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

Subject: Re: [Boost-users] Boost.Asio -- combining sync read with async read
From: Sameer Parekh (sameer_at_[hidden])
Date: 2009-10-14 14:56:50

>
> No, it will read anything available in the socket and put it in the  
> buffer.
> It can be 1 line, 2 lines or 3.25 lines. What I mean is that you  
> have to be
> aware of the fact that the buffer might contain more data than you
> "requested" from read_until.

Aha, thanks Igor. So my handler needs to be able to deal with a buffer  
that contains more than one line. That's not so bad, I can just run  
the processing code for each line until the buffer is empty, that  
should be fine.

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...

thanks,
-s