如何在Angular中的HTTP拦截器中阻止某些HTTP请求

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

@Injectable()
export class MyInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 判断是否需要阻止某些HTTP请求
    if (/* 判断条件 */) {
      // 阻止请求，直接返回一个空的Observable对象
      return new Observable<HttpEvent<any>>();
    }

    // 不需要阻止请求，继续处理该请求
    return next.handle(request);
  }
}

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { MyInterceptor } from './my-interceptor';

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