Re: How can I send many messages from a server to client in socket

From: Bob Hauck (postmaster_at_localhost.localdomain)
Date: 05/30/05 

Date: Mon, 30 May 2005 08:30:17 -0400

On 30 May 2005 04:08:39 -0700, skprasat@gmail.com <skprasat@gmail.com>
wrote:

> what i need is to send these three char array in a single send
> function...

Maybe you could try writev().

But, because your question makes me think you are about to make a common
mistake, let me point out that sending the three arrays together will
not guarantee that all three will be returned together by a read() on
the other end. TCP does not guarantee that and if you assume it does
thne you _will_ get bitten sooner or later.

Instead, you should come up with some scheme for finding the start and
end of each message. If they are always strings, a null byte or NL will
work fine. Look for that token by calling read() in a loop rather than
assuming that the read() will return your whole string in one call. 

-- 
 -| Bob Hauck
 -| A proud member of the reality-based community.
 -| http://www.haucks.org/

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