Merge pull request from GHSA-qqrm-9grj-6v32

* maybe ok

* fix

* test wip

* :v:

* fix

* if (res.ok)

* validateContentTypeSetAsJsonLD

* 条件を考慮し直す

* その他の+json接尾辞が付いているメディアタイプも受け容れる

* https://github.com/misskey-dev/misskey-ghsa-qqrm-9grj-6v32/pull/1#discussion_r1490999009

* add `; profile="https://www.w3.org/ns/activitystreams"`

* application/ld+json;

1 files changed, 44 insertions, 11 deletions

diff --git a/packages/backend/src/core/HttpRequestService.ts b/packages/backend/src/core/HttpRequestService.ts
index b36b9f6e3c..7f3cac7c58 100644
--- a/packages/backend/src/core/HttpRequestService.ts
+++ b/packages/backend/src/core/HttpRequestService.ts
@@ -14,9 +14,16 @@ import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import { StatusError } from '@/misc/status-error.js';
 import { bindThis } from '@/decorators.js';
+import { validateContentTypeSetAsActivityPub } from '@/core/activitypub/misc/validator.js';
+import type { IObject } from '@/core/activitypub/type.js';
 import type { Response } from 'node-fetch';
 import type { URL } from 'node:url';
 
+export type HttpRequestSendOptions = {
+	throwErrorWhenResponseNotOk: boolean;
+	validators?: ((res: Response) => void)[];
+};
+
 @Injectable()
 export class HttpRequestService {
 	/**
@@ -105,6 +112,23 @@ export class HttpRequestService {
 	}
 
 	@bindThis
+	public async getActivityJson(url: string): Promise<IObject> {
+		const res = await this.send(url, {
+			method: 'GET',
+			headers: {
+				Accept: 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
+			},
+			timeout: 5000,
+			size: 1024 * 256,
+		}, {
+			throwErrorWhenResponseNotOk: true,
+			validators: [validateContentTypeSetAsActivityPub],
+		});
+
+		return await res.json() as IObject;
+	}
+
+	@bindThis
 	public async getJson<T = unknown>(url: string, accept = 'application/json, */*', headers?: Record<string, string>): Promise<T> {
 		const res = await this.send(url, {
 			method: 'GET',
@@ -132,17 +156,20 @@ export class HttpRequestService {
 	}
 
 	@bindThis
-	public async send(url: string, args: {
-		method?: string,
-		body?: string,
-		headers?: Record<string, string>,
-		timeout?: number,
-		size?: number,
-	} = {}, extra: {
-		throwErrorWhenResponseNotOk: boolean;
-	} = {
-		throwErrorWhenResponseNotOk: true,
-	}): Promise<Response> {
+	public async send(
+		url: string,
+		args: {
+			method?: string,
+			body?: string,
+			headers?: Record<string, string>,
+			timeout?: number,
+			size?: number,
+		} = {},
+		extra: HttpRequestSendOptions = {
+			throwErrorWhenResponseNotOk: true,
+			validators: [],
+		},
+	): Promise<Response> {
 		const timeout = args.timeout ?? 5000;
 
 		const controller = new AbortController();
@@ -166,6 +193,12 @@ export class HttpRequestService {
 			throw new StatusError(`${res.status} ${res.statusText}`, res.status, res.statusText);
 		}
 
+		if (res.ok) {
+			for (const validator of (extra.validators ?? [])) {
+				validator(res);
+			}
+		}
+
 		return res;
 	}
 }