javascript - Creating a session timeout function, which can display timer and redirect to previous page on timeout in angular

Javascript - Creating a session timeout function, which can display timer and redirect to previous page on timeout in angular

To create a session timeout function in Angular, you can use a combination of setTimeout to track the idle time and Angular's Router to navigate to the previous page upon timeout. Here's an example of how you might implement this:

  1. SessionTimeoutService: Create a service to manage the session timeout. This service will handle the countdown, redirecting, and resetting the timer.
// session-timeout.service.ts import { Injectable } from '@angular/core'; import { Router } from '@angular/router'; @Injectable({ providedIn: 'root', }) export class SessionTimeoutService { private readonly idleTimeoutMilliseconds = 300000; // 5 minutes in milliseconds private countdownTimer: any; constructor(private router: Router) {} startCountdown(): void { this.countdownTimer = setTimeout(() => { this.logout(); // Redirect to the previous page or a logout page }, this.idleTimeoutMilliseconds); } resetCountdown(): void { clearTimeout(this.countdownTimer); this.startCountdown(); } private logout(): void { // Add any additional cleanup code before redirecting this.router.navigate(['/login']); // Redirect to the login page or another page of your choice } }
  1. AppComponent: Use the SessionTimeoutService in your main app component to start and reset the countdown based on user activity.
// app.component.ts import { Component, OnInit } from '@angular/core'; import { SessionTimeoutService } from './path-to-session-timeout-service'; @Component({ selector: 'app-root', template: ` <div> <!-- Your app content goes here --> </div> `, }) export class AppComponent implements OnInit { constructor(private sessionTimeoutService: SessionTimeoutService) {} ngOnInit(): void { this.initializeSessionTimeout(); } private initializeSessionTimeout(): void { this.sessionTimeoutService.startCountdown(); // Add event listeners for user activity to reset the countdown window.addEventListener('mousemove', () => this.sessionTimeoutService.resetCountdown()); window.addEventListener('keypress', () => this.sessionTimeoutService.resetCountdown()); // You can add more events such as 'click', 'scroll', etc., based on your application's needs } }
  1. Usage: Inject SessionTimeoutService wherever you need to track user activity and reset the countdown. For example, you can inject it in components where you have user interaction.

Note: Make sure to adapt the code according to your application's structure and routing requirements. Also, consider handling the idle timeout in a more secure way if it involves sensitive user data.

Examples

  1. "Angular session timeout implementation with timer display"

    • Code Implementation:
      // Example Angular service for session timeout import { Injectable } from '@angular/core'; import { Router } from '@angular/router'; @Injectable({ providedIn: 'root', }) export class SessionTimeoutService { private timer: any; constructor(private router: Router) {} startTimeout(minutes: number) { const milliseconds = minutes * 60 * 1000; this.timer = setTimeout(() => this.redirectToPreviousPage(), milliseconds); } resetTimeout(minutes: number) { clearTimeout(this.timer); this.startTimeout(minutes); } redirectToPreviousPage() { // Implement redirection logic this.router.navigate(['/previous-page']); } }
    • Description: Defines an Angular service with methods to start, reset, and redirect on session timeout.

  2. "Angular session timeout timer display component"

    • Code Implementation:
      <!-- Example Angular component for displaying timeout timer --> <div *ngIf="timeLeft > 0">{{ timeLeft | date: 'mm:ss' }}</div> 
      // Corresponding Angular component logic import { Component, OnInit } from '@angular/core'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Component({ selector: 'app-timer-display', templateUrl: './timer-display.component.html', }) export class TimerDisplayComponent implements OnInit { timeLeft: number; constructor(private sessionTimeoutService: SessionTimeoutService) {} ngOnInit() { this.sessionTimeoutService.startTimeout(10); // Set initial timeout in minutes this.startTimer(); } startTimer() { setInterval(() => { this.timeLeft = this.calculateTimeLeft(); }, 1000); } calculateTimeLeft(): number { // Implement logic to calculate time left based on session timeout return 600; // Placeholder value, representing 10 minutes } }
    • Description: Creates an Angular component to display the session timeout timer.

  3. "Angular session timeout warning modal"

    • Code Implementation:
      <!-- Example Angular component for session timeout warning modal --> <div class="modal" *ngIf="showModal"> <div class="modal-content"> <p>Your session will timeout soon. Do you want to continue?</p> <button (click)="resetTimeout()">Yes</button> <button (click)="logout()">No</button> </div> </div> 
      // Corresponding Angular component logic import { Component, OnInit } from '@angular/core'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Component({ selector: 'app-timeout-warning', templateUrl: './timeout-warning.component.html', }) export class TimeoutWarningComponent implements OnInit { showModal = false; constructor(private sessionTimeoutService: SessionTimeoutService) {} ngOnInit() { this.sessionTimeoutService.startTimeout(10); // Set initial timeout in minutes this.startWarningCheck(); } startWarningCheck() { setInterval(() => { if (this.sessionTimeoutService.isTimeoutSoon()) { this.showModal = true; } }, 1000); } resetTimeout() { this.sessionTimeoutService.resetTimeout(10); // Reset timeout in minutes this.showModal = false; } logout() { // Implement logout logic this.showModal = false; } }
    • Description: Implements a warning modal that appears when the session timeout is approaching.

  4. "Angular session timeout redirect to login page"

    • Code Implementation:
      // Example Angular component with route guard for session timeout redirection import { Injectable } from '@angular/core'; import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Injectable({ providedIn: 'root', }) export class AuthGuard implements CanActivate { constructor(private sessionTimeoutService: SessionTimeoutService, private router: Router) {} canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean { if (this.sessionTimeoutService.isTimedOut()) { this.router.navigate(['/login']); // Redirect to login page return false; } return true; } }
    • Description: Implements a route guard to redirect to the login page on session timeout.

  5. "Angular session timeout event listener"

    • Code Implementation:
      // Example Angular component with session timeout event listener import { Component, OnInit } from '@angular/core'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'], }) export class AppComponent implements OnInit { constructor(private sessionTimeoutService: SessionTimeoutService) {} ngOnInit() { this.sessionTimeoutService.timeoutEvent.subscribe(() => { this.handleTimeout(); }); } handleTimeout() { // Implement logic to handle session timeout event // e.g., show a modal, redirect, or perform other actions } }
    • Description: Listens for a session timeout event and triggers a corresponding action.

  6. "Angular session timeout interceptor for API requests"

    • Code Implementation:
      // Example Angular HTTP interceptor for handling session timeout errors import { Injectable } from '@angular/core'; import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpErrorResponse } from '@angular/common/http'; import { Observable, throwError } from 'rxjs'; import { catchError } from 'rxjs/operators'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Injectable() export class SessionTimeoutInterceptor implements HttpInterceptor { constructor(private sessionTimeoutService: SessionTimeoutService) {} intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { return next.handle(request).pipe( catchError((error: HttpErrorResponse) => { if (error.status === 401) { this.sessionTimeoutService.triggerTimeout(); // Trigger session timeout event } return throwError(error); }) ); } }
    • Description: Implements an HTTP interceptor to handle session timeout errors for API requests.

  7. "Angular session timeout notification service"

    • Code Implementation:
      // Example Angular service for displaying session timeout notifications import { Injectable } from '@angular/core'; import { ToastrService } from 'ngx-toastr'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Injectable({ providedIn: 'root', }) export class NotificationService { constructor(private toastr: ToastrService, private sessionTimeoutService: SessionTimeoutService) {} init() { this.sessionTimeoutService.timeoutEvent.subscribe(() => { this.showTimeoutNotification(); }); } showTimeoutNotification() { this.toastr.warning('Your session is about to expire. Please save your work.', 'Session Timeout Warning', { closeButton: true, }); } }
    • Description: Utilizes a notification service (e.g., Toastr) to display session timeout warnings.

  8. "Angular session timeout with local storage"

    • Code Implementation:
      // Example Angular service using local storage for session timeout management import { Injectable } from '@angular/core'; const TIMEOUT_KEY = 'sessionTimeout'; @Injectable({ providedIn: 'root', }) export class SessionTimeoutService { private timer: any; startTimeout(minutes: number) { const milliseconds = minutes * 60 * 1000; localStorage.setItem(TIMEOUT_KEY, Date.now() + milliseconds); this.timer = setTimeout(() => this.redirectToPreviousPage(), milliseconds); } resetTimeout(minutes: number) { clearTimeout(this.timer); this.startTimeout(minutes); } isTimedOut(): boolean { const timeout = localStorage.getItem(TIMEOUT_KEY); return timeout && parseInt(timeout, 10) < Date.now(); } redirectToPreviousPage() { // Implement redirection logic // e.g., this.router.navigate(['/previous-page']); } }
    • Description: Uses local storage to manage session timeout, allowing persistence across page reloads.

  9. "Angular session timeout with idle timeout"

    • Code Implementation:
      // Example Angular service using ngx-idle for session and idle timeout management import { Injectable } from '@angular/core'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; import { Idle } from '@ng-idle/core'; @Injectable({ providedIn: 'root', }) export class SessionIdleService { constructor(private sessionTimeoutService: SessionTimeoutService, private idle: Idle) {} startIdleTimer(minutes: number) { this.idle.setIdle(minutes * 60); this.idle.setTimeout(0); this.idle.onTimeout.subscribe(() => this.sessionTimeoutService.triggerTimeout()); this.idle.watch(); } resetIdleTimer() { this.idle.stop(); this.idle.watch(); } }
    • Description: Integrates ngx-idle for managing both session and idle timeouts.

  10. "Angular session timeout with refresh token"

    • Code Implementation:
      // Example Angular service using refresh token for session timeout management import { Injectable } from '@angular/core'; import { HttpClient } from '@angular/common/http'; import { SessionTimeoutService } from 'path-to-session-timeout-service'; @Injectable({ providedIn: 'root', }) export class RefreshTokenService { private refreshTokenUrl = 'api/refresh-token'; constructor(private http: HttpClient, private sessionTimeoutService: SessionTimeoutService) {} startRefreshTokenTimer() { // Implement logic to request a new refresh token from the server // Set a timer for refreshing the token before it expires const refreshInterval = 15 * 60 * 1000; // Refresh every 15 minutes setInterval(() => { this.refreshToken(); }, refreshInterval); } refreshToken() { // Make a request to the server to refresh the token this.http.post(this.refreshTokenUrl, {}).subscribe( (response) => { // Handle successful token refresh this.sessionTimeoutService.resetTimeout(10); // Reset session timeout }, (error) => { // Handle token refresh error this.sessionTimeoutService.triggerTimeout(); // Trigger session timeout } ); } }
    • Description: Implements a refresh token mechanism to extend the session timeout by obtaining a new token from the server.

More Tags

productivity-power-tools negative-number uialertcontroller capacity androiddesignsupport cultureinfo manualresetevent fileapi super regex-group

More Programming Questions

More Electrochemistry Calculators

More Statistics Calculators

More Gardening and crops Calculators

More Chemical thermodynamics Calculators