React 联系表中的 CORS 错误 Firebase Cloud Functions

Question

我有一个 React 联系表单，使用 firebase 云功能处理发送带有 nodemailer 的电子邮件和一个 axios post 请求以将数据存储在我的 firestore 数据库中。我在我的函数中使用了 CORS，但在提交表单时我的控制台中仍然出现 CORS 错误。

来自来源“http://localhost:3000”的 'https://.cloudfunctions.net/submit' 处的 XMLHttpRequest 访问已被 CORS 策略阻止：请求的资源上不存在 'Access-Control-Allow-Origin' header。我花了大约 2 个小时在谷歌上搜索，从我读到的内容看来，如果我有 const cors = require('cors')({origin: true});它应该工作。任何帮助都会很棒。

const functions = require('firebase-functions');
const nodemailer = require('nodemailer');
const cors = require('cors')({origin: true});
const gmailEmail = functions.config().gmail.email;
const gmailPassword = functions.config().gmail.password;

const mailTransport = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: gmailEmail,
    pass: gmailPassword,
  },
});

exports.submit = functions.https.onRequest((req, res) => {
  cors(req, res, () => {
    if (req.method !== 'POST') {
      return;
    }
    const mailOptions = {
      from: req.body.email,
      replyTo: req.body.email,
      to: gmailEmail,
      subject: `${req.body.name} submitted a quote request!`,
      text: req.body.message,
      html: `<p>{req.body.message}</p>`,
    };
    mailTransport.sendMail(mailOptions).then(() => {
      console.log('New email sent to:', gmailEmail);
      res.status(200).send({ isEmailSend: true });
      return;
    });
  });
});


// This snippet is in my contact.js component
const sendEmail = () => {
    axios
      .post(
        'https://<myurl>.cloudfunctions.net/submit',
        formData
      )
      .then((res) => {
        db.collection('emails').add({
          name: formData.name,
          email: formData.email,
          phone: formData.phone,
          message: formData.message,
          time: new Date(),
        });
      })
      .catch((err) => {
        console.log(err);
      });
  };

Answer 1

我删除了云函数并重新创建它，我不再有 cors 问题。

React 联系表中的 CORS 错误 Firebase Cloud Functions

CORS Error Firebase Cloud Functions in React Contact Form

reactjs

firebase

google-cloud-firestore

google-cloud-functions

nodemailer