67 files changed, 1622 insertions, 227 deletions

diff --git a/server/controllers/activitypub/client.ts b/server/controllers/activitypub/client.ts
index 433186179..ffbf1ba19 100644
--- a/server/controllers/activitypub/client.ts
+++ b/server/controllers/activitypub/client.ts
@@ -3,17 +3,22 @@ import * as express from 'express'
 import { VideoPrivacy, VideoRateType } from '../../../shared/models/videos'
 import { activityPubCollectionPagination, activityPubContextify } from '../../helpers/activitypub'
 import { CONFIG, ROUTE_CACHE_LIFETIME } from '../../initializers'
-import { buildAnnounceWithVideoAudience } from '../../lib/activitypub/send'
+import { buildAnnounceWithVideoAudience, buildDislikeActivity, buildLikeActivity } from '../../lib/activitypub/send'
 import { audiencify, getAudience } from '../../lib/activitypub/audience'
 import { buildCreateActivity } from '../../lib/activitypub/send/send-create'
 import {
   asyncMiddleware,
+  videosShareValidator,
   executeIfActivityPub,
   localAccountValidator,
   localVideoChannelValidator,
   videosCustomGetValidator
 } from '../../middlewares'
-import { videoCommentGetValidator, videosGetValidator, videosShareValidator } from '../../middlewares/validators'
+import {
+  getAccountVideoRateValidator,
+  videoCommentGetValidator,
+  videosGetValidator
+} from '../../middlewares/validators'
 import { AccountModel } from '../../models/account/account'
 import { ActorModel } from '../../models/activitypub/actor'
 import { ActorFollowModel } from '../../models/activitypub/actor-follow'
@@ -25,6 +30,7 @@ import { cacheRoute } from '../../middlewares/cache'
 import { activityPubResponse } from './utils'
 import { AccountVideoRateModel } from '../../models/account/account-video-rate'
 import {
+  getRateUrl,
   getVideoCommentsActivityPubUrl,
   getVideoDislikesActivityPubUrl,
   getVideoLikesActivityPubUrl,
@@ -48,6 +54,14 @@ activityPubClientRouter.get('/accounts?/:name/following',
   executeIfActivityPub(asyncMiddleware(localAccountValidator)),
   executeIfActivityPub(asyncMiddleware(accountFollowingController))
 )
+activityPubClientRouter.get('/accounts?/:name/likes/:videoId',
+  executeIfActivityPub(asyncMiddleware(getAccountVideoRateValidator('like'))),
+  executeIfActivityPub(getAccountVideoRate('like'))
+)
+activityPubClientRouter.get('/accounts?/:name/dislikes/:videoId',
+  executeIfActivityPub(asyncMiddleware(getAccountVideoRateValidator('dislike'))),
+  executeIfActivityPub(getAccountVideoRate('dislike'))
+)
 
 activityPubClientRouter.get('/videos/watch/:id',
   executeIfActivityPub(asyncMiddleware(cacheRoute(ROUTE_CACHE_LIFETIME.ACTIVITY_PUB.VIDEOS))),
@@ -62,7 +76,7 @@ activityPubClientRouter.get('/videos/watch/:id/announces',
   executeIfActivityPub(asyncMiddleware(videosCustomGetValidator('only-video'))),
   executeIfActivityPub(asyncMiddleware(videoAnnouncesController))
 )
-activityPubClientRouter.get('/videos/watch/:id/announces/:accountId',
+activityPubClientRouter.get('/videos/watch/:id/announces/:actorId',
   executeIfActivityPub(asyncMiddleware(videosShareValidator)),
   executeIfActivityPub(asyncMiddleware(videoAnnounceController))
 )
@@ -133,6 +147,20 @@ async function accountFollowingController (req: express.Request, res: express.Re
   return activityPubResponse(activityPubContextify(activityPubResult), res)
 }
 
+function getAccountVideoRate (rateType: VideoRateType) {
+  return (req: express.Request, res: express.Response) => {
+    const accountVideoRate: AccountVideoRateModel = res.locals.accountVideoRate
+
+    const byActor = accountVideoRate.Account.Actor
+    const url = getRateUrl(rateType, byActor, accountVideoRate.Video)
+    const APObject = rateType === 'like'
+      ? buildLikeActivity(url, byActor, accountVideoRate.Video)
+      : buildCreateActivity(url, byActor, buildDislikeActivity(url, byActor, accountVideoRate.Video))
+
+    return activityPubResponse(activityPubContextify(APObject), res)
+  }
+}
+
 async function videoController (req: express.Request, res: express.Response, next: express.NextFunction) {
   const video: VideoModel = res.locals.video
 
@@ -276,7 +304,7 @@ function videoRates (req: express.Request, rateType: VideoRateType, video: Video
     const result = await AccountVideoRateModel.listAndCountAccountUrlsByVideoId(rateType, video.id, start, count)
     return {
       total: result.count,
-      data: result.rows.map(r => r.Account.Actor.url)
+      data: result.rows.map(r => r.url)
     }
   }
   return activityPubCollectionPagination(url, handler, req.query.page)
diff --git a/server/controllers/activitypub/inbox.ts b/server/controllers/activitypub/inbox.ts
index 738d155eb..f0e65015b 100644
--- a/server/controllers/activitypub/inbox.ts
+++ b/server/controllers/activitypub/inbox.ts
@@ -43,11 +43,13 @@ export {
 // ---------------------------------------------------------------------------
 
 const inboxQueue = queue<{ activities: Activity[], signatureActor?: ActorModel, inboxActor?: ActorModel }, Error>((task, cb) => {
-  processActivities(task.activities, task.signatureActor, task.inboxActor)
+  const options = { signatureActor: task.signatureActor, inboxActor: task.inboxActor }
+
+  processActivities(task.activities, options)
     .then(() => cb())
 })
 
-function inboxController (req: express.Request, res: express.Response, next: express.NextFunction) {
+function inboxController (req: express.Request, res: express.Response) {
   const rootActivity: RootActivity = req.body
   let activities: Activity[] = []
 
diff --git a/server/controllers/api/videos/index.ts b/server/controllers/api/videos/index.ts
index 664154406..e654bdd09 100644
--- a/server/controllers/api/videos/index.ts
+++ b/server/controllers/api/videos/index.ts
@@ -405,7 +405,11 @@ async function viewVideo (req: express.Request, res: express.Response) {
 
   const serverActor = await getServerActor()
 
-  await sendCreateView(serverActor, videoInstance, undefined)
+  // Send the event to the origin server
+  // If we own the video, we'll send an update event when we'll process the views (in our job queue)
+  if (videoInstance.isOwned() === false) {
+    await sendCreateView(serverActor, videoInstance, undefined)
+  }
 
   return res.status(204).end()
 }
diff --git a/server/controllers/api/videos/rate.ts b/server/controllers/api/videos/rate.ts
index dc322bb0c..53952a0a2 100644
--- a/server/controllers/api/videos/rate.ts
+++ b/server/controllers/api/videos/rate.ts
@@ -2,8 +2,8 @@ import * as express from 'express'
 import { UserVideoRateUpdate } from '../../../../shared'
 import { logger } from '../../../helpers/logger'
 import { sequelizeTypescript, VIDEO_RATE_TYPES } from '../../../initializers'
-import { sendVideoRateChange } from '../../../lib/activitypub'
-import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoRateValidator } from '../../../middlewares'
+import { getRateUrl, sendVideoRateChange } from '../../../lib/activitypub'
+import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoUpdateRateValidator } from '../../../middlewares'
 import { AccountModel } from '../../../models/account/account'
 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
 import { VideoModel } from '../../../models/video/video'
@@ -12,7 +12,7 @@ const rateVideoRouter = express.Router()
 
 rateVideoRouter.put('/:id/rate',
   authenticate,
-  asyncMiddleware(videoRateValidator),
+  asyncMiddleware(videoUpdateRateValidator),
   asyncRetryTransactionMiddleware(rateVideo)
 )
 
@@ -28,11 +28,12 @@ async function rateVideo (req: express.Request, res: express.Response) {
   const body: UserVideoRateUpdate = req.body
   const rateType = body.rating
   const videoInstance: VideoModel = res.locals.video
+  const userAccount: AccountModel = res.locals.oauth.token.User.Account
 
   await sequelizeTypescript.transaction(async t => {
     const sequelizeOptions = { transaction: t }
 
-    const accountInstance = await AccountModel.load(res.locals.oauth.token.User.Account.id, t)
+    const accountInstance = await AccountModel.load(userAccount.id, t)
     const previousRate = await AccountVideoRateModel.load(accountInstance.id, videoInstance.id, t)
 
     let likesToIncrement = 0
@@ -44,20 +45,22 @@ async function rateVideo (req: express.Request, res: express.Response) {
     // There was a previous rate, update it
     if (previousRate) {
       // We will remove the previous rate, so we will need to update the video count attribute
-      if (previousRate.type === VIDEO_RATE_TYPES.LIKE) likesToIncrement--
-      else if (previousRate.type === VIDEO_RATE_TYPES.DISLIKE) dislikesToIncrement--
+      if (previousRate.type === 'like') likesToIncrement--
+      else if (previousRate.type === 'dislike') dislikesToIncrement--
 
       if (rateType === 'none') { // Destroy previous rate
         await previousRate.destroy(sequelizeOptions)
       } else { // Update previous rate
         previousRate.type = rateType
+        previousRate.url = getRateUrl(rateType, userAccount.Actor, videoInstance)
         await previousRate.save(sequelizeOptions)
       }
     } else if (rateType !== 'none') { // There was not a previous rate, insert a new one if there is a rate
       const query = {
         accountId: accountInstance.id,
         videoId: videoInstance.id,
-        type: rateType
+        type: rateType,
+        url: getRateUrl(rateType, userAccount.Actor, videoInstance)
       }
 
       await AccountVideoRateModel.create(query, sequelizeOptions)
diff --git a/server/helpers/activitypub.ts b/server/helpers/activitypub.ts
index 278010e78..4bf6e387d 100644
--- a/server/helpers/activitypub.ts
+++ b/server/helpers/activitypub.ts
@@ -6,6 +6,7 @@ import { ACTIVITY_PUB } from '../initializers'
 import { ActorModel } from '../models/activitypub/actor'
 import { signJsonLDObject } from './peertube-crypto'
 import { pageToStartAndCount } from './core-utils'
+import { parse } from 'url'
 
 function activityPubContextify <T> (data: T) {
   return Object.assign(data, {
@@ -24,7 +25,7 @@ function activityPubContextify <T> (data: T) {
         sensitive: 'as:sensitive',
         language: 'sc:inLanguage',
         views: 'sc:Number',
-        stats: 'sc:Number',
+        state: 'sc:Number',
         size: 'sc:Number',
         fps: 'sc:Number',
         commentsEnabled: 'sc:Boolean',
@@ -111,9 +112,17 @@ function getActorUrl (activityActor: string | ActivityPubActor) {
   return activityActor.id
 }
 
+function checkUrlsSameHost (url1: string, url2: string) {
+  const idHost = parse(url1).host
+  const actorHost = parse(url2).host
+
+  return idHost && actorHost && idHost.toLowerCase() === actorHost.toLowerCase()
+}
+
 // ---------------------------------------------------------------------------
 
 export {
+  checkUrlsSameHost,
   getActorUrl,
   activityPubContextify,
   activityPubCollectionPagination,
diff --git a/server/helpers/custom-jsonld-signature.ts b/server/helpers/custom-jsonld-signature.ts
index e4f28018e..27a187db1 100644
--- a/server/helpers/custom-jsonld-signature.ts
+++ b/server/helpers/custom-jsonld-signature.ts
@@ -1,5 +1,5 @@
 import * as AsyncLRU from 'async-lru'
-import * as jsonld from 'jsonld/'
+import * as jsonld from 'jsonld'
 import * as jsig from 'jsonld-signatures'
 
 const nodeDocumentLoader = jsonld.documentLoaders.node()
@@ -17,4 +17,4 @@ jsonld.documentLoader = (url, cb) => {
 
 jsig.use('jsonld', jsonld)
 
-export { jsig }
+export { jsig, jsonld }
diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index a108d46a0..8b9045038 100644
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -310,6 +310,7 @@ async function presetH264 (command: ffmpeg.FfmpegCommand, resolution: VideoResol
     .outputOption('-level 3.1') // 3.1 is the minimal ressource allocation for our highest supported resolution
     .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorythm, 16 is optimal B-frames for it
     .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16
+    .outputOption('-pix_fmt yuv420p') // allows import of source material with incompatible pixel formats (e.g. MJPEG video)
     .outputOption('-map_metadata -1') // strip all metadata
     .outputOption('-movflags faststart')
 
diff --git a/server/helpers/peertube-crypto.ts b/server/helpers/peertube-crypto.ts
index 8ef7b1359..ab9ec077e 100644
--- a/server/helpers/peertube-crypto.ts
+++ b/server/helpers/peertube-crypto.ts
@@ -1,9 +1,12 @@
 import { Request } from 'express'
 import { BCRYPT_SALT_SIZE, HTTP_SIGNATURE, PRIVATE_RSA_KEY_SIZE } from '../initializers'
 import { ActorModel } from '../models/activitypub/actor'
-import { bcryptComparePromise, bcryptGenSaltPromise, bcryptHashPromise, createPrivateKey, getPublicKey } from './core-utils'
-import { jsig } from './custom-jsonld-signature'
+import { bcryptComparePromise, bcryptGenSaltPromise, bcryptHashPromise, createPrivateKey, getPublicKey, sha256 } from './core-utils'
+import { jsig, jsonld } from './custom-jsonld-signature'
 import { logger } from './logger'
+import { cloneDeep } from 'lodash'
+import { createVerify } from 'crypto'
+import { buildDigest } from '../lib/job-queue/handlers/utils/activitypub-http-utils'
 
 const httpSignature = require('http-signature')
 
@@ -30,21 +33,36 @@ async function cryptPassword (password: string) {
 
 // HTTP Signature
 
-function isHTTPSignatureVerified (httpSignatureParsed: any, actor: ActorModel) {
+function isHTTPSignatureDigestValid (rawBody: Buffer, req: Request): boolean {
+  if (req.headers[HTTP_SIGNATURE.HEADER_NAME] && req.headers['digest']) {
+    return buildDigest(rawBody.toString()) === req.headers['digest']
+  }
+
+  return true
+}
+
+function isHTTPSignatureVerified (httpSignatureParsed: any, actor: ActorModel): boolean {
   return httpSignature.verifySignature(httpSignatureParsed, actor.publicKey) === true
 }
 
-function parseHTTPSignature (req: Request) {
-  return httpSignature.parse(req, { authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME })
+function parseHTTPSignature (req: Request, clockSkew?: number) {
+  return httpSignature.parse(req, { authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME, clockSkew })
 }
 
 // JSONLD
 
-function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any) {
+async function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any): Promise<boolean> {
+  if (signedDocument.signature.type === 'RsaSignature2017') {
+    // Mastodon algorithm
+    const res = await isJsonLDRSA2017Verified(fromActor, signedDocument)
+    // Success? If no, try with our library
+    if (res === true) return true
+  }
+
   const publicKeyObject = {
     '@context': jsig.SECURITY_CONTEXT_URL,
     id: fromActor.url,
-    type:  'CryptographicKey',
+    type: 'CryptographicKey',
     owner: fromActor.url,
     publicKeyPem: fromActor.publicKey
   }
@@ -69,6 +87,44 @@ function isJsonLDSignatureVerified (fromActor: ActorModel, signedDocument: any)
              })
 }
 
+// Backward compatibility with "other" implementations
+async function isJsonLDRSA2017Verified (fromActor: ActorModel, signedDocument: any) {
+  function hash (obj: any): Promise<any> {
+    return jsonld.promises
+                 .normalize(obj, {
+                   algorithm: 'URDNA2015',
+                   format: 'application/n-quads'
+                 })
+                 .then(res => sha256(res))
+  }
+
+  const signatureCopy = cloneDeep(signedDocument.signature)
+  Object.assign(signatureCopy, {
+    '@context': [
+      'https://w3id.org/security/v1',
+      { RsaSignature2017: 'https://w3id.org/security#RsaSignature2017' }
+    ]
+  })
+  delete signatureCopy.type
+  delete signatureCopy.id
+  delete signatureCopy.signatureValue
+
+  const docWithoutSignature = cloneDeep(signedDocument)
+  delete docWithoutSignature.signature
+
+  const [ documentHash, optionsHash ] = await Promise.all([
+    hash(docWithoutSignature),
+    hash(signatureCopy)
+  ])
+
+  const toVerify = optionsHash + documentHash
+
+  const verify = createVerify('RSA-SHA256')
+  verify.update(toVerify, 'utf8')
+
+  return verify.verify(fromActor.publicKey, signedDocument.signature.signatureValue, 'base64')
+}
+
 function signJsonLDObject (byActor: ActorModel, data: any) {
   const options = {
     privateKeyPem: byActor.privateKey,
@@ -82,6 +138,7 @@ function signJsonLDObject (byActor: ActorModel, data: any) {
 // ---------------------------------------------------------------------------
 
 export {
+  isHTTPSignatureDigestValid,
   parseHTTPSignature,
   isHTTPSignatureVerified,
   isJsonLDSignatureVerified,
diff --git a/server/helpers/requests.ts b/server/helpers/requests.ts
index ee9e80404..51facc9e0 100644
--- a/server/helpers/requests.ts
+++ b/server/helpers/requests.ts
@@ -3,7 +3,7 @@ import { createWriteStream } from 'fs-extra'
 import * as request from 'request'
 import { ACTIVITY_PUB } from '../initializers'
 
-function doRequest (
+function doRequest <T> (
   requestOptions: request.CoreOptions & request.UriOptions & { activityPub?: boolean }
 ): Bluebird<{ response: request.RequestResponse, body: any }> {
   if (requestOptions.activityPub === true) {
@@ -11,7 +11,7 @@ function doRequest (
     requestOptions.headers['accept'] = ACTIVITY_PUB.ACCEPT_HEADER
   }
 
-  return new Bluebird<{ response: request.RequestResponse, body: any }>((res, rej) => {
+  return new Bluebird<{ response: request.RequestResponse, body: T }>((res, rej) => {
     request(requestOptions, (err, response, body) => err ? rej(err) : res({ response, body }))
   })
 }
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 28d51068b..ae3d671bb 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -16,7 +16,7 @@ let config: IConfig = require('config')
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 285
+const LAST_MIGRATION_VERSION = 290
 
 // ---------------------------------------------------------------------------
 
@@ -336,6 +336,9 @@ const CONSTRAINTS_FIELDS = {
   VIDEOS_REDUNDANCY: {
     URL: { min: 3, max: 2000 } // Length
   },
+  VIDEO_RATES: {
+    URL: { min: 3, max: 2000 } // Length
+  },
   VIDEOS: {
     NAME: { min: 3, max: 120 }, // Length
     LANGUAGE: { min: 1, max: 10 }, // Length
@@ -535,7 +538,7 @@ const ACTIVITY_PUB_ACTOR_TYPES: { [ id: string ]: ActivityPubActorType } = {
 const HTTP_SIGNATURE = {
   HEADER_NAME: 'signature',
   ALGORITHM: 'rsa-sha256',
-  HEADERS_TO_SIGN: [ 'date', 'host', 'digest', '(request-target)' ]
+  HEADERS_TO_SIGN: [ '(request-target)', 'host', 'date', 'digest' ]
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/initializers/migrations/0290-account-video-rate-url.ts b/server/initializers/migrations/0290-account-video-rate-url.ts
new file mode 100644
index 000000000..bdabf2929
--- /dev/null
+++ b/server/initializers/migrations/0290-account-video-rate-url.ts
@@ -0,0 +1,46 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction,
+  queryInterface: Sequelize.QueryInterface,
+  sequelize: Sequelize.Sequelize,
+  db: any
+}): Promise<void> {
+  {
+    const data = {
+      type: Sequelize.STRING(2000),
+      allowNull: true
+    }
+
+    await utils.queryInterface.addColumn('accountVideoRate', 'url', data)
+  }
+
+  {
+    const builtUrlQuery = `SELECT "actor"."url" || '/' ||  "accountVideoRate"."type" || 's/' || "videoId" ` +
+      'FROM "accountVideoRate" ' +
+      'INNER JOIN account ON account.id = "accountVideoRate"."accountId" ' +
+      'INNER JOIN actor ON actor.id = account."actorId" ' +
+      'WHERE "base".id = "accountVideoRate".id'
+
+    const query = 'UPDATE "accountVideoRate" base SET "url" = (' + builtUrlQuery + ') WHERE "url" IS NULL'
+    await utils.sequelize.query(query)
+  }
+
+  {
+    const data = {
+      type: Sequelize.STRING(2000),
+      allowNull: false,
+      defaultValue: null
+    }
+    await utils.queryInterface.changeColumn('accountVideoRate', 'url', data)
+  }
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}
diff --git a/server/lib/activitypub/actor.ts b/server/lib/activitypub/actor.ts
index 45dd4443d..b16a00669 100644
--- a/server/lib/activitypub/actor.ts
+++ b/server/lib/activitypub/actor.ts
@@ -5,7 +5,7 @@ import * as url from 'url'
 import * as uuidv4 from 'uuid/v4'
 import { ActivityPubActor, ActivityPubActorType } from '../../../shared/models/activitypub'
 import { ActivityPubAttributedTo } from '../../../shared/models/activitypub/objects'
-import { getActorUrl } from '../../helpers/activitypub'
+import { checkUrlsSameHost, getActorUrl } from '../../helpers/activitypub'
 import { isActorObjectValid, normalizeActor } from '../../helpers/custom-validators/activitypub/actor'
 import { isActivityPubUrlValid } from '../../helpers/custom-validators/activitypub/misc'
 import { retryTransactionWrapper, updateInstanceWithAnother } from '../../helpers/database-utils'
@@ -65,8 +65,12 @@ async function getOrCreateActorAndServerAndModel (
       const accountAttributedTo = result.attributedTo.find(a => a.type === 'Person')
       if (!accountAttributedTo) throw new Error('Cannot find account attributed to video channel ' + actor.url)
 
+      if (checkUrlsSameHost(accountAttributedTo.id, actorUrl) !== true) {
+        throw new Error(`Account attributed to ${accountAttributedTo.id} does not have the same host than actor url ${actorUrl}`)
+      }
+
       try {
-        // Assert we don't recurse another time
+        // Don't recurse another time
         ownerActor = await getOrCreateActorAndServerAndModel(accountAttributedTo.id, 'all', false)
       } catch (err) {
         logger.error('Cannot get or create account attributed to video channel ' + actor.url)
@@ -297,12 +301,15 @@ async function fetchRemoteActor (actorUrl: string): Promise<{ statusCode?: numbe
   normalizeActor(requestResult.body)
 
   const actorJSON: ActivityPubActor = requestResult.body
-
   if (isActorObjectValid(actorJSON) === false) {
     logger.debug('Remote actor JSON is not valid.', { actorJSON: actorJSON })
     return { result: undefined, statusCode: requestResult.response.statusCode }
   }
 
+  if (checkUrlsSameHost(actorJSON.id, actorUrl) !== true) {
+    throw new Error('Actor url ' + actorUrl + ' has not the same host than its AP id ' + actorJSON.id)
+  }
+
   const followersCount = await fetchActorTotalItems(actorJSON.followers)
   const followingCount = await fetchActorTotalItems(actorJSON.following)
 
diff --git a/server/lib/activitypub/crawl.ts b/server/lib/activitypub/crawl.ts
index db9ce3293..1b9b14c2e 100644
--- a/server/lib/activitypub/crawl.ts
+++ b/server/lib/activitypub/crawl.ts
@@ -2,6 +2,7 @@ import { ACTIVITY_PUB, JOB_REQUEST_TIMEOUT } from '../../initializers'
 import { doRequest } from '../../helpers/requests'
 import { logger } from '../../helpers/logger'
 import * as Bluebird from 'bluebird'
+import { ActivityPubOrderedCollection } from '../../../shared/models/activitypub'
 
 async function crawlCollectionPage <T> (uri: string, handler: (items: T[]) => Promise<any> | Bluebird<any>) {
   logger.info('Crawling ActivityPub data on %s.', uri)
@@ -14,7 +15,7 @@ async function crawlCollectionPage <T> (uri: string, handler: (items: T[]) => Pr
     timeout: JOB_REQUEST_TIMEOUT
   }
 
-  const response = await doRequest(options)
+  const response = await doRequest<ActivityPubOrderedCollection<T>>(options)
   const firstBody = response.body
 
   let limit = ACTIVITY_PUB.FETCH_PAGE_LIMIT
@@ -23,7 +24,7 @@ async function crawlCollectionPage <T> (uri: string, handler: (items: T[]) => Pr
   while (nextLink && i < limit) {
     options.uri = nextLink
 
-    const { body } = await doRequest(options)
+    const { body } = await doRequest<ActivityPubOrderedCollection<T>>(options)
     nextLink = body.next
     i++
 
diff --git a/server/lib/activitypub/process/index.ts b/server/lib/activitypub/process/index.ts
index db4980a72..5466739c1 100644
--- a/server/lib/activitypub/process/index.ts
+++ b/server/lib/activitypub/process/index.ts
@@ -1,9 +1 @@
 export * from './process'
-export * from './process-accept'
-export * from './process-announce'
-export * from './process-create'
-export * from './process-delete'
-export * from './process-follow'
-export * from './process-like'
-export * from './process-undo'
-export * from './process-update'
diff --git a/server/lib/activitypub/process/process-create.ts b/server/lib/activitypub/process/process-create.ts
index cefe89db0..214e14546 100644
--- a/server/lib/activitypub/process/process-create.ts
+++ b/server/lib/activitypub/process/process-create.ts
@@ -12,6 +12,9 @@ import { getOrCreateVideoAndAccountAndChannel } from '../videos'
 import { forwardVideoRelatedActivity } from '../send/utils'
 import { Redis } from '../../redis'
 import { createOrUpdateCacheFile } from '../cache-file'
+import { immutableAssign } from '../../../tests/utils'
+import { getVideoDislikeActivityPubUrl } from '../url'
+import { VideoModel } from '../../../models/video/video'
 
 async function processCreateActivity (activity: ActivityCreate, byActor: ActorModel) {
   const activityObject = activity.object
@@ -65,9 +68,10 @@ async function processCreateDislike (byActor: ActorModel, activity: ActivityCrea
       videoId: video.id,
       accountId: byAccount.id
     }
+
     const [ , created ] = await AccountVideoRateModel.findOrCreate({
       where: rate,
-      defaults: rate,
+      defaults: immutableAssign(rate, { url: getVideoDislikeActivityPubUrl(byActor, video) }),
       transaction: t
     })
     if (created === true) await video.increment('dislikes', { transaction: t })
@@ -84,19 +88,10 @@ async function processCreateDislike (byActor: ActorModel, activity: ActivityCrea
 async function processCreateView (byActor: ActorModel, activity: ActivityCreate) {
   const view = activity.object as ViewObject
 
-  const options = {
-    videoObject: view.object,
-    fetchType: 'only-video' as 'only-video'
-  }
-  const { video } = await getOrCreateVideoAndAccountAndChannel(options)
+  const video = await VideoModel.loadByUrl(view.object)
+  if (!video || video.isOwned() === false) return
 
   await Redis.Instance.addVideoView(video.id)
-
-  if (video.isOwned()) {
-    // Don't resend the activity to the sender
-    const exceptions = [ byActor ]
-    await forwardVideoRelatedActivity(activity, undefined, exceptions, video)
-  }
 }
 
 async function processCacheFile (byActor: ActorModel, activity: ActivityCreate) {
diff --git a/server/lib/activitypub/process/process-like.ts b/server/lib/activitypub/process/process-like.ts
index f7200db61..0dca17551 100644
--- a/server/lib/activitypub/process/process-like.ts
+++ b/server/lib/activitypub/process/process-like.ts
@@ -5,6 +5,8 @@ import { AccountVideoRateModel } from '../../../models/account/account-video-rat
 import { ActorModel } from '../../../models/activitypub/actor'
 import { forwardVideoRelatedActivity } from '../send/utils'
 import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { immutableAssign } from '../../../tests/utils'
+import { getVideoDislikeActivityPubUrl, getVideoLikeActivityPubUrl } from '../url'
 
 async function processLikeActivity (activity: ActivityLike, byActor: ActorModel) {
   return retryTransactionWrapper(processLikeVideo, byActor, activity)
@@ -34,7 +36,7 @@ async function processLikeVideo (byActor: ActorModel, activity: ActivityLike) {
     }
     const [ , created ] = await AccountVideoRateModel.findOrCreate({
       where: rate,
-      defaults: rate,
+      defaults: immutableAssign(rate, { url: getVideoLikeActivityPubUrl(byActor, video) }),
       transaction: t
     })
     if (created === true) await video.increment('likes', { transaction: t })
diff --git a/server/lib/activitypub/process/process-undo.ts b/server/lib/activitypub/process/process-undo.ts
index ff019cd8c..438a013b6 100644
--- a/server/lib/activitypub/process/process-undo.ts
+++ b/server/lib/activitypub/process/process-undo.ts
@@ -55,7 +55,8 @@ async function processUndoLike (byActor: ActorModel, activity: ActivityUndo) {
   return sequelizeTypescript.transaction(async t => {
     if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
 
-    const rate = await AccountVideoRateModel.load(byActor.Account.id, video.id, t)
+    let rate = await AccountVideoRateModel.loadByUrl(likeActivity.id, t)
+    if (!rate) rate = await AccountVideoRateModel.load(byActor.Account.id, video.id, t)
     if (!rate) throw new Error(`Unknown rate by account ${byActor.Account.id} for video ${video.id}.`)
 
     await rate.destroy({ transaction: t })
@@ -78,7 +79,8 @@ async function processUndoDislike (byActor: ActorModel, activity: ActivityUndo)
   return sequelizeTypescript.transaction(async t => {
     if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
 
-    const rate = await AccountVideoRateModel.load(byActor.Account.id, video.id, t)
+    let rate = await AccountVideoRateModel.loadByUrl(dislike.id, t)
+    if (!rate) rate = await AccountVideoRateModel.load(byActor.Account.id, video.id, t)
     if (!rate) throw new Error(`Unknown rate by account ${byActor.Account.id} for video ${video.id}.`)
 
     await rate.destroy({ transaction: t })
diff --git a/server/lib/activitypub/process/process.ts b/server/lib/activitypub/process/process.ts
index b263f1ea2..b9b255ddf 100644
--- a/server/lib/activitypub/process/process.ts
+++ b/server/lib/activitypub/process/process.ts
@@ -1,5 +1,5 @@
 import { Activity, ActivityType } from '../../../../shared/models/activitypub'
-import { getActorUrl } from '../../../helpers/activitypub'
+import { checkUrlsSameHost, getActorUrl } from '../../../helpers/activitypub'
 import { logger } from '../../../helpers/logger'
 import { ActorModel } from '../../../models/activitypub/actor'
 import { processAcceptActivity } from './process-accept'
@@ -25,11 +25,17 @@ const processActivity: { [ P in ActivityType ]: (activity: Activity, byActor: Ac
   Like: processLikeActivity
 }
 
-async function processActivities (activities: Activity[], signatureActor?: ActorModel, inboxActor?: ActorModel) {
+async function processActivities (
+  activities: Activity[],
+  options: {
+    signatureActor?: ActorModel
+    inboxActor?: ActorModel
+    outboxUrl?: string
+  } = {}) {
   const actorsCache: { [ url: string ]: ActorModel } = {}
 
   for (const activity of activities) {
-    if (!signatureActor && [ 'Create', 'Announce', 'Like' ].indexOf(activity.type) === -1) {
+    if (!options.signatureActor && [ 'Create', 'Announce', 'Like' ].indexOf(activity.type) === -1) {
       logger.error('Cannot process activity %s (type: %s) without the actor signature.', activity.id, activity.type)
       continue
     }
@@ -37,12 +43,17 @@ async function processActivities (activities: Activity[], signatureActor?: Actor
     const actorUrl = getActorUrl(activity.actor)
 
     // When we fetch remote data, we don't have signature
-    if (signatureActor && actorUrl !== signatureActor.url) {
-      logger.warn('Signature mismatch between %s and %s.', actorUrl, signatureActor.url)
+    if (options.signatureActor && actorUrl !== options.signatureActor.url) {
+      logger.warn('Signature mismatch between %s and %s, skipping.', actorUrl, options.signatureActor.url)
       continue
     }
 
-    const byActor = signatureActor || actorsCache[actorUrl] || await getOrCreateActorAndServerAndModel(actorUrl)
+    if (options.outboxUrl && checkUrlsSameHost(options.outboxUrl, actorUrl) !== true) {
+      logger.warn('Host mismatch between outbox URL %s and actor URL %s, skipping.', options.outboxUrl, actorUrl)
+      continue
+    }
+
+    const byActor = options.signatureActor || actorsCache[actorUrl] || await getOrCreateActorAndServerAndModel(actorUrl)
     actorsCache[actorUrl] = byActor
 
     const activityProcessor = processActivity[activity.type]
@@ -52,7 +63,7 @@ async function processActivities (activities: Activity[], signatureActor?: Actor
     }
 
     try {
-      await activityProcessor(activity, byActor, inboxActor)
+      await activityProcessor(activity, byActor, options.inboxActor)
     } catch (err) {
       logger.warn('Cannot process activity %s.', activity.type, { err })
     }
diff --git a/server/lib/activitypub/send/send-create.ts b/server/lib/activitypub/send/send-create.ts
index 285edba3b..e3fca0a17 100644
--- a/server/lib/activitypub/send/send-create.ts
+++ b/server/lib/activitypub/send/send-create.ts
@@ -95,7 +95,7 @@ async function sendCreateView (byActor: ActorModel, video: VideoModel, t: Transa
   logger.info('Creating job to send view of %s.', video.url)
 
   const url = getVideoViewActivityPubUrl(byActor, video)
-  const viewActivity = buildViewActivity(byActor, video)
+  const viewActivity = buildViewActivity(url, byActor, video)
 
   return sendVideoRelatedCreateActivity({
     // Use the server actor to send the view
@@ -111,7 +111,7 @@ async function sendCreateDislike (byActor: ActorModel, video: VideoModel, t: Tra
   logger.info('Creating job to dislike %s.', video.url)
 
   const url = getVideoDislikeActivityPubUrl(byActor, video)
-  const dislikeActivity = buildDislikeActivity(byActor, video)
+  const dislikeActivity = buildDislikeActivity(url, byActor, video)
 
   return sendVideoRelatedCreateActivity({
     byActor,
@@ -136,16 +136,18 @@ function buildCreateActivity (url: string, byActor: ActorModel, object: any, aud
   )
 }
 
-function buildDislikeActivity (byActor: ActorModel, video: VideoModel) {
+function buildDislikeActivity (url: string, byActor: ActorModel, video: VideoModel) {
   return {
+    id: url,
     type: 'Dislike',
     actor: byActor.url,
     object: video.url
   }
 }
 
-function buildViewActivity (byActor: ActorModel, video: VideoModel) {
+function buildViewActivity (url: string, byActor: ActorModel, video: VideoModel) {
   return {
+    id: url,
     type: 'View',
     actor: byActor.url,
     object: video.url
diff --git a/server/lib/activitypub/send/send-like.ts b/server/lib/activitypub/send/send-like.ts
index 89307acc6..35227887a 100644
--- a/server/lib/activitypub/send/send-like.ts
+++ b/server/lib/activitypub/send/send-like.ts
@@ -24,8 +24,8 @@ function buildLikeActivity (url: string, byActor: ActorModel, video: VideoModel,
 
   return audiencify(
     {
-      type: 'Like' as 'Like',
       id: url,
+      type: 'Like' as 'Like',
       actor: byActor.url,
       object: video.url
     },
diff --git a/server/lib/activitypub/send/send-undo.ts b/server/lib/activitypub/send/send-undo.ts
index 5236d2cb3..bf1b6e117 100644
--- a/server/lib/activitypub/send/send-undo.ts
+++ b/server/lib/activitypub/send/send-undo.ts
@@ -64,7 +64,7 @@ async function sendUndoDislike (byActor: ActorModel, video: VideoModel, t: Trans
   logger.info('Creating job to undo a dislike of video %s.', video.url)
 
   const dislikeUrl = getVideoDislikeActivityPubUrl(byActor, video)
-  const dislikeActivity = buildDislikeActivity(byActor, video)
+  const dislikeActivity = buildDislikeActivity(dislikeUrl, byActor, video)
   const createDislikeActivity = buildCreateActivity(dislikeUrl, byActor, dislikeActivity)
 
   return sendUndoVideoRelatedActivity({ byActor, video, url: dislikeUrl, activity: createDislikeActivity, transaction: t })
diff --git a/server/lib/activitypub/share.ts b/server/lib/activitypub/share.ts
index 3ff60a97c..d2649e2d5 100644
--- a/server/lib/activitypub/share.ts
+++ b/server/lib/activitypub/share.ts
@@ -4,13 +4,14 @@ import { getServerActor } from '../../helpers/utils'
 import { VideoModel } from '../../models/video/video'
 import { VideoShareModel } from '../../models/video/video-share'
 import { sendUndoAnnounce, sendVideoAnnounce } from './send'
-import { getAnnounceActivityPubUrl } from './url'
+import { getVideoAnnounceActivityPubUrl } from './url'
 import { VideoChannelModel } from '../../models/video/video-channel'
 import * as Bluebird from 'bluebird'
 import { doRequest } from '../../helpers/requests'
 import { getOrCreateActorAndServerAndModel } from './actor'
 import { logger } from '../../helpers/logger'
 import { CRAWL_REQUEST_CONCURRENCY } from '../../initializers'
+import { checkUrlsSameHost, getActorUrl } from '../../helpers/activitypub'
 
 async function shareVideoByServerAndChannel (video: VideoModel, t: Transaction) {
   if (video.privacy === VideoPrivacy.PRIVATE) return undefined
@@ -38,9 +39,13 @@ async function addVideoShares (shareUrls: string[], instance: VideoModel) {
         json: true,
         activityPub: true
       })
-      if (!body || !body.actor) throw new Error('Body of body actor is invalid')
+      if (!body || !body.actor) throw new Error('Body or body actor is invalid')
+
+      const actorUrl = getActorUrl(body.actor)
+      if (checkUrlsSameHost(shareUrl, actorUrl) !== true) {
+        throw new Error(`Actor url ${actorUrl} has not the same host than the share url ${shareUrl}`)
+      }
 
-      const actorUrl = body.actor
       const actor = await getOrCreateActorAndServerAndModel(actorUrl)
 
       const entry = {
@@ -72,7 +77,7 @@ export {
 async function shareByServer (video: VideoModel, t: Transaction) {
   const serverActor = await getServerActor()
 
-  const serverShareUrl = getAnnounceActivityPubUrl(video.url, serverActor)
+  const serverShareUrl = getVideoAnnounceActivityPubUrl(serverActor, video)
   return VideoShareModel.findOrCreate({
     defaults: {
       actorId: serverActor.id,
@@ -91,7 +96,7 @@ async function shareByServer (video: VideoModel, t: Transaction) {
 }
 
 async function shareByVideoChannel (video: VideoModel, t: Transaction) {
-  const videoChannelShareUrl = getAnnounceActivityPubUrl(video.url, video.VideoChannel.Actor)
+  const videoChannelShareUrl = getVideoAnnounceActivityPubUrl(video.VideoChannel.Actor, video)
   return VideoShareModel.findOrCreate({
     defaults: {
       actorId: video.VideoChannel.actorId,
diff --git a/server/lib/activitypub/url.ts b/server/lib/activitypub/url.ts
index e792be698..38f15448c 100644
--- a/server/lib/activitypub/url.ts
+++ b/server/lib/activitypub/url.ts
@@ -33,14 +33,14 @@ function getVideoAbuseActivityPubUrl (videoAbuse: VideoAbuseModel) {
 }
 
 function getVideoViewActivityPubUrl (byActor: ActorModel, video: VideoModel) {
-  return video.url + '/views/' + byActor.uuid + '/' + new Date().toISOString()
+  return byActor.url + '/views/videos/' + video.id + '/' + new Date().toISOString()
 }
 
-function getVideoLikeActivityPubUrl (byActor: ActorModel, video: VideoModel) {
+function getVideoLikeActivityPubUrl (byActor: ActorModel, video: VideoModel | { id: number }) {
   return byActor.url + '/likes/' + video.id
 }
 
-function getVideoDislikeActivityPubUrl (byActor: ActorModel, video: VideoModel) {
+function getVideoDislikeActivityPubUrl (byActor: ActorModel, video: VideoModel | { id: number }) {
   return byActor.url + '/dislikes/' + video.id
 }
 
@@ -74,8 +74,8 @@ function getActorFollowAcceptActivityPubUrl (actorFollow: ActorFollowModel) {
   return follower.url + '/accepts/follows/' + me.id
 }
 
-function getAnnounceActivityPubUrl (originalUrl: string, byActor: ActorModel) {
-  return originalUrl + '/announces/' + byActor.id
+function getVideoAnnounceActivityPubUrl (byActor: ActorModel, video: VideoModel) {
+  return video.url + '/announces/' + byActor.id
 }
 
 function getDeleteActivityPubUrl (originalUrl: string) {
@@ -97,7 +97,7 @@ export {
   getVideoAbuseActivityPubUrl,
   getActorFollowActivityPubUrl,
   getActorFollowAcceptActivityPubUrl,
-  getAnnounceActivityPubUrl,
+  getVideoAnnounceActivityPubUrl,
   getUpdateActivityPubUrl,
   getUndoActivityPubUrl,
   getVideoViewActivityPubUrl,
diff --git a/server/lib/activitypub/video-comments.ts b/server/lib/activitypub/video-comments.ts
index c8c17f4c4..5868e7297 100644
--- a/server/lib/activitypub/video-comments.ts
+++ b/server/lib/activitypub/video-comments.ts
@@ -9,6 +9,7 @@ import { VideoCommentModel } from '../../models/video/video-comment'
 import { getOrCreateActorAndServerAndModel } from './actor'
 import { getOrCreateVideoAndAccountAndChannel } from './videos'
 import * as Bluebird from 'bluebird'
+import { checkUrlsSameHost } from '../../helpers/activitypub'
 
 async function videoCommentActivityObjectToDBAttributes (video: VideoModel, actor: ActorModel, comment: VideoCommentObject) {
   let originCommentId: number = null
@@ -61,6 +62,14 @@ async function addVideoComment (videoInstance: VideoModel, commentUrl: string) {
   const actorUrl = body.attributedTo
   if (!actorUrl) return { created: false }
 
+  if (checkUrlsSameHost(commentUrl, actorUrl) !== true) {
+    throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${commentUrl}`)
+  }
+
+  if (checkUrlsSameHost(body.id, commentUrl) !== true) {
+    throw new Error(`Comment url ${commentUrl} host is different from the AP object id ${body.id}`)
+  }
+
   const actor = await getOrCreateActorAndServerAndModel(actorUrl)
   const entry = await videoCommentActivityObjectToDBAttributes(videoInstance, actor, body)
   if (!entry) return { created: false }
@@ -134,6 +143,14 @@ async function resolveThread (url: string, comments: VideoCommentModel[] = []) {
     const actorUrl = body.attributedTo
     if (!actorUrl) throw new Error('Miss attributed to in comment')
 
+    if (checkUrlsSameHost(url, actorUrl) !== true) {
+      throw new Error(`Actor url ${actorUrl} has not the same host than the comment url ${url}`)
+    }
+
+    if (checkUrlsSameHost(body.id, url) !== true) {
+      throw new Error(`Comment url ${url} host is different from the AP object id ${body.id}`)
+    }
+
     const actor = await getOrCreateActorAndServerAndModel(actorUrl)
     const comment = new VideoCommentModel({
       url: body.id,
diff --git a/server/lib/activitypub/video-rates.ts b/server/lib/activitypub/video-rates.ts
index 1619251c3..1854b44c4 100644
--- a/server/lib/activitypub/video-rates.ts
+++ b/server/lib/activitypub/video-rates.ts
@@ -8,13 +8,35 @@ import { getOrCreateActorAndServerAndModel } from './actor'
 import { AccountVideoRateModel } from '../../models/account/account-video-rate'
 import { logger } from '../../helpers/logger'
 import { CRAWL_REQUEST_CONCURRENCY } from '../../initializers'
+import { doRequest } from '../../helpers/requests'
+import { checkUrlsSameHost, getActorUrl } from '../../helpers/activitypub'
+import { ActorModel } from '../../models/activitypub/actor'
+import { getVideoDislikeActivityPubUrl, getVideoLikeActivityPubUrl } from './url'
 
-async function createRates (actorUrls: string[], video: VideoModel, rate: VideoRateType) {
+async function createRates (ratesUrl: string[], video: VideoModel, rate: VideoRateType) {
   let rateCounts = 0
 
-  await Bluebird.map(actorUrls, async actorUrl => {
+  await Bluebird.map(ratesUrl, async rateUrl => {
     try {
+      // Fetch url
+      const { body } = await doRequest({
+        uri: rateUrl,
+        json: true,
+        activityPub: true
+      })
+      if (!body || !body.actor) throw new Error('Body or body actor is invalid')
+
+      const actorUrl = getActorUrl(body.actor)
+      if (checkUrlsSameHost(actorUrl, rateUrl) !== true) {
+        throw new Error(`Rate url ${rateUrl} has not the same host than actor url ${actorUrl}`)
+      }
+
+      if (checkUrlsSameHost(body.id, rateUrl) !== true) {
+        throw new Error(`Rate url ${rateUrl} host is different from the AP object id ${body.id}`)
+      }
+
       const actor = await getOrCreateActorAndServerAndModel(actorUrl)
+
       const [ , created ] = await AccountVideoRateModel
         .findOrCreate({
           where: {
@@ -24,13 +46,14 @@ async function createRates (actorUrls: string[], video: VideoModel, rate: VideoR
           defaults: {
             videoId: video.id,
             accountId: actor.Account.id,
-            type: rate
+            type: rate,
+            url: body.id
           }
         })
 
       if (created) rateCounts += 1
     } catch (err) {
-      logger.warn('Cannot add rate %s for actor %s.', rate, actorUrl, { err })
+      logger.warn('Cannot add rate %s.', rateUrl, { err })
     }
   }, { concurrency: CRAWL_REQUEST_CONCURRENCY })
 
@@ -62,7 +85,12 @@ async function sendVideoRateChange (account: AccountModel,
   if (dislikes > 0) await sendCreateDislike(actor, video, t)
 }
 
+function getRateUrl (rateType: VideoRateType, actor: ActorModel, video: VideoModel) {
+  return rateType === 'like' ? getVideoLikeActivityPubUrl(actor, video) : getVideoDislikeActivityPubUrl(actor, video)
+}
+
 export {
+  getRateUrl,
   createRates,
   sendVideoRateChange
 }
diff --git a/server/lib/activitypub/videos.ts b/server/lib/activitypub/videos.ts
index 3da363c0a..5bd03c8c6 100644
--- a/server/lib/activitypub/videos.ts
+++ b/server/lib/activitypub/videos.ts
@@ -29,6 +29,7 @@ import { createRates } from './video-rates'
 import { addVideoShares, shareVideoByServerAndChannel } from './share'
 import { AccountModel } from '../../models/account/account'
 import { fetchVideoByUrl, VideoFetchByUrlType } from '../../helpers/video'
+import { checkUrlsSameHost } from '../../helpers/activitypub'
 
 async function federateVideoIfNeeded (video: VideoModel, isNewVideo: boolean, transaction?: sequelize.Transaction) {
   // If the video is not private and published, we federate it
@@ -63,7 +64,7 @@ async function fetchRemoteVideo (videoUrl: string): Promise<{ response: request.
 
   const { response, body } = await doRequest(options)
 
-  if (sanitizeAndCheckVideoTorrentObject(body) === false) {
+  if (sanitizeAndCheckVideoTorrentObject(body) === false || checkUrlsSameHost(body.id, videoUrl) !== true) {
     logger.debug('Remote video JSON is not valid.', { body })
     return { response, videoObject: undefined }
   }
@@ -107,6 +108,10 @@ function getOrCreateVideoChannelFromVideoObject (videoObject: VideoTorrentObject
   const channel = videoObject.attributedTo.find(a => a.type === 'Group')
   if (!channel) throw new Error('Cannot find associated video channel to video ' + videoObject.url)
 
+  if (checkUrlsSameHost(channel.id, videoObject.id) !== true) {
+    throw new Error(`Video channel url ${channel.id} does not have the same host than video object id ${videoObject.id}`)
+  }
+
   return getOrCreateActorAndServerAndModel(channel.id, 'all')
 }
 
diff --git a/server/lib/job-queue/handlers/activitypub-http-fetcher.ts b/server/lib/job-queue/handlers/activitypub-http-fetcher.ts
index 42217c27c..67ccfa995 100644
--- a/server/lib/job-queue/handlers/activitypub-http-fetcher.ts
+++ b/server/lib/job-queue/handlers/activitypub-http-fetcher.ts
@@ -23,7 +23,7 @@ async function processActivityPubHttpFetcher (job: Bull.Job) {
   if (payload.videoId) video = await VideoModel.loadAndPopulateAccountAndServerAndTags(payload.videoId)
 
   const fetcherType: { [ id in FetchType ]: (items: any[]) => Promise<any> } = {
-    'activity': items => processActivities(items),
+    'activity': items => processActivities(items, { outboxUrl: payload.uri }),
     'video-likes': items => createRates(items, video, 'like'),
     'video-dislikes': items => createRates(items, video, 'dislike'),
     'video-shares': items => addVideoShares(items, video),
diff --git a/server/lib/job-queue/handlers/utils/activitypub-http-utils.ts b/server/lib/job-queue/handlers/utils/activitypub-http-utils.ts
index fd9c74341..4961d4502 100644
--- a/server/lib/job-queue/handlers/utils/activitypub-http-utils.ts
+++ b/server/lib/job-queue/handlers/utils/activitypub-http-utils.ts
@@ -38,15 +38,20 @@ async function buildSignedRequestOptions (payload: Payload) {
   }
 }
 
-function buildGlobalHeaders (body: object) {
-  const digest = 'SHA-256=' + sha256(JSON.stringify(body), 'base64')
-
+function buildGlobalHeaders (body: any) {
   return {
-    'Digest': digest
+    'Digest': buildDigest(body)
   }
 }
 
+function buildDigest (body: any) {
+  const rawBody = typeof body === 'string' ? body : JSON.stringify(body)
+
+  return 'SHA-256=' + sha256(rawBody, 'base64')
+}
+
 export {
+  buildDigest,
   buildGlobalHeaders,
   computeBody,
   buildSignedRequestOptions
diff --git a/server/lib/job-queue/handlers/video-views.ts b/server/lib/job-queue/handlers/video-views.ts
index cf180a11a..f44c3c727 100644
--- a/server/lib/job-queue/handlers/video-views.ts
+++ b/server/lib/job-queue/handlers/video-views.ts
@@ -3,8 +3,9 @@ import { logger } from '../../../helpers/logger'
 import { VideoModel } from '../../../models/video/video'
 import { VideoViewModel } from '../../../models/video/video-views'
 import { isTestInstance } from '../../../helpers/core-utils'
+import { federateVideoIfNeeded } from '../../activitypub'
 
-async function processVideosViewsViews () {
+async function processVideosViews () {
   const lastHour = new Date()
 
   // In test mode, we run this function multiple times per hour, so we don't want the values of the previous hour
@@ -36,6 +37,9 @@ async function processVideosViewsViews () {
             views,
             videoId
           })
+
+          const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
+          if (video.isOwned()) await federateVideoIfNeeded(video, false)
         } catch (err) {
           logger.debug('Cannot create video views for video %d in hour %d. Maybe the video does not exist anymore?', videoId, hour)
         }
@@ -51,5 +55,5 @@ async function processVideosViewsViews () {
 // ---------------------------------------------------------------------------
 
 export {
-  processVideosViewsViews
+  processVideosViews
 }
diff --git a/server/lib/job-queue/job-queue.ts b/server/lib/job-queue/job-queue.ts
index 0696ba43c..4cfd4d253 100644
--- a/server/lib/job-queue/job-queue.ts
+++ b/server/lib/job-queue/job-queue.ts
@@ -10,7 +10,7 @@ import { EmailPayload, processEmail } from './handlers/email'
 import { processVideoFile, processVideoFileImport, VideoFileImportPayload, VideoFilePayload } from './handlers/video-file'
 import { ActivitypubFollowPayload, processActivityPubFollow } from './handlers/activitypub-follow'
 import { processVideoImport, VideoImportPayload } from './handlers/video-import'
-import { processVideosViewsViews } from './handlers/video-views'
+import { processVideosViews } from './handlers/video-views'
 
 type CreateJobArgument =
   { type: 'activitypub-http-broadcast', payload: ActivitypubHttpBroadcastPayload } |
@@ -32,7 +32,7 @@ const handlers: { [ id in JobType ]: (job: Bull.Job) => Promise<any>} = {
   'video-file': processVideoFile,
   'email': processEmail,
   'video-import': processVideoImport,
-  'videos-views': processVideosViewsViews
+  'videos-views': processVideosViews
 }
 
 const jobTypes: JobType[] = [
diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index c49a8c89a..8b7f33539 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -185,11 +185,12 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
   }
 
   private async isTooHeavy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    const maxSize = redundancy.size - this.getTotalFileSizes(filesToDuplicate)
+    const maxSize = redundancy.size
 
     const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(redundancy.strategy)
+    const totalWillDuplicate = totalDuplicated + this.getTotalFileSizes(filesToDuplicate)
 
-    return totalDuplicated > maxSize
+    return totalWillDuplicate > maxSize
   }
 
   private buildNewExpiration (expiresAfterMs: number) {
diff --git a/server/middlewares/activitypub.ts b/server/middlewares/activitypub.ts
index 1ec888477..01e5dd24e 100644
--- a/server/middlewares/activitypub.ts
+++ b/server/middlewares/activitypub.ts
@@ -53,7 +53,8 @@ function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
 
 export {
   checkSignature,
-  executeIfActivityPub
+  executeIfActivityPub,
+  checkHttpSignature
 }
 
 // ---------------------------------------------------------------------------
@@ -94,7 +95,7 @@ async function checkHttpSignature (req: Request, res: Response) {
 async function checkJsonLDSignature (req: Request, res: Response) {
   const signatureObject: ActivityPubSignature = req.body.signature
 
-  if (!signatureObject.creator) {
+  if (!signatureObject || !signatureObject.creator) {
     res.sendStatus(403)
     return false
   }
diff --git a/server/middlewares/validators/videos/index.ts b/server/middlewares/validators/videos/index.ts
index 294783d85..a0d585b93 100644
--- a/server/middlewares/validators/videos/index.ts
+++ b/server/middlewares/validators/videos/index.ts
@@ -5,4 +5,6 @@ export * from './video-channels'
 export * from './video-comments'
 export * from './video-imports'
 export * from './video-watch'
+export * from './video-rates'
+export * from './video-shares'
 export * from './videos'
diff --git a/server/middlewares/validators/videos/video-rates.ts b/server/middlewares/validators/videos/video-rates.ts
new file mode 100644
index 000000000..793354520
--- /dev/null
+++ b/server/middlewares/validators/videos/video-rates.ts
@@ -0,0 +1,55 @@
+import * as express from 'express'
+import 'express-validator'
+import { body, param } from 'express-validator/check'
+import { isIdOrUUIDValid, isIdValid } from '../../../helpers/custom-validators/misc'
+import { isVideoExist, isVideoRatingTypeValid } from '../../../helpers/custom-validators/videos'
+import { logger } from '../../../helpers/logger'
+import { areValidationErrors } from '../utils'
+import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
+import { VideoRateType } from '../../../../shared/models/videos'
+import { isAccountNameValid } from '../../../helpers/custom-validators/accounts'
+
+const videoUpdateRateValidator = [
+  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
+  body('rating').custom(isVideoRatingTypeValid).withMessage('Should have a valid rate type'),
+
+  async (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoRate parameters', { parameters: req.body })
+
+    if (areValidationErrors(req, res)) return
+    if (!await isVideoExist(req.params.id, res)) return
+
+    return next()
+  }
+]
+
+const getAccountVideoRateValidator = function (rateType: VideoRateType) {
+  return [
+    param('name').custom(isAccountNameValid).withMessage('Should have a valid account name'),
+    param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid videoId'),
+
+    async (req: express.Request, res: express.Response, next: express.NextFunction) => {
+      logger.debug('Checking videoCommentGetValidator parameters.', { parameters: req.params })
+
+      if (areValidationErrors(req, res)) return
+
+      const rate = await AccountVideoRateModel.loadLocalAndPopulateVideo(rateType, req.params.name, req.params.videoId)
+      if (!rate) {
+        return res.status(404)
+                  .json({ error: 'Video rate not found' })
+                  .end()
+      }
+
+      res.locals.accountVideoRate = rate
+
+      return next()
+    }
+  ]
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  videoUpdateRateValidator,
+  getAccountVideoRateValidator
+}
diff --git a/server/middlewares/validators/videos/video-shares.ts b/server/middlewares/validators/videos/video-shares.ts
new file mode 100644
index 000000000..646d7acb1
--- /dev/null
+++ b/server/middlewares/validators/videos/video-shares.ts
@@ -0,0 +1,38 @@
+import * as express from 'express'
+import 'express-validator'
+import { param } from 'express-validator/check'
+import { isIdOrUUIDValid, isIdValid } from '../../../helpers/custom-validators/misc'
+import { isVideoExist } from '../../../helpers/custom-validators/videos'
+import { logger } from '../../../helpers/logger'
+import { VideoShareModel } from '../../../models/video/video-share'
+import { areValidationErrors } from '../utils'
+import { VideoModel } from '../../../models/video/video'
+
+const videosShareValidator = [
+  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
+  param('actorId').custom(isIdValid).not().isEmpty().withMessage('Should have a valid actor id'),
+
+  async (req: express.Request, res: express.Response, next: express.NextFunction) => {
+    logger.debug('Checking videoShare parameters', { parameters: req.params })
+
+    if (areValidationErrors(req, res)) return
+    if (!await isVideoExist(req.params.id, res)) return
+
+    const video: VideoModel = res.locals.video
+
+    const share = await VideoShareModel.load(req.params.actorId, video.id)
+    if (!share) {
+      return res.status(404)
+                .end()
+    }
+
+    res.locals.videoShare = share
+    return next()
+  }
+]
+
+// ---------------------------------------------------------------------------
+
+export {
+  videosShareValidator
+}
diff --git a/server/middlewares/validators/videos/videos.ts b/server/middlewares/validators/videos/videos.ts
index 9dc52a134..656d161d8 100644
--- a/server/middlewares/validators/videos/videos.ts
+++ b/server/middlewares/validators/videos/videos.ts
@@ -26,14 +26,12 @@ import {
   isVideoLicenceValid,
   isVideoNameValid,
   isVideoPrivacyValid,
-  isVideoRatingTypeValid,
   isVideoSupportValid,
   isVideoTagsValid
 } from '../../../helpers/custom-validators/videos'
 import { getDurationFromVideoFile } from '../../../helpers/ffmpeg-utils'
 import { logger } from '../../../helpers/logger'
 import { CONSTRAINTS_FIELDS } from '../../../initializers'
-import { VideoShareModel } from '../../../models/video/video-share'
 import { authenticate } from '../../oauth'
 import { areValidationErrors } from '../utils'
 import { cleanUpReqFiles } from '../../../helpers/express-utils'
@@ -188,41 +186,6 @@ const videosRemoveValidator = [
   }
 ]
 
-const videoRateValidator = [
-  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
-  body('rating').custom(isVideoRatingTypeValid).withMessage('Should have a valid rate type'),
-
-  async (req: express.Request, res: express.Response, next: express.NextFunction) => {
-    logger.debug('Checking videoRate parameters', { parameters: req.body })
-
-    if (areValidationErrors(req, res)) return
-    if (!await isVideoExist(req.params.id, res)) return
-
-    return next()
-  }
-]
-
-const videosShareValidator = [
-  param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
-  param('accountId').custom(isIdValid).not().isEmpty().withMessage('Should have a valid account id'),
-
-  async (req: express.Request, res: express.Response, next: express.NextFunction) => {
-    logger.debug('Checking videoShare parameters', { parameters: req.params })
-
-    if (areValidationErrors(req, res)) return
-    if (!await isVideoExist(req.params.id, res)) return
-
-    const share = await VideoShareModel.load(req.params.accountId, res.locals.video.id, undefined)
-    if (!share) {
-      return res.status(404)
-        .end()
-    }
-
-    res.locals.videoShare = share
-    return next()
-  }
-]
-
 const videosChangeOwnershipValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
 
@@ -415,9 +378,6 @@ export {
   videosGetValidator,
   videosCustomGetValidator,
   videosRemoveValidator,
-  videosShareValidator,
-
-  videoRateValidator,
 
   videosChangeOwnershipValidator,
   videosTerminateChangeOwnershipValidator,
diff --git a/server/models/account/account-video-rate.ts b/server/models/account/account-video-rate.ts
index c99e32012..18762f0c5 100644
--- a/server/models/account/account-video-rate.ts
+++ b/server/models/account/account-video-rate.ts
@@ -1,12 +1,14 @@
 import { values } from 'lodash'
 import { Transaction } from 'sequelize'
-import { AllowNull, BelongsTo, Column, CreatedAt, DataType, ForeignKey, Model, Table, UpdatedAt } from 'sequelize-typescript'
+import { AllowNull, BelongsTo, Column, CreatedAt, DataType, ForeignKey, Is, Model, Table, UpdatedAt } from 'sequelize-typescript'
 import { IFindOptions } from 'sequelize-typescript/lib/interfaces/IFindOptions'
 import { VideoRateType } from '../../../shared/models/videos'
-import { VIDEO_RATE_TYPES } from '../../initializers'
+import { CONSTRAINTS_FIELDS, VIDEO_RATE_TYPES } from '../../initializers'
 import { VideoModel } from '../video/video'
 import { AccountModel } from './account'
 import { ActorModel } from '../activitypub/actor'
+import { throwIfNotValid } from '../utils'
+import { isActivityPubUrlValid } from '../../helpers/custom-validators/activitypub/misc'
 
 /*
   Account rates per video.
@@ -26,6 +28,10 @@ import { ActorModel } from '../activitypub/actor'
     },
     {
       fields: [ 'videoId', 'type' ]
+    },
+    {
+      fields: [ 'url' ],
+      unique: true
     }
   ]
 })
@@ -35,6 +41,11 @@ export class AccountVideoRateModel extends Model<AccountVideoRateModel> {
   @Column(DataType.ENUM(values(VIDEO_RATE_TYPES)))
   type: VideoRateType
 
+  @AllowNull(false)
+  @Is('AccountVideoRateUrl', value => throwIfNotValid(value, isActivityPubUrlValid, 'url'))
+  @Column(DataType.STRING(CONSTRAINTS_FIELDS.VIDEO_RATES.URL.max))
+  url: string
+
   @CreatedAt
   createdAt: Date
 
@@ -65,7 +76,7 @@ export class AccountVideoRateModel extends Model<AccountVideoRateModel> {
   })
   Account: AccountModel
 
-  static load (accountId: number, videoId: number, transaction: Transaction) {
+  static load (accountId: number, videoId: number, transaction?: Transaction) {
     const options: IFindOptions<AccountVideoRateModel> = {
       where: {
         accountId,
@@ -77,6 +88,49 @@ export class AccountVideoRateModel extends Model<AccountVideoRateModel> {
     return AccountVideoRateModel.findOne(options)
   }
 
+  static loadLocalAndPopulateVideo (rateType: VideoRateType, accountName: string, videoId: number, transaction?: Transaction) {
+    const options: IFindOptions<AccountVideoRateModel> = {
+      where: {
+        videoId,
+        type: rateType
+      },
+      include: [
+        {
+          model: AccountModel.unscoped(),
+          required: true,
+          include: [
+            {
+              attributes: [ 'id', 'url', 'preferredUsername' ],
+              model: ActorModel.unscoped(),
+              required: true,
+              where: {
+                preferredUsername: accountName
+              }
+            }
+          ]
+        },
+        {
+          model: VideoModel.unscoped(),
+          required: true
+        }
+      ]
+    }
+    if (transaction) options.transaction = transaction
+
+    return AccountVideoRateModel.findOne(options)
+  }
+
+  static loadByUrl (url: string, transaction: Transaction) {
+    const options: IFindOptions<AccountVideoRateModel> = {
+      where: {
+        url
+      }
+    }
+    if (transaction) options.transaction = transaction
+
+    return AccountVideoRateModel.findOne(options)
+  }
+
   static listAndCountAccountUrlsByVideoId (rateType: VideoRateType, videoId: number, start: number, count: number, t?: Transaction) {
     const query = {
       offset: start,
diff --git a/server/models/oauth/oauth-token.ts b/server/models/oauth/oauth-token.ts
index ef9592c04..ecf846821 100644
--- a/server/models/oauth/oauth-token.ts
+++ b/server/models/oauth/oauth-token.ts
@@ -47,7 +47,7 @@ enum ScopeNames {
             required: true,
             include: [
               {
-                attributes: [ 'id' ],
+                attributes: [ 'id', 'url' ],
                 model: () => ActorModel.unscoped(),
                 required: true
               }
diff --git a/server/models/redundancy/video-redundancy.ts b/server/models/redundancy/video-redundancy.ts
index cbfc7f7fa..35e0cd3b1 100644
--- a/server/models/redundancy/video-redundancy.ts
+++ b/server/models/redundancy/video-redundancy.ts
@@ -293,6 +293,11 @@ export class VideoRedundancyModel extends Model<VideoRedundancyModel> {
     }
 
     return VideoFileModel.sum('size', options as any) // FIXME: typings
+      .then(v => {
+        if (!v || isNaN(v)) return 0
+
+        return v
+      })
   }
 
   static async listLocalExpired () {
diff --git a/server/models/video/video-share.ts b/server/models/video/video-share.ts
index fa9a70d50..c87f71277 100644
--- a/server/models/video/video-share.ts
+++ b/server/models/video/video-share.ts
@@ -88,7 +88,7 @@ export class VideoShareModel extends Model<VideoShareModel> {
   })
   Video: VideoModel
 
-  static load (actorId: number, videoId: number, t: Sequelize.Transaction) {
+  static load (actorId: number, videoId: number, t?: Sequelize.Transaction) {
     return VideoShareModel.scope(ScopeNames.WITH_ACTOR).findOne({
       where: {
         actorId,
diff --git a/server/tests/activitypub.ts b/server/tests/api/activitypub/client.ts
index 0905c5dec..334cd4e5c 100644
--- a/server/tests/activitypub.ts
+++ b/server/tests/api/activitypub/client.ts
@@ -11,6 +11,7 @@ import {
   setAccessTokensToServers
 } from '../../shared/utils'
 
+
 const expect = chai.expect
 
 describe('Test activitypub', function () {
diff --git a/server/tests/api/activitypub/fetch.ts b/server/tests/api/activitypub/fetch.ts
new file mode 100644
index 000000000..a42c606c6
--- /dev/null
+++ b/server/tests/api/activitypub/fetch.ts
@@ -0,0 +1,86 @@
+/* tslint:disable:no-unused-expression */
+
+import 'mocha'
+
+import {
+  createUser,
+  doubleFollow,
+  flushAndRunMultipleServers,
+  flushTests,
+  getVideosListSort,
+  killallServers,
+  ServerInfo,
+  setAccessTokensToServers,
+  uploadVideo,
+  userLogin
+} from '../../utils'
+import * as chai from 'chai'
+import { setActorField, setVideoField } from '../../utils/miscs/sql'
+import { waitJobs } from '../../utils/server/jobs'
+import { Video } from '../../../../shared/models/videos'
+
+const expect = chai.expect
+
+describe('Test ActivityPub fetcher', function () {
+  let servers: ServerInfo[]
+
+  // ---------------------------------------------------------------
+
+  before(async function () {
+    this.timeout(60000)
+
+    servers = await flushAndRunMultipleServers(3)
+
+    // Get the access tokens
+    await setAccessTokensToServers(servers)
+
+    const user = { username: 'user1', password: 'password' }
+    for (const server of servers) {
+      await createUser(server.url, server.accessToken, user.username, user.password)
+    }
+
+    const userAccessToken = await userLogin(servers[0], user)
+
+    await uploadVideo(servers[0].url, servers[0].accessToken, { name: 'video root' })
+    const res = await uploadVideo(servers[0].url, servers[0].accessToken, { name: 'bad video root' })
+    const badVideoUUID = res.body.video.uuid
+    await uploadVideo(servers[0].url, userAccessToken, { name: 'video user' })
+
+    await setActorField(1, 'http://localhost:9001/accounts/user1', 'url', 'http://localhost:9002/accounts/user1')
+    await setVideoField(1, badVideoUUID, 'url', 'http://localhost:9003/videos/watch/' + badVideoUUID)
+  })
+
+  it('Should add only the video with a valid actor URL', async function () {
+    this.timeout(60000)
+
+    await doubleFollow(servers[0], servers[1])
+    await waitJobs(servers)
+
+    {
+      const res = await getVideosListSort(servers[0].url, 'createdAt')
+      expect(res.body.total).to.equal(3)
+
+      const data: Video[] = res.body.data
+      expect(data[0].name).to.equal('video root')
+      expect(data[1].name).to.equal('bad video root')
+      expect(data[2].name).to.equal('video user')
+    }
+
+    {
+      const res = await getVideosListSort(servers[1].url, 'createdAt')
+      expect(res.body.total).to.equal(1)
+
+      const data: Video[] = res.body.data
+      expect(data[0].name).to.equal('video root')
+    }
+  })
+
+  after(async function () {
+    killallServers(servers)
+
+    // Keep the logs if the test failed
+    if (this['ok']) {
+      await flushTests()
+    }
+  })
+})
diff --git a/server/tests/api/activitypub/helpers.ts b/server/tests/api/activitypub/helpers.ts
new file mode 100644
index 000000000..610846247
--- /dev/null
+++ b/server/tests/api/activitypub/helpers.ts
@@ -0,0 +1,182 @@
+/* tslint:disable:no-unused-expression */
+
+import 'mocha'
+import { expect } from 'chai'
+import { buildRequestStub } from '../../utils'
+import { isHTTPSignatureVerified, isJsonLDSignatureVerified, parseHTTPSignature } from '../../../helpers/peertube-crypto'
+import { cloneDeep } from 'lodash'
+import { buildSignedActivity } from '../../../helpers/activitypub'
+
+describe('Test activity pub helpers', function () {
+  describe('When checking the Linked Signature', function () {
+
+    it('Should fail with an invalid Mastodon signature', async function () {
+      const body = require('./json/mastodon/create-bad-signature.json')
+      const publicKey = require('./json/mastodon/public-key.json').publicKey
+      const fromActor = { publicKey, url: 'http://localhost:9002/accounts/peertube' }
+
+      const result = await isJsonLDSignatureVerified(fromActor as any, body)
+
+      expect(result).to.be.false
+    })
+
+    it('Should fail with an invalid public key', async function () {
+      const body = require('./json/mastodon/create.json')
+      const publicKey = require('./json/mastodon/bad-public-key.json').publicKey
+      const fromActor = { publicKey, url: 'http://localhost:9002/accounts/peertube' }
+
+      const result = await isJsonLDSignatureVerified(fromActor as any, body)
+
+      expect(result).to.be.false
+    })
+
+    it('Should succeed with a valid Mastodon signature', async function () {
+      const body = require('./json/mastodon/create.json')
+      const publicKey = require('./json/mastodon/public-key.json').publicKey
+      const fromActor = { publicKey, url: 'http://localhost:9002/accounts/peertube' }
+
+      const result = await isJsonLDSignatureVerified(fromActor as any, body)
+
+      expect(result).to.be.true
+    })
+
+    it('Should fail with an invalid PeerTube signature', async function () {
+      const keys = require('./json/peertube/invalid-keys.json')
+      const body = require('./json/peertube/announce-without-context.json')
+
+      const actorSignature = { url: 'http://localhost:9002/accounts/peertube', privateKey: keys.privateKey }
+      const signedBody = await buildSignedActivity(actorSignature as any, body)
+
+      const fromActor = { publicKey: keys.publicKey, url: 'http://localhost:9002/accounts/peertube' }
+      const result = await isJsonLDSignatureVerified(fromActor as any, signedBody)
+
+      expect(result).to.be.false
+    })
+
+    it('Should fail with an invalid PeerTube URL', async function () {
+      const keys = require('./json/peertube/keys.json')
+      const body = require('./json/peertube/announce-without-context.json')
+
+      const actorSignature = { url: 'http://localhost:9002/accounts/peertube', privateKey: keys.privateKey }
+      const signedBody = await buildSignedActivity(actorSignature as any, body)
+
+      const fromActor = { publicKey: keys.publicKey, url: 'http://localhost:9003/accounts/peertube' }
+      const result = await isJsonLDSignatureVerified(fromActor as any, signedBody)
+
+      expect(result).to.be.false
+    })
+
+    it('Should succeed with a valid PeerTube signature', async function () {
+      const keys = require('./json/peertube/keys.json')
+      const body = require('./json/peertube/announce-without-context.json')
+
+      const actorSignature = { url: 'http://localhost:9002/accounts/peertube', privateKey: keys.privateKey }
+      const signedBody = await buildSignedActivity(actorSignature as any, body)
+
+      const fromActor = { publicKey: keys.publicKey, url: 'http://localhost:9002/accounts/peertube' }
+      const result = await isJsonLDSignatureVerified(fromActor as any, signedBody)
+
+      expect(result).to.be.true
+    })
+  })
+
+  describe('When checking HTTP signature', function () {
+    it('Should fail with an invalid http signature', async function () {
+      const req = buildRequestStub()
+      req.method = 'POST'
+      req.url = '/accounts/ronan/inbox'
+
+      const mastodonObject = cloneDeep(require('./json/mastodon/bad-http-signature.json'))
+      req.body = mastodonObject.body
+      req.headers = mastodonObject.headers
+      req.headers.signature = 'Signature ' + req.headers.signature
+
+      const parsed = parseHTTPSignature(req, 3600 * 365 * 3)
+      const publicKey = require('./json/mastodon/public-key.json').publicKey
+
+      const actor = { publicKey }
+      const verified = isHTTPSignatureVerified(parsed, actor as any)
+
+      expect(verified).to.be.false
+    })
+
+    it('Should fail with an invalid public key', async function () {
+      const req = buildRequestStub()
+      req.method = 'POST'
+      req.url = '/accounts/ronan/inbox'
+
+      const mastodonObject = cloneDeep(require('./json/mastodon/http-signature.json'))
+      req.body = mastodonObject.body
+      req.headers = mastodonObject.headers
+      req.headers.signature = 'Signature ' + req.headers.signature
+
+      const parsed = parseHTTPSignature(req, 3600 * 365 * 3)
+      const publicKey = require('./json/mastodon/bad-public-key.json').publicKey
+
+      const actor = { publicKey }
+      const verified = isHTTPSignatureVerified(parsed, actor as any)
+
+      expect(verified).to.be.false
+    })
+
+    it('Should fail because of clock skew', async function () {
+      const req = buildRequestStub()
+      req.method = 'POST'
+      req.url = '/accounts/ronan/inbox'
+
+      const mastodonObject = cloneDeep(require('./json/mastodon/http-signature.json'))
+      req.body = mastodonObject.body
+      req.headers = mastodonObject.headers
+      req.headers.signature = 'Signature ' + req.headers.signature
+
+      let errored = false
+      try {
+        parseHTTPSignature(req)
+      } catch {
+        errored = true
+      }
+
+      expect(errored).to.be.true
+    })
+
+    it('Should fail without scheme', async function () {
+      const req = buildRequestStub()
+      req.method = 'POST'
+      req.url = '/accounts/ronan/inbox'
+
+      const mastodonObject = cloneDeep(require('./json/mastodon/http-signature.json'))
+      req.body = mastodonObject.body
+      req.headers = mastodonObject.headers
+
+      let errored = false
+      try {
+        parseHTTPSignature(req, 3600 * 365 * 3)
+      } catch {
+        errored = true
+      }
+
+      expect(errored).to.be.true
+    })
+
+    it('Should succeed with a valid signature', async function () {
+      const req = buildRequestStub()
+      req.method = 'POST'
+      req.url = '/accounts/ronan/inbox'
+
+      const mastodonObject = cloneDeep(require('./json/mastodon/http-signature.json'))
+      req.body = mastodonObject.body
+      req.headers = mastodonObject.headers
+      req.headers.signature = 'Signature ' + req.headers.signature
+
+      const parsed = parseHTTPSignature(req, 3600 * 365 * 3)
+      const publicKey = require('./json/mastodon/public-key.json').publicKey
+
+      const actor = { publicKey }
+      const verified = isHTTPSignatureVerified(parsed, actor as any)
+
+      expect(verified).to.be.true
+    })
+
+  })
+
+})
diff --git a/server/tests/api/activitypub/index.ts b/server/tests/api/activitypub/index.ts
new file mode 100644
index 000000000..e748f32e9
--- /dev/null
+++ b/server/tests/api/activitypub/index.ts
@@ -0,0 +1,4 @@
+import './client'
+import './fetch'
+import './helpers'
+import './security'
diff --git a/server/tests/api/activitypub/json/mastodon/bad-body-http-signature.json b/server/tests/api/activitypub/json/mastodon/bad-body-http-signature.json
new file mode 100644
index 000000000..4e7bc3af5
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/bad-body-http-signature.json
@@ -0,0 +1,93 @@
+{
+  "headers": {
+    "user-agent": "http.rb/3.3.0 (Mastodon/2.5.0; +http://localhost:3000/)",
+    "host": "localhost",
+    "date": "Mon, 22 Oct 2018 13:34:22 GMT",
+    "accept-encoding": "gzip",
+    "digest": "SHA-256=FEr5j2WSSfdEMcG3NTOXuGU0lUchfTJx4+BtUlWOwDk=",
+    "content-type": "application/activity+json",
+    "signature": "keyId=\"http://localhost:3000/users/ronan2#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest content-type\",signature=\"oLKbgxdFXdXsHJ3x/UsG9Svu7oa8Dyqiy6Jif4wqNuhAqRVMRaG18f+dd2OcfFX3XRGF8p8flZkU6vvoEQBauTwGRGcgXAJuKC1zYIWGk+PeiW8lNUnE4qGapWcTiFnIo7FKauNdsgqg/tvgs1pQIdHkDDjZMI64twP7sTN/4vG1PCq+kyqi/DM+ORLi/W7vFuLVHt2Iz7ikfw/R3/mMtS4FwLops+tVYBQ2iQ9DVRhTwLKVbeL/LLVB/tdGzNZ4F4nImBAQQ9I7WpPM6J/k+cBmoEbrUKs8ptx9gbX3OSsl5wlvPVMNzU9F9yb2MrB/Y/J4qssKz+LbiaktKGj7OQ==\"",
+    "content-length": "2815"
+  },
+  "body": {
+    "@context": [
+      "https://www.w3.org/ns/activitystreams",
+      "https://w3id.org/security/v1",
+      {
+        "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+        "sensitive": "as:sensitive",
+        "movedTo": {
+          "@id": "as:movedTo",
+          "@type": "@id"
+        },
+        "Hashtag": "as:Hashtag",
+        "ostatus": "http://ostatus.org#",
+        "atomUri": "ostatus:atomUri",
+        "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
+        "conversation": "ostatus:conversation",
+        "toot": "http://joinmastodon.org/ns#",
+        "Emoji": "toot:Emoji",
+        "focalPoint": {
+          "@container": "@list",
+          "@id": "toot:focalPoint"
+        },
+        "featured": {
+          "@id": "toot:featured",
+          "@type": "@id"
+        },
+        "schema": "http://schema.org#",
+        "PropertyValue": "schema:PropertyValue",
+        "value": "schema:value"
+      }
+    ],
+    "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948/activity",
+    "type": "Create",
+    "actor": "http://localhost:3000/users/ronan2",
+    "published": "2018-10-22T13:34:18Z",
+    "to": [
+      "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+      "http://localhost:3000/users/ronan2/followers",
+      "http://localhost:9000/accounts/ronan"
+    ],
+    "object": {
+      "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "type": "Note",
+      "summary": null,
+      "inReplyTo": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "published": "2018-10-22T13:34:18Z",
+      "url": "http://localhost:3000/@ronan2/100939547203370948",
+      "attributedTo": "http://localhost:3000/users/ronan2",
+      "to": [
+        "https://www.w3.org/ns/activitystreams#Public"
+      ],
+      "cc": [
+        "http://localhost:3000/users/ronan2/followers",
+        "http://localhost:9000/accounts/ronan"
+      ],
+      "sensitive": false,
+      "atomUri": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "inReplyToAtomUri": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "conversation": "tag:localhost:3000,2018-10-19:objectId=72:objectType=Conversation",
+      "content": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>",
+      "contentMap": {
+        "en": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>"
+      },
+      "attachment": [],
+      "tag": [
+        {
+          "type": "Mention",
+          "href": "http://localhost:9000/accounts/ronan",
+          "name": "@ronan@localhost:9000"
+        }
+      ]
+    },
+    "signature": {
+      "type": "RsaSignature2017",
+      "creator": "http://localhost:3000/users/ronan2#main-key",
+      "created": "2018-10-22T13:34:19Z",
+      "signatureValue": "x+xL4l8ERziYVhwEafHJyBQOInvNZ0gV4ccYd9AtFYeGJagc8fY6jjjhbDRCD7yMhgTjBX69z20MXnDuwpmM6wej3dt1wLKdIyXVViO84nAlqFz7KmNxtk5lDnAVX/vttscT5YUFvw4dbPT2mQiEd1lKbaLftRiIPEomZpQ37+fUkQdcPrnhruPAISO/Sof1n1LFW4mYIffozteQSZBH6HaCVp+MRMIhdMi5e8w7PD48/cZz8D/EU8Vqi91FM76/3tMqg6nLqQ+8bq74Jvt2kzwZlIufe+I55QMpZOmF6hGIJEt+R0JXdjQbtgcELONmNj2dr8sAlzu7zKlAGuJ24Q=="
+    }
+  }
+}
diff --git a/server/tests/api/activitypub/json/mastodon/bad-http-signature.json b/server/tests/api/activitypub/json/mastodon/bad-http-signature.json
new file mode 100644
index 000000000..098597db0
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/bad-http-signature.json
@@ -0,0 +1,93 @@
+{
+  "headers": {
+    "user-agent": "http.rb/3.3.0 (Mastodon/2.5.0; +http://localhost:3000/)",
+    "host": "localhost",
+    "date": "Mon, 22 Oct 2018 13:34:22 GMT",
+    "accept-encoding": "gzip",
+    "digest": "SHA-256=FEr5j2WSSfdEMcG3NTOXuGU0lUchfTJx4+BtUlWOwDk=",
+    "content-type": "application/activity+json",
+    "signature": "keyId=\"http://localhost:3000/users/ronan2#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest content-type\",signature=\"oLKbgxdFXdXsHJ3x/UsG9Svu7oa8Dyqiy6Jif4wqNuhAqRVMRaG18f+dd2OcfFX3XRGF8p8flZkU6vvoEQBauTwGRGcgXAJuKC1zYIWGk+PeiW8lNUnE4qGapWcTiFnIo7FKauNdsgqg/tvgs1pQIdHkDDjZMI64twP7sTN/4vG1PCq+kyqi/DM+ORLi/W7vFuLVHt2Iz7ikfw/R3/mMtS4FwLops+tVYBQ2iQ9DVRhTwLKVbeL/LLVB/tdGzNZ4F4nImBAQQ9I7WpPM6J/k+cBmoEbrUKs8ptx9gbX3OSsl4wlvPVMNzU9F9yb2MrB/Y/J4qssKz+LbiaktKGj7OQ==\"",
+    "content-length": "2815"
+  },
+  "body": {
+    "@context": [
+      "https://www.w3.org/ns/activitystreams",
+      "https://w3id.org/security/v1",
+      {
+        "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+        "sensitive": "as:sensitive",
+        "movedTo": {
+          "@id": "as:movedTo",
+          "@type": "@id"
+        },
+        "Hashtag": "as:Hashtag",
+        "ostatus": "http://ostatus.org#",
+        "atomUri": "ostatus:atomUri",
+        "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
+        "conversation": "ostatus:conversation",
+        "toot": "http://joinmastodon.org/ns#",
+        "Emoji": "toot:Emoji",
+        "focalPoint": {
+          "@container": "@list",
+          "@id": "toot:focalPoint"
+        },
+        "featured": {
+          "@id": "toot:featured",
+          "@type": "@id"
+        },
+        "schema": "http://schema.org#",
+        "PropertyValue": "schema:PropertyValue",
+        "value": "schema:value"
+      }
+    ],
+    "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948/activity",
+    "type": "Create",
+    "actor": "http://localhost:3000/users/ronan2",
+    "published": "2018-10-22T13:34:18Z",
+    "to": [
+      "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+      "http://localhost:3000/users/ronan2/followers",
+      "http://localhost:9000/accounts/ronan"
+    ],
+    "object": {
+      "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "type": "Note",
+      "summary": null,
+      "inReplyTo": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "published": "2018-10-22T13:34:18Z",
+      "url": "http://localhost:3000/@ronan2/100939547203370948",
+      "attributedTo": "http://localhost:3000/users/ronan2",
+      "to": [
+        "https://www.w3.org/ns/activitystreams#Public"
+      ],
+      "cc": [
+        "http://localhost:3000/users/ronan2/followers",
+        "http://localhost:9000/accounts/ronan"
+      ],
+      "sensitive": false,
+      "atomUri": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "inReplyToAtomUri": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "conversation": "tag:localhost:3000,2018-10-19:objectId=72:objectType=Conversation",
+      "content": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>",
+      "contentMap": {
+        "en": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>"
+      },
+      "attachment": [],
+      "tag": [
+        {
+          "type": "Mention",
+          "href": "http://localhost:9000/accounts/ronan",
+          "name": "@ronan@localhost:9000"
+        }
+      ]
+    },
+    "signature": {
+      "type": "RsaSignature2017",
+      "creator": "http://localhost:3000/users/ronan2#main-key",
+      "created": "2018-10-22T13:34:19Z",
+      "signatureValue": "x+xL4l8ERziYVhwEafHJyBQOInvNZ0gV4ccYd9AtFYeGJagc8fY6jjjhbDRCD7yMhgTjBX69z20MXnDuwpmM6wej3dt1wLKdIyXVViO84nAlqFz7KmNxtk5lDnAVX/vttscT5YUFvw4dbPT2mQiEd1lKbaLftRiIPEomZpQ37+fUkQdcPrnhruPAISO/Sof1n1LFW4mYIffozteQSZBH6HaCVp+MRMIhdMi5e8w7PD48/cZz8D/EU8Vqi91FM76/3tMqg6nLqQ+8bq74Jvt2kzwZlIufe+I55QMpZOmF6hGIJEt+R0JXdjQbtgcELONmNj2dr8sAlzu7zKlAGuJ24Q=="
+    }
+  }
+}
diff --git a/server/tests/api/activitypub/json/mastodon/bad-public-key.json b/server/tests/api/activitypub/json/mastodon/bad-public-key.json
new file mode 100644
index 000000000..73d18b3ad
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/bad-public-key.json
@@ -0,0 +1,3 @@
+{
+  "publicKey": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0YyuthHtWWgDe0Fdgdp2\ndC5dTJsRqW6pFw5omIYYYjoES/WRewhVxEA54BhmxD3L1zChfx131N1TS8jVowhW\nm999jpUffKCCvLgYKIXETJDHiDeMONVx8wp7v9fS1HiFXo/E5und39gUMs14CMFZ\n6PE5jRV3r4XIKQJHQl7/X5n5FOb2934K+1TKUeBkbft/AushlKatYQakt3qHxpwx\nFvE+JjGo7QTnzdjaOx/e5QvojdGi2Kx4+jl77j2WVcSo5lOBz04OAVJtChtn82vS\nulPdDh3hZcDn+WK67yAhGP6AnzvOybZZS4zowlKiQ3kqjVVXKdl8gAsL4Y7MZ40R\nJQIDAQAB\n-----END PUBLIC KEY-----\n"
+}
diff --git a/server/tests/api/activitypub/json/mastodon/create-bad-signature.json b/server/tests/api/activitypub/json/mastodon/create-bad-signature.json
new file mode 100644
index 000000000..2cd037241
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/create-bad-signature.json
@@ -0,0 +1,81 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://w3id.org/security/v1",
+    {
+      "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+      "sensitive": "as:sensitive",
+      "movedTo": {
+        "@id": "as:movedTo",
+        "@type": "@id"
+      },
+      "Hashtag": "as:Hashtag",
+      "ostatus": "http://ostatus.org#",
+      "atomUri": "ostatus:atomUri",
+      "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
+      "conversation": "ostatus:conversation",
+      "toot": "http://joinmastodon.org/ns#",
+      "Emoji": "toot:Emoji",
+      "focalPoint": {
+        "@container": "@list",
+        "@id": "toot:focalPoint"
+      },
+      "featured": {
+        "@id": "toot:featured",
+        "@type": "@id"
+      },
+      "schema": "http://schema.org#",
+      "PropertyValue": "schema:PropertyValue",
+      "value": "schema:value"
+    }
+  ],
+  "id": "http://localhost:3000/users/ronan2/statuses/100939345950887698/activity",
+  "type": "Create",
+  "actor": "http://localhost:3000/users/ronan2",
+  "published": "2018-10-22T12:43:07Z",
+  "to": [
+    "https://www.w3.org/ns/activitystreams#Public"
+  ],
+  "cc": [
+    "http://localhost:3000/users/ronan2/followers",
+    "http://localhost:9000/accounts/ronan"
+  ],
+  "object": {
+    "id": "http://localhost:3000/users/ronan2/statuses/100939345950887698",
+    "type": "Note",
+    "summary": null,
+    "inReplyTo": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+    "published": "2018-10-22T12:43:07Z",
+    "url": "http://localhost:3000/@ronan2/100939345950887698",
+    "attributedTo": "http://localhost:3000/users/ronan2",
+    "to": [
+      "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+      "http://localhost:3000/users/ronan2/followers",
+      "http://localhost:9000/accounts/ronan"
+    ],
+    "sensitive": false,
+    "atomUri": "http://localhost:3000/users/ronan2/statuses/100939345950887698",
+    "inReplyToAtomUri": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+    "conversation": "tag:localhost:3000,2018-10-19:objectId=72:objectType=Conversation",
+    "content": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zerg</p>",
+    "contentMap": {
+      "en": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zerg</p>"
+    },
+    "attachment": [],
+    "tag": [
+      {
+        "type": "Mention",
+        "href": "http://localhost:9000/accounts/ronan",
+        "name": "@ronan@localhost:9000"
+      }
+    ]
+  },
+  "signature": {
+    "type": "RsaSignature2017",
+    "creator": "http://localhost:3000/users/ronan2#main-key",
+    "created": "2018-10-22T12:43:08Z",
+    "signatureValue": "Vgr8nA0agPr9TcA4BlX+MWhmuE+rBcoIJLpnPbm3E5SnOCXbgjEfEaTLqfuzzkKNsR3PBbkvi3YWK4/DxJ0zmpzSB7yy4NRzluQMVQHqJiFKXAX3Sr3fIrK24xkWW9/F207c1NpFajSGbgnFKBdtFE0e5VqwSrSoOJkZukZW/2ATSnsyzblieuUmvTWpD0PqpUOsynPjw+RqZnqPn0cjw1z2Dm7ZRt3trnyMTXFYZw5U/YuqMY2kpadD6vq780md8kXlJIylxG6ZrlO2jz9fJdnfuVq43d4QFNsBm1K1r2WtNqX+i+wiqh+u3PjF4pzXtl/a3hJOH18IfZnK7I21mQ=="
+  }
+}
diff --git a/server/tests/api/activitypub/json/mastodon/create.json b/server/tests/api/activitypub/json/mastodon/create.json
new file mode 100644
index 000000000..0be271bb8
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/create.json
@@ -0,0 +1,81 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://w3id.org/security/v1",
+    {
+      "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+      "sensitive": "as:sensitive",
+      "movedTo": {
+        "@id": "as:movedTo",
+        "@type": "@id"
+      },
+      "Hashtag": "as:Hashtag",
+      "ostatus": "http://ostatus.org#",
+      "atomUri": "ostatus:atomUri",
+      "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
+      "conversation": "ostatus:conversation",
+      "toot": "http://joinmastodon.org/ns#",
+      "Emoji": "toot:Emoji",
+      "focalPoint": {
+        "@container": "@list",
+        "@id": "toot:focalPoint"
+      },
+      "featured": {
+        "@id": "toot:featured",
+        "@type": "@id"
+      },
+      "schema": "http://schema.org#",
+      "PropertyValue": "schema:PropertyValue",
+      "value": "schema:value"
+    }
+  ],
+  "id": "http://localhost:3000/users/ronan2/statuses/100939345950887698/activity",
+  "type": "Create",
+  "actor": "http://localhost:3000/users/ronan2",
+  "published": "2018-10-22T12:43:07Z",
+  "to": [
+    "https://www.w3.org/ns/activitystreams#Public"
+  ],
+  "cc": [
+    "http://localhost:3000/users/ronan2/followers",
+    "http://localhost:9000/accounts/ronan"
+  ],
+  "object": {
+    "id": "http://localhost:3000/users/ronan2/statuses/100939345950887698",
+    "type": "Note",
+    "summary": null,
+    "inReplyTo": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+    "published": "2018-10-22T12:43:07Z",
+    "url": "http://localhost:3000/@ronan2/100939345950887698",
+    "attributedTo": "http://localhost:3000/users/ronan2",
+    "to": [
+      "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+      "http://localhost:3000/users/ronan2/followers",
+      "http://localhost:9000/accounts/ronan"
+    ],
+    "sensitive": false,
+    "atomUri": "http://localhost:3000/users/ronan2/statuses/100939345950887698",
+    "inReplyToAtomUri": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+    "conversation": "tag:localhost:3000,2018-10-19:objectId=72:objectType=Conversation",
+    "content": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zerg</p>",
+    "contentMap": {
+      "en": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zerg</p>"
+    },
+    "attachment": [],
+    "tag": [
+      {
+        "type": "Mention",
+        "href": "http://localhost:9000/accounts/ronan",
+        "name": "@ronan@localhost:9000"
+      }
+    ]
+  },
+  "signature": {
+    "type": "RsaSignature2017",
+    "creator": "http://localhost:3000/users/ronan2#main-key",
+    "created": "2018-10-22T12:43:08Z",
+    "signatureValue": "VgR8nA0agPr9TcA4BlX+MWhmuE+rBcoIJLpnPbm3E5SnOCXbgjEfEaTLqfuzzkKNsR3PBbkvi3YWK4/DxJ0zmpzSB7yy4NRzluQMVQHqJiFKXAX3Sr3fIrK24xkWW9/F207c1NpFajSGbgnFKBdtFE0e5VqwSrSoOJkZukZW/2ATSnsyzblieuUmvTWpD0PqpUOsynPjw+RqZnqPn0cjw1z2Dm7ZRt3trnyMTXFYZw5U/YuqMY2kpadD6vq780md8kXlJIylxG6ZrlO2jz9fJdnfuVq43d4QFNsBm1K1r2WtNqX+i+wiqh+u3PjF4pzXtl/a3hJOH18IfZnK7I21mQ=="
+  }
+}
diff --git a/server/tests/api/activitypub/json/mastodon/http-signature.json b/server/tests/api/activitypub/json/mastodon/http-signature.json
new file mode 100644
index 000000000..4e7bc3af5
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/http-signature.json
@@ -0,0 +1,93 @@
+{
+  "headers": {
+    "user-agent": "http.rb/3.3.0 (Mastodon/2.5.0; +http://localhost:3000/)",
+    "host": "localhost",
+    "date": "Mon, 22 Oct 2018 13:34:22 GMT",
+    "accept-encoding": "gzip",
+    "digest": "SHA-256=FEr5j2WSSfdEMcG3NTOXuGU0lUchfTJx4+BtUlWOwDk=",
+    "content-type": "application/activity+json",
+    "signature": "keyId=\"http://localhost:3000/users/ronan2#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest content-type\",signature=\"oLKbgxdFXdXsHJ3x/UsG9Svu7oa8Dyqiy6Jif4wqNuhAqRVMRaG18f+dd2OcfFX3XRGF8p8flZkU6vvoEQBauTwGRGcgXAJuKC1zYIWGk+PeiW8lNUnE4qGapWcTiFnIo7FKauNdsgqg/tvgs1pQIdHkDDjZMI64twP7sTN/4vG1PCq+kyqi/DM+ORLi/W7vFuLVHt2Iz7ikfw/R3/mMtS4FwLops+tVYBQ2iQ9DVRhTwLKVbeL/LLVB/tdGzNZ4F4nImBAQQ9I7WpPM6J/k+cBmoEbrUKs8ptx9gbX3OSsl5wlvPVMNzU9F9yb2MrB/Y/J4qssKz+LbiaktKGj7OQ==\"",
+    "content-length": "2815"
+  },
+  "body": {
+    "@context": [
+      "https://www.w3.org/ns/activitystreams",
+      "https://w3id.org/security/v1",
+      {
+        "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+        "sensitive": "as:sensitive",
+        "movedTo": {
+          "@id": "as:movedTo",
+          "@type": "@id"
+        },
+        "Hashtag": "as:Hashtag",
+        "ostatus": "http://ostatus.org#",
+        "atomUri": "ostatus:atomUri",
+        "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
+        "conversation": "ostatus:conversation",
+        "toot": "http://joinmastodon.org/ns#",
+        "Emoji": "toot:Emoji",
+        "focalPoint": {
+          "@container": "@list",
+          "@id": "toot:focalPoint"
+        },
+        "featured": {
+          "@id": "toot:featured",
+          "@type": "@id"
+        },
+        "schema": "http://schema.org#",
+        "PropertyValue": "schema:PropertyValue",
+        "value": "schema:value"
+      }
+    ],
+    "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948/activity",
+    "type": "Create",
+    "actor": "http://localhost:3000/users/ronan2",
+    "published": "2018-10-22T13:34:18Z",
+    "to": [
+      "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+      "http://localhost:3000/users/ronan2/followers",
+      "http://localhost:9000/accounts/ronan"
+    ],
+    "object": {
+      "id": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "type": "Note",
+      "summary": null,
+      "inReplyTo": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "published": "2018-10-22T13:34:18Z",
+      "url": "http://localhost:3000/@ronan2/100939547203370948",
+      "attributedTo": "http://localhost:3000/users/ronan2",
+      "to": [
+        "https://www.w3.org/ns/activitystreams#Public"
+      ],
+      "cc": [
+        "http://localhost:3000/users/ronan2/followers",
+        "http://localhost:9000/accounts/ronan"
+      ],
+      "sensitive": false,
+      "atomUri": "http://localhost:3000/users/ronan2/statuses/100939547203370948",
+      "inReplyToAtomUri": "http://localhost:9000/videos/watch/90e6f8ed-b369-423c-b0c8-f44e5350c752",
+      "conversation": "tag:localhost:3000,2018-10-19:objectId=72:objectType=Conversation",
+      "content": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>",
+      "contentMap": {
+        "en": "<p><span class=\"h-card\"><a href=\"http://localhost:9000/accounts/ronan\" class=\"u-url mention\">@<span>ronan</span></a></span> zergzerg</p>"
+      },
+      "attachment": [],
+      "tag": [
+        {
+          "type": "Mention",
+          "href": "http://localhost:9000/accounts/ronan",
+          "name": "@ronan@localhost:9000"
+        }
+      ]
+    },
+    "signature": {
+      "type": "RsaSignature2017",
+      "creator": "http://localhost:3000/users/ronan2#main-key",
+      "created": "2018-10-22T13:34:19Z",
+      "signatureValue": "x+xL4l8ERziYVhwEafHJyBQOInvNZ0gV4ccYd9AtFYeGJagc8fY6jjjhbDRCD7yMhgTjBX69z20MXnDuwpmM6wej3dt1wLKdIyXVViO84nAlqFz7KmNxtk5lDnAVX/vttscT5YUFvw4dbPT2mQiEd1lKbaLftRiIPEomZpQ37+fUkQdcPrnhruPAISO/Sof1n1LFW4mYIffozteQSZBH6HaCVp+MRMIhdMi5e8w7PD48/cZz8D/EU8Vqi91FM76/3tMqg6nLqQ+8bq74Jvt2kzwZlIufe+I55QMpZOmF6hGIJEt+R0JXdjQbtgcELONmNj2dr8sAlzu7zKlAGuJ24Q=="
+    }
+  }
+}
diff --git a/server/tests/api/activitypub/json/mastodon/public-key.json b/server/tests/api/activitypub/json/mastodon/public-key.json
new file mode 100644
index 000000000..b7b9b8308
--- /dev/null
+++ b/server/tests/api/activitypub/json/mastodon/public-key.json
@@ -0,0 +1,3 @@
+{
+  "publicKey": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0YyuthHtWWgDe0Fdgdp2\ndC5dTJsRqW6pFw5omIYYYjoES/WRewhVxEA54BhmxD3L1zChfx131N1TS8jVowhW\nm999jpUffKCCvLgYKIXETJDHiDeMONVx8wp7v9fS1HiFXo/E5und39gUMs14CMFZ\n6PE5jRV3r4XIKQJHQl7/X5n5FOb2934K+1TKUeBkbft/AushlKatYQakt3qHxpwx\nFvE+JjGo7QTnzdjaOx/e5QvojdGi2Kx4+jl87j2WVcSo5lOBz04OAVJtChtn82vS\nulPdDh3hZcDn+WK67yAhGP6AnzvOybZZS4zowlKiQ3kqjVVXKdl8gAsL4Y7MZ40R\nJQIDAQAB\n-----END PUBLIC KEY-----\n"
+}
diff --git a/server/tests/api/activitypub/json/peertube/announce-without-context.json b/server/tests/api/activitypub/json/peertube/announce-without-context.json
new file mode 100644
index 000000000..5f2af0cde
--- /dev/null
+++ b/server/tests/api/activitypub/json/peertube/announce-without-context.json
@@ -0,0 +1,13 @@
+{
+  "type": "Announce",
+  "id": "http://localhost:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05/announces/1",
+  "actor": "http://localhost:9002/accounts/peertube",
+  "object": "http://localhost:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05",
+  "to": [
+    "https://www.w3.org/ns/activitystreams#Public",
+    "http://localhost:9002/accounts/peertube/followers",
+    "http://localhost:9002/video-channels/root_channel/followers",
+    "http://localhost:9002/accounts/root/followers"
+  ],
+  "cc": []
+}
diff --git a/server/tests/api/activitypub/json/peertube/invalid-keys.json b/server/tests/api/activitypub/json/peertube/invalid-keys.json
new file mode 100644
index 000000000..0544e96b9
--- /dev/null
+++ b/server/tests/api/activitypub/json/peertube/invalid-keys.json
@@ -0,0 +1,6 @@
+{
+  "publicKey": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqjQGdH6D3naKmSbbr/Df\nEh1H42F3WlHYXuxKLkm5Bemjdde+GwHYdz5m3fcIWw3HTzfA+y9Of8epGdfSrtYO\nwAyc3Zoy7afPNa4bZXqhJ1Im41rMGieiCuUn4uTPPucIjC0gCkVwvuQr3Elbk55s\nIkczDkseJuadTvG+A1e4uNY2lnRmVhf4g5B90u6CLe2KdbPpifRoKlw9zaUBj4/F\npP5S75TS5l1DfJQIq2lp8RwrH6FvGKLnWlbGeNYX96DDvlA5Sxoxz6a+bTV9OopM\n7mS7eP8zF8lKXYUu8cjIscKm+XqGmyRoPyw2Pp53tew29idRUocVQHGBnlNbpKdd\naQIDAQAB\n-----END PUBLIC KEY-----\n",
+  "privateKey": "-----BEGIN RSA PRIVATE KEY-----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\nfp/gA9sVgp38QSr+xB9E0LNStcbqDzoCCcDRws/SK7PbkQH9KV47tQ==\n-----END RSA PRIVATE KEY-----"
+}
+
+
diff --git a/server/tests/api/activitypub/json/peertube/keys.json b/server/tests/api/activitypub/json/peertube/keys.json
new file mode 100644
index 000000000..1a7700865
--- /dev/null
+++ b/server/tests/api/activitypub/json/peertube/keys.json
@@ -0,0 +1,4 @@
+{
+  "publicKey": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqjQGdH6D3naKmSbbr/Df\nEh1H42F3WlHYXuxKLkm5Bemjdde+GwHYdz5m3fcIWw3HTzfA+y9Of8epGdfSrtYO\nwAyc3Zoy7afPNa4bZXqhJ1Im41rMGieiCuUn4uTPPucIjC0gCkVwvuQr3Elbk55s\nIkczDkseJuadTvG+A1e4uNY2lnRmVhf4g5B90u6CLe2KdbPpifRoKlw9zaUBj4/F\npP5S75TS5l1DfJQIq2lp8RwrH6FvGKLnWlbGeNYX96DDvlA5Sxoxz6a+bTV9OopM\n7mS7eP8zF8lKXYUu8cjIscKm+XqGmyRoPyw3Pp53tew29idRUocVQHGBnlNbpKdd\naQIDAQAB\n-----END PUBLIC KEY-----\n",
+  "privateKey": "-----BEGIN RSA PRIVATE KEY-----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\nfp/gA9sVgp38QSr+xB9E0LNStcbqDzoCCcDRws/SK7PbkQH9KV47tQ==\n-----END RSA PRIVATE KEY-----"
+}
diff --git a/server/tests/api/activitypub/security.ts b/server/tests/api/activitypub/security.ts
new file mode 100644
index 000000000..e7899bb14
--- /dev/null
+++ b/server/tests/api/activitypub/security.ts
@@ -0,0 +1,180 @@
+/* tslint:disable:no-unused-expression */
+
+import 'mocha'
+
+import { flushAndRunMultipleServers, flushTests, killallServers, makePOSTAPRequest, makeFollowRequest, ServerInfo } from '../../utils'
+import { HTTP_SIGNATURE } from '../../../initializers'
+import { buildDigest, buildGlobalHeaders } from '../../../lib/job-queue/handlers/utils/activitypub-http-utils'
+import * as chai from 'chai'
+import { setActorField } from '../../utils/miscs/sql'
+import { activityPubContextify, buildSignedActivity } from '../../../helpers/activitypub'
+
+const expect = chai.expect
+
+function setKeysOfServer2 (serverNumber: number, publicKey: string, privateKey: string) {
+  return Promise.all([
+    setActorField(serverNumber, 'http://localhost:9002/accounts/peertube', 'publicKey', publicKey),
+    setActorField(serverNumber, 'http://localhost:9002/accounts/peertube', 'privateKey', privateKey)
+  ])
+}
+
+function setKeysOfServer3 (serverNumber: number, publicKey: string, privateKey: string) {
+  return Promise.all([
+    setActorField(serverNumber, 'http://localhost:9003/accounts/peertube', 'publicKey', publicKey),
+    setActorField(serverNumber, 'http://localhost:9003/accounts/peertube', 'privateKey', privateKey)
+  ])
+}
+
+describe('Test ActivityPub security', function () {
+  let servers: ServerInfo[]
+  let url: string
+
+  const keys = require('./json/peertube/keys.json')
+  const invalidKeys = require('./json/peertube/invalid-keys.json')
+  const baseHttpSignature = {
+    algorithm: HTTP_SIGNATURE.ALGORITHM,
+    authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME,
+    keyId: 'acct:peertube@localhost:9002',
+    key: keys.privateKey,
+    headers: HTTP_SIGNATURE.HEADERS_TO_SIGN
+  }
+
+  // ---------------------------------------------------------------
+
+  before(async function () {
+    this.timeout(60000)
+
+    servers = await flushAndRunMultipleServers(3)
+
+    url = servers[0].url + '/inbox'
+
+    await setKeysOfServer2(1, keys.publicKey, keys.privateKey)
+
+    const to = { url: 'http://localhost:9001/accounts/peertube' }
+    const by = { url: 'http://localhost:9002/accounts/peertube', privateKey: keys.privateKey }
+    await makeFollowRequest(to, by)
+  })
+
+  describe('When checking HTTP signature', function () {
+
+    it('Should fail with an invalid digest', async function () {
+      const body = activityPubContextify(require('./json/peertube/announce-without-context.json'))
+      const headers = {
+        Digest: buildDigest({ hello: 'coucou' })
+      }
+
+      const { response } = await makePOSTAPRequest(url, body, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(403)
+    })
+
+    it('Should fail with an invalid date', async function () {
+      const body = activityPubContextify(require('./json/peertube/announce-without-context.json'))
+      const headers = buildGlobalHeaders(body)
+      headers['date'] = 'Wed, 21 Oct 2015 07:28:00 GMT'
+
+      const { response } = await makePOSTAPRequest(url, body, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(403)
+    })
+
+    it('Should fail with bad keys', async function () {
+      await setKeysOfServer2(1, invalidKeys.publicKey, invalidKeys.privateKey)
+      await setKeysOfServer2(2, invalidKeys.publicKey, invalidKeys.privateKey)
+
+      const body = activityPubContextify(require('./json/peertube/announce-without-context.json'))
+      const headers = buildGlobalHeaders(body)
+
+      const { response } = await makePOSTAPRequest(url, body, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(403)
+    })
+
+    it('Should succeed with a valid HTTP signature', async function () {
+      await setKeysOfServer2(1, keys.publicKey, keys.privateKey)
+      await setKeysOfServer2(2, keys.publicKey, keys.privateKey)
+
+      const body = activityPubContextify(require('./json/peertube/announce-without-context.json'))
+      const headers = buildGlobalHeaders(body)
+
+      const { response } = await makePOSTAPRequest(url, body, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(204)
+    })
+  })
+
+  describe('When checking Linked Data Signature', function () {
+    before(async () => {
+      await setKeysOfServer3(3, keys.publicKey, keys.privateKey)
+
+      const to = { url: 'http://localhost:9001/accounts/peertube' }
+      const by = { url: 'http://localhost:9003/accounts/peertube', privateKey: keys.privateKey }
+      await makeFollowRequest(to, by)
+    })
+
+    it('Should fail with bad keys', async function () {
+      this.timeout(10000)
+
+      await setKeysOfServer3(1, invalidKeys.publicKey, invalidKeys.privateKey)
+      await setKeysOfServer3(3, invalidKeys.publicKey, invalidKeys.privateKey)
+
+      const body = require('./json/peertube/announce-without-context.json')
+      body.actor = 'http://localhost:9003/accounts/peertube'
+
+      const signer: any = { privateKey: invalidKeys.privateKey, url: 'http://localhost:9003/accounts/peertube' }
+      const signedBody = await buildSignedActivity(signer, body)
+
+      const headers = buildGlobalHeaders(signedBody)
+
+      const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(403)
+    })
+
+    it('Should fail with an altered body', async function () {
+      this.timeout(10000)
+
+      await setKeysOfServer3(1, keys.publicKey, keys.privateKey)
+      await setKeysOfServer3(3, keys.publicKey, keys.privateKey)
+
+      const body = require('./json/peertube/announce-without-context.json')
+      body.actor = 'http://localhost:9003/accounts/peertube'
+
+      const signer: any = { privateKey: keys.privateKey, url: 'http://localhost:9003/accounts/peertube' }
+      const signedBody = await buildSignedActivity(signer, body)
+
+      signedBody.actor = 'http://localhost:9003/account/peertube'
+
+      const headers = buildGlobalHeaders(signedBody)
+
+      const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(403)
+    })
+
+    it('Should succeed with a valid signature', async function () {
+      this.timeout(10000)
+
+      const body = require('./json/peertube/announce-without-context.json')
+      body.actor = 'http://localhost:9003/accounts/peertube'
+
+      const signer: any = { privateKey: keys.privateKey, url: 'http://localhost:9003/accounts/peertube' }
+      const signedBody = await buildSignedActivity(signer, body)
+
+      const headers = buildGlobalHeaders(signedBody)
+
+      const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature, headers)
+
+      expect(response.statusCode).to.equal(204)
+    })
+  })
+
+  after(async function () {
+    killallServers(servers)
+
+    // Keep the logs if the test failed
+    if (this['ok']) {
+      await flushTests()
+    }
+  })
+})
diff --git a/server/tests/api/index-4.ts b/server/tests/api/index-4.ts
index 8e69b95a6..7d8be2b3d 100644
--- a/server/tests/api/index-4.ts
+++ b/server/tests/api/index-4.ts
@@ -1 +1,2 @@
 import './redundancy'
+import './activitypub'
diff --git a/server/tests/api/redundancy/redundancy.ts b/server/tests/api/redundancy/redundancy.ts
index 0af52023c..663e31ead 100644
--- a/server/tests/api/redundancy/redundancy.ts
+++ b/server/tests/api/redundancy/redundancy.ts
@@ -54,7 +54,7 @@ async function runServers (strategy: VideoRedundancyStrategy, additionalParams:
           immutableAssign({
             min_lifetime: '1 hour',
             strategy: strategy,
-            size: '100KB'
+            size: '200KB'
           }, additionalParams)
         ]
       }
@@ -111,8 +111,8 @@ async function checkStatsWith2Webseed (strategy: VideoRedundancyStrategy) {
   const stat = data.videosRedundancy[0]
 
   expect(stat.strategy).to.equal(strategy)
-  expect(stat.totalSize).to.equal(102400)
-  expect(stat.totalUsed).to.be.at.least(1).and.below(102401)
+  expect(stat.totalSize).to.equal(204800)
+  expect(stat.totalUsed).to.be.at.least(1).and.below(204801)
   expect(stat.totalVideoFiles).to.equal(4)
   expect(stat.totalVideos).to.equal(1)
 }
@@ -125,7 +125,7 @@ async function checkStatsWith1Webseed (strategy: VideoRedundancyStrategy) {
 
   const stat = data.videosRedundancy[0]
   expect(stat.strategy).to.equal(strategy)
-  expect(stat.totalSize).to.equal(102400)
+  expect(stat.totalSize).to.equal(204800)
   expect(stat.totalUsed).to.equal(0)
   expect(stat.totalVideoFiles).to.equal(0)
   expect(stat.totalVideos).to.equal(0)
@@ -223,7 +223,7 @@ describe('Test videos redundancy', function () {
       return enableRedundancyOnServer1()
     })
 
-    it('Should have 2 webseed on the first video', async function () {
+    it('Should have 2 webseeds on the first video', async function () {
       this.timeout(40000)
 
       await waitJobs(servers)
@@ -270,7 +270,7 @@ describe('Test videos redundancy', function () {
       return enableRedundancyOnServer1()
     })
 
-    it('Should have 2 webseed on the first video', async function () {
+    it('Should have 2 webseeds on the first video', async function () {
       this.timeout(40000)
 
       await waitJobs(servers)
@@ -338,7 +338,7 @@ describe('Test videos redundancy', function () {
       await waitJobs(servers)
     })
 
-    it('Should have 2 webseed on the first video', async function () {
+    it('Should have 2 webseeds on the first video', async function () {
       this.timeout(40000)
 
       await waitJobs(servers)
@@ -419,7 +419,7 @@ describe('Test videos redundancy', function () {
 
       killallServers([ servers[0] ])
 
-      await wait(10000)
+      await wait(15000)
 
       await checkNotContains([ servers[1], servers[2] ], 'http%3A%2F%2Flocalhost%3A9001')
     })
@@ -451,27 +451,23 @@ describe('Test videos redundancy', function () {
       video2Server2UUID = res.body.video.uuid
     })
 
-    it('Should cache video 2 webseed on the first video', async function () {
-      this.timeout(50000)
+    it('Should cache video 2 webseeds on the first video', async function () {
+      this.timeout(120000)
 
       await waitJobs(servers)
 
-      await wait(7000)
+      let checked = false
 
-      try {
-        await check1WebSeed(strategy, video1Server2UUID)
-        await check2Webseeds(strategy, video2Server2UUID)
-      } catch {
-        await wait(3000)
+      while (checked === false) {
+        await wait(1000)
 
         try {
           await check1WebSeed(strategy, video1Server2UUID)
           await check2Webseeds(strategy, video2Server2UUID)
-        } catch {
-          await wait(5000)
 
-          await check1WebSeed(strategy, video1Server2UUID)
-          await check2Webseeds(strategy, video2Server2UUID)
+          checked = true
+        } catch {
+          checked = false
         }
       }
     })
diff --git a/server/tests/api/server/handle-down.ts b/server/tests/api/server/handle-down.ts
index e6e0d6c7a..8e162b69e 100644
--- a/server/tests/api/server/handle-down.ts
+++ b/server/tests/api/server/handle-down.ts
@@ -5,6 +5,7 @@ import 'mocha'
 import { JobState, Video } from '../../../../shared/models'
 import { VideoPrivacy } from '../../../../shared/models/videos'
 import { VideoCommentThreadTree } from '../../../../shared/models/videos/video-comment.model'
+
 import {
   completeVideoCheck,
   getVideo,
@@ -18,6 +19,7 @@ import {
   ServerInfo,
   setAccessTokensToServers,
   uploadVideo,
+  updateVideo,
   wait
 } from '../../../../shared/utils'
 import { follow, getFollowersListPaginationAndSort } from '../../../../shared/utils/server/follows'
@@ -199,15 +201,15 @@ describe('Test handle downs', function () {
     expect(res.body.data).to.have.lengthOf(2)
   })
 
-  it('Should send a view to server 3, and automatically fetch the video', async function () {
+  it('Should send an update to server 3, and automatically fetch the video', async function () {
     this.timeout(15000)
 
     const res1 = await getVideosList(servers[2].url)
     expect(res1.body.data).to.be.an('array')
     expect(res1.body.data).to.have.lengthOf(11)
 
-    await viewVideo(servers[0].url, missedVideo1.uuid)
-    await viewVideo(servers[0].url, unlistedVideo.uuid)
+    await updateVideo(servers[0].url, servers[0].accessToken, missedVideo1.uuid, { })
+    await updateVideo(servers[0].url, servers[0].accessToken, unlistedVideo.uuid, { })
 
     await waitJobs(servers)
 
diff --git a/server/tests/api/server/index.ts b/server/tests/api/server/index.ts
index eeb8b7a28..78ab7e18b 100644
--- a/server/tests/api/server/index.ts
+++ b/server/tests/api/server/index.ts
@@ -6,3 +6,4 @@ import './jobs'
 import './reverse-proxy'
 import './stats'
 import './tracker'
+import './no-client'
diff --git a/server/tests/api/server/no-client.ts b/server/tests/api/server/no-client.ts
new file mode 100644
index 000000000..6d6ce8532
--- /dev/null
+++ b/server/tests/api/server/no-client.ts
@@ -0,0 +1,36 @@
+import 'mocha'
+import * as request from 'supertest'
+import {
+  flushTests,
+  killallServers,
+  ServerInfo
+} from '../../utils/index'
+import { runServer } from '../../utils/server/servers'
+
+describe('Start and stop server without web client routes', function () {
+  let server: ServerInfo
+
+  before(async function () {
+    this.timeout(30000)
+
+    await flushTests()
+
+    server = await runServer(1, {}, ['--no-client'])
+  })
+
+  it('Should fail getting the client', function () {
+    const req = request(server.url)
+      .get('/')
+
+    return req.expect(404)
+  })
+
+  after(async function () {
+    killallServers([ server ])
+
+    // Keep the logs if the test failed
+    if (this['ok']) {
+      await flushTests()
+    }
+  })
+})
diff --git a/server/tests/cli/peertube.ts b/server/tests/cli/peertube.ts
index e5038838e..e2836d0c3 100644
--- a/server/tests/cli/peertube.ts
+++ b/server/tests/cli/peertube.ts
@@ -44,6 +44,8 @@ describe('Test CLI wrapper', function () {
   })
 
   after(async function () {
+    this.timeout(10000)
+
     await execCLI(cmd + ` auth del ${server.url}`)
 
     killallServers([ server ])
diff --git a/server/tests/index.ts b/server/tests/index.ts
index e659fd3df..ed16d65dd 100644
--- a/server/tests/index.ts
+++ b/server/tests/index.ts
@@ -1,6 +1,5 @@
 // Order of the tests we want to execute
 import './client'
-import './activitypub'
 import './feeds/'
 import './cli/'
 import './api/'
diff --git a/server/tests/utils/miscs/sql.ts b/server/tests/utils/miscs/sql.ts
new file mode 100644
index 000000000..027f78131
--- /dev/null
+++ b/server/tests/utils/miscs/sql.ts
@@ -0,0 +1,38 @@
+import * as Sequelize from 'sequelize'
+
+function getSequelize (serverNumber: number) {
+  const dbname = 'peertube_test' + serverNumber
+  const username = 'peertube'
+  const password = 'peertube'
+  const host = 'localhost'
+  const port = 5432
+
+  return new Sequelize(dbname, username, password, {
+    dialect: 'postgres',
+    host,
+    port,
+    operatorsAliases: false,
+    logging: false
+  })
+}
+
+function setActorField (serverNumber: number, to: string, field: string, value: string) {
+  const seq = getSequelize(serverNumber)
+
+  const options = { type: Sequelize.QueryTypes.UPDATE }
+
+  return seq.query(`UPDATE actor SET "${field}" = '${value}' WHERE url = '${to}'`, options)
+}
+
+function setVideoField (serverNumber: number, uuid: string, field: string, value: string) {
+  const seq = getSequelize(serverNumber)
+
+  const options = { type: Sequelize.QueryTypes.UPDATE }
+
+  return seq.query(`UPDATE video SET "${field}" = '${value}' WHERE uuid = '${uuid}'`, options)
+}
+
+export {
+  setVideoField,
+  setActorField
+}
diff --git a/server/tests/utils/miscs/stubs.ts b/server/tests/utils/miscs/stubs.ts
new file mode 100644
index 000000000..d1eb0e3b2
--- /dev/null
+++ b/server/tests/utils/miscs/stubs.ts
@@ -0,0 +1,14 @@
+function buildRequestStub (): any {
+  return { }
+}
+
+function buildResponseStub (): any {
+  return {
+    locals: {}
+  }
+}
+
+export {
+  buildResponseStub,
+  buildRequestStub
+}
diff --git a/server/tests/utils/requests/activitypub.ts b/server/tests/utils/requests/activitypub.ts
new file mode 100644
index 000000000..96fee60a8
--- /dev/null
+++ b/server/tests/utils/requests/activitypub.ts
@@ -0,0 +1,43 @@
+import { doRequest } from '../../../helpers/requests'
+import { HTTP_SIGNATURE } from '../../../initializers'
+import { buildGlobalHeaders } from '../../../lib/job-queue/handlers/utils/activitypub-http-utils'
+import { activityPubContextify } from '../../../helpers/activitypub'
+
+function makePOSTAPRequest (url: string, body: any, httpSignature: any, headers: any) {
+  const options = {
+    method: 'POST',
+    uri: url,
+    json: body,
+    httpSignature,
+    headers
+  }
+
+  return doRequest(options)
+}
+
+async function makeFollowRequest (to: { url: string }, by: { url: string, privateKey }) {
+  const follow = {
+    type: 'Follow',
+    id: by.url + '/toto',
+    actor: by.url,
+    object: to.url
+  }
+
+  const body = activityPubContextify(follow)
+
+  const httpSignature = {
+    algorithm: HTTP_SIGNATURE.ALGORITHM,
+    authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME,
+    keyId: by.url,
+    key: by.privateKey,
+    headers: HTTP_SIGNATURE.HEADERS_TO_SIGN
+  }
+  const headers = buildGlobalHeaders(body)
+
+  return makePOSTAPRequest(to.url, body, httpSignature, headers)
+}
+
+export {
+  makePOSTAPRequest,
+  makeFollowRequest
+}
diff --git a/server/tools/peertube-auth.ts b/server/tools/peertube-auth.ts
index 33438811e..a962944a4 100644
--- a/server/tools/peertube-auth.ts
+++ b/server/tools/peertube-auth.ts
@@ -5,34 +5,25 @@ import { getSettings, writeSettings, netrc } from './cli'
 import { isHostValid } from '../helpers/custom-validators/servers'
 import { isUserUsernameValid } from '../helpers/custom-validators/users'
 
-function delInstance (url: string) {
-  return new Promise((res, rej): void => {
-    getSettings()
-      .then(async (settings) => {
-        settings.remotes.splice(settings.remotes.indexOf(url))
-        await writeSettings(settings)
-        delete netrc.machines[url]
-        netrc.save()
-        res()
-      })
-      .catch(err => rej(err))
-  })
+async function delInstance (url: string) {
+  const settings = await getSettings()
+
+  settings.remotes.splice(settings.remotes.indexOf(url))
+  await writeSettings(settings)
+
+  delete netrc.machines[url]
+  await netrc.save()
 }
 
 async function setInstance (url: string, username: string, password: string) {
-  return new Promise((res, rej): void => {
-    getSettings()
-      .then(async settings => {
-        if (settings.remotes.indexOf(url) === -1) {
-          settings.remotes.push(url)
-        }
-        await writeSettings(settings)
-        netrc.machines[url] = { login: username, password }
-        netrc.save()
-        res()
-      })
-      .catch(err => rej(err))
-  })
+  const settings = await getSettings()
+  if (settings.remotes.indexOf(url) === -1) {
+    settings.remotes.push(url)
+  }
+  await writeSettings(settings)
+
+  netrc.machines[url] = { login: username, password }
+  await netrc.save()
 }
 
 function isURLaPeerTubeInstance (url: string) {
@@ -71,56 +62,60 @@ program
           required: true
         }
       }
-    }, (_, result) => {
-      setInstance(result.url, result.username, result.password)
+    }, async (_, result) => {
+      await setInstance(result.url, result.username, result.password)
+
+      process.exit(0)
     })
   })
 
 program
   .command('del <url>')
   .description('unregisters a remote instance')
-  .action((url) => {
-    delInstance(url)
+  .action(async url => {
+    await delInstance(url)
+
+    process.exit(0)
   })
 
 program
   .command('list')
   .description('lists registered remote instances')
-  .action(() => {
-    getSettings()
-      .then(settings => {
-        const table = new Table({
-          head: ['instance', 'login'],
-          colWidths: [30, 30]
-        })
-        netrc.loadSync()
-        settings.remotes.forEach(element => {
-          table.push([
-            element,
-            netrc.machines[element].login
-          ])
-        })
-
-        console.log(table.toString())
-      })
+  .action(async () => {
+    const settings = await getSettings()
+    const table = new Table({
+      head: ['instance', 'login'],
+      colWidths: [30, 30]
+    })
+    netrc.loadSync()
+    settings.remotes.forEach(element => {
+      table.push([
+        element,
+        netrc.machines[element].login
+      ])
+    })
+
+    console.log(table.toString())
+
+    process.exit(0)
   })
 
 program
   .command('set-default <url>')
   .description('set an existing entry as default')
-  .action((url) => {
-    getSettings()
-      .then(settings => {
-        const instanceExists = settings.remotes.indexOf(url) !== -1
-
-        if (instanceExists) {
-          settings.default = settings.remotes.indexOf(url)
-          writeSettings(settings)
-        } else {
-          console.log('<url> is not a registered instance.')
-          process.exit(-1)
-        }
-      })
+  .action(async url => {
+    const settings = await getSettings()
+    const instanceExists = settings.remotes.indexOf(url) !== -1
+
+    if (instanceExists) {
+      settings.default = settings.remotes.indexOf(url)
+      await writeSettings(settings)
+
+      process.exit(0)
+    } else {
+      console.log('<url> is not a registered instance.')
+      process.exit(-1)
+    }
   })
 
 program.on('--help', function () {
diff --git a/server/tools/peertube.ts b/server/tools/peertube.ts
index c8b9fa744..5d3ab2815 100755
--- a/server/tools/peertube.ts
+++ b/server/tools/peertube.ts
@@ -58,7 +58,7 @@ if (!process.argv.slice(2).length) {
             ,"\\/
       _,.__/"\\/_                     (the CLI for red chocobos)
      / \\) "./,  ".
-  --/---"---" "-) )---- by Chocobozzz et al.`)
+  --/---"---" "-) )---- by Chocobozzz et al.\n`)
 }
 
 getSettings()