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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 "HttpResponseCommand.h"
#include "DlAbortEx.h"
#include "DlRetryEx.h"
#include "HttpDownloadCommand.h"
#include "HttpInitiateConnectionCommand.h"
#include "message.h"
#include "Util.h"
#include "TrackerDownloadCommand.h"
// TODO
#include "TorrentDownloadEngine.h"
HttpResponseCommand::HttpResponseCommand(int cuid, Request* req, DownloadEngine* e, const Socket* s):
AbstractCommand(cuid, req, e, s) {
http = new HttpConnection(cuid, socket, req, e->option, e->logger);
}
HttpResponseCommand::~HttpResponseCommand() {
delete http;
}
bool HttpResponseCommand::executeInternal(Segment seg) {
if(req->seg.sp != seg.sp) {
e->logger->info(MSG_SEGMENT_CHANGED, cuid);
return prepareForRetry(0);
}
HttpHeader headers;
int status = http->receiveResponse(headers);
if(status == 0) {
// didn't receive header fully
e->commands.push(this);
return false;
}
// check HTTP status number
checkResponse(status, seg);
retrieveCookie(headers);
// check whether Location header exists. If it does, update request object
// with redirected URL.
// then establish a connection to the new host and port
if(headers.defined("Location")) {
return handleRedirect(headers.getFirst("Location"), headers);
}
if(!e->segmentMan->downloadStarted) {
string transferEncoding;
if(headers.defined("Transfer-Encoding")) {
return handleOtherEncoding(headers.getFirst("Transfer-Encoding"), headers);
} else {
return handleDefaultEncoding(headers);
}
} else {
if(req->getFile() != e->segmentMan->filename) {
throw new DlAbortEx(EX_FILENAME_MISMATCH, req->getFile().c_str(), e->segmentMan->filename.c_str());
}
createHttpDownloadCommand();
return true;
}
}
void HttpResponseCommand::checkResponse(int status, const Segment& segment) {
if(!(status < 400 && status >= 300 ||
(segment.sp+segment.ds == 0 && status == 200)
|| (segment.sp+segment.ds > 0 && status == 206))) {
throw new DlRetryEx(EX_BAD_STATUS, status);
}
}
bool HttpResponseCommand::handleRedirect(string url, const HttpHeader& headers) {
req->redirectUrl(url);
e->logger->info(MSG_REDIRECT, cuid, url.c_str());
e->noWait = true;
return prepareForRetry(0);
}
bool HttpResponseCommand::handleDefaultEncoding(const HttpHeader& headers) {
// TODO quick and dirty way
if(req->isTorrent) {
long long int size = headers.getFirstAsLLInt("Content-Length");
e->segmentMan->totalSize = size;
e->segmentMan->isSplittable = false;
createHttpDownloadCommand();
return true;
}
long long int size = headers.getFirstAsLLInt("Content-Length");
if(size == LONG_LONG_MAX || size < 0) {
throw new DlAbortEx(EX_TOO_LARGE_FILE, size);
}
e->segmentMan->isSplittable = !(size == 0);
e->segmentMan->filename = req->getFile();
bool segFileExists = e->segmentMan->segmentFileExists();
e->segmentMan->downloadStarted = true;
if(segFileExists) {
e->segmentMan->load();
e->diskWriter->openExistingFile(e->segmentMan->getFilePath());
// send request again to the server with Range header
return prepareForRetry(0);
} else {
e->segmentMan->totalSize = size;
Segment seg;
e->segmentMan->getSegment(seg, cuid);
e->diskWriter->initAndOpenFile(e->segmentMan->getFilePath());
createHttpDownloadCommand();
return true;
}
}
bool HttpResponseCommand::handleOtherEncoding(string transferEncoding, const HttpHeader& headers) {
// we ignore content-length when transfer-encoding is set
e->segmentMan->downloadStarted = true;
e->segmentMan->isSplittable = false;
e->segmentMan->filename = req->getFile();
e->segmentMan->totalSize = 0;
Segment seg;
e->segmentMan->getSegment(seg, cuid);
e->diskWriter->initAndOpenFile(e->segmentMan->getFilePath());
createHttpDownloadCommand(transferEncoding);
return true;
}
void HttpResponseCommand::createHttpDownloadCommand(string transferEncoding) {
if(!req->isTorrent) {
HttpDownloadCommand* command = new HttpDownloadCommand(cuid, req, e, socket);
TransferEncoding* enc = NULL;
if(transferEncoding.size() && (enc = command->getTransferEncoding(transferEncoding)) == NULL) {
delete(command);
throw new DlAbortEx(EX_TRANSFER_ENCODING_NOT_SUPPORTED, transferEncoding.c_str());
} else {
if(enc != NULL) {
command->transferEncoding = transferEncoding;
enc->init();
}
e->commands.push(command);
}
} else {
// TODO
TrackerDownloadCommand* command = new TrackerDownloadCommand(cuid, req, (TorrentDownloadEngine*)e, socket);
e->commands.push(command);
}
}
void HttpResponseCommand::retrieveCookie(const HttpHeader& headers) {
Strings v = headers.get("Set-Cookie");
for(Strings::const_iterator itr = v.begin(); itr != v.end(); itr++) {
Cookie c;
req->cookieBox->parse(c, *itr);
req->cookieBox->add(c);
}
}
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