fix sanitize Actor summary instead of content & testing

backend/src/activitypub/actors/index.ts

@@ -43,32 +43,32 @@ export async function get(url: string | URL): Promise<Actor> {
 
 	const data = await res.json<any>()
 	const actor: Actor = { ...data }
-	actor.id = new URL(data.id)
+	actor.id = new URL(actor.id)
 
-	if (data.content) {
-		actor.content = await sanitizeContent(data.content)
+	if (actor.summary) {
+		actor.summary = await sanitizeContent(actor.summary)
 	}
-	if (data.name) {
-		actor.name = await getTextContent(data.name)
+	if (actor.name) {
+		actor.name = await getTextContent(actor.name)
 	}
-	if (data.preferredUsername) {
-		actor.preferredUsername = await getTextContent(data.preferredUsername)
+	if (actor.preferredUsername) {
+		actor.preferredUsername = await getTextContent(actor.preferredUsername)
 	}
 
 	// This is mostly for testing where for convenience not all values
 	// are provided.
 	// TODO: eventually clean that to better match production.
-	if (data.inbox !== undefined) {
-		actor.inbox = new URL(data.inbox)
+	if (actor.inbox !== undefined) {
+		actor.inbox = new URL(actor.inbox)
 	}
-	if (data.following !== undefined) {
-		actor.following = new URL(data.following)
+	if (actor.following !== undefined) {
+		actor.following = new URL(actor.following)
 	}
-	if (data.followers !== undefined) {
-		actor.followers = new URL(data.followers)
+	if (actor.followers !== undefined) {
+		actor.followers = new URL(actor.followers)
 	}
-	if (data.outbox !== undefined) {
-		actor.outbox = new URL(data.outbox)
+	if (actor.outbox !== undefined) {
+		actor.outbox = new URL(actor.outbox)
 	}
 
 	return actor

backend/test/activitypub.spec.ts

@@ -22,6 +22,7 @@ const vapidKeys = {} as JWK
 const domain = 'cloudflare.com'
 
 describe('ActivityPub', () => {
+	describe('Actors', () => {
 		test('fetch non-existant user by id', async () => {
 			const db = await makeDB()
 
@@ -61,6 +62,29 @@ describe('ActivityPub', () => {
 			assert.equal(data.publicKey.publicKeyPem, pubKey)
 		})
 
+		test('sanitize Actor properties', async () => {
+			globalThis.fetch = async (input: RequestInfo) => {
+				if (input === 'https://example.com/actor') {
+					return new Response(
+						JSON.stringify({
+							id: 'https://example.com/actor',
+							type: 'Person',
+							summary: "it's me, Mario. <script>alert(1)</script>",
+							name: 'hi<br />hey',
+							preferredUsername: 'sven <script>alert(1)</script>',
+						})
+					)
+				}
+				throw new Error(`unexpected request to "${input}"`)
+			}
+
+			const actor = await actors.get('https://example.com/actor')
+			assert.equal(actor.summary, "it's me, Mario. <p>alert(1)</p>")
+			assert.equal(actor.name, 'hi hey')
+			assert.equal(actor.preferredUsername, 'sven alert(1)')
+		})
+	})
+
 	describe('Outbox', () => {
 		test('return outbox', async () => {
 			const db = await makeDB()