From: mike@... (Mike Stok)
Date: 2002-04-06T00:34:17+09:00
Subject: Re: socket question

In article <pan.2002.04.05.16.52.07.202906.16617@web.de>, Markus Jais wrote:
> hello
> 
> lets assume that I have a server on localhost which returns a string.
> but I have no control about the server and it does not to
> seem to return somethink like and EOF.  
> 
> my sample client works perfectly in Perl but has a problem
> in Ruby (and I prefer Ruby, of course)
> 
> the Perl client:
>================
> use strict;
> use IO::Socket;
> 
> my $socket = IO::Socket::INET->new('localhost:5533') or die "Error: $!\n";
> print $socket "create:10027566:drizzt\n";
> my $str = <$socket>;
> print "$str";
> close($socket);
> 
> 
> the Ruby client:
>================
> require "socket"
> port =  5533
> host = "localhost"
> 
> t = TCPSocket.new(host, port)  
> t.print("create:10027566:drizzt\n")
> t.readlines.each do |line|
>   puts line
> end
> t.close

> As you can see, I interrupted the Ruby client with Ctrl-C
> because there was no output. I thought that readlines
> would work as Perls $str = <$socket>.

Here you see perl's context dependency, <> knows that it's being used in
a scalar assignment so just slurps in a single line

I would guess that readlines is reading all the available input before
letting each iterate, so maybe the connection isn't closed.

> Any ideas how to improve the Ruby script ??

does

  t.each_line do |line|
    ...
  end

help at all?

Mike


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