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- //
- // stream_server.cpp
- // ~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <cstdio>
- #include <iostream>
- #include <boost/array.hpp>
- #include <boost/bind.hpp>
- #include <boost/enable_shared_from_this.hpp>
- #include <boost/shared_ptr.hpp>
- #include <boost/asio.hpp>
- #if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
- using boost::asio::local::stream_protocol;
- class session
- : public boost::enable_shared_from_this<session>
- {
- public:
- session(boost::asio::io_context& io_context)
- : socket_(io_context)
- {
- }
- stream_protocol::socket& socket()
- {
- return socket_;
- }
- void start()
- {
- socket_.async_read_some(boost::asio::buffer(data_),
- boost::bind(&session::handle_read,
- shared_from_this(),
- boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred));
- }
- void handle_read(const boost::system::error_code& error,
- size_t bytes_transferred)
- {
- if (!error)
- {
- boost::asio::async_write(socket_,
- boost::asio::buffer(data_, bytes_transferred),
- boost::bind(&session::handle_write,
- shared_from_this(),
- boost::asio::placeholders::error));
- }
- }
- void handle_write(const boost::system::error_code& error)
- {
- if (!error)
- {
- socket_.async_read_some(boost::asio::buffer(data_),
- boost::bind(&session::handle_read,
- shared_from_this(),
- boost::asio::placeholders::error,
- boost::asio::placeholders::bytes_transferred));
- }
- }
- private:
- // The socket used to communicate with the client.
- stream_protocol::socket socket_;
- // Buffer used to store data received from the client.
- boost::array<char, 1024> data_;
- };
- typedef boost::shared_ptr<session> session_ptr;
- class server
- {
- public:
- server(boost::asio::io_context& io_context, const std::string& file)
- : io_context_(io_context),
- acceptor_(io_context, stream_protocol::endpoint(file))
- {
- session_ptr new_session(new session(io_context_));
- acceptor_.async_accept(new_session->socket(),
- boost::bind(&server::handle_accept, this, new_session,
- boost::asio::placeholders::error));
- }
- void handle_accept(session_ptr new_session,
- const boost::system::error_code& error)
- {
- if (!error)
- {
- new_session->start();
- }
- new_session.reset(new session(io_context_));
- acceptor_.async_accept(new_session->socket(),
- boost::bind(&server::handle_accept, this, new_session,
- boost::asio::placeholders::error));
- }
- private:
- boost::asio::io_context& io_context_;
- stream_protocol::acceptor acceptor_;
- };
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: stream_server <file>\n";
- std::cerr << "*** WARNING: existing file is removed ***\n";
- return 1;
- }
- boost::asio::io_context io_context;
- std::remove(argv[1]);
- server s(io_context, argv[1]);
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
- #else // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
- # error Local sockets not available on this platform.
- #endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
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