angular的拦截器与retry

引用中文文档里一句话 image.png

这就引出了一个问题，如果我们有a、b两个拦截器，如果ab两个拦截器已经对错误做出了处理的话，retry会失效，所以我们要写一个拦截器c，放在ab后面，以便让响应时的处理为c->b->a

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

@Injectable()
export class RetryInterceptor implements HttpInterceptor{
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    return next.handle(req)
    .pipe(
      retry(3)
    )
  }

}