Question

我希望经过身份验证的设置isAuthenticated：成功联合Google登录后布尔值为True，或者用户已登录状态。

@model MyViewModel
@using (Html.BeginForm())
{
  @Html.DropDownListFor(m => m.HoursToWait, (SelectList)ViewBag.HoursList, "-select-")
}

Answer 1

我写了一篇文章，拿出了点点滴滴并将它们连接在一起。您可能需要创建如下的Auth服务：

import 'rxjs/add/operator/map';
import 'rxjs/add/operator/first';
import { Observable } from 'rxjs/Observable';

import { Injectable } from '@angular/core';
import { CanActivate, Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { AngularFire } from 'angularfire2';

@Injectable()
export class AuthGuard implements CanActivate{
  public allowed: boolean;

  constructor(private af: AngularFire, private router: Router) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    return this.af.auth.map((auth) =>  {
      if(auth == null) {
        this.router.navigate(['/login']);
        return false;
      } else {
        return true;
      }
    }).first()
  }
}

查看AngularFire2 Authentication article了解详情。

Answer 2

只需订阅auth对象，以便在有用户对象时收到通知......

  var auth = this.af.auth.subscribe( (user) => {
    debugger;
    if (user) {
      // User signed in!
      var uid = user.uid;
      console.log(uid)
    } else {
      // User logged out
      console.log("no user")
    }
  });

Answer 3

使用Angular v6，Firebase v5.0.*和angularfire2 5 rc 10，您可以执行以下操作。

...
import { AngularFireAuth } from 'angularfire2/auth';
import { map } from 'rxjs/operators';

...
export class DashboardGuard implements CanActivate, CanActivateChild {

  constructor(private router: Router, private auth: AngularFireAuth) { }
  // #2
  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    // #1
    return this.auth.authState.pipe(
      // #3
      map((user: any) => user !== null) // <--- [1]
    );

  }

  canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    return this.canActivate(route, state);
  }

}

直接使用AngularFireAuth＆＃39; s authState将其删除，并检查用户是否不等于null [1]。

authState返回Observable<firebase.User>
canActivate()返回Observable<boolean> | Promise<boolean> | boolean
订阅authState会发出null，如果未通过身份验证，则会发出firebase.User（请参阅下面的屏幕截图）。

我刚刚发现我现在可以使用最新版本执行此操作 - ＆gt;在Observable<boolean>中返回canActivate ...因为在最后一个版本中虽然在文档中说canActivate返回Observable<boolean>但它给了我很多错误。但是现在好了！

btw我只是想分享我在角度v6之前写道路防护的方法。使用承诺

constructor(private router: Router, private afAuth: AngularFireAuth) {}

canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
  const promise = new Promise(
    (resolve, reject) => {
      this.afAuth.authState.subscribe((state: any) => {
        resolve(state !== null);
      });
    }
  );

  return promise.then((data: boolean) => {
    if (data) {
      return data;
    } else {
      this.router.navigate(['/']);
    }
  });
}

如何将AngularFire2身份验证作为可观察对象？

3 个答案: