ActivityPubでリモートのオブジェクトをGETするときのリクエストをHTTP Signatureで署名するオプション (#6731)

* Sign ActivityPub GET

* Fix v12, v12.48.0 UI bug

src/remote/activitypub/resolver.ts

@@ -1,8 +1,13 @@
+import config from '../../config';
 import { getJson } from '../../misc/fetch';
+import { ILocalUser } from '../../models/entities/user';
+import { getInstanceActor } from '../../services/instance-actor';
+import { signedGet } from './request';
 import { IObject, isCollectionOrOrderedCollection, ICollection, IOrderedCollection } from './type';
 
 export default class Resolver {
 	private history: Set<string>;
+	private user?: ILocalUser;
 
 	constructor() {
 		this.history = new Set();
@@ -39,7 +44,13 @@ export default class Resolver {
 
 		this.history.add(value);
 
-		const object = await getJson(value, 'application/activity+json, application/ld+json');
+		if (config.signToActivityPubGet && !this.user) {
+			this.user = await getInstanceActor();
+		}
+
+		const object = this.user
+			? await signedGet(value, this.user)
+			: await getJson(value, 'application/activity+json, application/ld+json');
 
 		if (object == null || (
 			Array.isArray(object['@context']) ?