mirror of https://github.com/aria2/aria2
285 lines
8.9 KiB
C++
285 lines
8.9 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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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 of the License, or
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* (at your option) any later version.
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*
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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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*
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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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "TrackerWatcherCommand.h"
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#include <sstream>
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#include "DownloadEngine.h"
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#include "BtAnnounce.h"
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#include "BtRuntime.h"
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#include "PieceStorage.h"
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#include "PeerStorage.h"
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#include "Peer.h"
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#include "prefs.h"
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#include "message.h"
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#include "ByteArrayDiskWriterFactory.h"
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#include "RecoverableException.h"
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#include "PeerInitiateConnectionCommand.h"
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#include "DiskAdaptor.h"
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#include "FileEntry.h"
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#include "RequestGroup.h"
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#include "Option.h"
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#include "DlAbortEx.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "A2STR.h"
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#include "SocketCore.h"
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#include "Request.h"
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#include "AnnounceTier.h"
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#include "DownloadContext.h"
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#include "bittorrent_helper.h"
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#include "a2functional.h"
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#include "util.h"
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#include "fmt.h"
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namespace aria2 {
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TrackerWatcherCommand::TrackerWatcherCommand
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(cuid_t cuid, RequestGroup* requestGroup, DownloadEngine* e)
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: Command(cuid),
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requestGroup_(requestGroup),
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e_(e)
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{
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requestGroup_->increaseNumCommand();
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}
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TrackerWatcherCommand::~TrackerWatcherCommand()
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{
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requestGroup_->decreaseNumCommand();
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}
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bool TrackerWatcherCommand::execute() {
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if(requestGroup_->isForceHaltRequested()) {
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if(!trackerRequestGroup_) {
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return true;
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} else if(trackerRequestGroup_->getNumCommand() == 0 ||
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trackerRequestGroup_->downloadFinished()) {
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return true;
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} else {
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trackerRequestGroup_->setForceHaltRequested(true);
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e_->setRefreshInterval(0);
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e_->addCommand(this);
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return false;
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}
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}
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if(btAnnounce_->noMoreAnnounce()) {
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A2_LOG_DEBUG("no more announce");
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return true;
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}
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if(!trackerRequestGroup_) {
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trackerRequestGroup_ = createAnnounce();
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if(trackerRequestGroup_) {
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try {
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std::vector<Command*>* commands = new std::vector<Command*>();
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auto_delete_container<std::vector<Command*> > commandsDel(commands);
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trackerRequestGroup_->createInitialCommand(*commands, e_);
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e_->addCommand(*commands);
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commands->clear();
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A2_LOG_DEBUG("added tracker request command");
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} catch(RecoverableException& ex) {
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A2_LOG_ERROR_EX(EX_EXCEPTION_CAUGHT, ex);
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}
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}
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} else if(trackerRequestGroup_->downloadFinished()){
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try {
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std::string trackerResponse = getTrackerResponse(trackerRequestGroup_);
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processTrackerResponse(trackerResponse);
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btAnnounce_->announceSuccess();
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btAnnounce_->resetAnnounce();
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} catch(RecoverableException& ex) {
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A2_LOG_ERROR_EX(EX_EXCEPTION_CAUGHT, ex);
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btAnnounce_->announceFailure();
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if(btAnnounce_->isAllAnnounceFailed()) {
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btAnnounce_->resetAnnounce();
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}
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}
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trackerRequestGroup_.reset();
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} else if(trackerRequestGroup_->getNumCommand() == 0){
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// handle errors here
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btAnnounce_->announceFailure(); // inside it, trackers = 0.
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trackerRequestGroup_.reset();
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if(btAnnounce_->isAllAnnounceFailed()) {
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btAnnounce_->resetAnnounce();
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}
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}
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e_->addCommand(this);
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return false;
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}
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std::string TrackerWatcherCommand::getTrackerResponse
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(const SharedHandle<RequestGroup>& requestGroup)
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{
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std::stringstream strm;
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unsigned char data[2048];
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requestGroup->getPieceStorage()->getDiskAdaptor()->openFile();
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while(1) {
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ssize_t dataLength = requestGroup->getPieceStorage()->
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getDiskAdaptor()->readData(data, sizeof(data), strm.tellp());
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if(dataLength == 0) {
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break;
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}
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strm.write(reinterpret_cast<const char*>(data), dataLength);
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}
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return strm.str();
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}
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// TODO we have to deal with the exception thrown By BtAnnounce
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void TrackerWatcherCommand::processTrackerResponse
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(const std::string& trackerResponse)
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{
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btAnnounce_->processAnnounceResponse
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(reinterpret_cast<const unsigned char*>(trackerResponse.c_str()),
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trackerResponse.size());
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while(!btRuntime_->isHalt() && btRuntime_->lessThanMinPeers()) {
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SharedHandle<Peer> peer = peerStorage_->getUnusedPeer();
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if(!peer) {
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break;
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}
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peer->usedBy(e_->newCUID());
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PeerInitiateConnectionCommand* command =
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new PeerInitiateConnectionCommand
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(peer->usedBy(), requestGroup_, peer, e_, btRuntime_);
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command->setPeerStorage(peerStorage_);
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command->setPieceStorage(pieceStorage_);
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e_->addCommand(command);
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A2_LOG_DEBUG(fmt("CUID#%lld - Adding new command CUID#%s",
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getCuid(),
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util::itos(peer->usedBy()).c_str()));
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}
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}
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SharedHandle<RequestGroup> TrackerWatcherCommand::createAnnounce() {
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SharedHandle<RequestGroup> rg;
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if(btAnnounce_->isAnnounceReady()) {
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rg = createRequestGroup(btAnnounce_->getAnnounceUrl());
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btAnnounce_->announceStart(); // inside it, trackers++.
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}
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return rg;
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}
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namespace {
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bool backupTrackerIsAvailable
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(const SharedHandle<DownloadContext>& context)
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{
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SharedHandle<TorrentAttribute> torrentAttrs =
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bittorrent::getTorrentAttrs(context);
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if(torrentAttrs->announceList.size() >= 2) {
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return true;
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}
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if(torrentAttrs->announceList.empty()) {
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return false;
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}
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if(torrentAttrs->announceList[0].size() >= 2) {
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return true;
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} else {
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return false;
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}
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}
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} // namespace
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SharedHandle<RequestGroup>
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TrackerWatcherCommand::createRequestGroup(const std::string& uri)
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{
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std::vector<std::string> uris;
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uris.push_back(uri);
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SharedHandle<Option> option = util::copy(getOption());
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SharedHandle<RequestGroup> rg(new RequestGroup(option));
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if(backupTrackerIsAvailable(requestGroup_->getDownloadContext())) {
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A2_LOG_DEBUG("This is multi-tracker announce.");
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} else {
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A2_LOG_DEBUG("This is single-tracker announce.");
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}
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rg->setNumConcurrentCommand(1);
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// If backup tracker is available, try 2 times for each tracker
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// and if they all fails, then try next one.
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option->put(PREF_MAX_TRIES, "2");
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// TODO When dry-run mode becomes available in BitTorrent, set
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// PREF_DRY_RUN=false too.
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option->put(PREF_USE_HEAD, A2_V_FALSE);
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// Setting tracker timeouts
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rg->setTimeout(option->getAsInt(PREF_BT_TRACKER_TIMEOUT));
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option->put(PREF_CONNECT_TIMEOUT,
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option->get(PREF_BT_TRACKER_CONNECT_TIMEOUT));
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option->put(PREF_REUSE_URI, A2_V_FALSE);
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option->put(PREF_SELECT_LEAST_USED_HOST, A2_V_FALSE);
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static const std::string TRACKER_ANNOUNCE_FILE("[tracker.announce]");
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SharedHandle<DownloadContext> dctx
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(new DownloadContext(option->getAsInt(PREF_PIECE_LENGTH),
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0,
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TRACKER_ANNOUNCE_FILE));
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dctx->getFileEntries().front()->setUris(uris);
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rg->setDownloadContext(dctx);
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SharedHandle<DiskWriterFactory> dwf(new ByteArrayDiskWriterFactory());
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rg->setDiskWriterFactory(dwf);
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rg->setFileAllocationEnabled(false);
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rg->setPreLocalFileCheckEnabled(false);
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util::removeMetalinkContentTypes(rg);
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A2_LOG_INFO(fmt("Creating tracker request group GID#%s",
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util::itos(rg->getGID()).c_str()));
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return rg;
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}
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void TrackerWatcherCommand::setBtRuntime
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(const SharedHandle<BtRuntime>& btRuntime)
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{
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btRuntime_ = btRuntime;
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}
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void TrackerWatcherCommand::setPeerStorage
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(const SharedHandle<PeerStorage>& peerStorage)
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{
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peerStorage_ = peerStorage;
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}
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void TrackerWatcherCommand::setPieceStorage
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(const SharedHandle<PieceStorage>& pieceStorage)
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{
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pieceStorage_ = pieceStorage;
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}
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void TrackerWatcherCommand::setBtAnnounce
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(const SharedHandle<BtAnnounce>& btAnnounce)
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{
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btAnnounce_ = btAnnounce;
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}
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const SharedHandle<Option>& TrackerWatcherCommand::getOption() const
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{
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return requestGroup_->getOption();
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}
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} // namespace aria2
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