Function session

demo_example/block_echo_server.cpp:22–41

using asio::ip::tcp;

void session(tcp::socket sock) {
    int msg_index = 0;
    for (;;) {
        const size_t max_length = 1024;
        char data[max_length];
        auto [error, length] = read_some(sock, asio::buffer(data, max_length));
        msg_index++;
        if (error == asio::error::eof) {
            std::cout << "Remote client closed at message index: "
                      << msg_index - 1 << ".\n";
            break;
        } else if (error) {
            std::cout << error.message() << '\n';
            throw asio::system_error(error);
        }

        write(sock, asio::buffer(data, length));
    }
    std::cout << "Finished echo message, total: " << msg_index - 1 << ".\n";
}

void start_server(asio::io_context& io_context, unsigned short port) {
    tcp::acceptor a(io_context, tcp::endpoint(tcp::v4(), port));