Boost中Echo的tcp例程

Boost中Echo的TCP的Server版本

//// async_tcp_echo_server.cpp// ~~~~~~~~~~~~~~~~~~~~~~~~~//// Copyright (c) 2003-2013 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 <iostream>#include <boost/bind.hpp>#include <boost/asio.hpp>using boost::asio::ip::tcp;class session{public:  session(boost::asio::io_service& io_service)    : socket_(io_service)  {  }  tcp::socket& socket()  {    return socket_;  }  void start()  {    socket_.async_read_some(boost::asio::buffer(data_, max_length),        boost::bind(&session::handle_read, this,          boost::asio::placeholders::error,          boost::asio::placeholders::bytes_transferred));  }private:  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, this,            boost::asio::placeholders::error));    }    else    {      delete this;    }  }  void handle_write(const boost::system::error_code& error)  {    if (!error)    {      socket_.async_read_some(boost::asio::buffer(data_, max_length),          boost::bind(&session::handle_read, this,            boost::asio::placeholders::error,            boost::asio::placeholders::bytes_transferred));    }    else    {      delete this;    }  }  tcp::socket socket_;  enum { max_length = 1024 };  char data_[max_length];};class server{public:  server(boost::asio::io_service& io_service, short port)    : io_service_(io_service),      acceptor_(io_service, tcp::endpoint(tcp::v4(), port))  {    start_accept();  }private:  void start_accept()  {    session* new_session = new session(io_service_);    acceptor_.async_accept(new_session->socket(),        boost::bind(&server::handle_accept, this, new_session,          boost::asio::placeholders::error));  }  void handle_accept(session* new_session,      const boost::system::error_code& error)  {    if (!error)    {      new_session->start();    }    else    {      delete new_session;    }    start_accept();  }  boost::asio::io_service& io_service_;  tcp::acceptor acceptor_;};int main(int argc, char* argv[]){  try  {    if (argc != 2)    {      std::cerr << "Usage: async_tcp_echo_server <port>\n";      return 1;    }    boost::asio::io_service io_service;    using namespace std; // For atoi.    server s(io_service, atoi(argv[1]));    io_service.run();  }  catch (std::exception& e)  {    std::cerr << "Exception: " << e.what() << "\n";  }  return 0;}

Boost中ECHO的Client

//// blocking_tcp_echo_client.cpp// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~//// Copyright (c) 2003-2013 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 <cstring>#include <iostream>#include <boost/asio.hpp>using boost::asio::ip::tcp;enum { max_length = 1024 };int main(int argc, char* argv[]){  try  {    if (argc != 3)    {      std::cerr << "Usage: blocking_tcp_echo_client <host> <port>\n";      return 1;    }    boost::asio::io_service io_service;    tcp::resolver resolver(io_service);    tcp::resolver::query query(tcp::v4(), argv[1], argv[2]);    tcp::resolver::iterator iterator = resolver.resolve(query);    tcp::socket s(io_service);    boost::asio::connect(s, iterator);    using namespace std; // For strlen.    std::cout << "Enter message: ";    char request[max_length];    std::cin.getline(request, max_length);    size_t request_length = strlen(request);    boost::asio::write(s, boost::asio::buffer(request, request_length));    char reply[max_length];    size_t reply_length = boost::asio::read(s,        boost::asio::buffer(reply, request_length));    std::cout << "Reply is: ";    std::cout.write(reply, reply_length);    std::cout << "\n";  }  catch (std::exception& e)  {    std::cerr << "Exception: " << e.what() << "\n";  }  return 0;}

简单封装下发送和接收：

void session::READ(char* buf,unsigned int ByteNum){memset(data_,0,max_length);memcpy(data_,buf,Length);socket_.async_read_some(boost::asio::buffer(data_,Length),  boost::bind(&session::handle_read, this,boost::asio::placeholders::error,boost::asio::placeholders::bytes_transferred));}void session::WRITE(char *buf,unsigned int ByteNum){memset(data_,0,max_length);memcpy(data_,buf,Length);    boost::asio::async_write(socket_,        boost::asio::buffer(data_, Length),        boost::bind(&session::handle_write, this,          boost::asio::placeholders::error));}