不能用npm指数退避进行重试

Question

Node，如您所见，我试图在响应失败时调用相同的url。我在这里做了什么错事

import * as request from 'request';

var url = 'https://www.abcxyz.com';

export class ServiceClass {
    public getRequest(): any {
        request.get(url, null, (error: any, meta: any, response: any) => {
            console.log("1111", response);
        })
    }

}

import { ServiceClass } from './GithubApiService';
import { backOff } from "exponential-backoff";

const service = new ServiceClass();

async function test() {
    const response = await backOff(() => service.getRequest(),
        { numOfAttempts: 3, maxDelay: 2000, retry: (e: any, attemptNumber: 1) => true })
};

test();

Answer 1

基于https://www.npmjs.com/package/exponential-backoff文档，您的getRequest没有返回允诺值，因此应该这样做：

export class ServiceClass {
    public getRequest(): any {
        return new Promise((resolve, reject) => {
          request.get(url, null, (error: any, meta: any, response: any) => {
            if (error) return reject(error);
            resolve(response);
          });
        })
    }
}