From: Aredridel <aredridel@...>
Date: 2004-07-24T13:13:46+09:00
Subject: Re: [Q] Is there any way to do a non-blocking TCPSocket#recv?

On Sat, 2004-07-24 at 08:14 +0900, Warren Brown wrote:
> I am trying to create a simple socket monitor program in Ruby.  The idea
> is to listen for an "inbound" connection, then open an "outbound" socket
> and forward all of the traffic both ways while logging the traffic.  In
> order to do this, I need to be able to tell if there is data available
> to receive before doing the TCPSocket#recv, since #recv blocks if there
> isn't any (instead of simply returning 0 bytes or nil). There is no
> #select method in any of the classes to test for data availability, so
> I'm stuck.  I would think this is a common thing to want to do, but
> there doesn't seem to be any way to do it using the socket library.
> What am I missing?

Use select anyway:

i,o,e = select([@insock, @outsock]) or similar.

Or use threads -- Ruby's threads use a select() call internally anyway.