使用aysnc Javascript http请求中的数据?(aws无服务器)

Question

我正在使用nodejs无服务器模块来创建lambda-aws函数。

'use strict';
const request = require('request');
const options = {
url: 'https://api.mysportsfeeds.com/v2.0/pull/nfl/2018-regular/games.json',
method: 'GET',
headers: {
"Authorization": "Basic " + Buffer.from("1da103" 
+ ":" + "MYSPORTSFEEDS").toString('base64')
}
}
//this is automatically called by aws
module.exports.hello = async (event, context) => {
let result;
request.get(options, (error, response, body) => {
result = JSON.parse(body).lastUpdatedOn; //never happens cuz of async
});
return {
statusCode: 200,
body: JSON.stringify({
message: 'Go Serverless v1.0! Your function executed successfully!',
input: result,
}),
};
};

我遇到的问题是，我无法从get请求返回输出，因为对结果变量的赋值(在异步get请求中(发生在return语句之后。我不认为我可以将外部函数变成get请求的回调函数。我该如何解决这个问题？

Answer 1

另一种选择是提取请求逻辑并将其放入一个新函数中。

请记住，您需要捕获任何错误，因此使用try-catch块来执行此操作

'use strict';
const request = require('request');
const options = {
url: 'https://api.mysportsfeeds.com/v2.0/pull/nfl/2018-regular/games.json',
method: 'GET',
headers: {
"Authorization": "Basic " + Buffer.from("1da103"
+ ":" + "MYSPORTSFEEDS").toString('base64')
}
};
function getResult() {
return new Promise(function (resolve, reject) {
request.get(options, (error, response, body) => {
if (error) return reject(error);
resolve(JSON.parse(body).lastUpdatedOn); //never happens cuz of async
});
});
}
//this is automatically called by aws
module.exports.hello = async (event, context) => {
let result = await getResult();
return {
statusCode: 200,
body: JSON.stringify({
message: 'Go Serverless v1.0! Your function executed successfully!',
input: result,
}),
};
};