Re: [Boost-users] Boost::asio - how to detect if a remotesocketsclient has disconnected

Subject: Re: [Boost-users] Boost::asio - how to detect if a remotesocketsclient has disconnected
From: Alex Black (alex_at_[hidden])
Date: 2009-07-27 13:05:29

> On Mon, Jul 27, 2009 at 10:14 AM, Alex Black<alex_at_[hidden]> wrote:
> > Would doing synchronous writes (instead of asycnchronous 
> writes) make 
> > any difference?
> 
> No.  It still needs to fill up the TCP send buffer before it 
> even considers raising any sort of error.
> 
> If one end of the connection silently drops off, the only 
> reliable way to find out is to attempt a read.

So, if I attempt a read, will I be able to distinguish between these two
scenarios:
A) the client is no longer connected
B) the client is connected but hasn't send anything since I last read
(which is the case for HTTP clients I believe)

> 
> Jon
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