141 lines
4.3 KiB
C++
141 lines
4.3 KiB
C++
/*
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Copyright (c) 2007, 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_HTTP_CONNECTION
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#define TORRENT_HTTP_CONNECTION
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#include <boost/function.hpp>
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#include <boost/bind.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/enable_shared_from_this.hpp>
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#include <boost/noncopyable.hpp>
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#include <vector>
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#include <string>
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#include "libtorrent/socket.hpp"
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#include "libtorrent/http_tracker_connection.hpp"
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#include "libtorrent/time.hpp"
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namespace libtorrent
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{
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typedef boost::function<void(asio::error_code const&
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, http_parser const&, char const* data, int size)> http_handler;
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// TODO: add bind interface
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// when bottled, the last two arguments to the handler
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// will always be 0
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struct http_connection : boost::enable_shared_from_this<http_connection>, boost::noncopyable
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{
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http_connection(asio::io_service& ios, http_handler handler, bool bottled = true)
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: m_sock(ios)
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, m_read_pos(0)
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, m_resolver(ios)
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, m_handler(handler)
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, m_timer(ios)
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, m_last_receive(time_now())
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, m_bottled(bottled)
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, m_called(false)
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, m_rate_limit(0)
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, m_download_quota(0)
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, m_limiter_timer_active(false)
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, m_limiter_timer(ios)
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{
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assert(!m_handler.empty());
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}
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void rate_limit(int limit);
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int rate_limit() const
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{ return m_rate_limit; }
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std::string sendbuffer;
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void get(std::string const& url, time_duration timeout = seconds(30));
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void start(std::string const& hostname, std::string const& port
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, time_duration timeout);
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void close();
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private:
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void on_resolve(asio::error_code const& e
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, tcp::resolver::iterator i);
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void on_connect(asio::error_code const& e
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/* , tcp::resolver::iterator i*/);
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void on_write(asio::error_code const& e);
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void on_read(asio::error_code const& e, std::size_t bytes_transferred);
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static void on_timeout(boost::weak_ptr<http_connection> p
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, asio::error_code const& e);
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void on_assign_bandwidth(asio::error_code const& e);
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std::vector<char> m_recvbuffer;
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tcp::socket m_sock;
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int m_read_pos;
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tcp::resolver m_resolver;
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http_parser m_parser;
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http_handler m_handler;
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deadline_timer m_timer;
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time_duration m_timeout;
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ptime m_last_receive;
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// bottled means that the handler is called once, when
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// everything is received (and buffered in memory).
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// non bottled means that once the headers have been
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// received, data is streamed to the handler
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bool m_bottled;
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// set to true the first time the handler is called
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bool m_called;
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std::string m_hostname;
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std::string m_port;
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// the current download limit, in bytes per second
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// 0 is unlimited.
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int m_rate_limit;
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// the number of bytes we are allowed to receive
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int m_download_quota;
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// only hand out new quota 4 times a second if the
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// quota is 0. If it isn't 0 wait for it to reach
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// 0 and continue to hand out quota at that time.
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bool m_limiter_timer_active;
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// the timer fires every 250 millisecond as long
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// as all the quota was used.
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deadline_timer m_limiter_timer;
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};
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}
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#endif
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