253 lines
7.1 KiB
C++
253 lines
7.1 KiB
C++
/*
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Copyright (c) 2007-2016, 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_HTTP_CONNECTION
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#define TORRENT_HTTP_CONNECTION
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include <boost/function/function1.hpp>
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#include <boost/function/function2.hpp>
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#include <boost/function/function5.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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#ifdef TORRENT_USE_OPENSSL
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#include <boost/asio/ssl/context.hpp>
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#endif
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/error_code.hpp"
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#include "libtorrent/http_parser.hpp"
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#include "libtorrent/deadline_timer.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/socket_type.hpp"
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#include "libtorrent/session_settings.hpp"
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#include "libtorrent/i2p_stream.hpp"
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namespace libtorrent
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{
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struct http_connection;
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struct resolver_interface;
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const int default_max_bottled_buffer_size = 2*1024*1024;
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typedef boost::function<void(error_code const&
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, http_parser const&, char const* data, int size, http_connection&)> http_handler;
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typedef boost::function<void(http_connection&)> http_connect_handler;
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typedef boost::function<void(http_connection&, std::vector<tcp::endpoint>&)> http_filter_handler;
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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 TORRENT_EXTRA_EXPORT http_connection
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: boost::enable_shared_from_this<http_connection>
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, boost::noncopyable
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{
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http_connection(io_service& ios
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, resolver_interface& resolver
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, http_handler const& handler
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, bool bottled = true
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, int max_bottled_buffer_size = default_max_bottled_buffer_size
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, http_connect_handler const& ch = http_connect_handler()
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, http_filter_handler const& fh = http_filter_handler()
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#ifdef TORRENT_USE_OPENSSL
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, ssl::context* ssl_ctx = 0
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#endif
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);
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virtual ~http_connection();
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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 m_sendbuffer;
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void get(std::string const& url, time_duration timeout = seconds(30)
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, int prio = 0, aux::proxy_settings const* ps = NULL, int handle_redirects = 5
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, std::string const& user_agent = std::string()
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, address const& bind_addr = address_v4::any()
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, int resolve_flags = 0, std::string const& auth_ = std::string()
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#if TORRENT_USE_I2P
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, i2p_connection* i2p_conn = 0
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#endif
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);
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void start(std::string const& hostname, int port
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, time_duration timeout, int prio = 0, aux::proxy_settings const* ps = NULL
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, bool ssl = false, int handle_redirect = 5
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, address const& bind_addr = address_v4::any()
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, int resolve_flags = 0
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#if TORRENT_USE_I2P
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, i2p_connection* i2p_conn = 0
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#endif
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);
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void close(bool force = false);
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socket_type const& socket() const { return m_sock; }
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std::vector<tcp::endpoint> const& endpoints() const { return m_endpoints; }
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private:
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#if TORRENT_USE_I2P
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void connect_i2p_tracker(char const* destination);
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void on_i2p_resolve(error_code const& e
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, char const* destination);
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#endif
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void on_resolve(error_code const& e
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, std::vector<address> const& addresses);
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void connect();
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void on_connect(error_code const& e);
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void on_write(error_code const& e);
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void on_read(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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, error_code const& e);
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void on_assign_bandwidth(error_code const& e);
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void callback(error_code e, char* data = NULL, int size = 0);
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std::vector<char> m_recvbuffer;
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std::string m_hostname;
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std::string m_url;
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std::string m_user_agent;
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std::vector<tcp::endpoint> m_endpoints;
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// if the current connection attempt fails, we'll connect to the
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// endpoint with this index (in m_endpoints) next
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int m_next_ep;
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socket_type m_sock;
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#ifdef TORRENT_USE_OPENSSL
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ssl::context* m_ssl_ctx;
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bool m_own_ssl_context;
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#endif
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#if TORRENT_USE_I2P
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i2p_connection* m_i2p_conn;
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#endif
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resolver_interface& m_resolver;
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http_parser m_parser;
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http_handler m_handler;
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http_connect_handler m_connect_handler;
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http_filter_handler m_filter_handler;
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deadline_timer m_timer;
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time_duration m_read_timeout;
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time_duration m_completion_timeout;
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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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time_point m_last_receive;
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time_point m_start_time;
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// specifies whether or not the connection is
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// configured to use a proxy
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aux::proxy_settings m_proxy;
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// the address to bind to. address_v4::any()
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// means do not bind
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address m_bind_addr;
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// if username password was passed in, remember it in case we need to
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// re-issue the request for a redirect
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std::string m_auth;
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int m_read_pos;
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// the number of redirects to follow (in sequence)
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int m_redirects;
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// maximum size of bottled buffer
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int m_max_bottled_buffer_size;
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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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// the priority we have in the connection queue.
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// 0 is normal, 1 is high
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int m_priority;
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// used for DNS lookups
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int m_resolve_flags;
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boost::uint16_t m_port;
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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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// 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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// true if the connection is using ssl
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bool m_ssl;
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bool m_abort;
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// true while waiting for an async_connect
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bool m_connecting;
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};
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}
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#endif
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