracker.cpp

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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <config.h>
#include <kurl.h>
#include <klocale.h>
#include <tqhostaddress.h>
#include <util/log.h>
#include <util/functions.h>
#include <util/error.h>
#include <util/waitjob.h>
#include <interfaces/exitoperation.h>
#include <kio/job.h>
#include <kio/netaccess.h>
#include <kio/scheduler.h>
#include "bnode.h"
#include "httptracker.h"
#include "torrentcontrol.h"
#include "bdecoder.h"
#include "peermanager.h"
#include "server.h"
#include "globals.h"
#include "settings.h"
using namespace kt;
namespace bt
{
HTTPTracker::HTTPTracker(const KURL & url,kt::TorrentInterface* tor,const PeerID & id,int tier)
: Tracker(url,tor,id,tier)
{
active_job = 0;
interval = 5 * 60; // default interval 5 minutes
failures = 0;
seeders = leechers = 0;
}
HTTPTracker::~HTTPTracker()
{
}
void HTTPTracker::start()
{
event = "started";
doRequest();
}
void HTTPTracker::stop(WaitJob* wjob)
{
if (!started)
return;
event = "stopped";
doRequest(wjob);
started = false;
}
void HTTPTracker::completed()
{
event = "completed";
doRequest();
event = TQString();
}
void HTTPTracker::manualUpdate()
{
if (!started)
event = "started";
doRequest();
}
void HTTPTracker::scrape()
{
if (!url.isValid())
{
Out(SYS_TRK|LOG_NOTICE) << "Invalid tracker url, canceling scrape" << endl;
return;
}
if (!url.fileName(false).startsWith("announce"))
{
Out(SYS_TRK|LOG_NOTICE) << "Tracker " << url << " does not support scraping" << endl;
return;
}
KURL scrape_url = url;
scrape_url.setFileName(url.fileName(false).replace("announce","scrape"));
TQString epq = scrape_url.encodedPathAndQuery();
const SHA1Hash & info_hash = tor->getInfoHash();
if (scrape_url.queryItems().count() > 0)
epq += "&info_hash=" + info_hash.toURLString();
else
epq += "?info_hash=" + info_hash.toURLString();
scrape_url.setEncodedPathAndQuery(epq);
Out(SYS_TRK|LOG_NOTICE) << "Doing scrape request to url : " << scrape_url.prettyURL() << endl;
KIO::MetaData md;
setupMetaData(md);
KIO::StoredTransferJob* j = KIO::storedGet(scrape_url,false,false);
// set the meta data
j->setMetaData(md);
KIO::Scheduler::scheduleJob(j);
connect(j,TQT_SIGNAL(result(KIO::Job* )),this,TQT_SLOT(onScrapeResult( KIO::Job* )));
}
void HTTPTracker::onScrapeResult(KIO::Job* j)
{
if (j->error())
{
Out(SYS_TRK|LOG_IMPORTANT) << "Scrape failed : " << j->errorString() << endl;
return;
}
KIO::StoredTransferJob* st = (KIO::StoredTransferJob*)j;
BDecoder dec(st->data(),false,0);
BNode* n = 0;
try
{
n = dec.decode();
}
catch (bt::Error & err)
{
Out(SYS_TRK|LOG_IMPORTANT) << "Invalid scrape data " << err.toString() << endl;
return;
}
if (n && n->getType() == BNode::DICT)
{
BDictNode* d = (BDictNode*)n;
d = d->getDict(TQString("files"));
if (d)
{
d = d->getDict(tor->getInfoHash().toByteArray());
if (d)
{
BValueNode* vn = d->getValue("complete");
if (vn && vn->data().getType() == Value::INT)
{
seeders = vn->data().toInt();
}
vn = d->getValue("incomplete");
if (vn && vn->data().getType() == Value::INT)
{
leechers = vn->data().toInt();
}
Out(SYS_TRK|LOG_DEBUG) << "Scrape : leechers = " << leechers
<< ", seeders = " << seeders << endl;
}
}
}
delete n;
}
void HTTPTracker::doRequest(WaitJob* wjob)
{
const TorrentStats & s = tor->getStats();
KURL u = url;
if (!url.isValid())
{
requestPending();
TQTimer::singleShot(500,this,TQT_SLOT(emitInvalidURLFailure()));
return;
}
Uint16 port = Globals::instance().getServer().getPortInUse();;
u.addQueryItem("peer_id",peer_id.toString());
u.addQueryItem("port",TQString::number(port));
u.addQueryItem("uploaded",TQString::number(s.trk_bytes_uploaded));
u.addQueryItem("downloaded",TQString::number(s.trk_bytes_downloaded));
if (event == "completed")
u.addQueryItem("left","0"); // need to send 0 when we are completed
else
u.addQueryItem("left",TQString::number(s.bytes_left));
u.addQueryItem("compact","1");
if (event != "stopped")
u.addQueryItem("numwant","100");
else
u.addQueryItem("numwant","0");
u.addQueryItem("key",TQString::number(key));
TQString cip = Tracker::getCustomIP();
if (!cip.isNull())
u.addQueryItem("ip",cip);
if (event != TQString())
u.addQueryItem("event",event);
TQString epq = u.encodedPathAndQuery();
const SHA1Hash & info_hash = tor->getInfoHash();
epq += "&info_hash=" + info_hash.toURLString();
u.setEncodedPathAndQuery(epq);
if (active_job)
{
announce_queue.append(u);
Out(SYS_TRK|LOG_NOTICE) << "Announce ongoing, queueing announce" << endl;
}
else
{
doAnnounce(u);
// if there is a wait job, add this job to the waitjob
if (wjob)
wjob->addExitOperation(new kt::ExitJobOperation(active_job));
}
}
bool HTTPTracker::updateData(const TQByteArray & data)
{
//#define DEBUG_PRINT_RESPONSE
#ifdef DEBUG_PRINT_RESPONSE
Out() << "Data : " << endl;
Out() << TQString(data) << endl;
#endif
// search for dictionary, there might be random garbage infront of the data
Uint32 i = 0;
while (i < data.size())
{
if (data[i] == 'd')
break;
i++;
}
if (i == data.size())
{
failures++;
requestFailed(i18n("Invalid response from tracker"));
return false;
}
BDecoder dec(data,false,i);
BNode* n = 0;
try
{
n = dec.decode();
}
catch (...)
{
failures++;
requestFailed(i18n("Invalid data from tracker"));
return false;
}
if (!n || n->getType() != BNode::DICT)
{
failures++;
requestFailed(i18n("Invalid response from tracker"));
return false;
}
BDictNode* dict = (BDictNode*)n;
if (dict->getData("failure reason"))
{
BValueNode* vn = dict->getValue("failure reason");
TQString msg = vn->data().toString();
delete n;
failures++;
requestFailed(msg);
return false;
}
BValueNode* vn = dict->getValue("interval");
// if no interval is specified, use 5 minutes
if (vn)
interval = vn->data().toInt();
else
interval = 5 * 60;
vn = dict->getValue("incomplete");
if (vn)
leechers = vn->data().toInt();
vn = dict->getValue("complete");
if (vn)
seeders = vn->data().toInt();
BListNode* ln = dict->getList("peers");
if (!ln)
{
// no list, it might however be a compact response
vn = dict->getValue("peers");
if (!vn)
{
delete n;
failures++;
requestFailed(i18n("Invalid response from tracker"));
return false;
}
TQByteArray arr = vn->data().toByteArray();
for (Uint32 i = 0;i < arr.size();i+=6)
{
Uint8 buf[6];
for (int j = 0;j < 6;j++)
buf[j] = arr[i + j];
addPeer(TQHostAddress(ReadUint32(buf,0)).toString(),ReadUint16(buf,4));
}
}
else
{
for (Uint32 i = 0;i < ln->getNumChildren();i++)
{
BDictNode* dict = dynamic_cast<BDictNode*>(ln->getChild(i));
if (!dict)
continue;
BValueNode* ip_node = dict->getValue("ip");
BValueNode* port_node = dict->getValue("port");
if (!ip_node || !port_node)
continue;
addPeer(ip_node->data().toString(),port_node->data().toInt());
}
}
delete n;
return true;
}
void HTTPTracker::onAnnounceResult(KIO::Job* j)
{
if (j->error())
{
KIO::StoredTransferJob* st = (KIO::StoredTransferJob*)j;
KURL u = st->url();
active_job = 0;
Out(SYS_TRK|LOG_IMPORTANT) << "Error : " << st->errorString() << endl;
if (u.queryItem("event") != "stopped")
{
failures++;
requestFailed(j->errorString());
}
else
{
stopDone();
}
}
else
{
KIO::StoredTransferJob* st = (KIO::StoredTransferJob*)j;
KURL u = st->url();
active_job = 0;
if (u.queryItem("event") != "stopped")
{
try
{
if (updateData(st->data()))
{
failures = 0;
peersReady(this);
requestOK();
if (u.queryItem("event") == "started")
started = true;
}
}
catch (bt::Error & err)
{
failures++;
requestFailed(i18n("Invalid response from tracker"));
}
event = TQString();
}
else
{
failures = 0;
stopDone();
}
}
doAnnounceQueue();
}
void HTTPTracker::emitInvalidURLFailure()
{
failures++;
requestFailed(i18n("Invalid tracker URL"));
}
void HTTPTracker::setupMetaData(KIO::MetaData & md)
{
md["UserAgent"] = "ktorrent/" VERSION;
md["SendLanguageSettings"] = "false";
md["Cookies"] = "none";
// md["accept"] = "text/plain";
md["accept"] = "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2";
if (Settings::doNotUseKDEProxy())
{
// set the proxy if the doNotUseKDEProxy ix enabled (URL must be valid to)
KURL url = KURL::fromPathOrURL(Settings::httpTrackerProxy());
if (url.isValid())
md["UseProxy"] = url.pathOrURL();
else
md["UseProxy"] = TQString();
}
}
void HTTPTracker::doAnnounceQueue()
{
if (announce_queue.empty())
return;
KURL u = announce_queue.front();
announce_queue.pop_front();
doAnnounce(u);
}
void HTTPTracker::doAnnounce(const KURL & u)
{
Out(SYS_TRK|LOG_NOTICE) << "Doing tracker request to url : " << u.prettyURL() << endl;
KIO::MetaData md;
setupMetaData(md);
KIO::StoredTransferJob* j = KIO::storedGet(u,false,false);
// set the meta data
j->setMetaData(md);
KIO::Scheduler::scheduleJob(j);
connect(j,TQT_SIGNAL(result(KIO::Job* )),this,TQT_SLOT(onAnnounceResult( KIO::Job* )));
active_job = j;
requestPending();
}
}
#include "httptracker.moc"
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