angular rxjs catchError status 是0 但实际请求状态码是401

Question

api.service.ts

    request(method, url, data = {}) {
        const headers = {
            'Content-Type': 'application/json',
            'X-Token-With': this.token(),
            'Authorization': localStorage.getItem('__accessToken') ? localStorage.getItem('__accessToken') : 'noAuth',
        };
        const trim = s => s === undefined || s === null ? '' : s;
        const args: any = [[
            window['baseUrl'],
            url.replace(/:([^&;/?]+)/g, (...s) => trim(data[s[1]])),
        ].join('/')];

        const params = Object.keys(data).reduce((obj, key) => {
            obj[key] = trim(data[key]);
            return obj;
        }, {});
        if (method === 'get' || method === 'delete') {
            // args.push({ headers, params });
            args.push({ headers, params, observe: "response", responseType: "json" });
        } else {
            args.push(params, { headers, observe: "response", responseType: "json" });
        }

        return this.http[method](...args).pipe(
            map(response => {
                if (response['ok']) {
                    return response['body'];
                } else {
                }
            }),
            catchError(error => this.handleError(error))
        )
    }

    handleError(response: any) {
        let errorMessage: any = {};
        console.log(response)
        if (response.error.status == 0) {
            errorMessage = {
                success: false,
                status: 0,
                data: 'Sorry, there was a connection error occurred. Please try again.'
            };
            return throwError(errorMessage);
        }
        if (response.error.status == 401) {
            localStorage.clear();
            this.router.navigate(['/login']);
        }
        if (response.error.status != 0 && response.error.status != 401) {
            errorMessage = response.error;
            const { status, statusText, error } = errorMessage;
            const errors = error ? error.message : '服务器错误';
            this.notify.create(
                'error',
                `${errors}`,
                errorMessage.error,
            );
            return throwError(errorMessage);
        }

    }

Answer 1

如果错误被浏览器安全机制拦截，那么状态会是0，而且其他所有信息都取不到。比如同源策略跨域访问拦截

Answer 2

求大神指路 感谢