我们可以在Firebase的云函数中使用async/await吗?

Question

我必须调用函数：getMatchDataApi((和saveApiDataToDb((。 getMatchDataApi(( 函数从 api 返回值，saveApiDataToDb(( 函数用于将 getMatchDataApi(( 值存储到 firestore 数据库中。

function getMatchDataApi() {
var options = {
method: "GET",
hostname: "dev132-cricket-live-scores-v1.p.rapidapi.com",
port: null,
path: "/scorecards.php?seriesid=2141&matchid=43431",
headers: {
"x-rapidapi-host": "dev132-cricket-live-scores-v1.p.rapidapi.com",
"x-rapidapi-key": "63e55e4f7fmsh8711fb1c0bd9ec2p1d8b4bjsne2b8db0a1a82"
},
json: true
};
var req = http.request(options, res => {
var chunks = [];
res.on("data", chunk => {
chunks.push(chunk);
});
res.on("end", () => {
var body = Buffer.concat(chunks);
var json = JSON.parse(body);
playerName = json.fullScorecardAwards.manOfTheMatchName;
console.log("player name", playerName);
});
});
req.end();
}

async function saveApiDataToDb() {
await getMatchDataApi();
var name = playerName;
console.log("Aman Singh", name);
}

在这里，我正在使用异步功能。所以首先我希望它应该首先执行这个getMatchDataApi((并返回值，然后它应该在这个函数saveApiDataToDb((中打印值。 然后我调用saveApiDataToDb((，如下所示：

exports.storeMatchData = functions.https.onRequest((request, response) => {
saveApiDataToDb()
});

Answer 1

是的，您可以在云函数中使用 async/await。但是，您无法在Spark计划(免费计划(中访问/获取Google服务器之外的数据。 希望这有帮助。

按如下方式修改functions/index.js文件：

const functions = require('firebase-functions');
const request = require('request');

exports.storeMatchData = functions.https.onRequest( async (req, res) => {
let body = '';
await getMatchDataApi().then(data => body = data).catch(err => res.status(400).end(err));
if (!body) {
return res.status(404).end('Unable to fetch the app data :/');
}
// let json = JSON.parse(body);
// playerName = json.fullScorecardAwards.manOfTheMatchName;
// console.log("Aman Singh", playerName);
res.send(body);
});
function getMatchDataApi() {
const options = {
url: 'https://dev132-cricket-live-scores-v1.p.rapidapi.com/scorecards.php?seriesid=2141&matchid=43431',
headers: {
"x-rapidapi-host": "dev132-cricket-live-scores-v1.p.rapidapi.com",
"x-rapidapi-key": "63e55e4f7fmsh8711fb1c0bd9ec2p1d8b4bjsne2b8db0a1a82"
},
};
return cURL(options);
}

function cURL(obj, output = 'body') {
return new Promise((resolve, reject) => {
request(obj, (error, response, body) => {
if (error)
reject(error);
else if (response.statusCode != 200)
reject(`cURL Error: ${response.statusCode} ${response.statusMessage}`);
else if (response.headers['content-type'].match(/json/i) && output == 'body')
resolve(JSON.parse(body));
else if (output == 'body')
resolve(body);
else
resolve(response);
});
});
}

Answer 2

我尝试在云函数中使用 promise 来解决我的问题。 所以它可以帮助某人。 这是我的云函数

exports.storeMatchData = functions.https.onRequest((request, response) => {
a().then(
result => {
saveApiDataToDb(result);
},
error => {}
);
});

这是我调用 api 并首先解析其数据所需的函数

var options = {
method: "GET",
hostname: "dev132-cricket-live-scores-v1.p.rapidapi.com",
port: null,
path: "/scorecards.php?seriesid=2141&matchid=43431",
headers: {
"x-rapidapi-host": "dev132-cricket-live-scores-v1.p.rapidapi.com",
"x-rapidapi-key": "63e55e4f7fmsh8711fb1c0bd9ec2p1d8b4bjsne2b8db0a1a82"
},
json: true
};
var options1 = {
method: "GET",
hostname: "dev132-cricket-live-scores-v1.p.rapidapi.com",
port: null,
path: "/matches.php?completedlimit=5&inprogresslimit=5&upcomingLimit=5",
headers: {
"x-rapidapi-host": "dev132-cricket-live-scores-v1.p.rapidapi.com",
"x-rapidapi-key": "63e55e4f7fmsh8711fb1c0bd9ec2p1d8b4bjsne2b8db0a1a82"
}
};
var a = function getMatchDataApi() {
// Return new promise
return new Promise((resolve, reject) => {
// Do async job
let firstTask = new Promise((resolve, reject) => {
var req = http.request(options, res => {
var chunks = [];
var arr = [];
res.on("data", chunk => {
chunks.push(chunk);
});
res.on("end", () => {
var body = Buffer.concat(chunks);
var json = JSON.parse(body);
const playerName = json.fullScorecardAwards.manOfTheMatchName;
resolve(playerName);
});
});
req.end();
});
let secondTask = new Promise((resolve, reject) => {
var req = http.request(options1, res => {
var chunks = [];
var arr = [];
res.on("data", chunk => {
chunks.push(chunk);
});
res.on("end", () => {
var body = Buffer.concat(chunks);
var json = JSON.parse(body);
const playerName = json;
resolve(playerName);
});
});
req.end();
});
Promise.all([firstTask, secondTask]).then(
result => {
resolve(result);
},
error => {
reject(error);
}
);
});
};

这是我在此函数中解析后将使用getMatchDataApi((值的函数。

function saveApiDataToDb(data) {
console.log("Name of player", data[0]);
}