Boost Asio 网络编程 基本用法

标签：boost asio

	boost::asio::ip::address addr;
	addr = addr.from_string("127.0.0.1");   
	assert(addr.is_v4());                   
	OutputDebugStringA(addr.to_string().c_str());  

	addr = addr.from_string("1000:0000:0000:0000:0000:1234:5678:1234");  
	assert(addr.is_v6());  
	OutputDebugStringA(addr.to_string().c_str());

boost::asio::ip::address addr;         
addr = addr.from_string("127.0.0.1");
boost::asio::ip::tcp::endpoint ep(addr, 1234); //构造一个endpoint

ep.address() 获取IP地址
ep.port() 获取端口号

头文件

#pragma once
#include <boost/asio.hpp> 
#include <boost/array.hpp> 
#include <boost/bind.hpp>
#include <string>

class CASIOClient
{
public:
	CASIOClient(const std::string & hostname,boost::asio::io_service& io_service_);
	~CASIOClient(void);

private:
	boost::asio::ip::tcp::socket m_Sock;
	boost::asio::ip::tcp::resolver m_Resolver;
	boost::array<char, 4096> buffer;

	void receive_handler(const boost::system::error_code &ec, std::size_t bytes_transferred);
	void connect_handler(const boost::system::error_code &ec); 
	void resolve_handler(const boost::system::error_code &ec, boost::asio::ip::tcp::resolver::iterator it);
};

实现文件

#include "StdAfx.h"
#include "ASIOClient.h"


CASIOClient::CASIOClient(  
	const std::string& hostname,
	boost::asio::io_service& io_service_)
	: m_Resolver(io_service_),
	m_Sock(io_service_)
	
{
	
	boost::asio::ip::tcp::resolver::query query(hostname,"http"); 
	m_Resolver.async_resolve(query,boost::bind(
		&CASIOClient::resolve_handler, 
		this,
		boost::asio::placeholders::error,
		boost::asio::placeholders::iterator));
}


CASIOClient::~CASIOClient(void)
{
}
void CASIOClient::receive_handler(const boost::system::error_code &ec, std::size_t bytes_transferred) 
{ 
	if (!ec) 
	{ 
		
		OutputDebugStringA(std::string(buffer.data(), bytes_transferred).c_str());
		m_Sock.async_read_some(boost::asio::buffer(buffer), 
			boost::bind(&CASIOClient::receive_handler,
			this,
			boost::asio::placeholders::error,
			boost::asio::placeholders::bytes_transferred)); 
	} 
} 

void CASIOClient::connect_handler(const boost::system::error_code &ec) 
{ 
	if (!ec) 
	{ 

		m_Sock.write_some(boost::asio::buffer("GET http://www.boost.org/LICENSE_1_0.txt HTTP 1.0\r\nHost:http://www.boost.org\r\n\r\n"));
		m_Sock.async_read_some(boost::asio::buffer(buffer), 
			boost::bind(&CASIOClient::receive_handler,
			this,
			boost::asio::placeholders::error,
			boost::asio::placeholders::bytes_transferred));
	} 
} 

void CASIOClient::resolve_handler(const boost::system::error_code &ec, boost::asio::ip::tcp::resolver::iterator it) 
{ 
	if (!ec) 
	{ 
	m_Sock.async_connect(*it,boost::bind(&CASIOClient::connect_handler,this, boost::asio::placeholders::error)); 

	}
}

调用

		boost::asio::io_service io_service;
		CASIOClient client("www.boost.org",io_service);
		io_service.run();

异步方式的函数前面都有async_前缀，函数参数中其中一个是回调函数

以上程序在VC2010下编译通过

Boost Asio 网络编程 基本用法

标签：boost asio

原文地址：http://blog.csdn.net/flyfish1986/article/details/43672801