Question

好吧，我几乎到处都看过，而且显然有Firebase Cloud Functions，只要在数据库中创建新密钥，就可以用来向我发送电子邮件。但是，我无法从头开始以及如何做。有人可以帮我吗。

Answer 1

您确实可以在每次在数据库中创建新节点（即新密钥）时使用Cloud Function发送电子邮件。

请查看Realtime Database触发器here的文档，以及其中一个显示如何发送电子邮件的官方Cloud Functions示例here。

在示例中，发送电子邮件是为了响应用户帐户的创建和删除，但是将示例代码与Realtime Database触发器集成起来确实并不困难。

例如，您可以根据样本进行以下操作：

const functions = require('firebase-functions');
const nodemailer = require('nodemailer');
// Configure the email transport using the default SMTP transport and a GMail account.
// For Gmail, enable these:
// 1. https://www.google.com/settings/security/lesssecureapps
// 2. https://accounts.google.com/DisplayUnlockCaptcha
// For other types of transports such as Sendgrid see https://nodemailer.com/transports/
// TODO: Configure the `gmail.email` and `gmail.password` Google Cloud environment variables.
const gmailEmail = functions.config().gmail.email;
const gmailPassword = functions.config().gmail.password;
const mailTransport = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: gmailEmail,
    pass: gmailPassword,
  },
});

// Your company name to include in the emails
// TODO: Change this to your app or company name to customize the email sent.
const APP_NAME = 'xxxxxx';

exports.sendWelcomeEmail = functions.database.ref('/thePathYouWant/{pushId}')
    .onCreate((snapshot, context) => {

       const createdData = snapshot.val(); // data that was created

       const email = createdData.email; // The email of the user. We make the assumption that it is written at the new database node
       const displayName = createdData.displayName; // The display name of the user.

       return sendWelcomeEmail(email, displayName);
});

// Sends a welcome email to the given user.
async function sendWelcomeEmail(email, displayName) {
  const mailOptions = {
    from: `${APP_NAME} <noreply@firebase.com>`,
    to: email,
  };

  // The user subscribed to the newsletter.
  mailOptions.subject = `Welcome to ${APP_NAME}!`;
  mailOptions.text = `Hey ${displayName || ''}! Welcome to ${APP_NAME}. I hope you will enjoy our service.`;
  await mailTransport.sendMail(mailOptions);
  return console.log('New welcome email sent to:', email);
}

如果您完全不熟悉Cloud Functions for Firebase，那么最好遵循教程here并观看官方视频系列here。

在Firebase实时数据库中创建新密钥时，如何获取电子邮件

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