如何取消 Angular 2 中的 HTTPRequest? [英] How to cancel a HTTPRequest in Angular 2?

问题描述

如何在 Angular 2 中取消 HTTPRequest?

How to cancel a HTTPRequest in Angular 2?

我只知道如何拒绝请求承诺.

I know how to reject the request promise only.

return new Promise((resolve, reject) => {
    this.currentLoading.set(url, {resolve, reject});

    this.http.get(url, {headers: reqHeaders})
        .subscribe(
            (res) => {
                res = res.json();

                this.currentLoading.delete(url);
                this.cache.set(url, res);

                resolve(res);
            }
        );
});

推荐答案

可以拨打unsubscribe

let sub = this.http.get(url, {headers: reqHeaders})
            .subscribe(
                (res) => {
                    res = res.json();

                    this.currentLoading.delete(url);
                    this.cache.set(url, res);

                    resolve(res);
                }
            );

sub.unsubscribe();

更多信息在这里:http://www.syntaxsuccess.com/viewarticle/angular-2.0-and-http

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