Question

我知道每个HTTP函数都必须以end（）或send（）结尾，因此我认为这可能与我的问题有关。我正在构建要在Firebase上托管的Shopify应用。我已经对其进行身份验证和安装，但是当我尝试通过POST捕获永久访问令牌时，Firebase超时。相同的代码可以与ngrok一起正常工作。整个路由功能如下。

const dotenv = require('dotenv').config();
const functions = require('firebase-functions');
const express = require('express');

const app = express();
const crypto = require('crypto');
const cookie = require('cookie');
const nonce = require('nonce')();
const querystring = require('querystring');
const request = require('request-promise');

const apiKey = process.env.SHOPIFY_API_KEY;
const apiSecret = process.env.SHOPIFY_API_SECRET;
const scopes = 'read_products,read_customers';
const forwardingAddress = 'https://my-custom-app.firebaseapp.com/app';

app.get('/app/shopify/callback', (req, res) => {
  const { shop, hmac, code, state } = req.query;
  const stateCookie = cookie.parse(req.headers.cookie).__session;

  if (state !== stateCookie) {
    return res.status(403).send('Request origin cannot be verified');
  }

  if (shop && hmac && code) {
    // DONE: Validate request is from Shopify
    const map = Object.assign({}, req.query);
    delete map['signature'];
    delete map['hmac'];
    const message = querystring.stringify(map);

  const generatedHash = crypto
    .createHmac('sha256', apiSecret)
    .update(message)
    .digest('hex');

  if (generatedHash !== hmac) {
    return res.status(400).send('HMAC validation failed');
  }


  // Collect permanent access token
  const accessTokenRequestUrl = 'https://' + shop + '/admin/oauth/access_token';
  const accessTokenPayload = {
    client_id: apiKey,
    client_secret: apiSecret,
    code,
  };

  // Everything works up until here

  request.post(accessTokenRequestUrl, { json: accessTokenPayload })
    .then((accessTokenResponse) => {
        const accessToken = accessTokenResponse.access_token;

        // If below is uncommented, it will not show on browser, Firebase seems to timeout on the above request.post.
        //res.status(200).send("Got an access token, let's do something with it");

        // Use access token to make API call to 'shop' endpoint
        const shopRequestUrl = 'https://' + shop + '/admin/shop.json';
        const shopRequestHeaders = {
            'X-Shopify-Access-Token': accessToken,
        };

        request.get(shopRequestUrl, { headers: shopRequestHeaders })
            .then((shopResponse) => {
                res.end(shopResponse);
            })
            .catch((error) => {
                res.status(error.statusCode).send(error.error.error_description);
            });

    })
        .catch((error) => {
            res.status(error.statusCode).send(error.error.error_description);
        });
  } else {
res.status(400).send('Required parameters missing');
  }
});

exports.shopifyValidate = functions.https.onRequest(app);

Answer 1

您打错了response.end()：

    request.get(shopRequestUrl, { headers: shopRequestHeaders })
        .then((shopResponse) => {
            res.end(shopResponse);
        })

从链接的文档中可以看到，end（）不带参数。它只是结束响应。如果您有要发送的数据，则可能要调用send（）来代替。

如果不确定函数的执行方式，还可以使用console.log()记录消息以准确了解其功能。仅仅希望一堆代码可以正常工作，这是一个好主意-您应该验证它是否按预期的方式工作。

Answer 2

您用于request.post()的请求模块是什么请参阅：https://www.npmjs.com/package/request#promises--asyncawait

我希望您使用的是https://github.com/request/request-promise模块，而不是请求。

Answer 3

已解决。事实证明，您需要付费计划（Blaze，即付即用）才能访问外部API。我升级并解决了问题。

请求后Firebase Cloud功能超时

3 个答案: