63 lines
1.7 KiB
TypeScript
63 lines
1.7 KiB
TypeScript
import { ACTIVITY_PUB, JOB_REQUEST_TIMEOUT, WEBSERVER } from '../../initializers/constants'
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import { doRequest } from '../../helpers/requests'
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import { logger } from '../../helpers/logger'
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import * as Bluebird from 'bluebird'
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import { ActivityPubOrderedCollection } from '../../../shared/models/activitypub'
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import { parse } from 'url'
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type HandlerFunction<T> = (items: T[]) => (Promise<any> | Bluebird<any>)
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type CleanerFunction = (startedDate: Date) => (Promise<any> | Bluebird<any>)
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async function crawlCollectionPage <T> (uri: string, handler: HandlerFunction<T>, cleaner?: CleanerFunction) {
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logger.info('Crawling ActivityPub data on %s.', uri)
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const options = {
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method: 'GET',
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uri,
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json: true,
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activityPub: true,
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timeout: JOB_REQUEST_TIMEOUT
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}
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const startDate = new Date()
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const response = await doRequest<ActivityPubOrderedCollection<T>>(options)
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const firstBody = response.body
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let limit = ACTIVITY_PUB.FETCH_PAGE_LIMIT
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let i = 0
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let nextLink = firstBody.first
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while (nextLink && i < limit) {
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let body: any
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if (typeof nextLink === 'string') {
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// Don't crawl ourselves
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const remoteHost = parse(nextLink).host
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if (remoteHost === WEBSERVER.HOST) continue
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options.uri = nextLink
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const res = await doRequest<ActivityPubOrderedCollection<T>>(options)
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body = res.body
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} else {
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// nextLink is already the object we want
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body = nextLink
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}
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nextLink = body.next
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i++
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if (Array.isArray(body.orderedItems)) {
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const items = body.orderedItems
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logger.info('Processing %i ActivityPub items for %s.', items.length, options.uri)
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await handler(items)
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}
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}
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if (cleaner) await cleaner(startDate)
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}
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export {
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crawlCollectionPage
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}
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