/// handle appelé après acceptation
void handle_accept(const boost::system::error_code& e, connection_ptr conn) {
if (!e) { // acceptation réussie
// lecture des informations
conn->async_read(infos, boost::bind(&server::handle_read, this, boost::asio::placeholders::error, conn));
}
// démarrage d'une nouvelle connection
connection_ptr new_conn(new connection(acceptor_.get_io_service()));
acceptor_.async_accept(new_conn->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error, new_conn));
}
void Server::async_recieve(const boost::system::error_code& e, connection_ptr conn){
conn->async_read(msg_, boost::bind(&Server::handle_read, this, boost::asio::placeholders::error, conn));
}