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async_server_2.cpp
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116 lines (101 loc) · 2.78 KB
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//importing libraries
#include <iostream>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <memory>
class con_handler : public std::enable_shared_from_this<con_handler>
{
private:
boost::asio::ip::tcp::socket sock;
std::string msg;
enum { max_length = 10 };
char data[max_length];
public:
con_handler(boost::asio::io_service& io_service): sock(io_service){}
//socket creation
boost::asio::ip::tcp::socket& socket()
{
return sock;
}
void read()
{
sock.async_read_some(
boost::asio::buffer(data, max_length),
boost::bind(&con_handler::handle_read,
shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void write()
{
msg = data;
sock.async_write_some(
boost::asio::buffer(msg, max_length),
boost::bind(&con_handler::handle_write,
shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void handle_read(const boost::system::error_code& err, size_t bytes_transferred)
{
if (!err) {
std::cout << data << std::endl;
} else {
std::cerr << "error: " << err.message() << std::endl;
sock.close();
}
write();
}
void handle_write(const boost::system::error_code& err, size_t bytes_transferred)
{
if (err)
{
std::cerr << "error: " << err.message() << std::endl;
sock.close();
}
}
};
class Server
{
private:
boost::asio::ip::tcp::acceptor acceptor_;
boost::asio::io_service &io_service;
void start_accept()
{
// socket
std::shared_ptr<con_handler> con = std::make_shared<con_handler>(io_service);
// asynchronous accept operation and wait for a new connection.
acceptor_.async_accept(con->socket(),
boost::bind(&Server::handle_accept, this, con,
boost::asio::placeholders::error));
}
public:
//constructor for accepting connection from client
Server(boost::asio::io_service& io_service, std::string address, unsigned int port):
acceptor_(io_service, boost::asio::ip::tcp::endpoint(boost::asio::ip::make_address(address), port)),io_service(io_service)
{
start_accept();
}
void handle_accept(std::shared_ptr<con_handler> con, const boost::system::error_code& err)
{
if (!err) {
con->read();
}
start_accept();
}
};
int main(int argc, char *argv[])
{
if(argc != 3)
{
std::cout<<"Wrong parameter\n"<<"Example usage ./async_server 127.0.0.1 1234"<<std::endl;
return -1;
}
std::string address = argv[1];
unsigned int port = std::atoi(argv[2]);
boost::asio::io_service io_service;
Server server(io_service,address,port);
io_service.run();
return 0;
}