我正在尝试使用Angularfire2(v5.0.0-rc.3),但我收到了CORS问题

由于访问权限,XMLHttpRequest无法加载https://firestore.googleapis.com/google.firestore.v1beta1.Firestore/Listen/channel?gsessionid=w5AH2plIbmZY17fjCAsl4-KEpD1GjKtr&VER=8&RID=rpc&SID=bFGKCCIqerIWjB6AlU9X0Q&CI=0&AID=4&TYPE=xmlhttp&zx=ul0vajwsa7m2&t=2控制检查 .

这是我的服务,它会触发此错误

import { AngularFirestore, AngularFirestoreCollection } from 'angularfire2/firestore';

@Injectable()
export class ClientsService {
  private clientsCollection: AngularFirestoreCollection<Client>;
  clients: Observable<Client[]>;

  constructor(private afs: AngularFirestore) {
    this.clientsCollection = afs.collection<Client>('clients');
    this.clients = this.clientsCollection.valueChanges();
  }

  updateClients = (params: any): Promise<Client[]> => {
    this.clientsCollection = this.afs.collection('clients')
    this.clients = this.clientsCollection.valueChanges()
    return this.clients.toPromise()
  }
}

有人有什么建议吗?