Synchronous Chat Client &Server

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给一个使用boost asio 同步方法的Chat客户端和服务端的做法

Synchronous Chat Client

#include <string>#include <boost/asio.hpp>using namespace std;using boost::asio::ip::tcp;int main(){boost::asio::io_service io;tcp::resolver resolver(io);tcp::resolver::query query(tcp::v4(), "127.0.0.1", "1234");tcp::resolver::iterator iterator = resolver.resolve(query);tcp::socket sock(io);boost::asio::connect(sock, iterator);for(;;){string line;HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);SetConsoleTextAttribute(handle, FOREGROUND_GREEN | FOREGROUND_INTENSITY);//input text: greencout << "[Sent] ";do{//cannot send empty messagegetline(cin, line);}while(line.empty());sock.write_some(boost::asio::buffer(line));SetConsoleTextAttribute(handle, FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY);//output text: yellowchar reply[1024];memset(reply, 0, 1024);sock.read_some(boost::asio::buffer(reply, 1024));cout << "[Recieved] " << reply << endl << endl;}return 0;}

Synchronous Chat Server

#include <iostream>#include <boost/asio.hpp>#include <boost/thread.hpp>using namespace std;using boost::asio::ip::tcp;//使用信号量保证输出不会出现截断boost::mutex mutex;void session(tcp::socket* sock){mutex.lock();cout << "Client " << sock->remote_endpoint() << " Connecting..." << endl;mutex.unlock();char data[1024];for(;;){memset(data, 0, 1024);boost::system::error_code error;size_t lenght = sock->read_some(boost::asio::buffer(data), error);mutex.lock();cout << "Client " << sock->remote_endpoint() << " Said: " << data << endl;mutex.unlock();if (error == boost::asio::error::eof)break;//connection closed cleanly by peerelse if (error){mutex.lock();cerr << "Read Error: " << error.message() << endl;mutex.unlock();break;}sock->write_some(boost::asio::buffer(data), error);if(error){mutex.lock();cerr << "Write Error: " << error.message() << endl;mutex.unlock();break;}}mutex.lock();cout << "Client " << sock->remote_endpoint() << " Over" << endl << endl;mutex.unlock();delete sock;}int main(){boost::asio::io_service io;tcp::endpoint ep(tcp::v4(), 1234);tcp::acceptor acc(io, ep);//同步方法一般是开个线程与client通信,主线程继续acceptfor(;;){tcp::socket* sock = new tcp::socket(io);acc.accept(*sock);boost::thread(&session,sock).detach();}return 0;}

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