nprint client for OC print server

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

if #argv < 2 then
  print("usage : nprint <server address> <file> <v>")
  print("    set 'v' to true for output")
  return false
end
local fileName = argv[2]
local verbose = "false"
if argv[3] then
  verbose = argv[3]
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
  if verbose == "true" then
    print("connection timeout!")
  end
  return false
end

if verbose == "true" then
  print("Reading file " .. fileName)
end
local data = {}
local i = 0
local file = io.open(fileName, "r")
while true do
  line = file:read()
  if line == nil then
    break
  else
    i = i + 1
    data[i] = line
  end
end
file:close()

if verbose == "true" then
  print("Sending data to ".. argv[1])
end
local message ={}
message["command"] = "print"
message["filename"] = fileName
message["data"] = ser.serialize(data)
message["count"] = i
network.tcp.send(ch, ser.serialize(message))

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