boost::asio server编程实例// boost.cpp : 定义控制台应用程序的入口点。//#include stdafx.h#include
boost::asio server编程实例
// boost.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <iostream>
using boost::asio::ip::tcp;
#define max_len 1024
class clientSession
:public boost::enable_shared_from_this<clientSession>
{
public:
clientSession(boost::asio::io_service& ioservice)
:m_socket(ioservice)
{
memset(data_,'\0',sizeof(data_));
}
~clientSession() {}
tcp::socket& socket()
{
return m_socket;
}
void start()
{
boost::asio::async_write(m_socket,
boost::asio::buffer("link successed!"),
boost::bind(&clientSession::handle_write,shared_from_this(),
boost::asio::placeholders::error));
/*async_read跟客户端一样，还是不能进入handle_read函数,如果你能找到问题所在，请告诉我，谢谢*/
// --已经解决，boost::asio::async_read(...)读取的字节长度不能大于数据流的长度，否则就会进入
// ioservice.run()线程等待，read后面的就不执行了。
//boost::asio::async_read(m_socket,boost::asio::buffer(data_,max_len),
// boost::bind(&clientSession::handle_read,shared_from_this(),
// boost::asio::placeholders::error));
//max_len可以换成较小的数字，就会发现async_read_some可以连续接收未收完的数据
m_socket.async_read_some(boost::asio::buffer(data_,max_len),
boost::bind(&clientSession::handle_read,shared_from_this(),
boost::asio::placeholders::error));
}
private:
void handle_write(const boost::system::error_code& error)
{
if(error)
{
m_socket.close();
}
}
void handle_read(const boost::system::error_code& error)
{
if(!error)
{
std::cout << data_ << std::endl;
//boost::asio::async_read(m_socket,boost::asio::buffer(data_,max_len),
// boost::bind(&clientSession::handle_read,shared_from_this(),
// boost::asio::placeholders::error));
m_socket.async_read_some(boost::asio::buffer(data_,max_len),
boost::bind(&clientSession::handle_read,shared_from_this(),
boost::asio::placeholders::error));
}
else
{
m_socket.close();
}
}
private:
tcp::socket m_socket;
char data_[max_len];
};
class serverApp
{
typedef boost::shared_ptr<clientSession> session_ptr;
public:
serverApp(boost::asio::io_service& ioservice, tcp::endpoint& endpoint)
:m_ioservice(ioservice),
acceptor_(ioservice, endpoint)
{
session_ptr new_session(new clientSession(ioservice));
acceptor_.async_accept(new_session->socket(),
boost::bind(&serverApp::handle_accept,this,boost::asio::placeholders::error,
new_session));
}
~serverApp()
{
}
private:
void handle_accept(const boost::system::error_code& error,session_ptr& session)
{
if(!error)
{
std::cout << "get a new client!" << std::endl;
//实现对每个客户端的数据处理
session->start();
//在这就应该看出为什么要封session类了吧，每一个session就是一个客户端
session_ptr new_session(new clientSession(m_ioservice));
acceptor_.async_accept(new_session->socket(),
boost::bind(&serverApp::handle_accept,this,boost::asio::placeholders::error,
new_session));
}
}
private:
boost::asio::io_service& m_ioservice;
tcp::acceptor acceptor_;
};
int main(int argc, char* argv[])
{
boost::asio::io_service myIoService;
short port = 8100/*argv[1]*/;
//我们用的是inet4
tcp::endpoint endPoint(tcp::v4(), port);
//终端（可以看作sockaddr_in）完成后，就要accept了
serverApp sa(myIoService, endPoint);
//数据收发逻辑
myIoService.run();
return 0;
}
