fix(backend): request.body may be undefined (#9356)

packages/backend/src/server/api/ApiCallService.ts

@@ -54,21 +54,21 @@ export class ApiCallService implements OnApplicationShutdown {
 	@bindThis
 	public handleRequest(
 		endpoint: IEndpoint & { exec: any },
-		request: FastifyRequest<{ Body: Record<string, unknown>, Querystring: Record<string, unknown> }>,
+		request: FastifyRequest<{ Body: Record<string, unknown> | undefined, Querystring: Record<string, unknown> }>,
 		reply: FastifyReply,
 	) {
 		const body = request.method === 'GET'
 			? request.query
 			: request.body;
 
-		const token = body['i'];
+		const token = body?.['i'];
 		if (token != null && typeof token !== 'string') {
 			reply.code(400);
 			return;
 		}
 		this.authenticateService.authenticate(token).then(([user, app]) => {
 			this.call(endpoint, user, app, body, null, request).then((res) => {
-				if (request.method === 'GET' && endpoint.meta.cacheSec && !body['i'] && !user) {
+				if (request.method === 'GET' && endpoint.meta.cacheSec && !body?.['i'] && !user) {
 					reply.header('Cache-Control', `public, max-age=${endpoint.meta.cacheSec}`);
 				}
 				this.send(reply, res);
@@ -111,7 +111,7 @@ export class ApiCallService implements OnApplicationShutdown {
 		for (const [k, v] of Object.entries(multipartData.fields)) {
 			fields[k] = v.value;
 		}
-	
+
 		const token = fields['i'];
 		if (token != null && typeof token !== 'string') {
 			reply.code(400);
@@ -199,7 +199,7 @@ export class ApiCallService implements OnApplicationShutdown {
 			name: string;
 			path: string;
 		} | null,
-		request: FastifyRequest<{ Body: Record<string, unknown>, Querystring: Record<string, unknown> }>,
+		request: FastifyRequest<{ Body: Record<string, unknown> | undefined, Querystring: Record<string, unknown> }>,
 	) {
 		const isSecure = user != null && token == null;
 		const isModerator = user != null && (user.isModerator || user.isAdmin);