Client = require 'ftp'
async = require 'async'
remote_path ='/public_html/targetfolder/'
local_path = 'data/'
fs = require 'fs'

c = new Client()
c.on 'ready', ()->
  c.list remote_path, (err, list)->
    if (err) then console.error 'list', err
    file_funcs = (getFileFunc file.name for file in list)
    async.series file_funcs, ()-> c.end()

getFileFunc = (name) ->
  (callback)->
    if /csv$/.test name
      c.get remote_path + name, (err, stream)->
        console.log 'Getting ', name
        if err then console.log 'get', err
        stream.once 'close', callback
        stream.pipe fs.createWriteStream local_path + name
    else
      console.log "Skipping", name
      callback()

c.connect(
  host : 'ftp.targethost.com'
  user : 'username@domain.com'
  password : 'password'
)