AngularFire 2 authState 在页面刷新时返回 null答案

【问题标题】：AngularFire 2 authState returning null on Page RefreshAngularFire 2 authState 在页面刷新时返回 null
【发布时间】：2019-03-31 09:29:27
【问题描述】：

我正在使用带有 AngularFire 2 的 firebase。

我的问题是，当我尝试刷新页面时，auth 实例返回 null。

这是我的身份验证服务的代码。

一切正常，但每当我刷新页面时，身份验证为空，我无法调用 firebase 数据库，因为我的规则要求用户进行身份验证。

export class AuthService {
private userDetails: Users = null;
private dbUsers;
public loginStatus = new BehaviorSubject(false);

public GOOGLE_OATH_SCOPES = 'email, https://www.googleapis.com/auth/drive';

constructor(
    private _firebaseAuth: AngularFireAuth,
    private router: Router,
    private firebase: AngularFireDatabase,
    private _userService: UserService
) {
    var currentUser = JSON.parse(localStorage.getItem('currentUser'));
    this.setUserFromLocalstorage(currentUser);
    _firebaseAuth.authState.subscribe(
        (user) => {
             console.log("Step 1",user);
            if (user) {

            }
            else {
                this.setUserFromLocalstorage(currentUser);
            }
        }
    );

}
setUserFromLocalstorage(currentUser) {
    if (currentUser && !_.isEmpty(currentUser)) {
        this.userDetails = currentUser;
    } else {
        this.userDetails = null;
    };
}
signInWithGoogle() {
    var provider = new firebase.auth.GoogleAuthProvider();
    provider.setCustomParameters({
        prompt: 'select_account'
    });
    provider.addScope(this.GOOGLE_OATH_SCOPES);
    this._firebaseAuth.auth.setPersistence(firebase.auth.Auth.Persistence.NONE).then(() =>
        this._firebaseAuth.auth.signInWithPopup(
            provider
        ).then((result) => {
            localStorage.setItem('accessToken', result.credential.accessToken);
        })
    )
}

isLoggedIn() {
    if (!this.loginStatus.value) {
        return false;
    } else {
        return true;
    }
}


logout() {
    this._firebaseAuth.auth.signOut()
        .then((res) => {
            this.router.navigate(['/'])
            localStorage.clear()
            this.userDetails = null;
            this.loginStatus.next(false);
        }
        );

}


getLoggedInUser() {
    return _.cloneDeep(this.userDetails);
}

setLoggedInUser(user: Users) {
    this.userDetails = user;
    localStorage.setItem("currentUser", JSON.stringify(user));
}

}

还有 AngularFireAuth：

export declare class AngularFireAuth {
    private zone;
    readonly auth: FirebaseAuth;
    readonly authState: Observable<User | null>;
    readonly idToken: Observable<string | null>;
    constructor(config: FirebaseOptions, name: string, platformId: Object, zone: NgZone);
}

我的登录方法：

this._firebaseAuth.auth.setPersistence(firebase.auth.Auth.Persistence.None).then(() =>
                this._firebaseAuth.auth.signInWithPopup(
                    provider
                ).then((result) => {

                })
    )

我该如何解决这个问题？

【问题讨论】：

标签： typescript firebase angularfire2

【解决方案1】：

问题在于您的登录方法。

this._firebaseAuth.auth.setPersistence(firebase.auth.Auth.Persistence.None).then(() =>
            this._firebaseAuth.auth.signInWithPopup(
                provider
            ).then((result) => {

            })
)

setPersistence(firebase.auth.Auth.Persistence.None) 行声明状态只会存储在内存中，并且会在窗口或活动刷新时被清除。

尝试使用firebase.auth.Auth.Persistence.Session 或firebase.auth.Auth.Persistence.Local

根据您的要求。

参考：https://firebase.google.com/docs/auth/web/auth-state-persistence

【讨论】：