如何在拦截器中取消当前请求-Angular 4 [英] How to cancel current request in interceptor - Angular 4

问题描述

如您所知，可以在新版本的Angular 4中使用 Interceptors .

As you know it's possible to use Interceptors in new versions of Angular 4.

在我的情况下，我想在某些情况下取消拦截器中的请求. 那有可能吗?也许我应该问的是，我应该采用哪种方式?

In mine, I want to cancel a request in interceptor in some conditions. So is it possible? or maybe what should I ask is, Which way I should do that?

也可以！如果我找到了一种重写请求的响应而不是取消请求的方法.

Also It will be Ok! if I found a way to rewrite some response to the request instead of canceling it.

推荐答案

我认为要切断拦截器链，您要做的就是简单地返回一个空的Observable，如下所示:

I think all you have to do to cut the interceptor chain is to simply return an empty Observable like so:

import { EMPTY } from 'rxjs';

intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
  if (stopThisRequest) {
    return EMPTY;
  }

  return next.handle(request);
}

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