#include <iostream>
#include <boost/asio/streambuf.hpp>
#include <boost/asio/buffer.hpp>
 
int main()
{
   /* Convert std::string to boost::asio::streambuf */
   boost::asio::streambuf sbuf;
   std::iostream os(&sbuf);
   std::string message("Teststring");
   os << message;
 
   /* Convert boost::asio::streambuf to std::string */
   std::string str((std::istreambuf_iterator<char>(&sbuf)), std::istreambuf_iterator<char>());
 
   std::cout << str << std::endl;
}
 

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