From: me@... (Rick)
Date: 2002-11-01T13:41:13+09:00
Subject: Re: Is this the best start to ruby socket server for flash clients?

Thank you much for these your thoughts and direction. I will get the
book and rethink the approach.

In the mean time here's the latest greatest threaded approach:

It rejects users at 250 sockets on windows 2000 server and 500 sockets
on Redhat linux. This is because "default is limited to 1024 file
descriptors, this is done with proc settings" and each socket takes
two. Looking into how and if this limit should be increased.

require "socket"

@@threadsOpen = ThreadGroup.new
listenIp = "0.0.0.0"
listenPort = 1234

socket = TCPServer.new(listenIp,listenPort)
socket.setsockopt(Socket::SOL_SOCKET, Socket::TCP_NODELAY, true)
#IPPROTO_TCP for windows

while 
  thisThread = Thread.new(session = socket.accept) {|thisSession|
  lastMessage = nil
    while thisSession
      if thisSession.eof? #test if socket is closed
        puts ("session closed")
        thisSession.close
        thisThread.kill  
      else #socket is open
        fromClient = thisSession.gets("\0")
        if lastMessage != fromClient # avoid repeating previous line
          toClient = fromClient
          lastMessage = fromClient
        else
          toClient = "<heart>beat</heart>\0"
        end
        thisSession.write(toClient)
        puts (toClient)
      end
      sleep .75
    end     
  }
  @@threadsOpen.add(thisThread)
end