没有 'new' 就无法调用 AngularFire Auth Persistence

Question

我正在尝试使用以下代码在 angularfire 中实现持久性身份验证：

constructor(private auth: Auth, private router: Router) {
    if (auth.currentUser) this.router.navigate(this.redirect);
  }

  async loginWithGoogle() {
    const provider = new GoogleAuthProvider();

    try {
      await setPersistence(this.auth, browserLocalPersistence);
      await signInWithPopup(this.auth, provider);
      this.message = 'Sign in successful';
      await this.router.navigate(this.redirect);
    } catch (error: any) {
      console.error(error);
      if (error.code) {
        this.message = `${error.code}: ${error.message}`;
      } else {
        this.message = 'There was a problem signing in. Please try again.';
      }
    }
  }

但是，无论 setPersistence 方法的位置如何，我总是会遇到此错误：

Class constructor BrowserLocalPersistence cannot be invoked without 'new'

我跟着文档 (https://firebase.google.com/docs/auth/web/auth-state-persistence) 来到了 T；我做错了什么？

我正在使用 Angular 13、Angularfire 7 和 Firebase 9。

Answer 1

来自 persisting auth state persistence in the JavaScript/web SDK 上的文档：

For a web application, the default behavior is to persist a user's session even after the user closes the browser.

我强烈建议仅在您知道自己有需要它的特定用例时才调用 setPersistence。在大多数浏览器上，Firebase 已经在重新加载之间保持身份验证状态，而无需调用 setPersistence.

Answer 2

我在下面留下了我的提供者登录实现。

虽然我还没有迁移到这个项目中的 Modular Firebase V9，但是身份验证持久性仍然有效 - 登录过一次的用户不需要每次回来都重新登录。

我发现在可以注入组件或模块的服务中保留身份验证逻辑是一种很好的做法。

在构造函数中，您可以找到一种很好的方法来确定您的用户是否已登录并在 Cloud Firestore 中拥有与其身份验证 ID 关联的配置文件。


export class AuthService {

  analytics = firebase.analytics(); // this declaration works better than constructor init from import
  userCredential; // to store the promise returned when signing up/ in with email & password
  // type: User from the model
  user$: Observable<User>; // defined as observable as it can change when user signs in/out

  constructor(
    // inject imports for fire store auth service in constructor
    private afAuth: AngularFireAuth,
    private afs: AngularFirestore,
    private router: Router
  ) {

    // Get the auth state, then fetch the Firestore user document or return null
    this.user$ = this.afAuth.authState.pipe(  // define the observable state
      switchMap(user => {
        // Logged in
        if (user) { // if user is defined
          // point to document with matching ID
          return this.afs.doc<User>(`users/${user.uid}`).valueChanges();
        } else {
          // Logged out
          return of(null); // allows us to tell when user is not logged in
        }
      })
    );
  }

  /**
   * Authenticate users with Google O-Auth provider
   * @param {boolean=} [registration = false] - whether this is the first sign in or not
   */
  async googleSignIn(registration: boolean = false) {

    // reference google auth provider
    const provider = new auth.GoogleAuthProvider();
    // pass provider to sign in with popup functionality
    this.userCredential = await this.afAuth.signInWithPopup(provider);

    if (registration) { // if the request is coming from the registration page

      try {
        await this.insertNewUser(this.userCredential.user, this.userCredential.user.displayName);
        await this.verifyEmail(); // send a verification email to the user when registering
        await this.router.navigate(['/user-profile']);
      } catch (err) {
        console.log(`Error: ${err.errorMessage}`);
        M.toast({html: `Error: ${err.errorMessage}`, classes: 'rounded materialize-red'});
      }

    } else {  //  user is logging in again

      try {
        await this.router.navigate(['/user-profile']);
        M.toast({html: `Signed in as ${this.userCredential.user.displayName}`, classes: 'rounded blue'});

        // let user know that they haven't been verified
        if (!this.userCredential.emailVerified) {
          console.log(`user's email has not been verified`);
          M.toast({
            html: `Your email has not yet been verified. Please check your inbox.`,
            classes: 'rounded orange darken-2'
          });
        }

      } catch (err) {
        console.log(`Error: ${err.errorMessage}`);
        M.toast({html: `Error: ${err.errorMessage}`, classes: 'rounded materialize-red'});
      }

    }

    // track the login event with analytics
    this.analytics.logEvent('login', {serviceName: 'Google Login'});

  } // end of sign in function

} // end of auth service

没有 'new' 就无法调用 AngularFire Auth Persistence

AngularFire Auth Persistence cannot be invoked without 'new'

angular

firebase

firebase-authentication

angularfire2

rxfire