lib/webTorrentNode.js

   1 ;(function () {
   2   'use strict'
   3
   4   var config = require('config')
   5   var ipc = require('node-ipc')
   6   var pathUtils = require('path')
   7   var spawn = require('electron-spawn')
   8
   9   var logger = require('../helpers/logger')
  10
  11   var host = config.get('webserver.host')
  12   var port = config.get('webserver.port')
  13
  14   var nodeKey = 'webtorrentnode' + port
  15   var processKey = 'webtorrent' + port
  16
  17   ipc.config.silent = true
  18   ipc.config.id = nodeKey
  19
  20   var webtorrentnode = {}
  21
  22   // Useful for beautiful tests
  23   webtorrentnode.silent = false
  24
  25   // Useful to kill it
  26   webtorrentnode.app = null
  27
  28   webtorrentnode.create = function (options, callback) {
  29     if (typeof options === 'function') {
  30       callback = options
  31       options = {}
  32     }
  33
  34     // Override options
  35     if (options.host) host = options.host
  36     if (options.port) {
  37       port = options.port
  38       nodeKey = 'webtorrentnode' + port
  39       processKey = 'webtorrent' + port
  40       ipc.config.id = nodeKey
  41     }
  42
  43     ipc.serve(function () {
  44       if (!webtorrentnode.silent) logger.info('IPC server ready.')
  45
  46       // Run a timeout of 30s after which we exit the process
  47       var timeout_webtorrent_process = setTimeout(function () {
  48         logger.error('Timeout : cannot run the webtorrent process. Please ensure you have electron-prebuilt npm package installed with xvfb-run.')
  49         process.exit()
  50       }, 30000)
  51
  52       ipc.server.on(processKey + '.ready', function () {
  53         if (!webtorrentnode.silent) logger.info('Webtorrent process ready.')
  54         clearTimeout(timeout_webtorrent_process)
  55         callback()
  56       })
  57
  58       ipc.server.on(processKey + '.exception', function (data) {
  59         logger.error('Received exception error from webtorrent process.', { exception: data.exception })
  60         process.exit()
  61       })
  62
  63       var webtorrent_process = spawn(__dirname + '/webtorrent.js', host, port, { detached: true })
  64       webtorrent_process.stderr.on('data', function (data) {
  65         // logger.debug('Webtorrent process stderr: ', data.toString())
  66       })
  67
  68       webtorrent_process.stdout.on('data', function (data) {
  69         // logger.debug('Webtorrent process:', data.toString())
  70       })
  71
  72       webtorrentnode.app = webtorrent_process
  73     })
  74
  75     ipc.server.start()
  76   }
  77
  78   webtorrentnode.seed = function (path, callback) {
  79     var extension = pathUtils.extname(path)
  80     var basename = pathUtils.basename(path, extension)
  81     var data = {
  82       _id: basename,
  83       args: {
  84         path: path
  85       }
  86     }
  87
  88     if (!webtorrentnode.silent) logger.debug('Node wants to seed %s.', data._id)
  89
  90     // Finish signal
  91     var event_key = nodeKey + '.seedDone.' + data._id
  92     ipc.server.on(event_key, function listener (received) {
  93       if (!webtorrentnode.silent) logger.debug('Process seeded torrent %s.', received.magnetUri)
  94
  95       // This is a fake object, we just use the magnetUri in this project
  96       var torrent = {
  97         magnetURI: received.magnetUri
  98       }
  99
 100       ipc.server.off(event_key)
 101       callback(torrent)
 102     })
 103
 104     ipc.server.broadcast(processKey + '.seed', data)
 105   }
 106
 107   webtorrentnode.add = function (magnetUri, callback) {
 108     var data = {
 109       _id: magnetUri,
 110       args: {
 111         magnetUri: magnetUri
 112       }
 113     }
 114
 115     if (!webtorrentnode.silent) logger.debug('Node wants to add ' + data._id)
 116
 117     // Finish signal
 118     var event_key = nodeKey + '.addDone.' + data._id
 119     ipc.server.on(event_key, function (received) {
 120       if (!webtorrentnode.silent) logger.debug('Process added torrent.')
 121
 122       // This is a fake object, we just use the magnetUri in this project
 123       var torrent = {
 124         files: received.files
 125       }
 126
 127       ipc.server.off(event_key)
 128       callback(torrent)
 129     })
 130
 131     ipc.server.broadcast(processKey + '.add', data)
 132   }
 133
 134   webtorrentnode.remove = function (magnetUri, callback) {
 135     var data = {
 136       _id: magnetUri,
 137       args: {
 138         magnetUri: magnetUri
 139       }
 140     }
 141
 142     if (!webtorrentnode.silent) logger.debug('Node wants to stop seeding %s.', data._id)
 143
 144     // Finish signal
 145     var event_key = nodeKey + '.removeDone.' + data._id
 146     ipc.server.on(event_key, function (received) {
 147       if (!webtorrentnode.silent) logger.debug('Process removed torrent %s.', data._id)
 148
 149       var err = null
 150       if (received.err) err = received.err
 151
 152       ipc.server.off(event_key)
 153       callback(err)
 154     })
 155
 156     ipc.server.broadcast(processKey + '.remove', data)
 157   }
 158
 159   module.exports = webtorrentnode
 160 })()