如何在get服务方法中进行验证，而不是在angular 9中返回整个json数据

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

@Injectable()
export class ValidationInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 在这里进行验证逻辑
    if (req.url.includes('/api/get')) {
      // 进行验证
    }

    // 继续处理请求
    return next.handle(req);
  }
}

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

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