From: Bob Showalter <bob_showalter@...>
Date: 2005-12-21T05:16:38+09:00
Subject: Re: Difficulty opening a socket

mr ra88it wrote:
> Thanks, everyone.
> 
> Like I said, I know nothing about sockets and realize now I probably
> should have asked this question elsewhere. 

It's fine. We just couldn't figure out what you're tying to do.

> I wasn't trying to do anything except send data over some sockets with
> ruby. Just playing.

You need to go ahead and write a simple server and a client.

Here's a simple "echo" server, that reads lines from the client and 
sends them back:

   require 'socket'
   sock = TCPServer.new(7777)
   while client = sock.accept
     puts "Connection received from #{client.peeraddr.inspect}"
     while s = client.gets
       client.puts s
     end
     puts "Connection from #{client.peeraddr.inspect} terminated"
   end

Here's a client to test the server:

   require 'socket'
   server = TCPSocket.new('localhost', 7777)
   server.puts "Hello!"
   puts "Server says: #{server.gets}"
   server.close

Start the server in one window. Then go to another window and run the 
server.

You can also exercise your server with telnet:

   telnet localhost 7777

Lines that you type will be echoed back by the server. (From telnet, you 
close the connection by typing the telnet "escape" character, often ^], 
and then typing "close")