From 4f5f025d5776ce74b78a5a9f5a4cb64d7b7f35b6 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Fri, 16 Jun 2023 11:26:25 -0400
Subject: [PATCH] feat: add webfinger ttl cache

---
 src/activitypub/helpers.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/activitypub/helpers.js b/src/activitypub/helpers.js
index 7c77462839..d001cfb2ed 100644
--- a/src/activitypub/helpers.js
+++ b/src/activitypub/helpers.js
@@ -2,6 +2,10 @@
 
 const request = require('request-promise-native');
 
+const ttl = require('../cache/ttl');
+
+const webfingerCache = ttl({ ttl: 1000 * 60 * 60 * 24 }); // 24 hours
+
 const Helpers = module.exports;
 
 Helpers.query = async (id) => {
@@ -10,6 +14,10 @@ Helpers.query = async (id) => {
 		return false;
 	}
 
+	if (webfingerCache.has(id)) {
+		return webfingerCache.get(id);
+	}
+
 	// Make a webfinger query to retrieve routing information
 	const response = await request(`https://${hostname}/.well-known/webfinger?resource=acct:${id}`, {
 		simple: false,
@@ -28,5 +36,6 @@ Helpers.query = async (id) => {
 		({ href: actorUri } = actorUri);
 	}
 
+	webfingerCache.set(id, { username, hostname, actorUri });
 	return { username, hostname, actorUri };
 };