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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "AbstractCommand.h"
#include "DlAbortEx.h"
#include "DlRetryEx.h"
#include "InitiateConnectionCommandFactory.h"
#include "Util.h"
#include "message.h"
#include "SleepCommand.h"
#include "prefs.h"
AbstractCommand::AbstractCommand(int cuid, Request* req, DownloadEngine* e,
const SocketHandle& s):
Command(cuid), req(req), e(e), socket(s),
checkSocketIsReadable(false), checkSocketIsWritable(false) {
setReadCheckSocket(socket);
timeout = this->e->option->getAsInt(PREF_TIMEOUT);
}
AbstractCommand::~AbstractCommand() {
disableReadCheckSocket();
disableWriteCheckSocket();
}
bool AbstractCommand::execute() {
try {
if(checkSocketIsReadable && readCheckTarget->isReadable(0) ||
checkSocketIsWritable && writeCheckTarget->isWritable(0) ||
!checkSocketIsReadable && !checkSocketIsWritable) {
checkPoint.reset();
Segment seg = { 0, 0, 0, false };
if(e->segmentMan->downloadStarted) {
// get segment information in order to set Range header.
if(!e->segmentMan->getSegment(seg, cuid)) {
// no segment available
logger->info(MSG_NO_SEGMENT_AVAILABLE, cuid);
return true;
}
}
return executeInternal(seg);
} else {
if(checkPoint.elapsed(timeout)) {
throw new DlRetryEx(EX_TIME_OUT);
}
e->commands.push_back(this);
return false;
}
} catch(DlAbortEx* err) {
logger->error(MSG_DOWNLOAD_ABORTED, err, cuid);
onAbort(err);
delete(err);
req->resetUrl();
e->segmentMan->errors++;
tryReserved();
return true;
} catch(DlRetryEx* err) {
logger->error(MSG_RESTARTING_DOWNLOAD, err, cuid);
req->addTryCount();
bool isAbort = e->option->getAsInt(PREF_MAX_TRIES) != 0 &&
req->getTryCount() >= e->option->getAsInt(PREF_MAX_TRIES);
if(isAbort) {
onAbort(err);
}
delete(err);
if(isAbort) {
logger->error(MSG_MAX_TRY, cuid, req->getTryCount());
e->segmentMan->errors++;
tryReserved();
return true;
} else {
return prepareForRetry(e->option->getAsInt(PREF_RETRY_WAIT));
}
}
}
void AbstractCommand::tryReserved() {
if(!e->segmentMan->reserved.empty()) {
Request* req = e->segmentMan->reserved.front();
e->segmentMan->reserved.pop_front();
Command* command = InitiateConnectionCommandFactory::createInitiateConnectionCommand(cuid, req, e);
e->commands.push_back(command);
}
}
bool AbstractCommand::prepareForRetry(int wait) {
Command* command = InitiateConnectionCommandFactory::createInitiateConnectionCommand(cuid, req, e);
if(wait == 0) {
e->commands.push_back(command);
} else {
SleepCommand* scom = new SleepCommand(cuid, e, command, wait);
e->commands.push_back(scom);
}
return true;
}
void AbstractCommand::onAbort(Exception* ex) {
logger->debug(MSG_UNREGISTER_CUID, cuid);
e->segmentMan->unregisterId(cuid);
}
void AbstractCommand::disableReadCheckSocket() {
if(checkSocketIsReadable) {
e->deleteSocketForReadCheck(readCheckTarget, getUuid());
checkSocketIsReadable = false;
readCheckTarget = SocketHandle();
}
}
void AbstractCommand::setReadCheckSocket(const SocketHandle& socket) {
if(!socket->isOpen()) {
disableReadCheckSocket();
} else {
if(checkSocketIsReadable) {
if(readCheckTarget != socket) {
e->deleteSocketForReadCheck(readCheckTarget, getUuid());
e->addSocketForReadCheck(socket, getUuid());
readCheckTarget = socket;
}
} else {
e->addSocketForReadCheck(socket, getUuid());
checkSocketIsReadable = true;
readCheckTarget = socket;
}
}
}
void AbstractCommand::disableWriteCheckSocket() {
if(checkSocketIsWritable) {
e->deleteSocketForWriteCheck(writeCheckTarget, getUuid());
checkSocketIsWritable = false;
writeCheckTarget = SocketHandle();
}
}
void AbstractCommand::setWriteCheckSocket(const SocketHandle& socket) {
if(!socket->isOpen()) {
disableWriteCheckSocket();
} else {
if(checkSocketIsWritable) {
if(writeCheckTarget != socket) {
e->deleteSocketForWriteCheck(writeCheckTarget, getUuid());
e->addSocketForWriteCheck(socket, getUuid());
writeCheckTarget = socket;
}
} else {
e->addSocketForWriteCheck(socket, getUuid());
checkSocketIsWritable = true;
writeCheckTarget = socket;
}
}
}
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