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author | 2016-10-07 14:13:19 +0200 | |
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committer | 2016-10-07 14:13:19 +0200 | |
commit | ff01b716711b97c2fcaa709ea97f7650f106aa10 (patch) | |
tree | 50dd4d687f38f50c4e136af030c02c267c769f3a /3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp | |
parent | 2a138159c30457aecd9e9679be5159704db0f954 (diff) |
Added ASIO networking library (nw)
Diffstat (limited to '3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp')
-rw-r--r-- | 3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp b/3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp new file mode 100644 index 00000000000..e672a022d04 --- /dev/null +++ b/3rdparty/asio/src/examples/cpp11/chat/chat_client.cpp @@ -0,0 +1,167 @@ +// +// chat_client.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 <cstdlib> +#include <deque> +#include <iostream> +#include <thread> +#include "asio.hpp" +#include "chat_message.hpp" + +using asio::ip::tcp; + +typedef std::deque<chat_message> chat_message_queue; + +class chat_client +{ +public: + chat_client(asio::io_context& io_context, + const tcp::resolver::results_type& endpoints) + : io_context_(io_context), + socket_(io_context) + { + do_connect(endpoints); + } + + void write(const chat_message& msg) + { + asio::post(io_context_, + [this, msg]() + { + bool write_in_progress = !write_msgs_.empty(); + write_msgs_.push_back(msg); + if (!write_in_progress) + { + do_write(); + } + }); + } + + void close() + { + asio::post(io_context_, [this]() { socket_.close(); }); + } + +private: + void do_connect(const tcp::resolver::results_type& endpoints) + { + asio::async_connect(socket_, endpoints, + [this](std::error_code ec, tcp::endpoint) + { + if (!ec) + { + do_read_header(); + } + }); + } + + void do_read_header() + { + asio::async_read(socket_, + asio::buffer(read_msg_.data(), chat_message::header_length), + [this](std::error_code ec, std::size_t /*length*/) + { + if (!ec && read_msg_.decode_header()) + { + do_read_body(); + } + else + { + socket_.close(); + } + }); + } + + void do_read_body() + { + asio::async_read(socket_, + asio::buffer(read_msg_.body(), read_msg_.body_length()), + [this](std::error_code ec, std::size_t /*length*/) + { + if (!ec) + { + std::cout.write(read_msg_.body(), read_msg_.body_length()); + std::cout << "\n"; + do_read_header(); + } + else + { + socket_.close(); + } + }); + } + + void do_write() + { + asio::async_write(socket_, + asio::buffer(write_msgs_.front().data(), + write_msgs_.front().length()), + [this](std::error_code ec, std::size_t /*length*/) + { + if (!ec) + { + write_msgs_.pop_front(); + if (!write_msgs_.empty()) + { + do_write(); + } + } + else + { + socket_.close(); + } + }); + } + +private: + asio::io_context& io_context_; + tcp::socket socket_; + chat_message read_msg_; + chat_message_queue write_msgs_; +}; + +int main(int argc, char* argv[]) +{ + try + { + if (argc != 3) + { + std::cerr << "Usage: chat_client <host> <port>\n"; + return 1; + } + + asio::io_context io_context; + + tcp::resolver resolver(io_context); + auto endpoints = resolver.resolve(argv[1], argv[2]); + chat_client c(io_context, endpoints); + + std::thread t([&io_context](){ io_context.run(); }); + + char line[chat_message::max_body_length + 1]; + while (std::cin.getline(line, chat_message::max_body_length + 1)) + { + chat_message msg; + msg.body_length(std::strlen(line)); + std::memcpy(msg.body(), line, msg.body_length()); + msg.encode_header(); + c.write(msg); + } + + c.close(); + t.join(); + } + catch (std::exception& e) + { + std::cerr << "Exception: " << e.what() << "\n"; + } + + return 0; +} |