1. 使用身份验证保护(实现 CanActivate) 以防止未经身份验证的用户.请参阅带有示例的官方文档和此博客.

2. 使用 RouterStateSnapshot用于捕获请求的 URL 的身份验证保护.

1. Use Auth Guards (implements CanActivate) to prevent unauthenticated users. See official documentation with examples and this blog.

2. Use RouterStateSnapshot in the auth guard to capture the requested URL.

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) 
{
    // keep the attempted URL for redirecting
    this._loginService.redirectUrl = state.url;
}