142 lines
3.4 KiB
C++
142 lines
3.4 KiB
C++
//
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// stream_server.cpp
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// ~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2019 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 <cstdio>
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#include <iostream>
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#include <boost/array.hpp>
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#include <boost/bind.hpp>
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#include <boost/enable_shared_from_this.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/asio.hpp>
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#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
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using boost::asio::local::stream_protocol;
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class session
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: public boost::enable_shared_from_this<session>
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{
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public:
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session(boost::asio::io_context& io_context)
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: socket_(io_context)
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{
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}
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stream_protocol::socket& socket()
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{
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return socket_;
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}
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void start()
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{
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socket_.async_read_some(boost::asio::buffer(data_),
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boost::bind(&session::handle_read,
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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 handle_read(const boost::system::error_code& error,
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size_t bytes_transferred)
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{
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if (!error)
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{
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boost::asio::async_write(socket_,
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boost::asio::buffer(data_, bytes_transferred),
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boost::bind(&session::handle_write,
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shared_from_this(),
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boost::asio::placeholders::error));
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}
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}
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void handle_write(const boost::system::error_code& error)
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{
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if (!error)
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{
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socket_.async_read_some(boost::asio::buffer(data_),
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boost::bind(&session::handle_read,
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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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private:
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// The socket used to communicate with the client.
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stream_protocol::socket socket_;
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// Buffer used to store data received from the client.
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boost::array<char, 1024> data_;
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};
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typedef boost::shared_ptr<session> session_ptr;
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class server
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{
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public:
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server(boost::asio::io_context& io_context, const std::string& file)
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: io_context_(io_context),
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acceptor_(io_context, stream_protocol::endpoint(file))
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{
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session_ptr new_session(new session(io_context_));
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acceptor_.async_accept(new_session->socket(),
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boost::bind(&server::handle_accept, this, new_session,
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boost::asio::placeholders::error));
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}
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void handle_accept(session_ptr new_session,
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const boost::system::error_code& error)
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{
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if (!error)
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{
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new_session->start();
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}
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new_session.reset(new session(io_context_));
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acceptor_.async_accept(new_session->socket(),
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boost::bind(&server::handle_accept, this, new_session,
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boost::asio::placeholders::error));
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}
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private:
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boost::asio::io_context& io_context_;
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stream_protocol::acceptor acceptor_;
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};
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int main(int argc, char* argv[])
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{
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try
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{
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if (argc != 2)
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{
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std::cerr << "Usage: stream_server <file>\n";
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std::cerr << "*** WARNING: existing file is removed ***\n";
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return 1;
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}
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boost::asio::io_context io_context;
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std::remove(argv[1]);
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server s(io_context, argv[1]);
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io_context.run();
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}
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catch (std::exception& e)
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{
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std::cerr << "Exception: " << e.what() << "\n";
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}
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return 0;
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}
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#else // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
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# error Local sockets not available on this platform.
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#endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
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