59 lines
1.8 KiB
TypeScript
59 lines
1.8 KiB
TypeScript
import { eachSeries } from 'async'
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import { NextFunction, Request, RequestHandler, Response } from 'express'
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import { ActivityPubSignature } from '../../shared'
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import { isSignatureVerified, logger } from '../helpers'
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import { ACCEPT_HEADERS, ACTIVITY_PUB } from '../initializers'
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import { getOrCreateActorAndServerAndModel } from '../lib/activitypub'
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import { ActorModel } from '../models/activitypub/actor'
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async function checkSignature (req: Request, res: Response, next: NextFunction) {
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const signatureObject: ActivityPubSignature = req.body.signature
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const [ creator ] = signatureObject.creator.split('#')
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logger.debug('Checking signature of actor %s...', creator)
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let actor: ActorModel
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try {
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actor = await getOrCreateActorAndServerAndModel(creator)
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} catch (err) {
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logger.error('Cannot create remote actor and check signature.', err)
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return res.sendStatus(403)
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}
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const verified = await isSignatureVerified(actor, req.body)
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if (verified === false) return res.sendStatus(403)
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res.locals.signature = {
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actor
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}
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return next()
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}
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function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
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return (req: Request, res: Response, next: NextFunction) => {
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const accepted = req.accepts(ACCEPT_HEADERS)
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console.log(accepted)
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if (accepted === false || ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS.indexOf(accepted) === -1) {
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return next()
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}
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logger.debug('ActivityPub request for %s.', req.url)
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if (Array.isArray(fun) === true) {
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return eachSeries(fun as RequestHandler[], (f, cb) => {
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f(req, res, cb)
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}, next)
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}
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return (fun as RequestHandler)(req, res, next)
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}
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}
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// ---------------------------------------------------------------------------
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export {
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checkSignature,
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executeIfActivityPub
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}
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