16 files changed, 122 insertions, 47 deletions

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..920d02cd2 100644
--- a/server/lib/activitypub/process/process-create.ts
+++ b/server/lib/activitypub/process/process-create.ts
@@ -12,6 +12,8 @@ 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, getVideoLikeActivityPubUrl } from '../url'
 
 async function processCreateActivity (activity: ActivityCreate, byActor: ActorModel) {
   const activityObject = activity.object
@@ -65,9 +67,10 @@ 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 })
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),