如何使用Interceptor（Angular）刷新令牌

Question

我需要找到在后台以角度刷新令牌的方法。

当我必须在本地存储中令牌化时，它的工作很好，但是当令牌在服务器中过期时，它不会加载该页面，因此我需要手动刷新它。我还希望如果用户在本地存储中没有任何内容，则调用该函数并获取新令牌。

这是我的拦截器：

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';
import { AuthService } from '../services/auth.service';

@Injectable()
export class HeaderInterceptor implements HttpInterceptor {
    constructor(public authService: AuthService) { }
    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        const token = localStorage.token;
        if (!token) {
            alert('User Not Authorize');
          return next.handle(request);
        }
        request = request.clone({
            setHeaders: {
                'Content-Type': 'application/json',
                'x-auth-token': token
            }
        });
        return next.handle(request);
    }
}

验证服务：

import { Injectable } from '@angular/core';
import { HttpService } from '../http/http.service';
import * as jwt_decode from 'jwt-decode';

@Injectable({
  providedIn: 'root'
})
export class AuthService {

  constructor(private http: HttpService) { }

  authUser(userID) {
    if (localStorage.getItem('token') === null) {
      this.http.authUser(userID).subscribe((data) => {
        localStorage.setItem('token', data.token);
      }, error => {
        console.log(error);
      });
    }
  }

  getCurrentUser() {
    try {
      const jwt = localStorage.getItem('token');
      return jwt_decode(jwt);
    } catch (error) {
      return null;
    }
  }

}