161 lines
5.2 KiB
C++
161 lines
5.2 KiB
C++
/*
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Copyright (c) 2003-2016, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_WEB_PEER_CONNECTION_HPP_INCLUDED
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#define TORRENT_WEB_PEER_CONNECTION_HPP_INCLUDED
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include <ctime>
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#include <algorithm>
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#include <vector>
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#include <deque>
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#include <string>
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#include <boost/smart_ptr.hpp>
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#include <boost/weak_ptr.hpp>
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#include <boost/noncopyable.hpp>
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#include <array>
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#include <boost/optional.hpp>
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#include <boost/cstdint.hpp>
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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#include "libtorrent/config.hpp"
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#include "libtorrent/web_connection_base.hpp"
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#include "libtorrent/disk_buffer_holder.hpp"
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#include "libtorrent/torrent.hpp"
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#include "libtorrent/piece_block_progress.hpp"
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#include "libtorrent/http_parser.hpp"
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#include "libtorrent/operations.hpp" // for operation_t enum
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namespace libtorrent
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{
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class torrent;
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class TORRENT_EXTRA_EXPORT web_peer_connection
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: public web_connection_base
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{
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friend class invariant_access;
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public:
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// this is the constructor where the we are the active part.
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// The peer_conenction should handshake and verify that the
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// other end has the correct id
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web_peer_connection(peer_connection_args const& pack
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, web_seed_t& web);
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virtual void on_connected() override;
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virtual int type() const override
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{ return peer_connection::url_seed_connection; }
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// called from the main loop when this connection has any
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// work to do.
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virtual void on_receive(error_code const& error
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, std::size_t bytes_transferred) override;
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std::string const& url() const override { return m_url; }
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virtual void get_specific_peer_info(peer_info& p) const override;
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virtual void disconnect(error_code const& ec
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, operation_t op, int error = 0) override;
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virtual void write_request(peer_request const& r) override;
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virtual bool received_invalid_data(int index, bool single_peer) override;
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private:
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void on_receive_padfile();
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void incoming_payload(char const* buf, int len);
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void incoming_zeroes(int len);
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void handle_redirect(int bytes_left);
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void handle_error(int bytes_left);
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void maybe_harvest_piece();
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// returns the block currently being
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// downloaded. And the progress of that
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// block. If the peer isn't downloading
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// a piece for the moment, the boost::optional
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// will be invalid.
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boost::optional<piece_block_progress> downloading_piece_progress() const override;
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void handle_padfile();
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// this has one entry per http-request
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// (might be more than the bt requests)
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struct file_request_t
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{
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int file_index;
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int length;
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boost::int64_t start;
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};
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std::deque<file_request_t> m_file_requests;
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std::string m_url;
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web_seed_t* m_web;
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// this is used for intermediate storage of pieces to be delivered to the
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// bittorrent engine
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// TODO: 3 if we make this be a disk_buffer_holder instead
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// we would save a copy
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// use allocate_disk_receive_buffer and release_disk_receive_buffer
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std::vector<char> m_piece;
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// the number of bytes we've forwarded to the incoming_payload() function
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// in the current HTTP response. used to know where in the buffer the
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// next response starts
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int m_received_body;
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// this is the offset inside the current receive
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// buffer where the next chunk header will be.
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// this is updated for each chunk header that's
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// parsed. It does not necessarily point to a valid
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// offset in the receive buffer, if we haven't received
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// it yet. This offset never includes the HTTP header
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int m_chunk_pos;
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// this is the number of bytes we've already received
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// from the next chunk header we're waiting for
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int m_partial_chunk_header;
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// the number of responses we've received so far on
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// this connection
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int m_num_responses;
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};
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}
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#endif // TORRENT_WEB_PEER_CONNECTION_HPP_INCLUDED
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