Attached code :(compared with the previous with TXT implementation of no difference, just back-end database interface function)
Html:
<! 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 register 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 codeJS part: Express framework, CORS, Nodemailer is also used, and File System, Path module is not required
var MongoClient = require("mongodb").MongoClient;//mongoDb module is introduced
var mongoDB = "mongodb://localhost:27017/";// Initialize the address
const express = require("express"); // Introduce the Express framework.
const url = require("url");
const cors = require("cors"); // Introduce cORS module (solve cross-domain problems)
const app = express();
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)
.query.split("&") [0]
.split("=") [1]; // Save the data from the front end
let query = url.parse(req.url).query.split("&");
MongoClient.connect(// Connect to the database
mongoDB,
{
useNewUrlParser: true
},
function(err, db) {
if (err) {
throw err;
}
console.log("Connection successful!");
var dball = db.db("UserList");
// Query the mailbox
dball
.collection("allUser")
.find({
email: search
})
.toArray(function(err, result) {
if (err) {
console.log(err);
return;
}
function test() {// Apply promise execution, return true if the user is found, error if the user is found
return new Promise((resolve, reject) = > {// If the user's mailbox does not exist and the verification code is correct, an error object is thrown otherwise
if(! result.length && query[2].split("=") [1] === count) {
resolve({
hasUser: false
});
// Store the data to the database
dball.collection("allUser").insert(
[
{
email: query[0].split("=") [1].password: query[1].split("=") [1]}],function(err, result) {
if (err) {
console.log("Error:" + err);
return; }}); }else {// Throw an error object to the front end instead
reject({
hasUser: true}); }}); } test() .then(data= > {
console.log(data);
res.send(data);
})
.catch(err= > {
console.log(err); res.send(err); }); }); }); });// Login interface
app.get("/index/login".(req, res) = > {
// Save the data from the front end
let query = url.parse(req.url).query.split("&");
MongoClient.connect(
mongoDB,
{
useNewUrlParser: true
},
function(err, db) {
if (err) {
throw err;
}
console.log("Connection successful!");
var dball = db.db("UserList");
// Check whether the user exists
dball
.collection("allUser")
.find({
email: query[0].split("=") [1]
})
.toArray(function(err, result) {
if (err) {
console.log(err);
return;
}
function test() {// If the user's mailbox and password match, an error object is thrown otherwise
return new Promise((resolve, reject) = > {
if (
result.length &&
result[0].password === query[1].split("=") [1]
) {
resolve({
isUser: true
});
} else {
reject({
isUser: false}); }}); } test() .then(data= > {
console.log(data);
res.send(data);
})
.catch(err= > {
console.log(err); res.send(err); }); }); }); });// 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
res.send(count);
});
// Listen to the service
app.listen(1024.() = > {
console.log("Server Start~");
});
Copy the codeThe mailbox js file (send-.js)
const nodemailer = require("nodemailer");
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: function(mail, content) {
mailOptions = {
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); }); }};module.exports = obj;
Copy the code