api.coffee

   1 fs = require 'fs'
   2 http = require 'http'
   3 crypto = require 'crypto'
   4 xml = require 'node-xml'
   5
   6 # soooo annoying that setTimeout takes the ms arg last
   7 timeout = (ms, func) -> setTimeout func, ms
   8
   9 auth = {}
  10
  11 md5 = (str) ->
  12         sum = crypto.createHash 'md5'
  13         sum.update str
  14         return sum.digest 'hex'
  15
  16 new_auth_token = (user, pass) ->
  17         token = md5(user + md5(pass))
  18         auth.user = user
  19         auth.token = token
  20         return token
  21
  22 auth_file = "#{process.env.HOME}/.libre.fm-cmus.auth"
  23 save_auth = (user, pass, callback) ->
  24         token = new_auth_token(user, pass)
  25         text = JSON.stringify user: user, token: new_auth_token(user, pass)
  26         fs.writeFile auth_file, text, 'utf8', callback
  27         return token
  28
  29 # load login credentials from settings file
  30 load_auth = (callback) ->
  31         if auth.user and auth.token
  32                 callback auth
  33                 return
  34
  35         fs.readFile auth_file, 'utf8', (err, data) ->
  36                 if err
  37                         callback err
  38                 else
  39                         callback null, JSON.parse data
  40
  41 # login and get a session key
  42 login = (callback) ->
  43         load_auth (err, auth) ->
  44                 return callback(err) if err?
  45
  46                 http.get { host: 'alpha.libre.fm', port: 80, path: "/2.0/?method=auth.getmobilesession&username=#{auth.user}&authToken=#{auth.token}"}, (res) ->
  47                         if res.statusCode != 200
  48                                 console.log "login response code: #{res.statusCode}"
  49                                 callback "login response code: #{res.statusCode}"
  50                                 return
  51
  52                         res.setEncoding 'utf8'
  53                         body = ''
  54                         res.on 'data', (chunk) ->
  55                                 body += chunk
  56                         res.on 'end', ->
  57                                 element = ''
  58                                 content = ''
  59                                 done = false
  60                                 huh = ->
  61                                         # FIXME switch to an xml parser that will tell me when it's done
  62                                         unless done
  63                                                 done = true
  64                                                 callback "xml parser failed to do anything with login server response"
  65                                                 console.log "xml parser didn't exit: #{body}"
  66                                 parser = new xml.SaxParser (cb) ->
  67                                         cb.onStartElementNS (name, attrs, prefix, uri, namespaces) ->
  68                                                 element = name
  69                                                 content = ''
  70                                         cb.onCharacters (str) ->
  71                                                 content += str
  72                                         cb.onEndElementNS (name, attrs, prefix, uri, namespaces) ->
  73                                                 if element is 'key'
  74                                                         done = true
  75                                                         auth.sk = content
  76                                                         console.log("got key \"#{content}\"")
  77                                                         callback null, content
  78                                                 else if element is 'error'
  79                                                         done = true
  80                                                         callback "login failed: \"#{content}\""
  81                                                 # ignore other tags stuff in there
  82                                         cb.onEndDocument huh
  83                                 parser.parseString body
  84                                 timeout 1, huh
  85
  86
  87 exports.login = login # fixme remove this from the API and call it automatically
  88 exports.new_auth_token = new_auth_token
  89 exports.save_auth = save_auth