server/lib/friends.js

   1 'use strict'
   2
   3 const each = require('async/each')
   4 const eachLimit = require('async/eachLimit')
   5 const eachSeries = require('async/eachSeries')
   6 const request = require('request')
   7 const waterfall = require('async/waterfall')
   8
   9 const constants = require('../initializers/constants')
  10 const db = require('../initializers/database')
  11 const logger = require('../helpers/logger')
  12 const peertubeCrypto = require('../helpers/peertube-crypto')
  13 const requests = require('../helpers/requests')
  14
  15 const ENDPOINT_ACTIONS = constants.REQUEST_ENDPOINT_ACTIONS[constants.REQUEST_ENDPOINTS.VIDEOS]
  16
  17 const friends = {
  18   addVideoToFriends,
  19   updateVideoToFriends,
  20   reportAbuseVideoToFriend,
  21   hasFriends,
  22   makeFriends,
  23   quitFriends,
  24   removeVideoToFriends,
  25   sendOwnedVideosToPod
  26 }
  27
  28 function addVideoToFriends (videoData, transaction, callback) {
  29   const options = {
  30     type: ENDPOINT_ACTIONS.ADD,
  31     endpoint: constants.REQUEST_ENDPOINTS.VIDEOS,
  32     data: videoData,
  33     transaction
  34   }
  35   createRequest(options, callback)
  36 }
  37
  38 function updateVideoToFriends (videoData, transaction, callback) {
  39   const options = {
  40     type: ENDPOINT_ACTIONS.UPDATE,
  41     endpoint: constants.REQUEST_ENDPOINTS.VIDEOS,
  42     data: videoData,
  43     transaction
  44   }
  45   createRequest(options, callback)
  46 }
  47
  48 function removeVideoToFriends (videoParams) {
  49   const options = {
  50     type: ENDPOINT_ACTIONS.REMOVE,
  51     endpoint: constants.REQUEST_ENDPOINTS.VIDEOS,
  52     data: videoParams
  53   }
  54   createRequest(options)
  55 }
  56
  57 function reportAbuseVideoToFriend (reportData, video) {
  58   const options = {
  59     type: ENDPOINT_ACTIONS.REPORT_ABUSE,
  60     endpoint: constants.REQUEST_ENDPOINTS.VIDEOS,
  61     data: reportData,
  62     toIds: [ video.Author.podId ]
  63   }
  64   createRequest(options)
  65 }
  66
  67 function hasFriends (callback) {
  68   db.Pod.countAll(function (err, count) {
  69     if (err) return callback(err)
  70
  71     const hasFriends = (count !== 0)
  72     callback(null, hasFriends)
  73   })
  74 }
  75
  76 function makeFriends (hosts, callback) {
  77   const podsScore = {}
  78
  79   logger.info('Make friends!')
  80   peertubeCrypto.getMyPublicCert(function (err, cert) {
  81     if (err) {
  82       logger.error('Cannot read public cert.')
  83       return callback(err)
  84     }
  85
  86     eachSeries(hosts, function (host, callbackEach) {
  87       computeForeignPodsList(host, podsScore, callbackEach)
  88     }, function (err) {
  89       if (err) return callback(err)
  90
  91       logger.debug('Pods scores computed.', { podsScore: podsScore })
  92       const podsList = computeWinningPods(hosts, podsScore)
  93       logger.debug('Pods that we keep.', { podsToKeep: podsList })
  94
  95       makeRequestsToWinningPods(cert, podsList, callback)
  96     })
  97   })
  98 }
  99
 100 function quitFriends (callback) {
 101   // Stop pool requests
 102   db.Request.deactivate()
 103
 104   waterfall([
 105     function flushRequests (callbackAsync) {
 106       db.Request.flush(callbackAsync)
 107     },
 108
 109     function getPodsList (callbackAsync) {
 110       return db.Pod.list(callbackAsync)
 111     },
 112
 113     function announceIQuitMyFriends (pods, callbackAsync) {
 114       const requestParams = {
 115         method: 'POST',
 116         path: '/api/' + constants.API_VERSION + '/pods/remove',
 117         sign: true
 118       }
 119
 120       // Announce we quit them
 121       // We don't care if the request fails
 122       // The other pod will exclude us automatically after a while
 123       eachLimit(pods, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) {
 124         requestParams.toPod = pod
 125         requests.makeSecureRequest(requestParams, callbackEach)
 126       }, function (err) {
 127         if (err) {
 128           logger.error('Some errors while quitting friends.', { err: err })
 129           // Don't stop the process
 130         }
 131
 132         return callbackAsync(null, pods)
 133       })
 134     },
 135
 136     function removePodsFromDB (pods, callbackAsync) {
 137       each(pods, function (pod, callbackEach) {
 138         pod.destroy().asCallback(callbackEach)
 139       }, callbackAsync)
 140     }
 141   ], function (err) {
 142     // Don't forget to re activate the scheduler, even if there was an error
 143     db.Request.activate()
 144
 145     if (err) return callback(err)
 146
 147     logger.info('Removed all remote videos.')
 148     return callback(null)
 149   })
 150 }
 151
 152 function sendOwnedVideosToPod (podId) {
 153   db.Video.listOwnedAndPopulateAuthorAndTags(function (err, videosList) {
 154     if (err) {
 155       logger.error('Cannot get the list of videos we own.')
 156       return
 157     }
 158
 159     videosList.forEach(function (video) {
 160       video.toAddRemoteJSON(function (err, remoteVideo) {
 161         if (err) {
 162           logger.error('Cannot convert video to remote.', { error: err })
 163           // Don't break the process
 164           return
 165         }
 166
 167         const options = {
 168           type: 'add',
 169           endpoint: constants.REQUEST_ENDPOINTS.VIDEOS,
 170           data: remoteVideo,
 171           toIds: [ podId ]
 172         }
 173         createRequest(options)
 174       })
 175     })
 176   })
 177 }
 178
 179 // ---------------------------------------------------------------------------
 180
 181 module.exports = friends
 182
 183 // ---------------------------------------------------------------------------
 184
 185 function computeForeignPodsList (host, podsScore, callback) {
 186   getForeignPodsList(host, function (err, res) {
 187     if (err) return callback(err)
 188
 189     const foreignPodsList = res.data
 190
 191     // Let's give 1 point to the pod we ask the friends list
 192     foreignPodsList.push({ host })
 193
 194     foreignPodsList.forEach(function (foreignPod) {
 195       const foreignPodHost = foreignPod.host
 196
 197       if (podsScore[foreignPodHost]) podsScore[foreignPodHost]++
 198       else podsScore[foreignPodHost] = 1
 199     })
 200
 201     return callback()
 202   })
 203 }
 204
 205 function computeWinningPods (hosts, podsScore) {
 206   // Build the list of pods to add
 207   // Only add a pod if it exists in more than a half base pods
 208   const podsList = []
 209   const baseScore = hosts.length / 2
 210
 211   Object.keys(podsScore).forEach(function (podHost) {
 212     // If the pod is not me and with a good score we add it
 213     if (isMe(podHost) === false && podsScore[podHost] > baseScore) {
 214       podsList.push({ host: podHost })
 215     }
 216   })
 217
 218   return podsList
 219 }
 220
 221 function getForeignPodsList (host, callback) {
 222   const path = '/api/' + constants.API_VERSION + '/pods'
 223
 224   request.get(constants.REMOTE_SCHEME.HTTP + '://' + host + path, function (err, response, body) {
 225     if (err) return callback(err)
 226
 227     try {
 228       const json = JSON.parse(body)
 229       return callback(null, json)
 230     } catch (err) {
 231       return callback(err)
 232     }
 233   })
 234 }
 235
 236 function makeRequestsToWinningPods (cert, podsList, callback) {
 237   // Stop pool requests
 238   db.Request.deactivate()
 239   // Flush pool requests
 240   db.Request.forceSend()
 241
 242   eachLimit(podsList, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) {
 243     const params = {
 244       url: constants.REMOTE_SCHEME.HTTP + '://' + pod.host + '/api/' + constants.API_VERSION + '/pods/',
 245       method: 'POST',
 246       json: {
 247         host: constants.CONFIG.WEBSERVER.HOST,
 248         email: constants.CONFIG.ADMIN.EMAIL,
 249         publicKey: cert
 250       }
 251     }
 252
 253     requests.makeRetryRequest(params, function (err, res, body) {
 254       if (err) {
 255         logger.error('Error with adding %s pod.', pod.host, { error: err })
 256         // Don't break the process
 257         return callbackEach()
 258       }
 259
 260       if (res.statusCode === 200) {
 261         const podObj = db.Pod.build({ host: pod.host, publicKey: body.cert, email: body.email })
 262         podObj.save().asCallback(function (err, podCreated) {
 263           if (err) {
 264             logger.error('Cannot add friend %s pod.', pod.host, { error: err })
 265             return callbackEach()
 266           }
 267
 268           // Add our videos to the request scheduler
 269           sendOwnedVideosToPod(podCreated.id)
 270
 271           return callbackEach()
 272         })
 273       } else {
 274         logger.error('Status not 200 for %s pod.', pod.host)
 275         return callbackEach()
 276       }
 277     })
 278   }, function endRequests () {
 279     // Final callback, we've ended all the requests
 280     // Now we made new friends, we can re activate the pool of requests
 281     db.Request.activate()
 282
 283     logger.debug('makeRequestsToWinningPods finished.')
 284     return callback()
 285   })
 286 }
 287
 288 // Wrapper that populate "toIds" argument with all our friends if it is not specified
 289 // { type, endpoint, data, toIds, transaction }
 290 function createRequest (options, callback) {
 291   if (!callback) callback = function () {}
 292   if (options.toIds) return _createRequest(options, callback)
 293
 294   // If the "toIds" pods is not specified, we send the request to all our friends
 295   db.Pod.listAllIds(options.transaction, function (err, podIds) {
 296     if (err) {
 297       logger.error('Cannot get pod ids', { error: err })
 298       return
 299     }
 300
 301     const newOptions = Object.assign(options, { toIds: podIds })
 302     return _createRequest(newOptions, callback)
 303   })
 304 }
 305
 306 // { type, endpoint, data, toIds, transaction }
 307 function _createRequest (options, callback) {
 308   const type = options.type
 309   const endpoint = options.endpoint
 310   const data = options.data
 311   const toIds = options.toIds
 312   const transaction = options.transaction
 313
 314   const pods = []
 315
 316   // If there are no destination pods abort
 317   if (toIds.length === 0) return callback(null)
 318
 319   toIds.forEach(function (toPod) {
 320     pods.push(db.Pod.build({ id: toPod }))
 321   })
 322
 323   const createQuery = {
 324     endpoint,
 325     request: {
 326       type: type,
 327       data: data
 328     }
 329   }
 330
 331   const dbRequestOptions = {
 332     transaction
 333   }
 334
 335   return db.Request.create(createQuery, dbRequestOptions).asCallback(function (err, request) {
 336     if (err) return callback(err)
 337
 338     return request.setPods(pods, dbRequestOptions).asCallback(callback)
 339   })
 340 }
 341
 342 function isMe (host) {
 343   return host === constants.CONFIG.WEBSERVER.HOST
 344 }