63 lines
1.9 KiB
TypeScript
63 lines
1.9 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 { database as db } from '../initializers'
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import { ACCEPT_HEADERS, ACTIVITY_PUB } from '../initializers/constants'
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import { fetchRemoteAccount, saveAccountAndServerIfNotExist } from '../lib/activitypub/account'
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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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logger.debug('Checking signature of account %s...', signatureObject.creator)
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let account = await db.Account.loadByUrl(signatureObject.creator)
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// We don't have this account in our database, fetch it on remote
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if (!account) {
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account = await fetchRemoteAccount(signatureObject.creator)
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if (!account) {
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return res.sendStatus(403)
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}
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// Save our new account and its server in database
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await saveAccountAndServerIfNotExist(account)
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}
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const verified = await isSignatureVerified(account, req.body)
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if (verified === false) return res.sendStatus(403)
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res.locals.signature = {
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account
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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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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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