Re: [Boost-users] Boost.Asio -- combining sync read with async read

Subject: Re: [Boost-users] Boost.Asio -- combining sync read with async read
From: Igor R (boost.lists_at_[hidden])
Date: 2009-10-14 15:06:11

>
> However, what concerns me is if the handler receives a buffer that has just
> 2.5 lines in it. All the messages from the server are going to be one line
> long. So if the server sends three messages in succession but say there is
> some network hiccup partway through the 3rd line, then my client will only
> receive 2.5 lines, and the handler will get called with the partial line?
> Then the handler has to cache the partial line so that when the rest of the
> line comes through it can paste them together again? That seems hard...
>

Right. The most simple way to accomplish this is to use asio::streambuf as a
buffer. When you process the input data, you call consume() function only
for the amout you've really processed, and the rest of the data remains
unused in the streambuf - until the next time you get something from the
server (look at the asio examples with streambuf).