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59066d80b2
All I/O objects now have an additional Executor template parameter. This
template parameter defaults to the asio::executor type (the polymorphic
executor wrapper) but can be used to specify a user-defined executor
type.
I/O objects' constructors and functions that previously took an
asio::io_context& now accept either an Executor or a reference to a
concrete ExecutionContext (such as asio::io_context or
asio::thread_pool).
One potential point of breakage in existing user code is when reusing an
I/O object's io_context for constructing another I/O object, as in:
asio::steady_timer my_timer(my_socket.get_executor().context());
To fix this, either construct the second I/O object using the first I/O
object's executor:
asio::steady_timer my_timer(my_socket.get_executor());
or otherwise explicitly pass the io_context:
asio::steady_timer my_timer(my_io_context);
95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
//
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// connection.cpp
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// ~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "connection.hpp"
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#include <vector>
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#include <boost/bind.hpp>
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#include "request_handler.hpp"
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namespace http {
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namespace server3 {
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connection::connection(boost::asio::io_context& io_context,
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request_handler& handler)
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: strand_(io_context),
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socket_(strand_),
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request_handler_(handler)
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{
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}
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boost::asio::ip::tcp::socket& connection::socket()
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{
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return socket_;
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}
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void connection::start()
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{
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socket_.async_read_some(boost::asio::buffer(buffer_),
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boost::bind(&connection::handle_read, shared_from_this(),
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boost::asio::placeholders::error,
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boost::asio::placeholders::bytes_transferred));
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}
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void connection::handle_read(const boost::system::error_code& e,
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std::size_t bytes_transferred)
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{
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if (!e)
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{
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boost::tribool result;
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boost::tie(result, boost::tuples::ignore) = request_parser_.parse(
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request_, buffer_.data(), buffer_.data() + bytes_transferred);
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if (result)
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{
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request_handler_.handle_request(request_, reply_);
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boost::asio::async_write(socket_, reply_.to_buffers(),
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boost::bind(&connection::handle_write, shared_from_this(),
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boost::asio::placeholders::error));
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}
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else if (!result)
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{
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reply_ = reply::stock_reply(reply::bad_request);
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boost::asio::async_write(socket_, reply_.to_buffers(),
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boost::bind(&connection::handle_write, shared_from_this(),
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boost::asio::placeholders::error));
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}
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else
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{
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socket_.async_read_some(boost::asio::buffer(buffer_),
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boost::bind(&connection::handle_read, shared_from_this(),
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boost::asio::placeholders::error,
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boost::asio::placeholders::bytes_transferred));
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}
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}
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// If an error occurs then no new asynchronous operations are started. This
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// means that all shared_ptr references to the connection object will
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// disappear and the object will be destroyed automatically after this
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// handler returns. The connection class's destructor closes the socket.
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}
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void connection::handle_write(const boost::system::error_code& e)
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{
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if (!e)
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{
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// Initiate graceful connection closure.
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boost::system::error_code ignored_ec;
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socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
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}
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// No new asynchronous operations are started. This means that all shared_ptr
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// references to the connection object will disappear and the object will be
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// destroyed automatically after this handler returns. The connection class's
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// destructor closes the socket.
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}
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} // namespace server3
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} // namespace http
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