node.js - 了解异步函数 --> 第二个函数运行很快

Question

我进行 API 调用以获取第二个函数所需的令牌。但是这个运行很快，所以没有数据。（我得到一个错误，json 意外结束）。在此之后，我打了 4 次矿石电话。我在谷歌应用程序脚本中制作了这个，但漏洞脚本大约需要 17 分钟。所以我想在 NodeJS 中创建它并部署在 firebase 上，然后为应用程序脚本创建一个端点以获取已经准备好的数据。

第一个函数

const express = require('express');
const app = express();
const fetch = require('node-fetch'); 
const resid = require('./calls.js');


/*
Here we start with the request to get a new token. And pass this on in the request's later on.
*/
async function getToken() {

    const config = {
        method: 'post',
        headers: {}
    };

    const url = 'https://theapirurl.com';

    const response = await fetch(url, config);
    const json = await response.json();
    const token = json['access_token'];

    await resid.getReservationIds(token);

}

getToken()

第二个功能（在calls.js上）

const fetch = require('node-fetch'); 

async function getReservationIds(token) {

    const url = "https://theapiurl.com";
    const config = {
        
        method: "get",
        muteHttpExceptions: true,
        headers: {
            "Authorization": "bearer" + token
        }
    };

    const respone = await fetch(url, config);
    const json = await respone.json();

    //console.log(json);

}

module.exports = {
    resid: getReservationIds()
}

我究竟做错了什么？

编辑

现在我得到这个错误：

(node:43371) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at https://apiurlfromcallsjs.com reason: Unexpected end of JSON input
    at /Users/remco/functions/node_modules/node-fetch/lib/index.js:272:32
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async getReservationIds (/Users/remco/functions/calls.js:20:18)
(node:43371) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:43371) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:43371) UnhandledPromiseRejectionWarning: TypeError: getReservationIds is not a function
    at getToken (/Users/remco/functions/index.js:23:11)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:43371) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 3)

标签： node.jsasync-awaitfetchfetch-api

Answer 1

您正在立即调用第二个函数，而不是等待第一个函数完成：

module.exports = {
    resid: getReservationIds()
}

所以当你跑

const resid = require('./calls.js');

此时，第二个函数已经在运行（并且resid.getReservationIds是一个 Promise，而不是一个函数）。

只导出函数：

module.exports = getReservationIds;

然后导入并调用它：

const getReservationIds = require('./calls.js');
// ...
  await getReservationIds(token);