Angular 8在身份验证完成之前抑制HTTP调用

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

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 在此处进行身份验证检查
    const isAuthenticated = ... // 检查用户是否已完成身份验证

    if (!isAuthenticated) {
      // 如果用户未完成身份验证，可以进行重定向或显示错误信息
      // 例如，重定向到登录页面
      // 或者显示一个错误提示框
      return throwError('未完成身份验证');
    }

    // 如果用户已完成身份验证，则继续发送请求
    return next.handle(request);
  }
}

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { AuthInterceptor } from './auth.interceptor';

@NgModule({
  imports: [HttpClientModule],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: AuthInterceptor,
      multi: true
    }
  ]
})
export class AppModule { }