boost中asio的tcp::iostream例子

#include <boost/asio.hpp>
#include <iostream>
#include <boost/foreach.hpp>
#include <string>
#include <sstream>
#include <exception>
#include <iterator>
#include <functional>
#include <algorithm>
#include <fstream>

std::string Get_Http_1_1(std::string uri)
{
  std::ostringstream request;
  request<<"GET ";
  request<<uri;
  request<<" HTTP/1.1/n";
  request<<"Connection:close /n/n";
  return request.str();
}

int main(int argc, char* argv[])
{
  try
    {   
 
      boost::asio::ip::tcp::iostream netstream("google.cn","www");    
      netstream<<Get_Http_1_1("www.google.cn/index.html")<<std::flush;
      
      std::ofstream out_file("index.html");
      netstream>>out_file.rdbuf();
      std::cout<<"receive data success"<<std::endl;
    }

  catch (const std::exception& e)
    {
      std::cout<<e.what()<<std::endl;
    }

  catch (...)
    {
      std::cout<<"unkown exception"<<std::endl;
    }
}