Google Cloud Functions req/res 通过 node-fetch 实现 Promise

Question

我是 Javascript 的新手，我正在尝试在我使用的两项服务之间架起一座桥梁。目标只是获取主体或请求，对另一个服务进行承诺 api 调用，以响应该 api 调用的主体。我已经能够获取请求的主体并将其发送到服务，但我无法接收该响应并将该响应的主体作为函数的响应。请帮帮我。谢谢。

var moment = require('moment');
var CryptoJS = require("crypto-js");
const fetch = require('node-fetch');

var unixtime = moment().unix();
var apiUser = process.env.apiUser;
var secret = process.env.apiKey;
var url = process.env.url;

exports.test = (req, res) => {
  var message = req.body;
  message = JSON.stringify(message);
  var body = "{\n    \"ops\": [{\n        \"conv_id\": \"679690\",\n        \"type\": \"create\",\n        \"obj\": \"task\",\n        \"data\": message\n    }]\n}\n"
  body = body.replace(/message/ig, message);
  var signature = CryptoJS.enc.Hex.stringify(CryptoJS.SHA1(unixtime + secret + body + secret));

  function request1() {
    return new Promise((resolve, reject) => {

      var options = fetch(url+apiUser+'/'+unixtime+'/'+signature, {
          method: 'post',
          body: body,
          headers: { 'Content-Type': 'application/json' },
      });

      options.then(res => {
          var result = res.json;
          console.log(result);
          resolve(result);
        })
        .catch(() => { // if .then fails
          console.log('Promise rejected');
          let rejectMessage = 'Sorry, an error occurred.';
          reject(rejectMessage); // Promise rejected
        });
    });
  }

  request1();
};

Answer 1

您可以轻松检索 result 对象，因为函数 request1 returns 是一个解决该对象的承诺，所以这应该有效：

request1().then((resultObject)=>{
    //resultObject === result
    return res.send(resultObject);
});

此外，res.json()returns一个承诺，所以你应该做：

options.then(res => res.json()).then(result => {
          console.log(result);
          resolve(result);
        })

Google Cloud Functions req/res 通过 node-fetch 实现 Promise

Google Cloud Functions req/res with Promise by node-fetch

javascript

node.js

promise

google-cloud-functions

node-fetch