如何从 Firebase 函数调用第三方 Rest API 以在 Google 上执行操作



我正在尝试从Firebase函数调用一个休息API,该函数服务器作为Google上操作的实现。

我尝试了以下方法:

const { dialogflow } = require('actions-on-google');
const functions = require('firebase-functions');
const http  = require('https');
const host = 'wwws.example.com';
const app = dialogflow({debug: true});
app.intent('my_intent_1', (conv, {param1}) => {
// Call the rate API
callApi(param1).then((output) => {
console.log(output);
conv.close(`I found ${output.length} items!`); 
}).catch(() => {
conv.close('Error occurred while trying to get vehicles. Please try again later.'); 
});
});
function callApi (param1) {
return new Promise((resolve, reject) => {
// Create the path for the HTTP request to get the vehicle
let path = '/api/' + encodeURIComponent(param1);
console.log('API Request: ' + host + path);

// Make the HTTP request to get the vehicle
http.get({host: host, path: path}, (res) => {
let body = ''; // var to store the response chunks
res.on('data', (d) => { body += d; }); // store each response chunk
res.on('end', () => {
// After all the data has been received parse the JSON for desired data
let response = JSON.parse(body);
let output = {};
//copy required response attributes to output here
console.log(response.length.toString());
resolve(output);
});
res.on('error', (error) => {
console.log(`Error calling the API: ${error}`)
reject();
});
}); //http.get
});     //promise
}
exports.myFunction = functions.https.onRequest(app);

这几乎是有效的。调用 API,我取回数据。问题是,如果没有 async/await,该函数不会等待"callApi"完成,并且我从 Google 上的操作中收到一个错误,说没有响应。错误发生后,我可以在Firebase日志中看到控制台.log输出,因此一切正常,只是不同步。

我尝试使用async/await,但出现错误,我认为这是因为Firebase使用不支持异步的旧版本的节点.js该节点不支持异步。

我该如何解决这个问题?

您的函数callApi返回一个承诺,但您不会在意图处理程序中返回承诺。应确保添加return,以便处理程序知道等待响应。

app.intent('my_intent_1', (conv, {param1}) => {
// Call the rate API
return callApi(param1).then((output) => {
console.log(output);
conv.close(`I found ${output.length} items!`); 
}).catch(() => {
conv.close('Error occurred while trying to get vehicles. Please try again later.'); 
});
});

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