[我在React JS应用程序中使用Nodemailer来获取联系表单数据并将其发送到我的邮件,在我的本地计算机上一切正常,我将应用程序部署到heroku,并且一个测试我的应用程序的朋友注意到了我的表单未提交,当然是已提交并已发送到我的消息框。
清除历史记录和缓存后,我在Chrome上打开了我的应用,并在控制台中注意到此错误:
xhr.js:166 OPTIONS http://localhost:5000/send net::ERR_CONNECTION_REFUSED
createError.js:17 Uncaught (in promise) Error: Network Error
at e.exports (createError.js:17)
at XMLHttpRequest.p.onerror (xhr.js:80)
这是Firefox上的错误消息:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:5000/send. (Reason: CORS request did not succeed).
[请帮我解决这个问题,我将不胜感激,我已经花了几天的时间,查看了资源以及与Stackoverflow相关的所有问题,但是这些问题在我的情况下都无效。
这是我的Axios提取函数调用:
const handleFormSubmit = e => {
const name = nameRef.current.value, email = emailRef.current.value,
message = messageRef.current.value;
e.preventDefault();
axios({
url: 'http://localhost:5000/send',
method: "POST",
data: {
name,
email,
message
}
}).then(({data}) => {
if (data.msg === 'success') {
createNotification('Message received, thank you.');
setClearForm(true);
setTimeout(() => {setClearForm(false)})
} else if (data.msg === 'fail') {
console.log(data);
createNotification(`Hmm... Something went wrong!`);
}
})
};
这是我的服务器代码段:
const express = require('express');
const cors = require('cors');
const path = require('path');
const nodeMailer = require('nodemailer');
const logger = require('morgan');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
if (process.env.NODE_ENV !== 'production') require('dotenv').config();
const app = express();
const port = process.env.PORT || 5000;
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(cors());
app.get('http://localhost:5000/send', function (req, res, next) {
res.json({msg: 'This is CORS-enabled for all origins!'})
});
if (process.env.NODE_ENV === 'production') {
app.use(express.static(path.join(__dirname, 'client/build')));
app.get('*', function (req, res) {
res.sendFile(path.join(__dirname, 'client/build', 'index.html'))
})
}
app.listen(port, err => {
if (err) throw err;
console.log(`Server running on port ${port}`)
});
app.post('/send', (req, res) => {
let name = req.body.name;
let email = req.body.email;
let subject = `Message from ${name}, through CodeSurge`;
let message = req.body.message;
let content = `name: ${name} \n email: ${email} \n message: ${message} `;
let transporter = nodeMailer.createTransport({
host: 'smtp.gmail.com',
port: 465,
secure: true,
auth: {
user: process.env.USER,
pass: process.env.PASS
}
});
let mail = {
from: name,
to: '[email protected]',
subject: subject,
text: content
};
transporter.sendMail(mail, (err, data) => {
if (err) {
console.log(err);
res.json({
msg: 'fail',
err
})
} else {
res.json({
msg: 'success'
})
}
});
});
[如果需要,这是我在Heroku上的应用地址:CodeSurge
我肯定会感谢每个人的专业知识和知识,因为我已经在这里呆了几天了,试图自己解决这个问题。
问题是您尝试向本地服务器(http://localhost:5000/send)发出http请求。相反,如果您使用的是代理,则需要指向实际的服务器,或者是完整URL还是相对路径。
[经过大量查找,对Google代码进行谷歌搜索和重新编辑后,我终于使它工作了,我所做的就是有条件地将url
传递给我的axios
提取请求,如下所示:
// Form submit handler
const handleFormSubmit = e => {
let url;
process.env.NODE_ENV === 'production' ? url = `https://codesurge.herokuapp.com/send`
: url = "http://localhost:5000/send";
const name = nameRef.current.value, email = emailRef.current.value,
message = messageRef.current.value;
e.preventDefault();
axios({
url: url,
method: "POST",
data: {
name,
email,
message
}
}).then(({data}) => {
if (data.msg === 'success') {
createNotification('Message received, thank you.');
setClearForm(true);
} else if (data.msg === 'fail') {
createNotification(`Hmm... Something went wrong!`);
}
})
};
之后,在Config Vars部分的Heroku的“我的应用程序设置”选项卡下添加了我的Gmail用户名和密码,这对我来说很神奇。
NOTE:如果您使用Gmail作为邮件提供商,则必须通过在此处启用此功能来远程访问您的邮件:https://accounts.google.com/b/0/DisplayUnlockCaptcha
感谢所有为此添加输入的人。