[Boost-users] Boost::Asio read_until and streambuf usage

Subject: [Boost-users] Boost::Asio read_until and streambuf usage
From: Gonzalo Garramuno (ggarra13_at_[hidden])
Date: 2012-11-21 12:11:35

I have a server that sends three lines, each of which have to be parsed 
independently.
I am using read_until but have a problem with its usage.  When 
read_until reads once, the streambuf seems to contain the three lines 
but not in the istream and only when I call read_until several times, I 
get the lines.
I am wondering how can I safely read_until the buffer is empty (the 3 or 
more lines are read) and then exit the loop.

       boost::asio::streambuf buf;

       while( 1 )

       {
          size_t reply_length = boost::asio::read_until( socket_,
                                                                buf, '\n' );

         std::istream is(&buf);
         std::string reply;
         std::getline(is, reply);  // only 1 line obtained

       }