Attached code:
HTML section (Jq required)
<! DOCTYPEhtml>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="Width = device - width, initial - scale = 1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<script src="./jquery.js"></script>
<style>
* {
margin: 0;
padding: 0;
}
div:nth-child(2) {
display: none;
}
input {
display: block;
height: 40px;
width: 200px;
margin: 20px auto;
}
button:not(#email) {
display: block;
height: 30px;
width: 70px;
background: lightcoral;
border: none;
margin: 0 auto;
}
#email {
display: block;
height: 30px;
width: 100px;
margin: 0 auto;
}
ul {
height: 50px;
width: 200px;
background: lightblue;
margin: 0 auto;
list-style: none;
}
li {
height: 50px;
width: 100px;
float: left;
text-align: center;
line-height: 50px;
}
li:hover {
background: lightgreen;
cursor: pointer;
}
</style>
</head>
<body>
<ul>
<li id="regChange">registered</li>
<li id="loginChange">The login</li>
</ul>
<div id="reg">
<input type="text" placeholder="Email" id="user" />
<input type="text" placeholder="Password" id="psd" />
<input type="text" placeholder="Verification code" id="sendmail" />
<button id="email">Send verification code</button> <button id="btn">registered</button>
</div>
<div id="login">
<input type="text" placeholder="Username" id="loguser" />
<input type="text" placeholder="Password" id="logpsd" />
<button id="logbtn">The login</button>
</div>
<script>
// Add listening events
btn.addEventListener("click", clickHandler);
logbtn.addEventListener("click", clickHandler);
email.addEventListener("click", sendHandler);
regChange.addEventListener("click", changeHandler);
loginChange.addEventListener("click", changeHandler);
function clickHandler(e) {
if (this.textContent === "Registered") {
// Jump if empty
if(! user.value || ! psd.value || ! sendmail.value) { alert("Can't be empty");
return;
}
// Click register to send email number, password, verification code to the background
$.get(
`http://localhost:1024/index/reg? user=${user.value}&psd=${ psd.value }&mail=${sendmail.value}`.function(res) {
If hasUser is true, the user name already exists. Otherwise, the user is successfully registered
if (res.hasUser) {
alert("Registration failed");
return;
} else {
alert("Registration successful ~");
}
// Hide the registration and display the login after success
reg.style.display = "none";
login.style.display = "block"; }); }else if (this.textContent === "Login") {
// Same registration, cannot be empty
if(! loguser.value || ! logpsd.value) { alert("Can't be empty");
return;
}
// Click login to send the email number and password to the background
$.get(
`http://localhost:1024/index/login? user=${loguser.value}&psd=${ logpsd.value }`.function(res) {
// If isUser is true, the object returned by the background is correct, and jump to the welcome page, otherwise failure
if (res.isUser) {
alert("Login successful");
location.href = "./welcome.html";
} else {
alert("Incorrect username or password");
return; }}); }}function sendHandler(e) {
// Click to obtain the verification code and send it to the back end for comparison
$.get(`http://localhost:1024/index/sendmail?${user.value}`);
}
function changeHandler(e) {
// Click register login switch above
if (e.target.textContent === "Registered") {
reg.style.display = "block";
login.style.display = "none";
} else {
reg.style.display = "none";
login.style.display = "block"; }}</script>
</body>
</html>
Copy the codeNode background: Third-party modules to be introduced include: Express framework, CORS, NodeMailer,
const express = require('express');// Introduce the Express framework.
const url = require('url');
const path = require('path');
const fs = require('fs');
const cors = require('cors');// Introduce cORS module (solve cross-domain problems)
const app = express();
// const bodyparser = require('body-parser');
const sendMail = require('./send');// This module is the mail module (found in my third Node article).
app.use(cors());
// The following header is similar to the HTTP request (another article writes about HTTP requests, which are also registered login)
app.all("*".function (req, res, next) {
* indicates that any domain name is allowed to cross domains
res.header("Access-Control-Allow-Origin"."*");
res.header("Access-Control-Allow-Headers"."content-type");// The allowed header type
res.header("Access-Control-Allow-Methods"."DELETE,PUT,POST,GET,OPTIONS");// The type of requests that are allowed across domains
next();// Whether to continue down
})
// Register the interface
var count = ' ';// Create a null character to store the verification code, which can be called globally
app.get('/index/reg'.(req, res) = > {
let search = url.parse(req.url).search;// Save the data from the front end
files = path.join(__dirname, './user.txt');// Use a TXT to record the user name and password
fs.readFile(files, 'utf8'.(err, data) = > {
// Read the TXT file to determine whether there is a user name, and verify the verification code
if (data.indexOf(search.split('&') [0= = = -])1 && search.split('&') [2].split('=') [1] === count) {
fs.appendFile(files, search.split('&') [0] + '&' + search.split('&') [1]);If hasUser is true, the user already exists.
res.send({
hasUser: false
});
} else {
// Return an object to the front end if the condition is not met
res.send({
hasUser: true}); }}); });// Login interface
app.get('/index/login'.(req, res) = > {
let search = url.parse(req.url).search;// Save the data from the front end
files = path.join(__dirname, './user.txt');
// Read the TXT file and check whether there is a user name and password
fs.readFile(files, 'utf8'.(err, data) = > {
If isUser is true, the user name does not match the password.
if (data.indexOf(search) === -1) {
res.send({
isUser: false
});
} else {
res.send({
isUser: true}); }}); });// Mailbox authentication interface
app.get('/index/sendmail'.(req, res) = > {
count = ' ';// Initialize the captcha container
let Email = url.parse(req.url).query;// Get the mailbox number from the front end
for (let i = 0; i < 4; i++) {
count += Math.floor(Math.random() * 10);// Generate 4 random numbers
}
sendMail.send(Email, count);// Call the mail sending module (pass in the registered mailbox, verification code)
res.send(count);
});
// Listen to the service
app.listen(1024.() = > {
console.log('Server Start~');
});
Copy the codeAttach the module for sending emails (also in my previous article)
// Import modules
const nodemailer = require("nodemailer");
// Create an object
let obj = {
transporter: nodemailer.createTransport({
service: "qq".// Operator qq mailbox netease //
port: 465.secure: true.auth: {
user: "**********@qq.com".// Sender's email address
pass: "* * * * * * * * * * * * * * *" // POP3 authorization code}}),// Send a parameter (email address, content)
send: function(mail, content) {
mailOptions = {
// Sender's email address
from: '"Hello World~" <***********@qq.com>'.to: mail,
subject: content,
text: content,
html: "<h1>" + content + "</h1>"
};
this.transporter.sendMail(mailOptions, (error, info) = > {
if (error) {
return console.log(error);
}
console.log("Message sent: %s", info.messageId); }); }};// Throw an object to receive
module.exports = obj;
Copy the code