Public user autologin #6593 | Support Center | ABP Commercial

vd created 3 months ago

ABP Framework version: v7.4.4
UI Type: Angular
Database System: EF Core (SQL Server)
Auth Server Separated (for Angular): no

I'm trying to implement public user automatic authentication (for permission management). When users access the website, I want them to be automatically connected under a single "public" user.

I tried this in app.component :

ngOnInit(): void {
        
        //...
        
        const currentUser = this.config.getOne("currentUser");

        if(currentUser == null || currentUser.id == null){
            const loginParams: LoginParams = {
                username: 'public',
                password: '**********'
            }
            this.authService.login(loginParams).subscribe(
                () => {
                    window.location.reload();
                }
            );
        }
    }

window.location.reload() is currently necessary to refresh the top right menu. If I don't reload the page, upon clicking on the user menu I get an error :

app.component.ts:38 ERROR TypeError: Cannot read properties of undefined (reading 'toggle')
    at ToolbarContainerComponent.toggleCtxMenu (volosoft-ngx-lepton-x-layouts.mjs:373:22)
    at ToolbarContainerComponent_Template_lpx_toolbar_profileClick_0_listener (volosoft-ngx-lepton-x-layouts.mjs:377:362)
    at executeListenerWithErrorHandling (core.mjs:16195:16)
    at Object.wrapListenerIn_markDirtyAndPreventDefault [as next] (core.mjs:16228:22)
    at ConsumerObserver.next (Subscriber.js:91:33)
    at SafeSubscriber._next (Subscriber.js:60:26)
    at SafeSubscriber.next (Subscriber.js:31:18)
    at Subject.js:34:30
    at errorContext (errorContext.js:19:9)
    at EventEmitter_.next (Subject.js:27:21)

How can I avoid reloading the page ?

I also tried moving the authentication code to an APP_INITIALIZER in app.module, but then, the authService is not yet initialized

11 Answer(s)

0

Anjali_Musmade created 2 months ago
Support Team Support Team Member

Hi

Have you tried overriding Login.cshtml in backend you can write your custom logic there.

https://docs.abp.io/pt-BR/abp/2.8/How-To/Customize-Login-Page-MVC
0

vd created 2 months ago

Hi,

I'm using Angular with Resource Owner Password Flow so I don't think changing Login.cshtml will help me.

Besides, the public login should occur automatically when opening any page of the application. Not only the login page.

sinan created 2 months ago

Support Team Angular Developer

hi as a workaround, can you do something like this? With this method, you won't need to reload the page.

export class AppComponent {
  config = inject(ConfigStateService);
  authService = inject(AuthService);
  router = inject(Router);

  constructor() {
    const currentUser = this.config.getOne('currentUser');

    if (currentUser == null || currentUser.id == null) {
      const loginParams: LoginParams = {
        username: 'admin', // change with your username
        password: '1q2w3E*', // change with your password
        redirectUrl: '/',
      };
      this.router.navigateByUrl('/account/login').then(() => {
        this.authService
          .login(loginParams)
          .subscribe();
      });
    }
  }
}

vd created 2 months ago

hi as a workaround, can you do something like this? With this method, you won't need to reload the page.

export class AppComponent { 
  config = inject(ConfigStateService); 
  authService = inject(AuthService); 
  router = inject(Router); 
 
  constructor() { 
    const currentUser = this.config.getOne('currentUser'); 
 
    if (currentUser == null || currentUser.id == null) { 
      const loginParams: LoginParams = { 
        username: 'admin', // change with your username 
        password: '1q2w3E*', // change with your password 
        redirectUrl: '/', 
      }; 
      this.router.navigateByUrl('/account/login').then(() => { 
        this.authService 
          .login(loginParams) 
          .subscribe(); 
      }); 
    } 
  } 
}

Thanks but with your workaround, the login page is displayed for 1-2 seconds before being redirected to the main page. Seeing the login page for a few seconds before it disappears is confusing for the user.

0

Anjali_Musmade created 2 months ago
Support Team Support Team Member

Hi,

could you please check this if it helps you https://support.abp.io/QA/Questions/4484/Allow-Guest-user-to-use-certain-application-services-served-by-a-guest-page#answer-562eec34-7eec-073f-0829-3a092fd6770f
0

vd created 2 months ago

Hi,

could you please check this if it helps you
https://support.abp.io/QA/Questions/4484/Allow-Guest-user-to-use-certain-application-services-served-by-a-guest-page#answer-562eec34-7eec-073f-0829-3a092fd6770f

Right now, I'm trying to avoid refreshing the page in Angular. This link is not about Angular.

For instance, when changing the language in any abp project, the texts are replaced without the page needing to refresh. How is it done ?
0

Anjali_Musmade created 2 months ago
Support Team Support Team Member

Hello,

could you please check https://community.abp.io/posts/implementing-passwordless-authentication-with-asp.net-core-identity-c25l8koj

Thanks
0

vd created 2 months ago

The link you provided is for implementing passwordless authentication with MVC when I'm trying to figure out how to refresh the page without reloading (after autologin) in Angular.

Anjali_Musmade created 2 months ago

Support Team Support Team Member

Hello,

I apologies for your inconvenience, yes that link is for MVC. Angular uses oAuth2 as an authentication method.

To refresh the page without reloading (after autologin) in Angular try to add below code in app.comonent.ts

export class AppComponent {
  constructor(private authService:AuthService, private router:Router)   { }
   
   ngOnInit(): void {
    
    if (this.authService.isAuthenticated) {
      this.router.navigate(this.router.getCurrentNavigation().extras.state?.redirect || ['/']);
    }
    else {
      this.router.navigate(['/']);
    }
 }
}

Thanks

vd created 2 months ago

I was still getting the error so I tried another approach : replace the ToolbarComponent with my own, like explained here. In my custom toolbar, I can now check if the user is public or not and show the corresponding menu accordingly.

However, I get another console error :

ERROR Error: NG0100: ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'null'. Current value: 'undefined'. Expression location: MyToolbarContainerComponent component. Find more at https://angular.io/errors/NG0100
    at throwErrorIfNoChangesMode (core.mjs:11010:11)
    at bindingUpdated (core.mjs:14251:17)
    at bindingUpdated2 (core.mjs:14266:12)
    at pureFunction2Internal (core.mjs:22917:12)
    at Module.ɵɵpureFunction2 (core.mjs:22711:12)
--->    at MyToolbarContainerComponent_Template (toolbar-container.component.html:3:10)
    at ReactiveLViewConsumer.runInContext (core.mjs:11103:13)
    at executeTemplate (core.mjs:11404:22)
    at refreshView (core.mjs:12898:13)
    at detectChangesInView (core.mjs:13062:9)

The problem seems to be here :

     <lpx-toolbar [profileRef]="profileRef$" (profileClick)="toggleCtxMenu()">
    <ng-container
--->    ngIf="{
            user: userProfileService.user$ | async,
            profileRef: profileRef$ | async
        } as data"
    >
        <lpx-context-menu *ngIf="data.profileRef" #menu="lpx-context-menu" (lpxClickOutside)="menu.close()" [exceptedRefs]="[data.profileRef]">
            <lpx-context-menu-header>
                <div class="lpx-user-ctx-header">
                    <div class="lpx-user-ctx-img">
                        <lpx-avatar [avatar]="data.user?.avatar"></lpx-avatar>
                    </div>
                    <div class="lpx-user-ctx-info">
                        <span class="lpx-context-menu-user-name">
                            {{ data.user?.fullName || data.user?.userName }}
                        </span>
                        <span *ngIf="data.user?.tenant?.name as tenantName" class="lpx-context-menu-user-tenant">
                            {{ tenantName }}
                        </span>
                        <span class="lpx-context-menu-user-email">{{ data.user?.email }}</span>
                    </div>
                </div>
            </lpx-context-menu-header>
            <ng-container *ngFor="let actions of data.user?.userActionGroups">
                <lpx-context-menu-action-group>
                    <lpx-navbar-routes [navbarItems]="actions" [routerItem]="false"></lpx-navbar-routes>
                </lpx-context-menu-action-group>
            </ng-container>
        </lpx-context-menu>
    </ng-container>
</lpx-toolbar>

I downloaded lepton-x source code for comparison but there seems to be no difference between my html and yours.

0

Anjali_Musmade created 2 months ago
Support Team Support Team Member

Hello,

Please check this discussion https://stackoverflow.com/questions/45467881/expressionchangedafterithasbeencheckederror-expression-has-changed-after-it-was

thanks

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