Ocelot-Social/backend/src/activitypub/routes/webFinger.js

import express from 'express'
import { createWebFinger } from '../utils/actor'
import gql from 'graphql-tag'

const router = express.Router()

router.get('/', async function (req, res) {
  const resource = req.query.resource
  if (!resource || !resource.includes('acct:')) {
    return res.status(400).send('Bad request. Please make sure "acct:USER@DOMAIN" is what you are sending as the "resource" query parameter.')
  } else {
    const nameAndDomain = resource.replace('acct:', '')
    const name = nameAndDomain.split('@')[0]

    let result
    try {
      result = await req.app.get('ap').dataSource.client.query({
        query: gql`
        query {
          User(slug: "${name}") {
            slug
          }
        }
      `
      })
    } catch (error) {
      return res.status(500).json({ error })
    }

    if (result.data && result.data.User.length > 0) {
      const webFinger = createWebFinger(name)
      return res.contentType('application/jrd+json').json(webFinger)
    } else {
      return res.status(404).json({ error: `No record found for ${nameAndDomain}.` })
    }
  }
})

export default router