如何使 nodemailer 在多个模块中可重用？

Question

我在用户注册后实现了nodemailer，方式如下：

let transporter = nodemailer.createTransport({
    service: 'gmail',
    auth: {
        user: process.env.EMAIL_USERNAME,
        pass: process.env.EMAIL_PASSWORD
    }
});

let mailOptions = {
    from: process.env.EMAIL_USERNAME,
    to: user.email,
    subject: 'Verify your account',
    text: 'Click here for verify your account'
};

transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
        return console.log(error);
    }
});

我不太喜欢这段代码，因为如果我需要在另一个 module 中发送电子邮件，我需要重写上面的所有内容。

由于我是 NodeJS 的新手，我想知道我是否可以删除此代码冗余，使之成为 utility 或 helper class.目标是导入 wrapper class 并调用一个简单的函数来发送电子邮件。

最好的处理方法是什么？

Answer 1

您可以使用 module.exports 如下：

创建公共服务 mail.js 并在此处编写您的邮件发送代码

mails.js

module.exports = function (){
 // mail sent code
}

要求mail.js在其他服务中编写邮件发送代码并调用邮件发送功能

otherService.js

var mail = require('mail.js') // require mail sent in other service where you want to send mail
mail.sent() // call function of mail.js

Answer 2

我将您的代码重构为如下所示，然后将其另存为 mail.js

let transporter = nodemailer.createTransport({
    service: 'gmail',
    auth: {
        user: process.env.EMAIL_USERNAME,
        pass: process.env.EMAIL_PASSWORD
    }
});

let sendMail = (mailOptions)=>{
  transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
        return console.log(error);
    }
  });
};

module.exports = sendMail;

在您的其他模块中，说 activation.js

var mailer = require('./mail.js');

mailer({
    from: process.env.EMAIL_USERNAME,
    to: user.email,
    subject: 'Verify your account',
    text: 'Click here for verify your account'
};);

Answer 3

我为此创建了一个class：

import NodeMailer from 'nodemailer'
import emailConfig from '../../config/mail' // read email credentials from your config

class EmailSender {
    transport

    constructor() {
        this.transport = NodeMailer.createTransport({
            host: emailConfig.MAIL_HOST,
            port: emailConfig.MAIL_PORT,
            auth: {
                user: emailConfig.MAIL_USERNAME,
                pass: emailConfig.MAIL_PASSWORD,
            },
        })
    }

    async sendMessage(to, subject, text, html) {
        let mailOptions = {
            from: emailConfig.MAIL_FROM_ADDRESS,
            to,
            subject,
            text,
            html,
        }

        await this.transport.sendMail(mailOptions)
    }
}

export default new EmailSender()

现在你可以在你的任意路由中实现它了：

router.get('/email', async (req, res) => {
    try {
        await EmailSender.sendMessage(
            'bijaya@bijaya.com',
            'Hello world',
            'test',
            '<h1>Test</h1>'
        )

        return res.status(200).send('Successfully sent email.')
    } catch (exception) {
        return res.status(500).send(exception.message)
    }
})

如何使 nodemailer 在多个模块中可重用？

How to make nodemailer reusable in multiple module?

node.js

express

nodemailer