使用 Node 和 Express 发送邮件时出错
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【中文标题】使用 Node 和 Express 发送邮件时出错【英文标题】：Error while sending mail with Node and Express 【发布时间】：2021-01-09 08:58:12 【问题描述】：我正在尝试使用 nodemailer 在提交 html 表单时发送邮件。但是当我按下提交按钮时，它会显示这个错误......
TypeError: sendMail is not a function
at C:\Users\user\Desktop\project\Internship designs\notchup\server.js:20:3
at Layer.handle [as handle_request] (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\route.js:137:13)
at Route.dispatch (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\index.js:281:22
at Function.process_params (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\index.js:335:12)
at next (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\index.js:275:10)
at jsonParser (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\body-parser\lib\types\json.js:101:7)
at Layer.handle [as handle_request] (C:\Users\user\Desktop\project\Internship designs\notchup\node_modules\express\lib\router\layer.js:95:5)
我只收到一封没有任何主题和正文的空白邮件。 我尝试更改函数名称，以免它与内置函数冲突。我还尝试将其数据类型从“const”更改为“function”。但这无济于事。我该如何解决这个问题？
index.html
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<form class="">
<input type="text" id="subject" placeholder="Subject"><br>
<input type="email" id="email" placeholder="Email"><br>
<textarea name="text" id="text" rows="10" cols="30"></textarea><br>
<input type="submit" value="Submit">
</form>
<!-- JQuery -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- CUSTOM script -->
<script>
$('form').on('submit', (e) =>
e.preventDefault();
const email = $('#email').val().trim();
const subject = $('#subject').val().trim();
const text = $('#text').val().trim();
const data =
email,
subject,
text
;
$.post('/email',data, function()
console.log('Server received our data');
);
);
</script>
</body>
</html>
server.js
const express = require('express');
const sendMail = require('./send-mail');
const app = express();
const path = require('path');
const PORT = 8080;
// Data Parsing
app.use(express.urlencoded(
extended: false
));
app.use(express.json());
app.post('/email', (req, res) =>
// TODO
// send email here
const subject, email, text = req.body;
console.log('Data: ', req.body);
sendMail(email, subject, text, function(err, data)
if (err)
res.status(500).json( message: 'Internal Error' );
else
res.json( message: 'Email sent!!!' );
);
res.json( message: 'Message received!!!' )
);
app.get('/', (req, res) =>
res.sendFile(path.join(__dirname, 'views', 'index.html'));
);
app.listen(PORT, () => console.log('Server is starting on PORT, ', 8080));
发送邮件.js
var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport(
service: 'gmail',
auth:
user: 'saxena1975sanjeev@gmail.com',
pass: 'my_password'
);
const sendMail = (email, subject, text) =>
const mailOptions =
from: email,
to: 'saxena1975sanjeev@gmail.com',
subject: subject,
text: text
;
transporter.sendMail(mailOptions, function(error, info)
if(error)
console.log(error);
else
console.log('Email sent: ' + info.response);
);
module.exports = sendMail();
【问题讨论】：
【参考方案1】：错误消息说sendMail 不是函数。因此，您需要查看并确定它是什么。
你在这里给它赋值：
const sendMail = require('./send-mail');
因此查看该文件并查看它是否导出：
module.exports = sendMail();
要为export 设置值，您需要调用 sendMail 并分配其返回值。
其中没有return 语句，所以它返回undefined。
如果要导出sendMail 函数，请导出函数本身。不要附加() 来调用它并获取它的返回值。
【讨论】：
【参考方案2】：您正在导出 sendMail 的返回值而不是函数本身：
module.exports = sendMail();
改成：
module.exports = sendMail;
【讨论】：
【参考方案3】：在 send-mail.js 中，不执行 sendMail 函数，只发送函数的引用。
var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport(
service: 'gmail',
auth:
user: 'saxena1975sanjeev@gmail.com',
pass: 'my_password'
);
const sendMail = (email, subject, text) =>
const mailOptions =
from: email,
to: 'saxena1975sanjeev@gmail.com',
subject: subject,
text: text
;
transporter.sendMail(mailOptions, function(error, info)
if(error)
console.log(error);
else
console.log('Email sent: ' + info.response);
);
module.exports = sendMail; // don't sendMail()
【讨论】：
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