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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_HTTP_RESPONSE_COMMAND_H
#define D_HTTP_RESPONSE_COMMAND_H
#include "AbstractCommand.h"
#include "TimeA2.h"
namespace aria2 {
class HttpConnection;
class HttpDownloadCommand;
class HttpResponse;
class SocketCore;
class StreamFilter;
#ifdef ENABLE_MESSAGE_DIGEST
class Checksum;
#endif // ENABLE_MESSAGE_DIGEST
// HttpResponseCommand receives HTTP response header from remote
// server. Because network I/O is non-blocking, execute() returns
// false when all response headers are not received. Subsequent calls
// of execute() receives remaining response headers and when all
// headers are received, it examines headers. If status code is 200
// or 206 and Range header satisfies requested range, it creates
// HttpDownloadCommand to receive response entity body. Otherwise, it
// creates HttpSkipResponseCommand to receive response entity body and
// returns true. Handling errors such as 404 or redirect is handled in
// HttpSkipResponseCommand.
class HttpResponseCommand : public AbstractCommand {
private:
std::shared_ptr<HttpConnection> httpConnection_;
bool handleDefaultEncoding(const std::shared_ptr<HttpResponse>& httpResponse);
bool handleOtherEncoding(const std::shared_ptr<HttpResponse>& httpResponse);
bool skipResponseBody(const std::shared_ptr<HttpResponse>& httpResponse);
std::unique_ptr<HttpDownloadCommand>
createHttpDownloadCommand
(const std::shared_ptr<HttpResponse>& httpResponse,
const std::shared_ptr<StreamFilter>& streamFilter);
void updateLastModifiedTime(const Time& lastModified);
void poolConnection();
void onDryRunFileFound();
#ifdef ENABLE_MESSAGE_DIGEST
// Returns true if dctx and checksum has same hash type and hash
// value. If they have same hash type but different hash value,
// throws exception. Otherwise returns false.
bool checkChecksum
(const std::shared_ptr<DownloadContext>& dctx,
const Checksum& checksum);
#endif // ENABLE_MESSAGE_DIGEST
protected:
bool executeInternal();
bool shouldInflateContentEncoding
(const std::shared_ptr<HttpResponse>& httpResponse);
public:
HttpResponseCommand(cuid_t cuid,
const std::shared_ptr<Request>& req,
const std::shared_ptr<FileEntry>& fileEntry,
RequestGroup* requestGroup,
const std::shared_ptr<HttpConnection>& httpConnection,
DownloadEngine* e,
const std::shared_ptr<SocketCore>& s);
~HttpResponseCommand();
};
} // namespace aria2
#endif // D_HTTP_RESPONSE_COMMAND_H
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