wildebeest/functions/.well-known/webfinger.ts

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1.6 KiB
TypeScript

// https://www.rfc-editor.org/rfc/rfc7033
import { parseHandle } from '../../backend/src/utils/parse'
import { getActorById, actorURL } from 'wildebeest/backend/src/activitypub/actors'
import type { Env } from '../../backend/src/types/env'
import type { WebFingerResponse } from '../../backend/src/webfinger'
import { type Database, getDatabase } from 'wildebeest/backend/src/database'
export const onRequest: PagesFunction<Env, any> = async ({ request, env }) => {
return handleRequest(request, await getDatabase(env))
}
const headers = {
'content-type': 'application/jrd+json',
'cache-control': 'max-age=3600, public',
}
export async function handleRequest(request: Request, db: Database): Promise<Response> {
const url = new URL(request.url)
const domain = url.hostname
const resource = url.searchParams.get('resource')
if (!resource) {
return new Response('', { status: 400 })
}
const parts = resource.split(':')
if (parts.length !== 2 || parts[0] !== 'acct') {
return new Response('', { status: 400 })
}
const handle = parseHandle(parts[1])
if (handle.domain === null) {
return new Response('', { status: 400 })
}
if (handle.domain !== domain) {
return new Response('', { status: 403 })
}
const actor = await getActorById(db, actorURL(domain, handle.localPart))
if (actor === null) {
return new Response('', { status: 404 })
}
const jsonLink = actor.id.toString()
const res: WebFingerResponse = {
subject: `acct:${handle.localPart}@${handle.domain}`,
aliases: [jsonLink],
links: [
{
rel: 'self',
type: 'application/activity+json',
href: jsonLink,
},
],
}
return new Response(JSON.stringify(res), { headers })
}