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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 "DownloadCommand.h"
#include "Util.h"
#include "DlRetryEx.h"
#include "DlAbortEx.h"
#include "HttpInitiateConnectionCommand.h"
#include "InitiateConnectionCommandFactory.h"
#include "message.h"
#include "prefs.h"
#include <sys/time.h>
DownloadCommand::DownloadCommand(int cuid, Request* req, DownloadEngine* e,
const SocketHandle& s):
AbstractCommand(cuid, req, e, s), lastSize(0) {
}
DownloadCommand::~DownloadCommand() {}
bool DownloadCommand::executeInternal(Segment seg) {
TransferEncoding* te = NULL;
if(transferEncoding.size()) {
te = getTransferEncoding(transferEncoding);
assert(te != NULL);
}
int bufSize = 4096;
char buf[bufSize];
socket->readData(buf, bufSize);
if(te != NULL) {
int infbufSize = 4096;
char infbuf[infbufSize];
te->inflate(infbuf, infbufSize, buf, bufSize);
e->segmentMan->diskWriter->writeData(infbuf, infbufSize, seg.sp+seg.ds);
seg.ds += infbufSize;
} else {
e->segmentMan->diskWriter->writeData(buf, bufSize, seg.sp+seg.ds);
seg.ds += bufSize;
}
// calculate downloading speed
int diff = sw.difference();
if(diff >= 1) {
seg.speed = (int)((seg.ds-lastSize)/(diff*1.0));
sw.reset();
lastSize = seg.ds;
int lowestLimit = e->option->getAsInt(PREF_LOWEST_SPEED_LIMIT);
if(lowestLimit > 0 && seg.speed <= lowestLimit) {
throw new DlAbortEx("CUID#%d - Too slow Downloading speed: %d <= %d(B/s)",
cuid,
seg.speed,
lowestLimit);
}
}
if(e->segmentMan->totalSize != 0 && bufSize == 0) {
throw new DlRetryEx(EX_GOT_EOF);
}
if(te != NULL && te->finished()
|| te == NULL && seg.ds >= seg.ep-seg.sp+1
|| bufSize == 0) {
if(te != NULL) te->end();
logger->info(MSG_DOWNLOAD_COMPLETED, cuid);
seg.ds = seg.ep-seg.sp+1;
seg.finish = true;
e->segmentMan->updateSegment(seg);
// this unit is going to download another segment.
return prepareForNextSegment();
} else {
e->segmentMan->updateSegment(seg);
e->commands.push_back(this);
return false;
}
}
bool DownloadCommand::prepareForRetry(int wait) {
//req->resetUrl();
return AbstractCommand::prepareForRetry(wait);
}
bool DownloadCommand::prepareForNextSegment() {
req->resetUrl();
if(!e->segmentMan->finished()) {
return AbstractCommand::prepareForRetry(0);
} else {
return true;
}
}
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