JWT - canActivate：[AuthGuard]不允许登录

Question

我正在创建一个示例MEAN身份验证应用程序，其中我有一个主页，注册页面，登录页面，仪表板和配置文件页面。我试图在angular2-jwt的帮助下应用身份验证。但这对我不起作用。我被困在登录页面。当我输入用户名密码（正确）时，会出现“您已登录”的闪存消息，但不会将我重定向到仪表板页面（在认证部分之前工作）。当我手动输入仪表板页面的URL（现在应该可以在我登录时访问）时，它仍然会将我重定向到登录页面。

另一个问题是我编写了登录和注册按钮的代码，一旦用户登录就会消失，但是在“你登录”的flash消息后它们也没有消失。

任何形式的帮助都将受到高度赞赏。

这是我的navbar.component.html

<nav class="navbar navbar-default">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"
        aria-controls="navbar">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
      <a class="navbar-brand" href="#">MEAN Auth App</a>
    </div>
    <div id="navbar" class="collapse navbar-collapse">
      <ul class="nav navbar-nav navbar-left">
        <li [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}"><a [routerLink]="['/']">Home</a></li>
      </ul>

      <ul class="nav navbar-nav navbar-right">
        <li *ngIf="authService.loggedIn()" [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}"><a [routerLink]="['/dashboard']">Dashboard</a></li>
        <li *ngIf="authService.loggedIn()" [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}"><a [routerLink]="['/profile']">Profile</a></li>

        <li *ngIf="!authService.loggedIn()" [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}"><a [routerLink]="['/login']">Login</a></li>
        <li *ngIf="!authService.loggedIn()" [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}"><a [routerLink]="['/register']">Register</a></li>
        <li *ngIf="authService.loggedIn()"><a (click)="onLogoutClick()" href="#">Logout</a></li>
      </ul>
    </div>
    <!--/.nav-collapse -->
  </div>
</nav>

我的navbar.component.ts

import { Component, OnInit } from '@angular/core';
import {AuthService} from '../../services/auth.service';
import {Router} from '@angular/router';
import {FlashMessagesService} from 'angular2-flash-messages';

@Component({
  selector: 'app-navbar',
  templateUrl: './navbar.component.html',
  styleUrls: ['./navbar.component.css']
})
export class NavbarComponent implements OnInit {

  constructor(
    private authService:AuthService,
    private router:Router,
    private flashMessage:FlashMessagesService) { }

  ngOnInit() {
  }

  onLogoutClick(){
    this.authService.logout();
    this.flashMessage.show('You are logged out', {
      cssClass:'alert-success',
      timeout: 3000
    });
    this.router.navigate(['/login']);
    return false;
  }
}

我的app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import {RouterModule, Routes} from '@angular/router';

import { AppComponent } from './app.component';
import { NavbarComponent } from './components/navbar/navbar.component';
import { LoginComponent } from './components/login/login.component';
import { RegisterComponent } from './components/register/register.component';
import { HomeComponent } from './components/home/home.component';
import { DashboardComponent } from './components/dashboard/dashboard.component';
import { ProfileComponent } from './components/profile/profile.component';

import {ValidateService} from './services/validate.service';
import {AuthService} from './services/auth.service';
import {FlashMessagesModule} from 'angular2-flash-messages';
import {AuthGuard} from './guards/auth.guard';

const appRoutes: Routes =  [
  {path:'', component: HomeComponent},
  {path:'register', component: RegisterComponent},
  {path:'login', component: LoginComponent},
  {path:'dashboard', component: DashboardComponent, canActivate:[AuthGuard]},
  {path:'profile', component: ProfileComponent, canActivate:[AuthGuard]}
]

@NgModule({
  declarations: [
    AppComponent,
    NavbarComponent,
    LoginComponent,
    RegisterComponent,
    HomeComponent,
    DashboardComponent,
    ProfileComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    RouterModule.forRoot(appRoutes),
    FlashMessagesModule
  ],
  providers: [ValidateService, AuthService, AuthGuard],
  bootstrap: [AppComponent]
})
export class AppModule { }

我的auth.gaurd.ts

import {Injectable} from '@angular/core';
import {Router, CanActivate} from '@angular/router';
import {AuthService} from '../services/auth.service';

@Injectable()
export class AuthGuard implements CanActivate{
  constructor(private authService:AuthService, private router:Router){

  }

  canActivate(){
    if(this.authService.loggedIn()){
      return true;
    } else {
      this.router.navigate(['/login']);
      return false;
    }
  }
}

我的auth.service.ts

import { Injectable } from '@angular/core';
import {Http, Headers} from '@angular/http';
import 'rxjs/add/operator/map';
import {tokenNotExpired} from 'angular2-jwt';

@Injectable()
export class AuthService {
  authToken: any;
  user: any;
  isDev:boolean;

  constructor(private http:Http) {
    this.isDev = false; // Change to false before deployment
  }

  registerUser(user){
    let headers = new Headers();
    headers.append('Content-Type','application/json');
    let ep = this.prepEndpoint('users/register');
    return this.http.post(ep, user,{headers: headers})
      .map(res => res.json());
  }

  authenticateUser(user){
    let headers = new Headers();
    headers.append('Content-Type','application/json');
    let ep = this.prepEndpoint('users/authenticate');
    return this.http.post(ep, user,{headers: headers})
      .map(res => res.json());
  }

  getProfile(){
    let headers = new Headers();
    this.loadToken();
    headers.append('Authorization', this.authToken);
    headers.append('Content-Type','application/json');
    let ep = this.prepEndpoint('users/profile');
    return this.http.get(ep,{headers: headers})
      .map(res => res.json());
  }

  storeUserData(token, user){
    localStorage.setItem('id_token', token);
    localStorage.setItem('user', JSON.stringify(user));
    this.authToken = token;
    this.user = user;
  }

  loadToken(){
    const token = localStorage.getItem('id_token');
    this.authToken = token;
  }

  loggedIn(){
    return tokenNotExpired();
  }

  logout(){
    this.authToken = null;
    this.user = null;
    localStorage.clear();
  }

  prepEndpoint(ep){
    if(this.isDev){
      return ep;
    } else {
      return 'http://localhost:8080/'+ep;
    }
  }
}

和我的login.component.ts

import { Component, OnInit } from '@angular/core';
import {AuthService} from '../../services/auth.service';
import {Router} from '@angular/router';
import {FlashMessagesService} from 'angular2-flash-messages';

@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {
  username: String;
  password: String;

  constructor(
    private authService:AuthService,
    private router:Router,
    private flashMessage:FlashMessagesService
  ) { }

  ngOnInit() {
  }

  onLoginSubmit(){
    const user = {
      username: this.username,
      password: this.password
    }

    this.authService.authenticateUser(user).subscribe(data => {
      if(data.success){
        this.authService.storeUserData(data.token, data.user);
        this.flashMessage.show('You are now logged in', {
          cssClass: 'alert-success',
          timeout: 5000});
        this.router.navigate(['dashboard']);
        console.log("I have navigated");
      } else {
        this.flashMessage.show(data.msg, {
          cssClass: 'alert-danger',
          timeout: 5000});
        this.router.navigate(['login']);
      }
    });
  }
}

如果我需要上传任何其他文件，请告诉我。并且“我已导航”正在控制台中打印，这是用login.comonent.ts编写的（我写的只是为了检查）。