Boost Asio multi-threaded blocking server/client

Server

 

 // blocking_server.cpp //#include "stdafx.h"#include "blocking_server.h"#include <boost/asio.hpp>#include <boost/shared_ptr.hpp>#include <boost/thread.hpp>#include <boost/bind.hpp>#include <boost/lexical_cast.hpp>#include <sstream>using namespace std;using boost::asio::ip::tcp;typedef boost::shared_ptr<tcp::socket> socket_ptr;void send_data(socket_ptr sock){// can not do this in async mode,// for(...){ async_write(...) }for(int i = 1; i <= 100; i++){string str = boost::lexical_cast<string>(i) + "/n";boost::asio::write(*sock, boost::asio::buffer(str));cout << "send data: " << str << endl;boost::this_thread::sleep(boost::posix_time::seconds(1));}boost::asio::write(*sock, boost::asio::buffer("done/n"));cout << "send done. " << endl;}void start_session(socket_ptr sock){try{cout << "accept a new connection. " << endl;boost::asio::streambuf abuf;size_t count = boost::asio::read_until(*sock, abuf, '/n');istream is(&abuf);string line;std::getline(is, line);if(line == "request_data"){cout << "receive request, sending data." << endl;send_data(sock);}}catch (std::exception &e){cout << "Exception in session: " << e.what() << endl;}}void start_server(boost::asio::io_service &ios, short port){tcp::acceptor a(ios, tcp::endpoint(tcp::v4(), port));cout << "start server, port = " << port << endl;for(;;){socket_ptr sock(new tcp::socket(ios));a.accept(*sock);boost::thread t(boost::bind(start_session, sock));}}int _tmain(int argc, TCHAR* argv[], TCHAR* envp[]){int nRetCode = 0;try{boost::asio::io_service ios;start_server(ios, 12345);}catch(std::exception &e){cout << "Exception in main: " << e.what() << endl;}return nRetCode;}

 

 

Client

 

 // blocking_client.cpp//#include "stdafx.h"#include "blocking_client.h"#include <boost/asio.hpp>#include <boost/thread.hpp>#include <boost/bind.hpp>#include <iostream>using namespace std;using namespace boost::asio;using boost::asio::ip::tcp;void handle_data(string data){cout << "get " << data << endl;}void start_connection(string ip, short port){boost::asio::io_service ios;tcp::socket client(ios);tcp::endpoint ep(ip::address_v4::from_string(ip), port);boost::system::error_code ec;client.connect(ep, ec);if(ec){cout << "fail to connect " << ip << ":" << port << endl;return;}boost::asio::streambuf abuf;istream is(&abuf);boost::asio::write(client, boost::asio::buffer("request_data/n"));while(true){boost::system::error_code ec;size_t count = boost::asio::read_until(client, abuf, '/n', ec);if(ec){//cout << "read error." << endl;}else{string line;std::getline(is, line);handle_data(line);}}}int _tmain(int argc, TCHAR* argv[], TCHAR* envp[]){int nRetCode = 0;boost::thread t(boost::bind(start_connection, "127.0.0.1", 12345));t.join();system("pause");return nRetCode;}

 

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