使用Asio实现同步echo服务器

服务端

sync_server.h

#ifndef  ASYNC_SERVER_H
#define	 ASYNC_SERVER_H
#include <boost/asio/ip/tcp.hpp>
#include <memory>
#include <set>
#include <thread>

namespace MS {
	
	typedef std::shared_ptr<boost::asio::ip::tcp::socket> socket_ptr;
	class AsyncServer {
	public:
			AsyncServer(unsigned short);
			~AsyncServer() {}
			void listen();
			void session(socket_ptr);
	private:
			unsigned short _port;
			boost::asio::ip::tcp::acceptor _acceptor;
			std::set<std::shared_ptr<std::thread>> _connect_thread; 
	private:
		void read_message();
		void send_message();
	};
}
#endif // ! ASYNC_SERVER_H

sync_client.cpp

#include <iostream>
#include <string>
#include <boost/asio/write.hpp>
#include <boost/asio/read.hpp>

#include "async_server.h"
boost::asio::io_context IOC;
namespace MS {
	using namespace std;
	using namespace boost::asio;
	#define MAX_SZIE 1024
	
	AsyncServer::AsyncServer(unsigned short port)
	:_port{port}, 
	 _acceptor{IOC, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), _port)}
	{
		std::cout << "the server initing." << std::endl;
		this->listen();
		std::cout << "the server is running." << std::endl;
	}

	void AsyncServer::listen() {
		while(1) {
			std::cout << "listen the connection...\n";
			socket_ptr sock_{new ip::tcp::socket(IOC)};
			this->_acceptor.accept(*sock_);
			std::cout << "new connection from " << sock_->remote_endpoint().address() << std::endl;
			char data[MAX_SZIE];
			boost::system::error_code ec;
			memset(data, '\0', MAX_SZIE);
			sock_->async_read_some(boost::asio::buffer(data, MAX_SZIE), ec);
			if (ec.value() != 0) {
				std::cerr << "the async read is falie: " << ec.value() 
					      << " message: " << ec.message() << std::endl;
			}
			cout.write(data, MAX_SZIE);
			sock_->async_write_some(boost::asio::buffer(data, MAX_SZIE),ec);
			if (ec.value() != 0) {
				std::cerr << "the async send is falie: " << ec.value()
						  << " message: " << ec.message() << std::endl;
			}
			//std::thread session_thread(MS::AsyncServer::session, this, sock_);
			/*std::thread session_thread([&]() {
				this->session(sock_);
				});*/
			//session_thread.join();
			//delete session_thread;
		}
	}

	void AsyncServer::session(socket_ptr socket) {
		for(;;){
			try{
				char data[MAX_SZIE];
				memset(data, '\0', MAX_SZIE);
				boost::system::error_code error;
				size_t send_length = socket->read_some(boost::asio::buffer(data, MAX_SZIE), error);

				if(error.value() != 0){
					cerr << "read message error,code is " << error.value() << ", message is " << error.message() << endl;
					return;
				}
				cout << "write message's length is : " << send_length << endl;
				cout.write(data, MAX_SZIE);
				socket->write_some(boost::asio::buffer(data), error);

				if(error.value() != 0){
					cerr << "write message error: " << error.message() << endl;
				}
			} catch(...){
				cout << "Client disconnected" << endl;
			}
		}	
	}

	void AsyncServer::send_message() {
		
	}

	void AsyncServer::read_message() {
		
	}
}

int main() {
	try{
		IOC.run();
		MS::AsyncServer server(10086);
	} catch(std::exception &e){
		std::cerr << "Exception: " << e.what() << std::endl;
	}
}

客户端

sync_client.h

#pragma once

#include <iostream>
#include <boost/asio/ip/tcp.hpp>

namespace MC {
	class Client {
	public:
		Client(const std::string&, unsigned short);
		void connect_to_server();
		void runClient();
		void send_message();
		void receive_message();
		
	private:
		boost::asio::ip::tcp::socket _sock;
		boost::asio::ip::tcp::endpoint _remote_endpoint;	
	};
}

sync_client.cpp

#include <iostream>
#include <boost/asio/write.hpp>
#include <boost/asio/read.hpp>

#include "async_client.h"

static boost::asio::io_context IOC;
namespace MC {
	using namespace std;
	using namespace boost::asio::ip;
	#define MAX_LENGTH 1024
	
	Client::Client(const std::string& host, unsigned short port)
		:_sock{IOC}, _remote_endpoint{ address::from_string(host), port }
	{
		
		this->connect_to_server();
		this->runClient();
	}

	// connect to the server by host and port
	void Client::connect_to_server() {
		try {
			boost::system::error_code ec = boost::asio::error::host_not_found;
			_sock.connect(_remote_endpoint, ec);

			if(ec.value() != 0) {
				std::cout << "connect failed, code is " << ec.value() << " error msg is " << ec.message() << std::endl;
				return;
			}
			std::cout << "connect success!" << std::endl;
			
		}catch(...) {
			std::cout << "connect failed! system error." << std::endl;
		}
	}

	// run the client
	void Client::runClient(){
		while(true) {
			this->send_message();
			this->receive_message();
		}
	}

	// send message to server
	void Client::send_message() {
		try {
			std::string msg;
			std::cout << "Enter message: ";
			std::getline(std::cin, msg);
			boost::asio::write(_sock, boost::asio::buffer(msg));
		}catch(...) {
			std::cout << "send message failed! system error." << std::endl;
		}
	}

	void Client::receive_message() {
		try {
			char reply[MAX_LENGTH];
			size_t reply_length = boost::asio::read(_sock,
				boost::asio::buffer(reply, MAX_LENGTH));
			std::cout << "Reply is: ";
			std::cout.write(reply, reply_length);
			std::cout << "\n";
		}catch(...) {
			std::cout << "receive message failed! system error." << std::endl;
		}
	}

	
}


int main() {
	MC::Client client("127.0.0.1", 10086);
	// client.runClient();
}