mirror of https://github.com/aria2/aria2
113 lines
4.1 KiB
C++
113 lines
4.1 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 "HttpDownloadCommand.h"
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#include "RequestGroup.h"
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#include "DownloadEngine.h"
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#include "Request.h"
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#include "HttpRequestCommand.h"
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#include "HttpConnection.h"
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#include "HttpRequest.h"
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#include "Segment.h"
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#include "Socket.h"
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#include "prefs.h"
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#include "Option.h"
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#include "HttpResponse.h"
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#include "HttpHeader.h"
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#include "Range.h"
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#include "DownloadContext.h"
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namespace aria2 {
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HttpDownloadCommand::HttpDownloadCommand
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(int cuid,
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const RequestHandle& req,
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const SharedHandle<FileEntry>& fileEntry,
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RequestGroup* requestGroup,
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const SharedHandle<HttpResponse>& httpResponse,
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const HttpConnectionHandle& httpConnection,
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DownloadEngine* e,
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const SocketHandle& socket)
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:DownloadCommand(cuid, req, fileEntry, requestGroup, e, socket),
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_httpResponse(httpResponse),
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_httpConnection(httpConnection) {}
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HttpDownloadCommand::~HttpDownloadCommand() {}
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bool HttpDownloadCommand::prepareForNextSegment() {
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bool downloadFinished = _requestGroup->downloadFinished();
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if(req->isPipeliningEnabled() && !downloadFinished) {
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HttpRequestCommand* command =
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new HttpRequestCommand(cuid, req, _fileEntry,
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_requestGroup, _httpConnection, e,
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socket);
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// Set proxy request here. aria2 sends the HTTP request specialized for
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// proxy.
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if(resolveProxyMethod(req->getProtocol()) == V_GET) {
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command->setProxyRequest(createProxyRequest());
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}
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e->commands.push_back(command);
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return true;
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} else {
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if(req->isPipeliningEnabled() ||
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(req->isKeepAliveEnabled() &&
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((!_transferEncodingDecoder.isNull() &&
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_requestGroup->downloadFinished()) ||
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_fileEntry->getLastOffset() == _segments.front()->getPositionToWrite()))) {
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e->poolSocket(req, isProxyDefined(), socket);
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}
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// The request was sent assuming that server supported pipelining, but
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// it turned out that server didn't support it.
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// We detect this situation by comparing the end byte in range header
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// of the response with the end byte of segment.
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// If it is the same, HTTP negotiation is necessary for the next request.
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if(!req->isPipeliningEnabled() && req->isPipeliningHint() &&
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!downloadFinished) {
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const SharedHandle<Segment>& segment = _segments.front();
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off_t lastOffset =_fileEntry->gtoloff
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(std::min(static_cast<off_t>(segment->getPosition()+segment->getLength()),
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_fileEntry->getLastOffset()));
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if(lastOffset ==
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_httpResponse->getHttpHeader()->getRange()->getEndByte()+1) {
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return prepareForRetry(0);
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}
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}
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return DownloadCommand::prepareForNextSegment();
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}
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}
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} // namespace aria2
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