1 files changed, 44 insertions, 0 deletions

diff --git a/server/helpers/webfinger.ts b/server/helpers/webfinger.ts
new file mode 100644
index 000000000..9586fa562
--- /dev/null
+++ b/server/helpers/webfinger.ts
@@ -0,0 +1,44 @@
+import * as WebFinger from 'webfinger.js'
+
+import { isTestInstance } from './core-utils'
+import { isActivityPubUrlValid } from './custom-validators'
+import { WebFingerData } from '../../shared'
+import { fetchRemoteAccountAndCreatePod } from './activitypub'
+
+const webfinger = new WebFinger({
+  webfist_fallback: false,
+  tls_only: isTestInstance(),
+  uri_fallback: false,
+  request_timeout: 3000
+})
+
+async function getAccountFromWebfinger (url: string) {
+  const webfingerData: WebFingerData = await webfingerLookup(url)
+
+  if (Array.isArray(webfingerData.links) === false) return undefined
+
+  const selfLink = webfingerData.links.find(l => l.rel === 'self')
+  if (selfLink === undefined || isActivityPubUrlValid(selfLink.href) === false) return undefined
+
+  const { account } = await fetchRemoteAccountAndCreatePod(selfLink.href)
+
+  return account
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  getAccountFromWebfinger
+}
+
+// ---------------------------------------------------------------------------
+
+function webfingerLookup (url: string) {
+  return new Promise<WebFingerData>((res, rej) => {
+    webfinger.lookup('nick@silverbucket.net', (err, p) => {
+      if (err) return rej(err)
+
+      return p
+    })
+  })
+}