server/lib/activitypub/actors/shared/url-to-object.ts

   1 import { sanitizeAndCheckActorObject } from '@server/helpers/custom-validators/activitypub/actor'
   2 import { logger } from '@server/helpers/logger'
   3 import { doJSONRequest } from '@server/helpers/requests'
   4 import { ActivityPubActor, ActivityPubOrderedCollection } from '@shared/models'
   5 import { checkUrlsSameHost } from '../../url'
   6
   7 async function fetchRemoteActor (actorUrl: string): Promise<{ statusCode: number, actorObject: ActivityPubActor }> {
   8   logger.info('Fetching remote actor %s.', actorUrl)
   9
  10   const { body, statusCode } = await doJSONRequest<ActivityPubActor>(actorUrl, { activityPub: true })
  11
  12   if (sanitizeAndCheckActorObject(body) === false) {
  13     logger.debug('Remote actor JSON is not valid.', { actorJSON: body })
  14     return { actorObject: undefined, statusCode: statusCode }
  15   }
  16
  17   if (checkUrlsSameHost(body.id, actorUrl) !== true) {
  18     logger.warn('Actor url %s has not the same host than its AP id %s', actorUrl, body.id)
  19     return { actorObject: undefined, statusCode: statusCode }
  20   }
  21
  22   return {
  23     statusCode,
  24
  25     actorObject: body
  26   }
  27 }
  28
  29 async function fetchActorFollowsCount (actorObject: ActivityPubActor) {
  30   const followersCount = await fetchActorTotalItems(actorObject.followers)
  31   const followingCount = await fetchActorTotalItems(actorObject.following)
  32
  33   return { followersCount, followingCount }
  34 }
  35
  36 // ---------------------------------------------------------------------------
  37 export {
  38   fetchActorFollowsCount,
  39   fetchRemoteActor
  40 }
  41
  42 // ---------------------------------------------------------------------------
  43
  44 async function fetchActorTotalItems (url: string) {
  45   try {
  46     const { body } = await doJSONRequest<ActivityPubOrderedCollection<unknown>>(url, { activityPub: true })
  47
  48     return body.totalItems || 0
  49   } catch (err) {
  50     logger.warn('Cannot fetch remote actor count %s.', url, { err })
  51     return 0
  52   }
  53 }