npinfo - showa infos about OC print server

local argv = {...}
local component = require("component")
local event = require("event")
local ser = require("serialization")
local network = require ("network")

if #argv < 1 then
  print("usage : nptest <server> <v>")
  print("Set v=true for verbose output")
  return false
end

local verbose = "false"
if argv[2] then
  verbose = argv[2]
end

if verbose == "true" then
  print("Opening connection to " .. argv[1])
end
network.tcp.open(argv[1], 9100)

local ev, msg, ch, remoteAddr, port = event.pull(3, "tcp")  -- 3 seconds time out
if ev == nil then
  print("connection timeout!")
  return false
end

if verbose == "true" then
  print("Sending data to ".. argv[1])
end

local message ={}
message["command"] = "info"
network.tcp.send(ch, ser.serialize(message))

ev, type, ch, msg, remoteAddr, port = event.pull(3, "tcp")  -- 3 seconds time out
if ev == nil then
  print("connection timeout!")
  return false
end

msgTable = ser.unserialize(msg)
if msgTable.command == "info" then
  print("Server      : " .. remoteAddr)
  print("Version     : " .. msgTable.version)
  print("Active jobs : " .. msgTable.jobs)
  print("")
end

if verbose == "true" then
  print("Closing TCP connection (ch:" .. ch .. ").")
end
network.tcp.close(ch)