From ff01b716711b97c2fcaa709ea97f7650f106aa10 Mon Sep 17 00:00:00 2001 From: Miodrag Milanovic Date: Fri, 7 Oct 2016 14:13:19 +0200 Subject: Added ASIO networking library (nw) --- .../asio/src/examples/cpp11/chat/chat_server.cpp | 227 +++++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 3rdparty/asio/src/examples/cpp11/chat/chat_server.cpp (limited to '3rdparty/asio/src/examples/cpp11/chat/chat_server.cpp') diff --git a/3rdparty/asio/src/examples/cpp11/chat/chat_server.cpp b/3rdparty/asio/src/examples/cpp11/chat/chat_server.cpp new file mode 100644 index 00000000000..6e5ba3b8ee2 --- /dev/null +++ b/3rdparty/asio/src/examples/cpp11/chat/chat_server.cpp @@ -0,0 +1,227 @@ +// +// chat_server.cpp +// ~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2016 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 +#include +#include +#include +#include +#include +#include +#include "asio.hpp" +#include "chat_message.hpp" + +using asio::ip::tcp; + +//---------------------------------------------------------------------- + +typedef std::deque chat_message_queue; + +//---------------------------------------------------------------------- + +class chat_participant +{ +public: + virtual ~chat_participant() {} + virtual void deliver(const chat_message& msg) = 0; +}; + +typedef std::shared_ptr chat_participant_ptr; + +//---------------------------------------------------------------------- + +class chat_room +{ +public: + void join(chat_participant_ptr participant) + { + participants_.insert(participant); + for (auto msg: recent_msgs_) + participant->deliver(msg); + } + + void leave(chat_participant_ptr participant) + { + participants_.erase(participant); + } + + void deliver(const chat_message& msg) + { + recent_msgs_.push_back(msg); + while (recent_msgs_.size() > max_recent_msgs) + recent_msgs_.pop_front(); + + for (auto participant: participants_) + participant->deliver(msg); + } + +private: + std::set participants_; + enum { max_recent_msgs = 100 }; + chat_message_queue recent_msgs_; +}; + +//---------------------------------------------------------------------- + +class chat_session + : public chat_participant, + public std::enable_shared_from_this +{ +public: + chat_session(tcp::socket socket, chat_room& room) + : socket_(std::move(socket)), + room_(room) + { + } + + void start() + { + room_.join(shared_from_this()); + do_read_header(); + } + + void deliver(const chat_message& msg) + { + bool write_in_progress = !write_msgs_.empty(); + write_msgs_.push_back(msg); + if (!write_in_progress) + { + do_write(); + } + } + +private: + void do_read_header() + { + auto self(shared_from_this()); + asio::async_read(socket_, + asio::buffer(read_msg_.data(), chat_message::header_length), + [this, self](std::error_code ec, std::size_t /*length*/) + { + if (!ec && read_msg_.decode_header()) + { + do_read_body(); + } + else + { + room_.leave(shared_from_this()); + } + }); + } + + void do_read_body() + { + auto self(shared_from_this()); + asio::async_read(socket_, + asio::buffer(read_msg_.body(), read_msg_.body_length()), + [this, self](std::error_code ec, std::size_t /*length*/) + { + if (!ec) + { + room_.deliver(read_msg_); + do_read_header(); + } + else + { + room_.leave(shared_from_this()); + } + }); + } + + void do_write() + { + auto self(shared_from_this()); + asio::async_write(socket_, + asio::buffer(write_msgs_.front().data(), + write_msgs_.front().length()), + [this, self](std::error_code ec, std::size_t /*length*/) + { + if (!ec) + { + write_msgs_.pop_front(); + if (!write_msgs_.empty()) + { + do_write(); + } + } + else + { + room_.leave(shared_from_this()); + } + }); + } + + tcp::socket socket_; + chat_room& room_; + chat_message read_msg_; + chat_message_queue write_msgs_; +}; + +//---------------------------------------------------------------------- + +class chat_server +{ +public: + chat_server(asio::io_context& io_context, + const tcp::endpoint& endpoint) + : acceptor_(io_context, endpoint) + { + do_accept(); + } + +private: + void do_accept() + { + acceptor_.async_accept( + [this](std::error_code ec, tcp::socket socket) + { + if (!ec) + { + std::make_shared(std::move(socket), room_)->start(); + } + + do_accept(); + }); + } + + tcp::acceptor acceptor_; + chat_room room_; +}; + +//---------------------------------------------------------------------- + +int main(int argc, char* argv[]) +{ + try + { + if (argc < 2) + { + std::cerr << "Usage: chat_server [ ...]\n"; + return 1; + } + + asio::io_context io_context; + + std::list servers; + for (int i = 1; i < argc; ++i) + { + tcp::endpoint endpoint(tcp::v4(), std::atoi(argv[i])); + servers.emplace_back(io_context, endpoint); + } + + io_context.run(); + } + catch (std::exception& e) + { + std::cerr << "Exception: " << e.what() << "\n"; + } + + return 0; +} -- cgit v1.2.3-70-g09d2