qBittorrent/src/bittorrent.cpp

/*
 * Bittorrent Client using Qt4 and libtorrent.
 * Copyright (C) 2006  Christophe Dumez
 *
 * 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.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * Contact : chris@qbittorrent.org
 */

#include <QDir>
#include <QDateTime>
#include <QString>
#include <QTimer>
#include <QSettings>
#include <stdlib.h>

#include "filesystemwatcher.h"
#include "bittorrent.h"
#include "misc.h"
#include "downloadthread.h"
#include "filterparserthread.h"
#include "preferences.h"
#include "geoip.h"
#include "torrentpersistentdata.h"
#include "httpserver.h"
#include <libtorrent/extensions/ut_metadata.hpp>
#ifdef LIBTORRENT_0_15
#include <libtorrent/extensions/lt_trackers.hpp>
#endif
#include <libtorrent/extensions/ut_pex.hpp>
#include <libtorrent/extensions/smart_ban.hpp>
//#include <libtorrent/extensions/metadata_transfer.hpp>
#include <libtorrent/entry.hpp>
#include <libtorrent/bencode.hpp>
#include <libtorrent/identify_client.hpp>
#include <libtorrent/alert_types.hpp>
#include <libtorrent/torrent_info.hpp>
#include <boost/filesystem/exception.hpp>

#define MAX_TRACKER_ERRORS 2
#define MAX_RATIO 100.
enum ProxyType {HTTP=1, SOCKS5=2, HTTP_PW=3, SOCKS5_PW=4};

// Main constructor
Bittorrent::Bittorrent() : preAllocateAll(false), addInPause(false), ratio_limit(-1), UPnPEnabled(false), NATPMPEnabled(false), LSDEnabled(false), DHTEnabled(false), queueingEnabled(false), geoipDBLoaded(false), exiting(false) {
  resolve_countries = false;
  // To avoid some exceptions
  fs::path::default_name_check(fs::no_check);
  // Creating Bittorrent session
  // Check if we should spoof utorrent
  if(Preferences::isUtorrentSpoofingEnabled()) {
    s = new session(fingerprint("UT", 1, 8, 5, 0), 0);
    qDebug("Peer ID: %s", fingerprint("UT", 1, 8, 5, 0).to_string().c_str());
  } else {
    s = new session(fingerprint("qB", VERSION_MAJOR, VERSION_MINOR, VERSION_BUGFIX, 0), 0);
    qDebug("Peer ID: %s", fingerprint("qB", VERSION_MAJOR, VERSION_MINOR, VERSION_BUGFIX, 0).to_string().c_str());
  }

  // Set severity level of libtorrent session
  //s->set_alert_mask(alert::all_categories & ~alert::progress_notification);
  s->set_alert_mask(alert::error_notification | alert::peer_notification | alert::port_mapping_notification | alert::storage_notification | alert::tracker_notification | alert::status_notification | alert::ip_block_notification);
  // Load previous state
  loadSessionState();
  // Enabling plugins
  //s->add_extension(&create_metadata_plugin);
  s->add_extension(&create_ut_metadata_plugin);
#ifdef LIBTORRENT_0_15
  s->add_extension(create_lt_trackers_plugin);
#endif
  if(Preferences::isPeXEnabled()) {
    PeXEnabled = true;
    s->add_extension(&create_ut_pex_plugin);
  } else {
    PeXEnabled = false;
  }
  s->add_extension(&create_smart_ban_plugin);
  timerAlerts = new QTimer();
  connect(timerAlerts, SIGNAL(timeout()), this, SLOT(readAlerts()));
  timerAlerts->start(3000);
  // To download from urls
  downloader = new downloadThread(this);
  connect(downloader, SIGNAL(downloadFinished(QString, QString)), this, SLOT(processDownloadedFile(QString, QString)));
  connect(downloader, SIGNAL(downloadFailure(QString, QString)), this, SLOT(handleDownloadFailure(QString, QString)));
  appendLabelToSavePath = Preferences::appendTorrentLabel();
#ifdef LIBTORRENT_0_15
  appendqBExtension = Preferences::useIncompleteFilesExtension();
#endif
  // Apply user settings to Bittorrent session
  configureSession();
  qDebug("* BTSession constructed");
}

session_proxy Bittorrent::asyncDeletion() {
  qDebug("Bittorrent session async deletion IN");
  exiting = true;
  // Do some BT related saving
  saveDHTEntry();
  saveSessionState();
  saveFastResumeData();
  // Delete session
  session_proxy sp = s->abort();
  delete s;
  qDebug("Bittorrent session async deletion OUT");
  return sp;
}

// Main destructor
Bittorrent::~Bittorrent() {
  qDebug("BTSession destructor IN");
  if(!exiting) {
    // Do some BT related saving
    saveDHTEntry();
    saveSessionState();
    saveFastResumeData();
    // Delete session
    session_proxy sp = s->abort();
    delete s;
  }
  // Disable directory scanning
  disableDirectoryScanning();
  // Delete our objects
  delete timerAlerts;
  if(BigRatioTimer)
    delete BigRatioTimer;
  if(filterParser)
    delete filterParser;
  delete downloader;
  if(FSWatcher) {
    delete FSWatcher;
  }
  // HTTP Server
  if(httpServer)
    delete httpServer;
  if(timerETA)
    delete timerETA;
  qDebug("BTSession destructor OUT");
}

void Bittorrent::preAllocateAllFiles(bool b) {
  bool change = (preAllocateAll != b);
  if(change) {
    qDebug("PreAllocateAll changed, reloading all torrents!");
    preAllocateAll = b;
  }
}

void Bittorrent::deleteBigRatios() {
  if(ratio_limit == -1) return;
  std::vector<torrent_handle> torrents = getTorrents();
  std::vector<torrent_handle>::iterator torrentIT;
  for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
    QTorrentHandle h = QTorrentHandle(*torrentIT);
    if(!h.is_valid()) continue;
    if(h.is_seed()) {
      QString hash = h.hash();
      float ratio = getRealRatio(hash);
      if(ratio <= MAX_RATIO && ratio > ratio_limit) {
        QString fileName = h.name();
        addConsoleMessage(tr("%1 reached the maximum ratio you set.").arg(fileName));
        deleteTorrent(hash);
        //emit torrent_ratio_deleted(fileName);
      }
    }
  }
}

void Bittorrent::setDownloadLimit(QString hash, long val) {
  QTorrentHandle h = getTorrentHandle(hash);
  if(h.is_valid()) {
    h.set_download_limit(val);
  }
}

bool Bittorrent::isQueueingEnabled() const {
  return queueingEnabled;
}

void Bittorrent::setUploadLimit(QString hash, long val) {
  qDebug("Set upload limit rate to %ld", val);
  QTorrentHandle h = getTorrentHandle(hash);
  if(h.is_valid()) {
    h.set_upload_limit(val);
  }
}

void Bittorrent::handleDownloadFailure(QString url, QString reason) {
  emit downloadFromUrlFailure(url, reason);
  // Clean up
  QUrl qurl = QUrl::fromEncoded(url.toLocal8Bit());
  int index = url_skippingDlg.indexOf(qurl);
  if(index >= 0)
    url_skippingDlg.removeAt(index);
  if(savepath_fromurl.contains(qurl))
    savepath_fromurl.remove(qurl);
}

void Bittorrent::startTorrentsInPause(bool b) {
  addInPause = b;
}

void Bittorrent::setQueueingEnabled(bool enable) {
  if(queueingEnabled != enable) {
    qDebug("Queueing system is changing state...");
    queueingEnabled = enable;
  }
}

// Set BT session configuration
void Bittorrent::configureSession() {
  qDebug("Configuring session");
  // Downloads
  // * Save path
  defaultSavePath = Preferences::getSavePath();
  if(Preferences::isTempPathEnabled()) {
    setDefaultTempPath(Preferences::getTempPath());
  } else {
    setDefaultTempPath(QString::null);
  }
  setAppendLabelToSavePath(Preferences::appendTorrentLabel());
#ifdef LIBTORRENT_0_15
  setAppendqBExtension(Preferences::useIncompleteFilesExtension());
#endif
  preAllocateAllFiles(Preferences::preAllocateAllFiles());
  startTorrentsInPause(Preferences::addTorrentsInPause());
  // * Scan dir
  QString scan_dir = Preferences::getScanDir();
  if(scan_dir.isEmpty()) {
    disableDirectoryScanning();
  }else{
    //Interval first
    enableDirectoryScanning(scan_dir);
  }
  // Connection
  // * Ports binding
  unsigned short old_listenPort = getListenPort();
  setListeningPort(Preferences::getSessionPort());
  unsigned short new_listenPort = getListenPort();
  if(new_listenPort != old_listenPort) {
    addConsoleMessage(tr("qBittorrent is bound to port: TCP/%1", "e.g: qBittorrent is bound to port: 6881").arg( misc::toQString(new_listenPort)));
  }
  // * Global download limit
  int down_limit = Preferences::getGlobalDownloadLimit();
  if(down_limit <= 0) {
    // Download limit disabled
    setDownloadRateLimit(-1);
  } else {
    // Enabled
    setDownloadRateLimit(down_limit*1024);
  }
  int up_limit = Preferences::getGlobalUploadLimit();
  // * Global Upload limit
  if(up_limit <= 0) {
    // Upload limit disabled
    setUploadRateLimit(-1);
  } else {
    // Enabled
    setUploadRateLimit(up_limit*1024);
  }
  // Resolve countries
  qDebug("Loading country resolution settings");
  bool new_resolv_countries = Preferences::resolvePeerCountries();
  if(resolve_countries != new_resolv_countries) {
    qDebug("in country reoslution settings");
    resolve_countries = new_resolv_countries;
    if(resolve_countries && !geoipDBLoaded) {
      qDebug("Loading geoip database");
      GeoIP::loadDatabase(s);
      geoipDBLoaded = true;
    }
    // Update torrent handles
    std::vector<torrent_handle> torrents = getTorrents();
    std::vector<torrent_handle>::iterator torrentIT;
    for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
      QTorrentHandle h = QTorrentHandle(*torrentIT);
      if(h.is_valid())
        h.resolve_countries(resolve_countries);
    }
  }
  // * UPnP
  if(Preferences::isUPnPEnabled()) {
    enableUPnP(true);
    addConsoleMessage(tr("UPnP support [ON]"), QString::fromUtf8("blue"));
  } else {
    enableUPnP(false);
    addConsoleMessage(tr("UPnP support [OFF]"), QString::fromUtf8("blue"));
  }
  // * NAT-PMP
  if(Preferences::isNATPMPEnabled()) {
    enableNATPMP(true);
    addConsoleMessage(tr("NAT-PMP support [ON]"), QString::fromUtf8("blue"));
  } else {
    enableNATPMP(false);
    addConsoleMessage(tr("NAT-PMP support [OFF]"), QString::fromUtf8("blue"));
  }
  // * Session settings
  session_settings sessionSettings;
  if(Preferences::isUtorrentSpoofingEnabled()) {
    sessionSettings.user_agent = "uTorrent/1850(17414)";
  } else {
    sessionSettings.user_agent = "qBittorrent "VERSION;
  }
  sessionSettings.upnp_ignore_nonrouters = true;
  sessionSettings.use_dht_as_fallback = false;
  // To prevent ISPs from blocking seeding
  sessionSettings.lazy_bitfields = true;
  // Speed up exit
  sessionSettings.stop_tracker_timeout = 1;
  //sessionSettings.announce_to_all_trackers = true;
  sessionSettings.auto_scrape_interval = 1200; // 20 minutes
#ifdef LIBTORRENT_0_15
  sessionSettings.announce_to_all_tiers = true; //uTorrent behavior
  sessionSettings.auto_scrape_min_interval = 900; // 15 minutes
#endif
  // To keep same behavior as in qBittorrent v1.2.0
  sessionSettings.rate_limit_ip_overhead = false;
  sessionSettings.cache_size = Preferences::diskCacheSize()*64;
  addConsoleMessage(tr("Using a disk cache size of %1 MiB").arg(Preferences::diskCacheSize()));
  // Queueing System
  if(Preferences::isQueueingSystemEnabled()) {
    sessionSettings.active_downloads = Preferences::getMaxActiveDownloads();
    sessionSettings.active_seeds = Preferences::getMaxActiveUploads();
    sessionSettings.active_limit = Preferences::getMaxActiveTorrents();
    sessionSettings.dont_count_slow_torrents = false;
    setQueueingEnabled(true);
  } else {
    sessionSettings.active_downloads = -1;
    sessionSettings.active_seeds = -1;
    sessionSettings.active_limit = -1;
    setQueueingEnabled(false);
  }
  setSessionSettings(sessionSettings);
  // Bittorrent
  // * Max connections limit
  setMaxConnections(Preferences::getMaxConnecs());
  // * Max connections per torrent limit
  setMaxConnectionsPerTorrent(Preferences::getMaxConnecsPerTorrent());
  // * Max uploads per torrent limit
  setMaxUploadsPerTorrent(Preferences::getMaxUploadsPerTorrent());
  // * DHT
  if(Preferences::isDHTEnabled()) {
    // Set DHT Port
    if(enableDHT(true)) {
      int dht_port = new_listenPort;
      if(!Preferences::isDHTPortSameAsBT())
        dht_port = Preferences::getDHTPort();
      setDHTPort(dht_port);
      addConsoleMessage(tr("DHT support [ON], port: UDP/%1").arg(dht_port), QString::fromUtf8("blue"));
    } else {
      addConsoleMessage(tr("DHT support [OFF]"), QString::fromUtf8("red"));
    }
  } else {
    enableDHT(false);
    addConsoleMessage(tr("DHT support [OFF]"), QString::fromUtf8("blue"));
  }
  // * PeX
  if(PeXEnabled) {
    addConsoleMessage(tr("PeX support [ON]"), QString::fromUtf8("blue"));
  } else {
    addConsoleMessage(tr("PeX support [OFF]"), QString::fromUtf8("red"));
  }
  if(PeXEnabled != Preferences::isPeXEnabled()) {
    addConsoleMessage(tr("Restart is required to toggle PeX support"), QString::fromUtf8("red"));
  }
  // * LSD
  if(Preferences::isLSDEnabled()) {
    enableLSD(true);
    addConsoleMessage(tr("Local Peer Discovery [ON]"), QString::fromUtf8("blue"));
  } else {
    enableLSD(false);
    addConsoleMessage(tr("Local Peer Discovery support [OFF]"), QString::fromUtf8("blue"));
  }
  // * Encryption
  int encryptionState = Preferences::getEncryptionSetting();
  // The most secure, rc4 only so that all streams and encrypted
  pe_settings encryptionSettings;
  encryptionSettings.allowed_enc_level = pe_settings::rc4;
  encryptionSettings.prefer_rc4 = true;
  switch(encryptionState) {
  case 0: //Enabled
    encryptionSettings.out_enc_policy = pe_settings::enabled;
    encryptionSettings.in_enc_policy = pe_settings::enabled;
    addConsoleMessage(tr("Encryption support [ON]"), QString::fromUtf8("blue"));
    break;
  case 1: // Forced
    encryptionSettings.out_enc_policy = pe_settings::forced;
    encryptionSettings.in_enc_policy = pe_settings::forced;
    addConsoleMessage(tr("Encryption support [FORCED]"), QString::fromUtf8("blue"));
    break;
  default: // Disabled
    encryptionSettings.out_enc_policy = pe_settings::disabled;
    encryptionSettings.in_enc_policy = pe_settings::disabled;
    addConsoleMessage(tr("Encryption support [OFF]"), QString::fromUtf8("blue"));
  }
  applyEncryptionSettings(encryptionSettings);
  // * Desired ratio
  setGlobalRatio(Preferences::getDesiredRatio());
  // * Maximum ratio
  setDeleteRatio(Preferences::getDeleteRatio());
  // Ip Filter
  FilterParserThread::processFilterList(s, Preferences::bannedIPs());
  if(Preferences::isFilteringEnabled()) {
    enableIPFilter(Preferences::getFilter());
  }else{
    disableIPFilter();
  }
  // Update Web UI
  if (Preferences::isWebUiEnabled()) {
    quint16 port = Preferences::getWebUiPort();
    QString username = Preferences::getWebUiUsername();
    QString password = Preferences::getWebUiPassword();
    initWebUi(username, password, port);
  } else if(httpServer) {
    delete httpServer;
  }
  // * Proxy settings
  proxy_settings proxySettings;
  if(Preferences::isProxyEnabled()) {
    qDebug("Enabling P2P proxy");
    proxySettings.hostname = Preferences::getProxyIp().toStdString();
    qDebug("hostname is %s", proxySettings.hostname.c_str());
    proxySettings.port = Preferences::getProxyPort();
    qDebug("port is %d", proxySettings.port);
    if(Preferences::isProxyAuthEnabled()) {
      proxySettings.username = Preferences::getProxyUsername().toStdString();
      proxySettings.password = Preferences::getProxyPassword().toStdString();
      qDebug("username is %s", proxySettings.username.c_str());
      qDebug("password is %s", proxySettings.password.c_str());
    }
    switch(Preferences::getProxyType()) {
    case HTTP:
      qDebug("type: http");
      proxySettings.type = proxy_settings::http;
      break;
    case HTTP_PW:
      qDebug("type: http_pw");
      proxySettings.type = proxy_settings::http_pw;
      break;
    case SOCKS5:
      qDebug("type: socks5");
      proxySettings.type = proxy_settings::socks5;
      break;
    default:
      qDebug("type: socks5_pw");
      proxySettings.type = proxy_settings::socks5_pw;
      break;
    }
    setProxySettings(proxySettings, Preferences::useProxyForTrackers(), Preferences::useProxyForPeers(), Preferences::useProxyForWebseeds(), Preferences::useProxyForDHT());
  } else {
    qDebug("Disabling P2P proxy");
    setProxySettings(proxySettings, false, false, false, false);
  }
  if(Preferences::isHTTPProxyEnabled()) {
    qDebug("Enabling Search HTTP proxy");
    // HTTP Proxy
    QString proxy_str;
    switch(Preferences::getHTTPProxyType()) {
    case HTTP_PW:
      proxy_str = "http://"+Preferences::getHTTPProxyUsername()+":"+Preferences::getHTTPProxyPassword()+"@"+Preferences::getHTTPProxyIp()+":"+QString::number(Preferences::getHTTPProxyPort());
      break;
    default:
      proxy_str = "http://"+Preferences::getHTTPProxyIp()+":"+QString::number(Preferences::getHTTPProxyPort());
    }
    // We need this for urllib in search engine plugins
#ifdef Q_WS_WIN
    char proxystr[512];
    snprintf(proxystr, 512, "http_proxy=%s", proxy_str.toLocal8Bit().data());
    putenv(proxystr);
#else
    qDebug("HTTP: proxy string: %s", proxy_str.toLocal8Bit().data());
    setenv("http_proxy", proxy_str.toLocal8Bit().data(), 1);
#endif
  } else {
    qDebug("Disabling search proxy");
#ifdef Q_WS_WIN
    putenv("http_proxy=");
#else
    unsetenv("http_proxy");
#endif
  }
  qDebug("Session configured");
}

bool Bittorrent::initWebUi(QString username, QString password, int port) {
  if(httpServer)
    httpServer->close();
  else
    httpServer = new HttpServer(this, 3000, this);
  httpServer->setAuthorization(username, password);
  bool success = httpServer->listen(QHostAddress::Any, port);
  if (success)
    qDebug("Web UI listening on port %d", port);
  else
    addConsoleMessage(tr("Web User Interface Error - Unable to bind Web UI to port %1").arg(port), QColor("red"));
  return success;
}

void Bittorrent::takeETASamples() {
  bool change = false;;
  foreach(const QString &hash, ETA_samples.keys()) {
    QTorrentHandle h = getTorrentHandle(hash);
    if(h.is_valid() && !h.is_paused() && !h.is_seed()) {
      QList<int> samples = ETA_samples.value(h.hash(), QList<int>());
      if(samples.size() >= MAX_SAMPLES)
        samples.removeFirst();
      samples.append(h.download_payload_rate());
      ETA_samples[h.hash()] = samples;
      change = true;
    } else {
      ETA_samples.remove(hash);
    }
  }
  if(!change && timerETA) {
    delete timerETA;
  }
}

// This algorithm was inspired from KTorrent - http://www.ktorrent.org
// Calculate the ETA using a combination of several algorithms:
// GASA: Global Average Speed Algorithm
// CSA: Current Speed Algorithm
// WINX: Window of X Algorithm
qlonglong Bittorrent::getETA(QString hash) {
  QTorrentHandle h = getTorrentHandle(hash);
  if(!h.is_valid() || h.state() != torrent_status::downloading || !h.active_time())
    return -1;
  // See if the torrent is going to be completed soon
  qulonglong bytes_left = h.actual_size() - h.total_wanted_done();
  if(h.actual_size() > 10485760L) { // Size > 10MiB
    if(h.progress() >= (float)0.99 && bytes_left < 10485760L) { // Progress>99% but less than 10MB left.
      // Compute by taking samples
      if(!ETA_samples.contains(h.hash())) {
        ETA_samples[h.hash()] = QList<int>();
      }
      if(!timerETA) {
        timerETA = new QTimer(this);
        connect(timerETA, SIGNAL(timeout()), this, SLOT(takeETASamples()));
        timerETA->start();
      } else {
        QList<int> samples = ETA_samples.value(h.hash(), QList<int>());
        int nb_samples = samples.size();
        if(nb_samples > 3) {
          long sum_samples = 0;
          foreach(int val, samples) {
            sum_samples += val;
          }
          // Use WINX
          return (qlonglong)(((double)bytes_left) / (((double)sum_samples) / ((double)nb_samples)));
        }
      }
    }
  }
  // Normal case: Use GASA
  double avg_speed = (double)h.all_time_download() / h.active_time();
  return (qlonglong) floor((double) (bytes_left) / avg_speed);
}

std::vector<torrent_handle> Bittorrent::getTorrents() const {
  return s->get_torrents();
}

// Return the torrent handle, given its hash
QTorrentHandle Bittorrent::getTorrentHandle(QString hash) const{
  return QTorrentHandle(s->find_torrent(misc::fromString<sha1_hash>((hash.toStdString()))));
}

bool Bittorrent::hasActiveTorrents() const {
  std::vector<torrent_handle> torrents = getTorrents();
  std::vector<torrent_handle>::iterator torrentIT;
  for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
    QTorrentHandle h = QTorrentHandle(*torrentIT);
    if(h.is_valid() && !h.is_paused() && !h.is_queued())
      return true;
  }
  return false;
}

void Bittorrent::banIP(QString ip) {
  FilterParserThread::processFilterList(s, QStringList(ip));
  Preferences::banIP(ip);
}

// Delete a torrent from the session, given its hash
// permanent = true means that the torrent will be removed from the hard-drive too
void Bittorrent::deleteTorrent(QString hash, bool delete_local_files) {
  qDebug("Deleting torrent with hash: %s", hash.toLocal8Bit().data());
  QTorrentHandle h = getTorrentHandle(hash);
  if(!h.is_valid()) {
    qDebug("/!\\ Error: Invalid handle");
    return;
  }
  QString savePath = h.save_path();
  QString fileName = h.name();
  // Remove it from session
  if(delete_local_files)
    s->remove_torrent(h.get_torrent_handle(), session::delete_files);
  else
    s->remove_torrent(h.get_torrent_handle());
  // Remove it from torrent backup directory
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  QStringList filters;
  filters << hash+".*";
  QStringList files = torrentBackup.entryList(filters, QDir::Files, QDir::Unsorted);
  foreach(const QString &file, files) {
    torrentBackup.remove(file);
  }
  TorrentPersistentData::deletePersistentData(hash);
  // Remove tracker errors
  trackersInfos.remove(hash);
  if(delete_local_files)
    addConsoleMessage(tr("'%1' was removed from transfer list and hard disk.", "'xxx.avi' was removed...").arg(fileName));
  else
    addConsoleMessage(tr("'%1' was removed from transfer list.", "'xxx.avi' was removed...").arg(fileName));
  emit deletedTorrent(hash);
}

void Bittorrent::pauseAllTorrents() {
  std::vector<torrent_handle> torrents = getTorrents();
  std::vector<torrent_handle>::iterator torrentIT;
  for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
    QTorrentHandle h = QTorrentHandle(*torrentIT);
    if(!h.is_valid()) continue;
    if(!h.is_paused()) {
      h.pause();
      emit pausedTorrent(h);
    }
  }
}

void Bittorrent::resumeAllTorrents() {
  std::vector<torrent_handle> torrents = getTorrents();
  std::vector<torrent_handle>::iterator torrentIT;
  for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
    QTorrentHandle h = QTorrentHandle(*torrentIT);
    if(!h.is_valid()) continue;
    if(h.is_paused()) {
      h.resume();
      emit resumedTorrent(h);
    }
  }
}

void Bittorrent::pauseTorrent(QString hash) {
  QTorrentHandle h = getTorrentHandle(hash);
  if(!h.is_paused()) {
    h.pause();
    emit pausedTorrent(h);
  }
}

void Bittorrent::resumeTorrent(QString hash) {
  QTorrentHandle h = getTorrentHandle(hash);
  if(h.is_paused()) {
    h.resume();
    emit resumedTorrent(h);
  }
}

QTorrentHandle Bittorrent::addMagnetUri(QString magnet_uri, bool resumed) {
  QTorrentHandle h;
  QString hash = misc::magnetUriToHash(magnet_uri);
  if(hash.isEmpty()) {
    addConsoleMessage(tr("'%1' is not a valid magnet URI.").arg(magnet_uri));
    return h;
  }
  if(resumed) {
    qDebug("Resuming magnet URI: %s", hash.toLocal8Bit().data());
  } else {
    qDebug("Adding new magnet URI");
  }

  bool fastResume=false;
  Q_ASSERT(magnet_uri.startsWith("magnet:"));
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  // Checking if BT_backup Dir exists
  // create it if it is not
  if(! torrentBackup.exists()) {
    if(! torrentBackup.mkpath(torrentBackup.path())) {
      std::cerr << "Couldn't create the directory: '" << torrentBackup.path().toLocal8Bit().data() << "'\n";
      exit(1);
    }
  }

  // Check if torrent is already in download list
  if(s->find_torrent(sha1_hash(hash.toLocal8Bit().data())).is_valid()) {
    qDebug("/!\\ Torrent is already in download list");
    // Update info Bar
    addConsoleMessage(tr("'%1' is already in download list.", "e.g: 'xxx.avi' is already in download list.").arg(magnet_uri));
    return h;
  }

  add_torrent_params p;
  //Getting fast resume data if existing
  std::vector<char> buf;
  if(resumed) {
    qDebug("Trying to load fastresume data: %s", (torrentBackup.path()+QDir::separator()+hash+QString(".fastresume")).toLocal8Bit().data());
    if (load_file((torrentBackup.path()+QDir::separator()+hash+QString(".fastresume")).toLocal8Bit().data(), buf) == 0) {
      fastResume = true;
      p.resume_data = &buf;
      qDebug("Successfuly loaded");
    }
  }
  QString savePath = getSavePath(hash);
  qDebug("addMagnetURI: using save_path: %s", savePath.toLocal8Bit().data());
  if(defaultTempPath.isEmpty() || (resumed && TorrentPersistentData::isSeed(hash))) {
    p.save_path = savePath.toLocal8Bit().data();
  } else {
    p.save_path = defaultTempPath.toLocal8Bit().data();
  }
  // Preallocate all?
  if(preAllocateAll)
    p.storage_mode = storage_mode_allocate;
  else
    p.storage_mode = storage_mode_sparse;
  // Start in pause
  p.paused = false;
  p.duplicate_is_error = false; // Already checked
  p.auto_managed = false; // Because it is added in paused state
  // Adding torrent to Bittorrent session
  try {
    h =  QTorrentHandle(add_magnet_uri(*s, magnet_uri.toStdString(), p));
  }catch(std::exception e){
    qDebug("Error: %s", e.what());
  }
  // Check if it worked
  if(!h.is_valid()) {
    // No need to keep on, it failed.
    qDebug("/!\\ Error: Invalid handle");
    return h;
  }
  Q_ASSERT(h.hash() == hash);
  // Connections limit per torrent
  h.set_max_connections(Preferences::getMaxConnecsPerTorrent());
  // Uploads limit per torrent
  h.set_max_uploads(Preferences::getMaxUploadsPerTorrent());
  // Resolve countries
  h.resolve_countries(resolve_countries);
  // Load filtered files
  if(!resumed) {
    // Sequential download
    if(TorrentTempData::hasTempData(hash)) {
      qDebug("addMagnetUri: Setting download as sequential (from tmp data)");
      h.set_sequential_download(TorrentTempData::isSequential(hash));
    }
    // Save persistent data for new torrent
    Q_ASSERT(h.is_valid());
    qDebug("addMagnetUri: hash: %s", h.hash().toLocal8Bit().data());
    TorrentPersistentData::saveTorrentPersistentData(h, true);
    qDebug("Persistent data saved");
    // Save save_path
    if(!defaultTempPath.isEmpty()) {
      qDebug("addMagnetUri: Saving save_path in persistent data: %s", savePath.toLocal8Bit().data());
      TorrentPersistentData::saveSavePath(hash, savePath);
    }
  }
  if(!addInPause && !fastResume) {
    // Start torrent because it was added in paused state
    h.resume();
  }
  // Send torrent addition signal
  if(fastResume)
    addConsoleMessage(tr("'%1' resumed. (fast resume)", "'/home/y/xxx.torrent' was resumed. (fast resume)").arg(magnet_uri));
  else
    addConsoleMessage(tr("'%1' added to download list.", "'/home/y/xxx.torrent' was added to download list.").arg(magnet_uri));
  emit addedTorrent(h);
  return h;
}

// Add a torrent to the Bittorrent session
QTorrentHandle Bittorrent::addTorrent(QString path, bool fromScanDir, QString from_url, bool resumed) {
  QTorrentHandle h;
  bool fastResume=false;
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  QString file, dest_file, hash;
  boost::intrusive_ptr<torrent_info> t;

  // Checking if BT_backup Dir exists
  // create it if it is not
  if(! torrentBackup.exists()) {
    if(! torrentBackup.mkpath(torrentBackup.path())) {
      std::cerr << "Couldn't create the directory: '" << torrentBackup.path().toLocal8Bit().data() << "'\n";
      exit(1);
    }
  }
  // Processing torrents
  file = path.trimmed().replace("file://", "", Qt::CaseInsensitive);
  if(file.isEmpty()) {
    return h;
  }
  Q_ASSERT(!file.startsWith("http://", Qt::CaseInsensitive) && !file.startsWith("https://", Qt::CaseInsensitive) && !file.startsWith("ftp://", Qt::CaseInsensitive));

  qDebug("Adding %s to download list", file.toLocal8Bit().data());
  try {
    // Getting torrent file informations
    t = new torrent_info(file.toLocal8Bit().data());
  } catch(std::exception&) {
    if(!from_url.isNull()) {
      addConsoleMessage(tr("Unable to decode torrent file: '%1'", "e.g: Unable to decode torrent file: '/home/y/xxx.torrent'").arg(from_url), QString::fromUtf8("red"));
      //emit invalidTorrent(from_url);
      QFile::remove(file);
    }else{
      addConsoleMessage(tr("Unable to decode torrent file: '%1'", "e.g: Unable to decode torrent file: '/home/y/xxx.torrent'").arg(file), QString::fromUtf8("red"));
      //emit invalidTorrent(file);
    }
    addConsoleMessage(tr("This file is either corrupted or this isn't a torrent."),QString::fromUtf8("red"));
    if(fromScanDir) {
      // Remove file
      QFile::remove(file);
    }
    return h;
  }
  qDebug(" -> Hash: %s", misc::toString(t->info_hash()).c_str());
  qDebug(" -> Name: %s", t->name().c_str());
  hash = misc::toQString(t->info_hash());

  // Check if torrent is already in download list
  if(s->find_torrent(t->info_hash()).is_valid()) {
    qDebug("/!\\ Torrent is already in download list");
    // Update info Bar
    if(!fromScanDir) {
      if(!from_url.isNull()) {
        // If download from url, remove temp file
        QFile::remove(file);
        addConsoleMessage(tr("'%1' is already in download list.", "e.g: 'xxx.avi' is already in download list.").arg(from_url));
        //emit duplicateTorrent(from_url);
      }else{
        addConsoleMessage(tr("'%1' is already in download list.", "e.g: 'xxx.avi' is already in download list.").arg(file));
        //emit duplicateTorrent(file);
      }
    }else{
      // Delete torrent from scan dir
      QFile::remove(file);
    }
    return h;
  }
  add_torrent_params p;
  //Getting fast resume data if existing
  std::vector<char> buf;
  if(resumed) {
    qDebug("Trying to load fastresume data: %s", (torrentBackup.path()+QDir::separator()+hash+QString(".fastresume")).toLocal8Bit().data());
    if (load_file((torrentBackup.path()+QDir::separator()+hash+QString(".fastresume")).toLocal8Bit().data(), buf) == 0) {
      fastResume = true;
      p.resume_data = &buf;
      qDebug("Successfuly loaded");
    }
  }
  QString savePath;
  if(!from_url.isEmpty() && savepath_fromurl.contains(QUrl::fromEncoded(from_url.toLocal8Bit()))) {
    // Enforcing the save path defined before URL download (from RSS for example)
    savePath = savepath_fromurl.take(QUrl::fromEncoded(from_url.toLocal8Bit()));
  } else {
    savePath = getSavePath(hash);
  }
  qDebug("addTorrent: using save_path: %s", savePath.toLocal8Bit().data());
  if(defaultTempPath.isEmpty() || (resumed && TorrentPersistentData::isSeed(hash))) {
    p.save_path = savePath.toLocal8Bit().data();
  } else {
    p.save_path = defaultTempPath.toLocal8Bit().data();
  }

#ifdef LIBTORRENT_0_15
  // Skip checking and directly start seeding (new in libtorrent v0.15)
  if(TorrentTempData::isSeedingMode(hash)){
    p.seed_mode=true;
  } else {
    p.seed_mode=false;
  }
#endif
  // TODO: Remove in v1.6.0: For backward compatibility only
  if(QFile::exists(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+hash+".finished")) {
    p.save_path = savePath.toLocal8Bit().data();
    QFile::remove(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+hash+".finished");
  }
  p.ti = t;
  // Preallocate all?
  if(preAllocateAll)
    p.storage_mode = storage_mode_allocate;
  else
    p.storage_mode = storage_mode_sparse;
  // Start in pause
  p.paused = true;
  p.duplicate_is_error = false; // Already checked
  p.auto_managed = false; // Because it is added in paused state
  // Adding torrent to Bittorrent session
  try {
    h =  QTorrentHandle(s->add_torrent(p));
  }catch(std::exception e){
    qDebug("Error: %s", e.what());
  }
  // Check if it worked
  if(!h.is_valid()) {
    // No need to keep on, it failed.
    qDebug("/!\\ Error: Invalid handle");
    // If download from url, remove temp file
    if(!from_url.isNull()) QFile::remove(file);
    return h;
  }

  // Connections limit per torrent
  h.set_max_connections(Preferences::getMaxConnecsPerTorrent());
  // Uploads limit per torrent
  h.set_max_uploads(Preferences::getMaxUploadsPerTorrent());
  // Resolve countries
  qDebug("AddTorrent: Resolve_countries: %d", (int)resolve_countries);
  h.resolve_countries(resolve_countries);
  if(!resumed) {
    // Sequential download
    if(TorrentTempData::hasTempData(hash)) {
      qDebug("addTorrent: Setting download as sequential (from tmp data)");
      h.prioritize_files(TorrentTempData::getFilesPriority(hash));
      h.set_sequential_download(TorrentTempData::isSequential(hash));
    }
    QString label = TorrentTempData::getLabel(hash);
    // Save persistent data for new torrent
    TorrentPersistentData::saveTorrentPersistentData(h);
    // Save Label
    if(!label.isEmpty()) {
      TorrentPersistentData::saveLabel(hash, label);
    }
    // Save save_path
    if(!defaultTempPath.isEmpty()) {
      qDebug("addTorrent: Saving save_path in persistent data: %s", savePath.toLocal8Bit().data());
      TorrentPersistentData::saveSavePath(hash, savePath);
    }
#ifdef LIBTORRENT_0_15
    // Append .!qB to incomplete files
    if(appendqBExtension)
      appendqBextensionToTorrent(h, true);
#endif
  }
  QString newFile = torrentBackup.path() + QDir::separator() + hash + ".torrent";
  if(file != newFile) {
    // Delete file from torrentBackup directory in case it exists because
    // QFile::copy() do not overwrite
    QFile::remove(newFile);
    // Copy it to torrentBackup directory
    QFile::copy(file, newFile);
  }
  if(!addInPause && !fastResume) {
    // Start torrent because it was added in paused state
    h.resume();
  }
  // If download from url, remove temp file
  if(!from_url.isNull()) QFile::remove(file);
  // Delete from scan dir to avoid trying to download it again
  if(fromScanDir) {
    QFile::remove(file);
  }
  // Send torrent addition signal
  if(!from_url.isNull()) {
    if(fastResume)
      addConsoleMessage(tr("'%1' resumed. (fast resume)", "'/home/y/xxx.torrent' was resumed. (fast resume)").arg(from_url));
    else
      addConsoleMessage(tr("'%1' added to download list.", "'/home/y/xxx.torrent' was added to download list.").arg(from_url));
  }else{
    if(fastResume)
      addConsoleMessage(tr("'%1' resumed. (fast resume)", "'/home/y/xxx.torrent' was resumed. (fast resume)").arg(file));
    else
      addConsoleMessage(tr("'%1' added to download list.", "'/home/y/xxx.torrent' was added to download list.").arg(file));
  }
  emit addedTorrent(h);
  return h;
}

// Set the maximum number of opened connections
void Bittorrent::setMaxConnections(int maxConnec) {
  s->set_max_connections(maxConnec);
}

void Bittorrent::setMaxConnectionsPerTorrent(int max) {
  // Apply this to all session torrents
  std::vector<torrent_handle> handles = s->get_torrents();
  unsigned int nbHandles = handles.size();
  for(unsigned int i=0; i<nbHandles; ++i) {
    QTorrentHandle h = handles[i];
    if(!h.is_valid()) {
      qDebug("/!\\ Error: Invalid handle");
      continue;
    }
    h.set_max_connections(max);
  }
}

void Bittorrent::setMaxUploadsPerTorrent(int max) {
  // Apply this to all session torrents
  std::vector<torrent_handle> handles = s->get_torrents();
  unsigned int nbHandles = handles.size();
  for(unsigned int i=0; i<nbHandles; ++i) {
    QTorrentHandle h = handles[i];
    if(!h.is_valid()) {
      qDebug("/!\\ Error: Invalid handle");
      continue;
    }
    h.set_max_uploads(max);
  }
}

// Return DHT state
bool Bittorrent::isDHTEnabled() const{
  return DHTEnabled;
}

bool Bittorrent::isLSDEnabled() const{
  return LSDEnabled;
}

void Bittorrent::enableUPnP(bool b) {
  if(b) {
    if(!UPnPEnabled) {
      qDebug("Enabling UPnP");
      s->start_upnp();
      UPnPEnabled = true;  
    }
  } else {
    if(UPnPEnabled) {
      qDebug("Disabling UPnP");
      s->stop_upnp();
      UPnPEnabled = false;
    }
  }
}

void Bittorrent::enableNATPMP(bool b) {
  if(b) {
    if(!NATPMPEnabled) {
      qDebug("Enabling NAT-PMP");
      s->start_natpmp();
      NATPMPEnabled = true;
    }
  } else {
    if(NATPMPEnabled) {
      qDebug("Disabling NAT-PMP");
      s->stop_natpmp();
      NATPMPEnabled = false;
    }
  }
}

void Bittorrent::enableLSD(bool b) {
  if(b) {
    if(!LSDEnabled) {
      qDebug("Enabling LSD");
      s->start_lsd();
      LSDEnabled = true;
    }
  } else {
    if(LSDEnabled) {
      qDebug("Disabling LSD");
      s->stop_lsd();
      LSDEnabled = false;
    }
  }
}

void Bittorrent::loadSessionState() {
  boost::filesystem::ifstream ses_state_file((misc::qBittorrentPath()+QString::fromUtf8("ses_state")).toLocal8Bit().data()
                                             , std::ios_base::binary);
  ses_state_file.unsetf(std::ios_base::skipws);
  s->load_state(bdecode(
      std::istream_iterator<char>(ses_state_file)
      , std::istream_iterator<char>()));
}

void Bittorrent::saveSessionState() {
  qDebug("Saving session state to disk...");
  entry session_state = s->state();
  boost::filesystem::ofstream out((misc::qBittorrentPath()+QString::fromUtf8("ses_state")).toLocal8Bit().data()
                                  , std::ios_base::binary);
  out.unsetf(std::ios_base::skipws);
  bencode(std::ostream_iterator<char>(out), session_state);
}

// Enable DHT
bool Bittorrent::enableDHT(bool b) {
  if(b) {
    if(!DHTEnabled) {
      entry dht_state;
      QString dht_state_path = misc::qBittorrentPath()+QString::fromUtf8("dht_state");
      if(QFile::exists(dht_state_path)) {
        boost::filesystem::ifstream dht_state_file(dht_state_path.toLocal8Bit().data(), std::ios_base::binary);
        dht_state_file.unsetf(std::ios_base::skipws);
        try{
          dht_state = bdecode(std::istream_iterator<char>(dht_state_file), std::istream_iterator<char>());
        }catch (std::exception&) {}
      }
      try {
        s->start_dht(dht_state);
        s->add_dht_router(std::make_pair(std::string("router.bittorrent.com"), 6881));
        s->add_dht_router(std::make_pair(std::string("router.utorrent.com"), 6881));
        s->add_dht_router(std::make_pair(std::string("router.bitcomet.com"), 6881));
        DHTEnabled = true;
        qDebug("DHT enabled");
      }catch(std::exception e) {
        qDebug("Could not enable DHT, reason: %s", e.what());
        return false;
      }
    }
  } else {
    if(DHTEnabled) {
      DHTEnabled = false;
      s->stop_dht();
      qDebug("DHT disabled");
    }
  }
  return true;
}

float Bittorrent::getRealRatio(QString hash) const{
  QTorrentHandle h = getTorrentHandle(hash);
  Q_ASSERT(h.all_time_download() >= 0);
  Q_ASSERT(h.all_time_upload() >= 0);
  if(h.all_time_download() == 0) {
    if(h.all_time_upload() == 0)
      return 0;
    return 101;
  }
  float ratio = (float)h.all_time_upload()/(float)h.all_time_download();
  Q_ASSERT(ratio >= 0.);
  if(ratio > 100.)
    ratio = 100.;
  return ratio;
}

// Only save fast resume data for unfinished and unpaused torrents (Optimization)
// Called periodically and on exit
void Bittorrent::saveFastResumeData() {
  // Stop listening for alerts
  timerAlerts->stop();
  int num_resume_data = 0;
  // Pause session
  s->pause();
  std::vector<torrent_handle> torrents =  s->get_torrents();
  std::vector<torrent_handle>::iterator torrentIT;
  for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
    QTorrentHandle h = QTorrentHandle(*torrentIT);
    if(!h.is_valid() || !h.has_metadata()) continue;
    if(isQueueingEnabled())
      TorrentPersistentData::savePriority(h);
    // Actually with should save fast resume data for paused files too
    //if(h.is_paused()) continue;
    if(h.state() == torrent_status::checking_files || h.state() == torrent_status::queued_for_checking) continue;
    h.save_resume_data();
    ++num_resume_data;
  }
  while (num_resume_data > 0) {
    alert const* a = s->wait_for_alert(seconds(30));
    if (a == 0) {
      std::cerr << " aborting with " << num_resume_data << " outstanding "
          "torrents to save resume data for" << std::endl;
      break;
    }
    // Saving fastresume data can fail
    save_resume_data_failed_alert const* rda = dynamic_cast<save_resume_data_failed_alert const*>(a);
    if (rda) {
      --num_resume_data;
      s->pop_alert();
      try {
        // Remove torrent from session
        s->remove_torrent(rda->handle);
      }catch(libtorrent::libtorrent_exception){}
      continue;
    }
    save_resume_data_alert const* rd = dynamic_cast<save_resume_data_alert const*>(a);
    if (!rd) {
      s->pop_alert();
      continue;
    }
    // Saving fast resume data was successful
    --num_resume_data;
    if (!rd->resume_data) continue;
    QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
    QTorrentHandle h(rd->handle);
    if(!h.is_valid()) continue;
    // Remove old fastresume file if it exists
    QFile::remove(torrentBackup.path()+QDir::separator()+ h.hash() + ".fastresume");
    QString file = h.hash()+".fastresume";
    boost::filesystem::ofstream out(fs::path(torrentBackup.path().toLocal8Bit().data()) / file.toLocal8Bit().data(), std::ios_base::binary);
    out.unsetf(std::ios_base::skipws);
    bencode(std::ostream_iterator<char>(out), *rd->resume_data);
    // Remove torrent from session
    s->remove_torrent(rd->handle);
    s->pop_alert();
  }
}

QStringList Bittorrent::getConsoleMessages() const {
  return consoleMessages;
}

QStringList Bittorrent::getPeerBanMessages() const {
  return peerBanMessages;
}

void Bittorrent::addConsoleMessage(QString msg, QColor color) {
  if(consoleMessages.size() > 100) {
    consoleMessages.removeFirst();
  }
  consoleMessages.append(QString::fromUtf8("<font color='grey'>")+ QDateTime::currentDateTime().toString(QString::fromUtf8("dd/MM/yyyy hh:mm:ss")) + QString::fromUtf8("</font> - <font color='") + color.name() +QString::fromUtf8("'><i>") + msg + QString::fromUtf8("</i></font>"));
}

void Bittorrent::addPeerBanMessage(QString ip, bool from_ipfilter) {
  if(peerBanMessages.size() > 100) {
    peerBanMessages.removeFirst();
  }
  if(from_ipfilter)
    peerBanMessages.append(QString::fromUtf8("<font color='grey'>")+ QDateTime::currentDateTime().toString(QString::fromUtf8("dd/MM/yyyy hh:mm:ss")) + QString::fromUtf8("</font> - ")+tr("<font color='red'>%1</font> <i>was blocked due to your IP filter</i>", "x.y.z.w was blocked").arg(ip));
  else
    peerBanMessages.append(QString::fromUtf8("<font color='grey'>")+ QDateTime::currentDateTime().toString(QString::fromUtf8("dd/MM/yyyy hh:mm:ss")) + QString::fromUtf8("</font> - ")+tr("<font color='red'>%1</font> <i>was banned due to corrupt pieces</i>", "x.y.z.w was banned").arg(ip));
}

bool Bittorrent::isFilePreviewPossible(QString hash) const{
  // See if there are supported files in the torrent
  QTorrentHandle h = getTorrentHandle(hash);
  if(!h.is_valid()) {
    qDebug("/!\\ Error: Invalid handle");
    return false;
  }
  unsigned int nbFiles = h.num_files();
  for(unsigned int i=0; i<nbFiles; ++i) {
    QString fileName = h.file_at(i);
    QString extension = fileName.split('.').last();
    if(misc::isPreviewable(extension))
      return true;
  }
  return false;
}

void Bittorrent::addTorrentsFromScanFolder(QStringList &pathList) {
  QString dir_path = FSWatcher->directories().first();
  foreach(const QString &file, pathList) {
    QString fullPath = dir_path+QDir::separator()+file;
    try {
      torrent_info t(fullPath.toLocal8Bit().data());
      addTorrent(fullPath, true);
    } catch(std::exception&) {
      qDebug("Ignoring incomplete torrent file: %s", fullPath.toLocal8Bit().data());
    }
  }
}

QString Bittorrent::getDefaultSavePath() const {
  return defaultSavePath;
}

bool Bittorrent::useTemporaryFolder() const {
  return !defaultTempPath.isEmpty();
}

void Bittorrent::setDefaultTempPath(QString temppath) {
  if(defaultTempPath == temppath)
    return;
  if(temppath.isEmpty()) {
    // Disabling temp dir
    // Moving all torrents to their destination folder
    std::vector<torrent_handle> torrents = getTorrents();
    std::vector<torrent_handle>::iterator torrentIT;
    for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
      QTorrentHandle h = QTorrentHandle(*torrentIT);
      if(!h.is_valid()) continue;
      h.move_storage(getSavePath(h.hash()));
    }
  } else {
    // Moving all downloading torrents to temporary save path
    std::vector<torrent_handle> torrents = getTorrents();
    std::vector<torrent_handle>::iterator torrentIT;
    for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
      QTorrentHandle h = QTorrentHandle(*torrentIT);
      if(!h.is_valid()) continue;
      if(!h.is_seed())
        h.move_storage(temppath);
    }
  }
  defaultTempPath = temppath;
}

#ifdef LIBTORRENT_0_15
void Bittorrent::appendqBextensionToTorrent(QTorrentHandle h, bool append) {
  if(!h.is_valid()) return;
  std::vector<size_type> fp;
  h.file_progress(fp);
  for(int i=0; i<h.num_files(); ++i) {
    if(append) {
      if(fp[i] < 1.) {
        QString name = h.file_at(i);
        if(!name.endsWith(".!qB")) {
          h.rename_file(i, name + ".!qB");
        }
      }
    } else {
      QString name = h.file_at(i);
      if(name.endsWith(".!qB")) {
        name.chop(4);
        h.rename_file(i, name);
      }
    }
  }
}
#endif

void Bittorrent::changeLabelInTorrentSavePath(QTorrentHandle h, QString old_label, QString new_label) {
  if(!h.is_valid()) return;
  if(!appendLabelToSavePath) return;
  QString old_save_path = TorrentPersistentData::getSavePath(h.hash());
  QDir old_dir(old_save_path);
  bool move_storage = (old_dir == QDir(h.save_path()));
  if(!old_label.isEmpty()) {
    Q_ASSERT(old_dir.dirName() == old_label);
    old_dir.cdUp();
  }
  QString new_save_path;
  if(new_label.isEmpty())
    new_save_path = old_dir.absolutePath();
  else
    old_dir.absoluteFilePath(new_label);
  TorrentPersistentData::saveSavePath(h.hash(), new_save_path);
  if(move_storage) {
    // Move storage
      h.move_storage(new_save_path);
  }
}

void Bittorrent::appendLabelToTorrentSavePath(QTorrentHandle h) {
  if(!h.is_valid()) return;
  QString label = TorrentPersistentData::getLabel(h.hash());
  if(label.isEmpty()) return;
  // Current save path
  QString old_save_path = TorrentPersistentData::getSavePath(h.hash());
  QDir old_dir(old_save_path);
  if(old_dir.dirName() != label) {
    QString new_save_path = old_dir.absoluteFilePath(label);
    TorrentPersistentData::saveSavePath(h.hash(), new_save_path);
    if(old_dir == QDir(h.save_path())) {
      // Move storage
      h.move_storage(new_save_path);
    }
  }
}

void Bittorrent::setAppendLabelToSavePath(bool append) {
  if(appendLabelToSavePath != append) {
    appendLabelToSavePath = !appendLabelToSavePath;
    if(appendLabelToSavePath) {
      // Move torrents storage to sub folder with label name
      std::vector<torrent_handle> torrents = getTorrents();
      std::vector<torrent_handle>::iterator torrentIT;
      for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
        QTorrentHandle h = QTorrentHandle(*torrentIT);
        appendLabelToTorrentSavePath(h);
      }
    }
  }
}

#ifdef LIBTORRENT_0_15
void Bittorrent::setAppendqBExtension(bool append) {
  if(appendqBExtension != append) {
    appendqBExtension = !appendqBExtension;
    // append or remove .!qB extension for incomplete files
    std::vector<torrent_handle> torrents = getTorrents();
    std::vector<torrent_handle>::iterator torrentIT;
    for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
      QTorrentHandle h = QTorrentHandle(*torrentIT);
      appendqBextensionToTorrent(h, appendqBExtension);
    }
  }
}
#endif

// Enable directory scanning
void Bittorrent::enableDirectoryScanning(QString scan_dir) {
  if(!scan_dir.isEmpty()) {
    QDir newDir(scan_dir);
    if(!newDir.exists()) {
      qDebug("Scan dir %s does not exist, create it", scan_dir.toUtf8().data());
      newDir.mkpath(scan_dir);
    }
    if(FSWatcher == 0) {
      // Set up folder watching
      FSWatcher = new FileSystemWatcher(this);
      connect(FSWatcher, SIGNAL(torrentsAdded(QStringList&)), this, SLOT(addTorrentsFromScanFolder(QStringList&)));
      FSWatcher->addPath(scan_dir);
    } else {
      QString old_scan_dir = "";
      if(!FSWatcher->directories().empty())
        old_scan_dir = FSWatcher->directories().first();
      if(QDir(old_scan_dir) != QDir(scan_dir)) {
        if(!old_scan_dir.isEmpty())
          FSWatcher->removePath(old_scan_dir);
        FSWatcher->addPath(scan_dir);
      }
    }
  }
}

// Disable directory scanning
void Bittorrent::disableDirectoryScanning() {
  if(FSWatcher) {
    delete FSWatcher;
  }
}

// Set the ports range in which is chosen the port the Bittorrent
// session will listen to
void Bittorrent::setListeningPort(int port) {
  std::pair<int,int> ports(port, port);
  s->listen_on(ports);
}

// Set download rate limit
// -1 to disable
void Bittorrent::setDownloadRateLimit(long rate) {
  qDebug("Setting a global download rate limit at %ld", rate);
  s->set_download_rate_limit(rate);
}

session* Bittorrent::getSession() const{
  return s;
}

// Set upload rate limit
// -1 to disable
void Bittorrent::setUploadRateLimit(long rate) {
  qDebug("set upload_limit to %fkb/s", rate/1024.);
  s->set_upload_rate_limit(rate);
}

// libtorrent allow to adjust ratio for each torrent
// This function will apply to same ratio to all torrents
void Bittorrent::setGlobalRatio(float ratio) {
  if(ratio != -1 && ratio < 1.) ratio = 1.;
  if(ratio == -1) {
    // 0 means unlimited for libtorrent
    ratio = 0;
  }
  std::vector<torrent_handle> handles = s->get_torrents();
  unsigned int nbHandles = handles.size();
  for(unsigned int i=0; i<nbHandles; ++i) {
    QTorrentHandle h = handles[i];
    if(!h.is_valid()) {
      qDebug("/!\\ Error: Invalid handle");
      continue;
    }
    h.set_ratio(ratio);
  }
}

// Torrents will a ratio superior to the given value will
// be automatically deleted
void Bittorrent::setDeleteRatio(float ratio) {
  if(ratio != -1 && ratio < 1.) ratio = 1.;
  if(ratio_limit == -1 && ratio != -1) {
    Q_ASSERT(!BigRatioTimer);
    BigRatioTimer = new QTimer(this);
    connect(BigRatioTimer, SIGNAL(timeout()), this, SLOT(deleteBigRatios()));
    BigRatioTimer->start(5000);
  } else {
    if(ratio_limit != -1 && ratio == -1) {
      delete BigRatioTimer;
    }
  }
  if(ratio_limit != ratio) {
    ratio_limit = ratio;
    qDebug("* Set deleteRatio to %.1f", ratio_limit);
    deleteBigRatios();
  }
}

// Set DHT port (>= 1000 or 0 if same as BT)
void Bittorrent::setDHTPort(int dht_port) {
  if(dht_port == 0 or dht_port >= 1000) {
    struct dht_settings DHTSettings;
    DHTSettings.service_port = dht_port;
    s->set_dht_settings(DHTSettings);
    qDebug("Set DHT Port to %d", dht_port);
  }
}

// Enable IP Filtering
void Bittorrent::enableIPFilter(QString filter) {
  qDebug("Enabling IPFiler");
  if(!filterParser) {
    filterParser = new FilterParserThread(this, s);
  }
  if(filterPath.isEmpty() || filterPath != filter) {
    filterPath = filter;
    filterParser->processFilterFile(filter);
  }
}

// Disable IP Filtering
void Bittorrent::disableIPFilter() {
  qDebug("Disabling IPFilter");
  s->set_ip_filter(ip_filter());
  if(filterParser) {
    delete filterParser;
  }
  filterPath = "";
}

// Set BT session settings (user_agent)
void Bittorrent::setSessionSettings(session_settings sessionSettings) {
  qDebug("Set session settings");
  s->set_settings(sessionSettings);
}

// Set Proxy
void Bittorrent::setProxySettings(proxy_settings proxySettings, bool trackers, bool peers, bool web_seeds, bool dht) {
  qDebug("Set Proxy settings");
  proxy_settings ps_null;
  ps_null.type = proxy_settings::none;
  qDebug("Setting trackers proxy");
  if(trackers)
    s->set_tracker_proxy(proxySettings);
  else
    s->set_tracker_proxy(ps_null);
  qDebug("Setting peers proxy");
  if(peers)
    s->set_peer_proxy(proxySettings);
  else
    s->set_peer_proxy(ps_null);
  qDebug("Setting web seeds proxy");
  if(web_seeds)
    s->set_web_seed_proxy(proxySettings);
  else
    s->set_web_seed_proxy(ps_null);
  if(DHTEnabled) {
    qDebug("Setting DHT proxy, %d", dht);
    if(dht)
      s->set_dht_proxy(proxySettings);
    else
      s->set_dht_proxy(ps_null);
  }
}

// Read alerts sent by the Bittorrent session
void Bittorrent::readAlerts() {
  // look at session alerts and display some infos
  std::auto_ptr<alert> a = s->pop_alert();
  while (a.get()) {
    if (torrent_finished_alert* p = dynamic_cast<torrent_finished_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()) {
        emit finishedTorrent(h);
        QString hash = h.hash();
        // Remember finished state
        TorrentPersistentData::saveSeedStatus(h);
        // Move to download directory if necessary
        if(!defaultTempPath.isEmpty()) {
          // Check if directory is different
          QDir current_dir(h.save_path());
          QDir save_dir(getSavePath(h.hash()));
          if(current_dir != save_dir) {
            h.move_storage(save_dir.path());
          }
        }
        h.save_resume_data();
        // Check if there are torrent files inside
        for(int i=0; i<h.get_torrent_info().num_files(); ++i) {
          QString torrent_relpath = misc::toQString(h.get_torrent_info().file_at(i).path);
          if(torrent_relpath.endsWith(".torrent")) {
            addConsoleMessage(tr("Recursive download of file %1 embedded in torrent %2", "Recursive download of test.torrent embedded in torrent test2").arg(torrent_relpath).arg(h.name()));
            QString torrent_fullpath = h.save_path()+QDir::separator()+torrent_relpath;
            boost::intrusive_ptr<torrent_info> t;
            try {
              t = new torrent_info(torrent_fullpath.toLocal8Bit().data());
              QString sub_hash = misc::toQString(t->info_hash());
              // Passing the save path along to the sub torrent file
              TorrentTempData::setSavePath(sub_hash, h.save_path());
              addTorrent(torrent_fullpath);
            } catch(std::exception&) {
              qDebug("Caught error loading torrent");
              addConsoleMessage(tr("Unable to decode %1 torrent file.").arg(torrent_fullpath), QString::fromUtf8("red"));
            }
          }
        }
        qDebug("Received finished alert for %s", h.name().toLocal8Bit().data());
      }
    }
    else if (save_resume_data_alert* p = dynamic_cast<save_resume_data_alert*>(a.get())) {
      QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
      QTorrentHandle h(p->handle);
      if(h.is_valid()) {
        QString file = h.hash()+".fastresume";
        // Delete old fastresume file if necessary
        if(QFile::exists(file))
          QFile::remove(file);
        qDebug("Saving fastresume data in %s", file.toLocal8Bit().data());
        if (p->resume_data)
        {
          boost::filesystem::ofstream out(fs::path(torrentBackup.path().toLocal8Bit().data()) / file.toLocal8Bit().data(), std::ios_base::binary);
          out.unsetf(std::ios_base::skipws);
          bencode(std::ostream_iterator<char>(out), *p->resume_data);
        }
      }
    }
    else if (metadata_received_alert* p = dynamic_cast<metadata_received_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()) {
        qDebug("Received metadata for %s", h.hash().toLocal8Bit().data());
        emit metadataReceived(h);
        if(h.is_paused()) {
          // XXX: Unfortunately libtorrent-rasterbar does not send a torrent_paused_alert
          // and the torrent can be paused when metadata is received
          emit pausedTorrent(h);
        }
      }
    }
    else if (file_error_alert* p = dynamic_cast<file_error_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()) {
        h.auto_managed(false);
        std::cerr << "File Error: " << p->message().c_str() << std::endl;
        if(h.is_valid()) {
          emit fullDiskError(h, misc::toQString(p->message()));
          h.pause();
          emit pausedTorrent(h);
        }
      }
    }
#ifdef LIBTORRENT_0_15
    else if (file_completed_alert* p = dynamic_cast<file_completed_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(appendqBExtension) {
        QString name = h.file_at(p->index);
        if(name.endsWith(".!qB")) {
          qDebug("File %s finished, removing .!qB extension", name.toLocal8Bit().data());
          name.chop(4);
          h.rename_file(p->index, name);
        }
      }
    }
#endif
    else if (listen_failed_alert* p = dynamic_cast<listen_failed_alert*>(a.get())) {
      // Level: fatal
      int tried_port = p->endpoint.port();
      srand(time(0));
      int fallback_port = tried_port;
      do {
        fallback_port = rand() % 64512 + 1024;
      } while(fallback_port == tried_port);
      addConsoleMessage(tr("Couldn't listen on port %1, using %2 instead.").arg(QString::number(tried_port)).arg(QString::number(fallback_port)), QString::fromUtf8("red"));
      setListeningPort(fallback_port);
      //emit portListeningFailure();
    }
    /*else if (torrent_paused_alert* p = dynamic_cast<torrent_paused_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      qDebug("Received a torrent_paused_alert for %s", h.hash().toLocal8Bit().data());
      if(h.is_valid()) {
        emit torrentPaused(h);
      }
    }*/
    else if (tracker_error_alert* p = dynamic_cast<tracker_error_alert*>(a.get())) {
      // Level: fatal
      QTorrentHandle h(p->handle);
      if(h.is_valid()){
        // Authentication
        if(p->status_code != 401) {
          qDebug("Received a tracker error for %s: %s", p->url.c_str(), p->msg.c_str());
          QString tracker_url = misc::toQString(p->url);
          QHash<QString, TrackerInfos> trackers_data = trackersInfos.value(h.hash(), QHash<QString, TrackerInfos>());
          TrackerInfos data = trackers_data.value(tracker_url, TrackerInfos(tracker_url));
          data.last_message = misc::toQString(p->msg);
#ifndef LIBTORRENT_0_15
          data.verified = false;
          ++data.fail_count;
#endif
          trackers_data.insert(tracker_url, data);
          trackersInfos[h.hash()] = trackers_data;
        } else {
          emit trackerAuthenticationRequired(h);
        }
      }
    }
    else if (tracker_reply_alert* p = dynamic_cast<tracker_reply_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()){
        qDebug("Received a tracker reply from %s", p->url.c_str());
        // Connection was successful now. Remove possible old errors
        QHash<QString, TrackerInfos> trackers_data = trackersInfos.value(h.hash(), QHash<QString, TrackerInfos>());
        QString tracker_url = misc::toQString(p->url);
        TrackerInfos data = trackers_data.value(tracker_url, TrackerInfos(tracker_url));
        data.last_message = ""; // Reset error/warning message
        data.num_peers = p->num_peers;
#ifndef LIBTORRENT_0_15
        data.fail_count = 0;
        data.verified = true;
#endif
        trackers_data.insert(tracker_url, data);
        trackersInfos[h.hash()] = trackers_data;
      }
    } else if (tracker_warning_alert* p = dynamic_cast<tracker_warning_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()){
        // Connection was successful now but there is a warning message
        QHash<QString, TrackerInfos> trackers_data = trackersInfos.value(h.hash(), QHash<QString, TrackerInfos>());
        QString tracker_url = misc::toQString(p->url);
        TrackerInfos data = trackers_data.value(tracker_url, TrackerInfos(tracker_url));
        data.last_message = misc::toQString(p->msg); // Store warning message
#ifndef LIBTORRENT_0_15
        data.verified = true;
        data.fail_count = 0;
#endif
        trackers_data.insert(tracker_url, data);
        trackersInfos[h.hash()] = trackers_data;
        qDebug("Received a tracker warning from %s: %s", p->url.c_str(), p->msg.c_str());
      }
    }
    else if (portmap_error_alert* p = dynamic_cast<portmap_error_alert*>(a.get())) {
      addConsoleMessage(tr("UPnP/NAT-PMP: Port mapping failure, message: %1").arg(QString(p->message().c_str())), QColor("red"));
      //emit UPnPError(QString(p->msg().c_str()));
    }
    else if (portmap_alert* p = dynamic_cast<portmap_alert*>(a.get())) {
      qDebug("UPnP Success, msg: %s", p->message().c_str());
      addConsoleMessage(tr("UPnP/NAT-PMP: Port mapping successful, message: %1").arg(QString(p->message().c_str())), QColor("blue"));
      //emit UPnPSuccess(QString(p->msg().c_str()));
    }
    else if (peer_blocked_alert* p = dynamic_cast<peer_blocked_alert*>(a.get())) {
      addPeerBanMessage(QString(p->ip.to_string().c_str()), true);
      //emit peerBlocked(QString::fromUtf8(p->ip.to_string().c_str()));
    }
    else if (peer_ban_alert* p = dynamic_cast<peer_ban_alert*>(a.get())) {
      addPeerBanMessage(QString(p->ip.address().to_string().c_str()), false);
      //emit peerBlocked(QString::fromUtf8(p->ip.to_string().c_str()));
    }
    else if (fastresume_rejected_alert* p = dynamic_cast<fastresume_rejected_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()){
        qDebug("/!\\ Fast resume failed for %s, reason: %s", h.name().toLocal8Bit().data(), p->message().c_str());
        addConsoleMessage(tr("Fast resume data was rejected for torrent %1, checking again...").arg(h.name()), QString::fromUtf8("red"));
        //emit fastResumeDataRejected(h.name());
      }
    }
    else if (url_seed_alert* p = dynamic_cast<url_seed_alert*>(a.get())) {
      addConsoleMessage(tr("Url seed lookup failed for url: %1, message: %2").arg(QString::fromUtf8(p->url.c_str())).arg(QString::fromUtf8(p->message().c_str())), QString::fromUtf8("red"));
      //emit urlSeedProblem(QString::fromUtf8(p->url.c_str()), QString::fromUtf8(p->msg().c_str()));
    }
    else if (torrent_checked_alert* p = dynamic_cast<torrent_checked_alert*>(a.get())) {
      QTorrentHandle h(p->handle);
      if(h.is_valid()){
        QString hash = h.hash();
        qDebug("%s have just finished checking", hash.toLocal8Bit().data());
        // Move to temp directory if necessary
        if(!h.is_seed() && !defaultTempPath.isEmpty()) {
          // Check if directory is different
          QDir current_dir(h.save_path());
          QDir save_dir(getSavePath(h.hash()));
          if(current_dir == save_dir) {
            h.move_storage(defaultTempPath);
          }
        }
        emit torrentFinishedChecking(h);
        emit metadataReceived(h);
      }
    }
    a = s->pop_alert();
  }
}

QHash<QString, TrackerInfos> Bittorrent::getTrackersInfo(QString hash) const{
  return trackersInfos.value(hash, QHash<QString, TrackerInfos>());
}

int Bittorrent::getListenPort() const{
  return s->listen_port();
}

session_status Bittorrent::getSessionStatus() const{
  return s->status();
}

QString Bittorrent::getSavePath(QString hash) {
  QString savePath;
  if(TorrentTempData::hasTempData(hash)) {
    savePath = TorrentTempData::getSavePath(hash);
    if(savePath.isEmpty())
      savePath = defaultSavePath;
    if(appendLabelToSavePath) {
      qDebug("appendLabelToSavePath is true");
      QString label = TorrentTempData::getLabel(hash);
      if(!label.isEmpty()) {
        QDir save_dir(savePath);
        if(save_dir.dirName() != label) {
          savePath = save_dir.absoluteFilePath(label);
        }
      }
    }
    qDebug("getSavePath, got save_path from temp data: %s", savePath.toLocal8Bit().data());
  } else {
    savePath = TorrentPersistentData::getSavePath(hash);
    if(savePath.isEmpty())
      savePath = defaultSavePath;
    if(appendLabelToSavePath) {
      QString label = TorrentPersistentData::getLabel(hash);
      if(!label.isEmpty()) {
        QDir save_dir(savePath);
        if(save_dir.dirName() != label) {
          savePath = save_dir.absoluteFilePath(label);
        }
      }
    }
    qDebug("getSavePath, got save_path from persistent data: %s", savePath.toLocal8Bit().data());
  }
  // Checking if savePath Dir exists
  // create it if it is not
  QDir saveDir(savePath);
  if(!saveDir.exists()) {
    if(!saveDir.mkpath(saveDir.path())) {
      std::cerr << "Couldn't create the save directory: " << saveDir.path().toLocal8Bit().data() << "\n";
      // XXX: Do something else?
    }
  }
  return savePath;
}

// Take an url string to a torrent file,
// download the torrent file to a tmp location, then
// add it to download list
void Bittorrent::downloadFromUrl(QString url) {
  addConsoleMessage(tr("Downloading '%1', please wait...", "e.g: Downloading 'xxx.torrent', please wait...").arg(url), QPalette::WindowText);
  //emit aboutToDownloadFromUrl(url);
  // Launch downloader thread
  downloader->downloadUrl(url);
}

void Bittorrent::downloadFromURLList(const QStringList& urls) {
  foreach(const QString &url, urls) {
    downloadFromUrl(url);
  }
}

void Bittorrent::addMagnetSkipAddDlg(QString uri) {
  addMagnetUri(uri, false);
}

void Bittorrent::downloadUrlAndSkipDialog(QString url, QString save_path) {
  //emit aboutToDownloadFromUrl(url);
  QUrl qurl = QUrl::fromEncoded(url.toLocal8Bit());
  if(!save_path.isEmpty())
    savepath_fromurl[qurl] = save_path;
  url_skippingDlg << qurl;
  // Launch downloader thread
  downloader->downloadUrl(url);
}

// Add to Bittorrent session the downloaded torrent file
void Bittorrent::processDownloadedFile(QString url, QString file_path) {
  int index = url_skippingDlg.indexOf(QUrl::fromEncoded(url.toLocal8Bit()));
  if(index < 0) {
    // Add file to torrent download list
    emit newDownloadedTorrent(file_path, url);
  } else {
    url_skippingDlg.removeAt(index);
    addTorrent(file_path, false, url, false);
  }
}

// Return current download rate for the BT
// session. Payload means that it only take into
// account "useful" part of the rate
float Bittorrent::getPayloadDownloadRate() const{
  session_status sessionStatus = s->status();
  return sessionStatus.payload_download_rate;
}

// Return current upload rate for the BT
// session. Payload means that it only take into
// account "useful" part of the rate
float Bittorrent::getPayloadUploadRate() const{
  session_status sessionStatus = s->status();
  return sessionStatus.payload_upload_rate;
}

// Save DHT entry to hard drive
void Bittorrent::saveDHTEntry() {
  // Save DHT entry
  if(DHTEnabled) {
    try{
      entry dht_state = s->dht_state();
      boost::filesystem::ofstream out((misc::qBittorrentPath()+QString::fromUtf8("dht_state")).toLocal8Bit().data(), std::ios_base::binary);
      out.unsetf(std::ios_base::skipws);
      bencode(std::ostream_iterator<char>(out), dht_state);
      qDebug("DHT entry saved");
    }catch (std::exception& e) {
      std::cerr << e.what() << "\n";
    }
  }
}

void Bittorrent::applyEncryptionSettings(pe_settings se) {
  qDebug("Applying encryption settings");
  s->set_pe_settings(se);
}

// Will fast resume torrents in
// backup directory
void Bittorrent::startUpTorrents() {
  qDebug("Resuming unfinished torrents");
  QSettings settings(QString::fromUtf8("qBittorrent"), QString::fromUtf8("qBittorrent"));
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  QStringList fileNames;
  QStringList known_torrents = TorrentPersistentData::knownTorrents();

  if(known_torrents.empty() && !settings.value("v1_4_x_torrent_imported", false).toBool()) {
    qDebug("No known torrent, importing old torrents");
    importOldTorrents();
    return;
  }

  // Safety measure because some people reported torrent loss since
  // we switch the v1.5 way of resuming torrents on startup
  QStringList filters;
  filters << "*.torrent";
  QStringList torrents_on_hd = torrentBackup.entryList(filters, QDir::Files, QDir::Unsorted);
  foreach(QString hash, torrents_on_hd) {
    hash.chop(8); // remove trailing .torrent
    if(!known_torrents.contains(hash)) {
      std::cerr << "ERROR Detected!!! Adding back torrent " << hash.toLocal8Bit().data() << " which got lost for some reason." << std::endl;
      addTorrent(torrentBackup.path()+QDir::separator()+hash+".torrent", false, QString(), true);
    }
  }
  // End of safety measure

  qDebug("Starting up torrents");
  if(isQueueingEnabled()) {
    QList<QPair<int, QString> > hashes;
    foreach(const QString &hash, known_torrents) {
      QString filePath;
      if(TorrentPersistentData::isMagnet(hash)) {
        filePath = TorrentPersistentData::getMagnetUri(hash);
      } else {
        filePath = torrentBackup.path()+QDir::separator()+hash+".torrent";
      }
      int prio = TorrentPersistentData::getPriority(hash);
      misc::insertSort2<QString>(hashes, qMakePair(prio, hash));
    }
    // Resume downloads
    QPair<int, QString> couple;
    foreach(couple, hashes) {
      QString hash = couple.second;
      qDebug("Starting up torrent %s", hash.toLocal8Bit().data());
      if(TorrentPersistentData::isMagnet(hash)) {
        addMagnetUri(TorrentPersistentData::getMagnetUri(hash), true);
      } else {
        addTorrent(torrentBackup.path()+QDir::separator()+hash+".torrent", false, QString(), true);
      }
    }
  } else {
    // Resume downloads
    foreach(const QString &hash, known_torrents) {
      qDebug("Starting up torrent %s", hash.toLocal8Bit().data());
      if(TorrentPersistentData::isMagnet(hash))
        addMagnetUri(TorrentPersistentData::getMagnetUri(hash), true);
      else
        addTorrent(torrentBackup.path()+QDir::separator()+hash+".torrent", false, QString(), true);
    }
  }
  qDebug("Unfinished torrents resumed");
}

// Import torrents temp data from v1.4.0 or earlier: save_path, filtered pieces
// TODO: Remove in qBittorrent v1.6.0
void Bittorrent::importOldTempData(QString torrent_path) {
  // Create torrent hash
  boost::intrusive_ptr<torrent_info> t;
  try {
    t = new torrent_info(torrent_path.toLocal8Bit().data());
    QString hash = misc::toQString(t->info_hash());
    // Load save path
    QFile savepath_file(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+hash+".savepath");
    QByteArray line;
    QString savePath;
    if(savepath_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
      line = savepath_file.readAll();
      savepath_file.close();
      qDebug(" -> Save path: %s", line.data());
      savePath = QString::fromUtf8(line.data());
      qDebug("Imported the following save path: %s", savePath.toLocal8Bit().data());
      TorrentTempData::setSavePath(hash, savePath);
    }
    // Load pieces priority
    QFile pieces_file(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+hash+".priorities");
    if(pieces_file.exists()){
      // Read saved file
      if(pieces_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        QByteArray pieces_priorities = pieces_file.readAll();
        pieces_file.close();
        QList<QByteArray> pieces_priorities_list = pieces_priorities.split('\n');
        std::vector<int> pp;
        for(int i=0; i<t->num_files(); ++i) {
          int priority = pieces_priorities_list.at(i).toInt();
          if( priority < 0 || priority > 7) {
            priority = 1;
          }
          //qDebug("Setting piece piority to %d", priority);
          pp.push_back(priority);
        }
        TorrentTempData::setFilesPriority(hash, pp);
        qDebug("Successfuly imported pieces_priority");
      }
    }
    // Load sequential
    if(QFile::exists(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+hash+".incremental")) {
      qDebug("Imported torrent was sequential");
      TorrentTempData::setSequential(hash, true);
    }
  } catch(std::exception&) {
  }
}

// Trackers, web seeds, speed limits
// TODO: Remove in qBittorrent v1.6.0
void Bittorrent::applyFormerAttributeFiles(QTorrentHandle h) {
  // Load trackers
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  QFile tracker_file(torrentBackup.path()+QDir::separator()+ h.hash() + ".trackers");
  if(tracker_file.exists()) {
    if(tracker_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
      QStringList lines = QString::fromUtf8(tracker_file.readAll().data()).split("\n");
      std::vector<announce_entry> trackers;
      foreach(const QString &line, lines) {
        QStringList parts = line.split("|");
        if(parts.size() != 2) continue;
        announce_entry t(parts[0].toStdString());
        t.tier = parts[1].toInt();
        trackers.push_back(t);
      }
      if(!trackers.empty()) {
        h.replace_trackers(trackers);
        h.force_reannounce();
      }
    }
  }
  // Load Web seeds
  QFile urlseeds_file(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+h.hash()+".urlseeds");
  if(urlseeds_file.exists()) {
    if(urlseeds_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
      QByteArray urlseeds_lines = urlseeds_file.readAll();
      urlseeds_file.close();
      QList<QByteArray> url_seeds = urlseeds_lines.split('\n');
      // First remove from the torrent the url seeds that were deleted
      // in a previous session
      QStringList seeds_to_delete;
      QStringList existing_seeds = h.url_seeds();
      foreach(const QString &existing_seed, existing_seeds) {
        if(!url_seeds.contains(existing_seed.toLocal8Bit())) {
          seeds_to_delete << existing_seed;
        }
      }
      foreach(const QString &existing_seed, seeds_to_delete) {
        h.remove_url_seed(existing_seed);
      }
      // Add the ones that were added in a previous session
      foreach(const QByteArray &url_seed, url_seeds) {
        if(!url_seed.isEmpty()) {
          // XXX: Should we check if it is already in the list before adding it
          // or is libtorrent clever enough to know
          h.add_url_seed(url_seed);
        }
      }
    }
  }
  // Load speed limits
  QFile speeds_file(misc::qBittorrentPath()+"BT_backup"+QDir::separator()+h.hash()+".speedLimits");
  if(speeds_file.exists()) {
    if(speeds_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
      QByteArray speed_limits = speeds_file.readAll();
      speeds_file.close();
      QList<QByteArray> speeds = speed_limits.split(' ');
      if(speeds.size() != 2) {
        std::cerr << "Invalid .speedLimits file for " << h.hash().toStdString() << '\n';
        return;
      }
      h.set_download_limit(speeds.at(0).toInt());
      h.set_upload_limit(speeds.at(1).toInt());
    }
  }
}

// Import torrents from v1.4.0 or earlier
// TODO: Remove in qBittorrent v1.6.0
void Bittorrent::importOldTorrents() {
  QSettings settings(QString::fromUtf8("qBittorrent"), QString::fromUtf8("qBittorrent"));
  Q_ASSERT(!settings.value("v1_4_x_torrent_imported", false).toBool());
  // Import old torrent
  QDir torrentBackup(misc::qBittorrentPath() + "BT_backup");
  QStringList fileNames;
  QStringList filters;
  filters << "*.torrent";
  fileNames = torrentBackup.entryList(filters, QDir::Files, QDir::Unsorted);
  if(isQueueingEnabled()) {
    QList<QPair<int, QString> > filePaths;
    foreach(const QString &fileName, fileNames) {
      QString filePath = torrentBackup.path()+QDir::separator()+fileName;
      int prio = 99999;
      // Get priority
      QString prioPath = filePath;
      prioPath.replace(".torrent", ".prio");
      if(QFile::exists(prioPath)) {
        QFile prio_file(prioPath);
        if(prio_file.open(QIODevice::ReadOnly | QIODevice::Text)) {
          bool ok = false;
          prio = prio_file.readAll().toInt(&ok);
          if(!ok)
            prio = 99999;
          prio_file.close();
        }
      }
      misc::insertSort2<QString>(filePaths, qMakePair(prio, filePath));
    }
    // Resume downloads
    QPair<int, QString> fileName;
    foreach(fileName, filePaths) {
      importOldTempData(fileName.second);
      QTorrentHandle h = addTorrent(fileName.second, false, QString(), true);
      // Sequential download
      if(TorrentTempData::hasTempData(h.hash())) {
        qDebug("addTorrent: Setting download as sequential (from tmp data)");
        h.set_sequential_download(TorrentTempData::isSequential(h.hash()));
      }
      applyFormerAttributeFiles(h);
      QString savePath = TorrentTempData::getSavePath(h.hash());
      // Save persistent data for new torrent
      TorrentPersistentData::saveTorrentPersistentData(h);
      // Save save_path
      if(!defaultTempPath.isEmpty() && !savePath.isNull()) {
        qDebug("addTorrent: Saving save_path in persistent data: %s", savePath.toLocal8Bit().data());
        TorrentPersistentData::saveSavePath(h.hash(), savePath);
      }
    }
  } else {
    QStringList filePaths;
    foreach(const QString &fileName, fileNames) {
      filePaths.append(torrentBackup.path()+QDir::separator()+fileName);
    }
    // Resume downloads
    foreach(const QString &fileName, filePaths) {
      importOldTempData(fileName);
      QTorrentHandle h = addTorrent(fileName, false, QString(), true);
      // Sequential download
      if(TorrentTempData::hasTempData(h.hash())) {
        qDebug("addTorrent: Setting download as sequential (from tmp data)");
        h.set_sequential_download(TorrentTempData::isSequential(h.hash()));
      }
      applyFormerAttributeFiles(h);
      QString savePath = TorrentTempData::getSavePath(h.hash());
      // Save persistent data for new torrent
      TorrentPersistentData::saveTorrentPersistentData(h);
      // Save save_path
      if(!defaultTempPath.isEmpty() && !savePath.isNull()) {
        qDebug("addTorrent: Saving save_path in persistent data: %s", savePath.toLocal8Bit().data());
        TorrentPersistentData::saveSavePath(h.hash(), savePath);
      }
    }
  }
  settings.setValue("v1_4_x_torrent_imported", true);
  std::cout << "Successfully imported torrents from v1.4.x (or previous) instance" << std::endl;
}