mirror of
https://github.com/aria2/aria2.git
synced 2025-04-06 22:17:38 +03:00
292 lines
8.9 KiB
C++
292 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 "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 "RequestGroupMan.h"
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#include "FileAllocationEntry.h"
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#include "CheckIntegrityEntry.h"
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#include "ServerStatMan.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.isNull()) {
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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->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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if(logger->debug()) {
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logger->debug("no more announce");
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}
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return true;
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}
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if(_trackerRequestGroup.isNull()) {
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_trackerRequestGroup = createAnnounce();
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if(!_trackerRequestGroup.isNull()) {
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std::vector<Command*> commands;
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try {
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_trackerRequestGroup->createInitialCommand(commands, e);
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} catch(RecoverableException& ex) {
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logger->error(EX_EXCEPTION_CAUGHT, ex);
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std::for_each(commands.begin(), commands.end(), Deleter());
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commands.clear();
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}
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e->addCommand(commands);
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if(logger->debug()) {
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logger->debug("added tracker request command");
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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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logger->error(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.isNull()) {
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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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if(logger->debug()) {
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logger->debug("CUID#%s - Adding new command CUID#%s",
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util::itos(cuid).c_str(),
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util::itos(peer->usedBy()).c_str());
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}
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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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static bool backupTrackerIsAvailable
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(const SharedHandle<DownloadContext>& context)
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{
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const BDE& announceList =
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context->getAttribute(bittorrent::BITTORRENT)[bittorrent::ANNOUNCE_LIST];
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if(announceList.size() >= 2) {
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return true;
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}
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if(announceList.empty()) {
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return false;
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}
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if(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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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<RequestGroup> rg(new RequestGroup(getOption()));
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if(backupTrackerIsAvailable(_requestGroup->getDownloadContext())) {
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if(logger->debug()) {
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logger->debug("This is multi-tracker announce.");
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}
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} else {
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if(logger->debug()) {
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logger->debug("This is single-tracker announce.");
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}
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}
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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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rg->getOption()->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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rg->getOption()->put(PREF_USE_HEAD, V_FALSE);
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// Setting tracker timeouts
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rg->setTimeout(rg->getOption()->getAsInt(PREF_BT_TRACKER_TIMEOUT));
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rg->getOption()->put(PREF_CONNECT_TIMEOUT,
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rg->getOption()->get(PREF_BT_TRACKER_CONNECT_TIMEOUT));
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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(getOption()->getAsInt(PREF_SEGMENT_SIZE),
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0,
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TRACKER_ANNOUNCE_FILE));
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dctx->setDir(A2STR::NIL);
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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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if(logger->info()) {
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logger->info("Creating tracker request group GID#%s",
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util::itos(rg->getGID()).c_str());
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}
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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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