来自Node.js服务器应用程序的SendGrid CORS错误

我只是想从SendGrid文档中得到一个简单的例子。这段代码是从我的Node.js+Express应用程序中调用的:

function sendConfirmationEmail() {
    const sgMail = require('@sendgrid/mail');
    sgMail.setApiKey(process.env.SENDGRID_API_KEY);
    const msg = {
        to: '[email protected]', // Change to your recipient
        from: '[email protected]', // Change to your verified sender
        subject: 'Hello, world!',
        text: 'Thank you for your interest. We will let you know if we need any more information.',
        html: '<strong>Thank you for your interest. We will let you know if we need any more information.</strong>',
    };
    sgMail
        .send(msg)
        .then(() => {
            console.log('Email sent')
        })
        .catch((error) => {
            console.error(error)
        });
}

看到此记录:

> { Error: Forbidden
    at axios.then.catch.error (node_modules/@sendgrid/client/src/classes/client.js:146:29)
    at process._tickCallback (internal/process/next_tick.js:68:7)
  code: 403,
  message: 'Forbidden',
  response:
   { headers:
      { server: 'nginx',
        date: 'Sat, 27 Feb 2021 15:58:48 GMT',
        'content-type': 'application/json',
        'content-length': '281',
        connection: 'close',
        'access-control-allow-origin': 'https://sendgrid.api-docs.io',
        'access-control-allow-methods': 'POST',
        'access-control-allow-headers': 'Authorization, Content-Type, On-behalf-of, x-sg-elas-acl',
        'access-control-max-age': '600',
        'x-no-cors-reason': 'https://sendgrid.com/docs/Classroom/Basics/API/cors.html' },
     body: { errors: [Array] } } }

不知道为什么这是CORS错误 不 发生在浏览器中。有什么想法吗?

SendGrid建议的解决方法没有帮助:

您可以创建一个基于服务器的应用程序,这将保护您的API密钥不被发布到世界各地。可以实现NodeJS、PHP、Ruby、Python、C#、Go和Java等语言,以便从锁定服务器环境的安全性中调用API。