使用 Firebase HTTP 函数（Firebase、Stripe OAuth、React (JSX) 前端）将授权代码返回到 Stripe

Question

我有一个 React 前端，Firebase 后端尝试完成 Stripe OAuth 流程。重定向 URI 已返回（返回到 https://mywebsitename.com/oauth_return），并且我在该页面上打开的反应组件解析该 URL 并访问身份验证代码和状态。 （请看下文）

在“oauth_return.js”文件中

import React from 'react';
import queryString from 'query-string';

const oauth_redirect  = () => {

    //Parsing over URL
    const value=queryString.parse(window.location.search);
    const code=value.code;
    console.log('code:', code)
    const state=value.state;
    console.log('state:', state)
}
export default (oauth_redirect)

我遇到的困难是试图弄清楚如何使 firebase HTTP 函数通过 POST 方法返回身份验证代码。我所有的 firebase 函数都存在于函数目录的“index.js”文件中。我看到的所有教程都展示了在 Typescript 中构建此函数的各种方法，但我的代码需要用 Javascript 编写。

在“functions/index.js”文件中

(...)

  exports.stripeCreateOathResponseToken = functions.https.onRequest((req, res) => {

  (...) Not sure what to write in this function to return the authorization code. All tutorials I've found are written in Typescript.

});

不幸的是，我不明白如何触发这个 HTTP 函数首先被调用（即我是否需要在“oauth_return.js”文件中显式调用它？如何将授权代码传递给它? 最重要的是，它如何将授权码发回给 Stripe？

我们将不胜感激。

Answer 1

这是为您的确切目的而编写的工作代码。希望这对您提供解决方案有所帮助。

exports.stripeCreateOathResponseToken = functions.https.onRequest((req, res) => {

    res.set('Access-Control-Allow-Origin', '*');

    if (req.method === 'OPTIONS') {
        console.log('Executing OPTIONS request code block');
        res.set('Access-Control-Allow-Methods', 'POST');
        res.set('Access-Control-Allow-Headers', 'Origin, Content-Type, Accept');
        res.set('Access-Control-Max-Age', '3600');
        res.status(204).send('');
    } else if (req.method === 'POST') {
        console.log('Executing POST request code block');
        return oauthResponseCheck(req, res);
    }
    else {
        // Log, but ignore requests which are not OPTIONS or POST.
        console.log(`We received an invalid request method of type: ${req.method}`);
        return;
    }
});


function oauthResponseCheck(req, res) {
     // code: An authorization code you can use in the next call to get an access token for your user.
    // This can only be used once and expires in 5 minutes.

    // state: The value of the state parameter you provided on the initial POST request.
    const { code, state } = req.body;

    // Assert the state matches the state you provided in the OAuth link (optional).
    if (!stateMatches(state)) {
        console.log('Incorrect state parameter for state::', state)
        return res.status(403).json({ error: 'Incorrect state parameter: ' + state });
    }
   
    // Send the authorization code to Stripe's API.
    stripe.oauth.token({
        grant_type: 'authorization_code',
        code
    }).then(
        (response) => {
            var stripe_connected_account_id = response.stripe_user_id;
         
            console.log('Stripe Connected Account Saved successfully: ' + JSON.stringify(response));
            return res.status(200).json({
                status: true,
                message: 'Stripe Connected Account Saved successfully',
                data: response
            });

        },
        (err) => {
            if (err.type === 'StripeInvalidGrantError') {
                console.log('Invalid authorization code: ' + code);
                return res.status(400).json({
                    status: false,
                    message: 'Invalid authorization code.::' + code,
                }
                );
            } else {
                console.log('An unknown error occurred: ' + err);
                return res.status(500).json({
                    status: false,
                    message: 'An unknown error occurred.::' + err,
                });
            }
        }
    );
})