Angular chained HTTP Posts返回错误402但被捕获为错误504

Question

我正在尝试在我们的API（ 由kong API发送 ）调用返回的错误402上收到错误消息，但我的事务服务正在捕获错误浏览器显示错误HTTP 402时的HTTP 504。

It shows an Error 402 with a proper response, but my error message is showing as an Error 504

我的httpClient调用如下：

sendCashOutRequest(transaction: Transaction): Promise<{ success: boolean, msg: string }> {
    let success = false;
    console.log("generating send request ...");
    const authUrl = environment.authAPI;
    const remittanceUrl = environment.sendMoneyAPI;
    const remittanceRequestBody = this.buildRemittanceRequestBody(transaction);
    this.showLoader();
    let resultToken;
    let sendPromise = new Promise<{ success: boolean, msg: string }>( (resolve,reject) => {
        //this will post to get authentication token
        this.authBearerService.getAuthToken().then( token => {
            resultToken = token
            console.log("First API call (auth request) : " + resultToken);
            return this.http.post(remittanceUrl, remittanceRequestBody, {
                observe: 'response',
                headers: new HttpHeaders()
                .set('Content-Type', 'application/json')
                .set('Authorization', 'Bearer ' + resultToken),
                responseType: 'json'
            } ).toPromise()
            .then(
                resp2 => {
                    console.log("Successfully sent transfer request!", resp2);
                    //get response body                  
                    success = true;
                    this.hideLoader();
                    resolve( {success: success, msg: transaction.PayRefNo});
                }, 
                err => {
                    console.warn("Error encountered!!");
                    console.warn("has message body? ",err.body['message']);
                    reject( { success, msg: err.error.message });
                }
            ).catch( err => {
                console.log("Error in sending cash out request", err);
                reject( {success : success, msg : "Error connecting to Seven Connect services, Please try again"});
            });
        });
    });

    return sendPromise;
}

浏览器和角度之间是否有某种东西它赢得了+无法捕获错误402？或者我是否错误地链接了我的帖子请求？