echo 서버의 예제를 사용하여 boost.asio를 사용하여 tcp 서버를 프로그래밍하는 경우 들어오는 데이터를 처리하려는 내 요구 사항을 충족하도록 코드를 수정했으며 결과를 다시 보내, "socket.h"소켓 처리 클래스를 사용하고 "handler.h"파일의 데이터에 대해 다른 처리기를 만들고 싶습니다. 이제는 어떻게 문제를 해결할 수 있습니까? handler.h와 socket.h를 통해이 함수로부터 데이터를 다시 보낸다.외부 클래스의 boost :: asio :: async_write
socket.h
#include <cstdlib>
#include <iostream>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <json/json.h>
#include "handler.h"
using namespace std;
using boost::asio::ip::tcp;
class session {
public:
session(boost::asio::io_service& io_service) : socket_(io_service) {}
tcp::socket& socket() { return socket_; }
/* listen for first input data after connection established */
void start() {
socket_.async_read_some(boost::asio::buffer(data_, max_length),
boost::bind(&session::handleIncome,this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)); }
/* handle incoming data */
void handleIncome(const boost::system::error_code& error, size_t bytes_transferred) {
/* data is recieved in var data_ */
if (!error) {
/********************* Data Handler ****************************/
callHandler(data_); //this is in handler.cpp
/**************************************************************/
} else { delete this; } }
/* get more input */
void getIncome(const boost::system::error_code& error) {
if (!error) {
socket_.async_read_some(boost::asio::buffer(data_, max_length),
boost::bind(&session::handleIncome, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)); }
else { delete this; } }
/* send outcome back to client */
void sendOutcome(const std::string dout, size_t bytes_out) {
boost::asio::async_write(socket_,boost::asio::buffer(dout, bytes_out),
boost::bind(&session::getIncome, this,boost::asio::placeholders::error)); }
private:
tcp::socket socket_;
enum { max_length = 1024 };
char data_[max_length];
};
class DServer {
public:
DServer(boost::asio::io_service& io_service, short port)
:io_service_(io_service),
acceptor_(io_service, tcp::endpoint(tcp::v4(), port))
{
session* new_session = new session(io_service_);
acceptor_.async_accept(new_session->socket(),
boost::bind(&DServer::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();
new_session = new session(io_service_);
acceptor_.async_accept(new_session->socket(),boost::bind(&DServer::handle_accept, this, new_session,boost::asio::placeholders::error));}
else { delete new_session; } }
private:
boost::asio::io_service& io_service_;
tcp::acceptor acceptor_;
};
handler.cpp
void callHandler(string data) {
/* here i want to process data and after that i want to send back the result to the same client ofcourse using the function sendOutcome() in the socket.h file */
}