source: EcnlProtoTool/trunk/prototool/src/echo_server.rb@ 279

port = if ARGV[0] then ARGV[0] else 'echo' end
gate = TCPServer.open(port)

sock = gate.accept
gate.close

while msg = sock.gets
        sock.write(msg)
        print("you get:", msg)
end
sock.close