Javascript + Ajax + Jquery +Node 模擬實現登入註冊
阿新 • • 發佈:2020-12-24
技術標籤:node.jsnode.jsjavascriptjqueryajax
一:建資料夾,搭建目錄
專案開始前先建好資料夾目錄,如下圖:
強調一點:是什麼樣的檔案型別就放到什麼型別的資料夾中,不要搞混,尤其是在專案當中要特別注意!!!
二:寫靜態頁面
1./register註冊頁面html
<div class="box">
<h1>使用者註冊</h1>
<div class="uname">
<span>使用者名稱:</span ><input type="text" placeholder="請輸入您的使用者名稱" id="username">
</div>
<div class="pwd">
<span>密碼:</span><input type="password" placeholder="請輸入您的密碼" id="password">
</ div>
<div id="register">
<input type="button" value="立即註冊" id="btn">
<a href="./login.html">前往登入</a>
<span id="ts"></span>
</div>
</div>
/register註冊頁面css
* {
margin: 0;
padding: 0;
}
*::selection {
background: none;
}
body {
background: url(../img/register.jpg) no-repeat;
background-size: 100%;
}
.box {
width: 400px;
height: 240px;
border: 2px solid #000;
background-color: #ccc;
opacity: .7;
border-radius: 8px;
margin: 60px auto;
}
h1 {
text-align: center;
margin-bottom: 20px;
}
.box span {
display: inline-block;
width: 70px;
height: 50px;
margin-left: 66px;
}
.uname input,
.pwd input {
width: 200px;
height: 24px;
}
#register {
text-align: center;
}
#register span {
display: block;
margin: 10px auto;
width: 100%;
height: 20px;
font-size: 14px;
}
#register input {
width: 200px;
height: 30px;
background-color: #ff3040;
outline: none;
border: none;
cursor: pointer;
}
#register a {
text-decoration: none;
}
2./login登入頁面html
<div class="box">
<form action="">
<p>歡迎登入</p>
<div class="uname">
<span>使用者名稱:</span><input type="text" placeholder="請輸入您的使用者名稱" id="username">
</div>
<div class="pwd">
<span>密碼:</span><input type="password" placeholder="請輸入您的密碼" id="password">
</div>
<div class="login">
<button>立即登入</button>
<span id="wz"></span>
</div>
<div class="footer">
<a href="register.html" class="left" target="_blank">新使用者註冊</a>
<a href="register.html" class="right" target="_blank">忘記密碼?</a>
</div>
</form>
</div>
/login登入頁面css
* {
margin: 0;
padding: 0;
}
*::selection {
background: none;
}
body {
background: url(../img/login.jpg);
}
.box {
width: 400px;
height: 220px;
border: 2px solid #000;
margin: 200px auto;
text-align: center;
border-radius: 8px;
}
.box p {
font-size: 26px;
font-weight: 700;
color: rgb(0, 0, 0);
margin-bottom: 20px;
}
.uname,
.pwd {
padding-right: 44px;
}
.uname span,
.pwd span {
display: inline-block;
width: 60px;
text-align: right;
}
.uname input,
.pwd input {
width: 200px;
height: 20px;
margin-left: 8px;
margin-bottom: 10px;
}
.login button {
width: 100px;
height: 30px;
background-color: orangered;
border: none;
outline: none;
border-radius: 8px;
cursor: pointer;
}
.login span {
display: block;
margin: 10px auto;
width: 100%;
height: 20px;
font-size: 14px;
}
.footer {
position: relative;
margin-top: 10px;
}
.footer a {
text-decoration: none;
font-size: 14px;
color: black;
}
.footer a:hover {
color: red;
}
.footer .left {
position: absolute;
left: 20px;
}
.footer .right {
position: absolute;
right: 20px;
}
3./index首頁html
<!DOCTYPE html>
<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>首頁</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
background: url(../img/index.jpg) no-repeat;
}
h1 {
text-align: center;
}
</style>
</head>
<body>
<h1>Welcome to my index</h1>
</body>
</html>
4./404頁面html
<!DOCTYPE html>
<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>錯誤</title>
</head>
<body>
<h1>404 Not Found Page</h1>
</body>
</html>
三:寫app.js,搭建node環境
下面展示程式碼:
// 通過http模組建立伺服器,並監聽3000埠
const http = require("http")
const server = http.createServer()
const fs = require("fs")
const url = require("url")
const queryString = require("querystring")
server.on("request", (req, res) => {
// 靜態伺服
const requrl = url.parse(req.url, true)
// 讀取register檔案
if (req.url == "/" || req.url == "/register.html" && req.method == "GET") {
fs.readFile("./register.html", "utf8", (err, data) => {
if (err) {
fs.readFile("./404.html", "utf8", (err, data) => {
res.end(data)
})
} else {
res.setHeader("Content-type", "text/html")
res.end(data)
}
})
// 讀取reg.css
} else if (req.url == "/css/register.css" && req.method == "GET") {
fs.readFile("../css/register.css", "utf8", (err, data) => {
if (err) {
console.log(err)
} else {
res.setHeader("Content-type", "text/css")
res.end(data)
}
})
// 讀取login檔案
} else if (req.url == "/login.html" && req.method == "GET") {
fs.readFile("./login.html", "utf8", (err, data) => {
if (err) {
fs.readFile("./404.html", "utf8", (err, data) => {
res.end(data)
})
} else {
res.setHeader("Content-type", "text/html")
res.end(data)
}
})
// 讀取login.css
} else if (req.url == "/css/login.css" && req.method == "GET") {
fs.readFile("../css/login.css", "utf8", (err, data) => {
if (err) {
console.log(err)
} else {
res.setHeader("Content-type", "text/css")
res.end(data)
}
})
// 讀取index檔案
} else if (req.url == "/index.html" && req.method == "GET") {
fs.readFile("./index.html", "utf8", (err, data) => {
if (err) {
fs.readFile("./404.html", "utf8", (err, data) => {
res.end(data)
})
} else {
res.setHeader("Content-type", "text/html")
res.end(data)
}
})
//讀取jquery檔案
} else if (req.url == "/js/jquery-3.4.0.js" && req.method == "GET") {
fs.readFile("../js/jquery-3.4.0.js", "utf8", (err, data) => {
if (err) {
console.log(err)
} else {
res.end(data)
}
})
//讀取圖片
} else if (req.url == "/img/index.jpg" && req.method == "GET") {
fs.readFile("../img/index.jpg", (err, data) => {
if (err) {
console.log(err)
} else {
res.setHeader("Content-type", "image/jpg")
res.end(data)
}
})
} else if (req.url == "/img/login.jpg" && req.method == "GET") {
fs.readFile("../img/login.jpg", (err, data) => {
if (err) {
console.log(err)
} else {
res.setHeader("Content-type", "image/jpg")
res.end(data)
}
})
} else if (req.url == "/img/register.jpg" && req.method == "GET") {
fs.readFile("../img/register.jpg", (err, data) => {
if (err) {
console.log(err)
} else {
res.setHeader("Content-type", "image/jpg")
res.end(data)
}
})
}
//註冊介面/register
else if (requrl.pathname == '/register' && req.method == 'POST') {
let str = '';
req.on('data', (chunk) => {
// console.log(0)
str += chunk;
})
// console.log(1)
req.on('end', () => {
// console.log(2)
let dataObj = queryString.parse(str);
console.log(dataObj) //物件
fs.readFile('../data/person.json', 'utf8', (err, data) => {
// console.log(3)
// console.log(data)
let obj = JSON.parse(data) //陣列
for (let i = 0; i < obj.length; i++) {
if (obj[i].username == dataObj.username) {
return res.end('3')
}
}
obj.push(dataObj)
fs.writeFile('../data/person.json', JSON.stringify(obj), 'utf8', (err, result) => {
if (err) {
return res.end('2')
}
return res.end('1')
})
})
})
}
//登入介面/login
else if (requrl.pathname == '/login' && req.method == 'GET') {
// console.log(requrl)
// let userInput = queryString.parse(requrl.query)
// console.log(userInput)
// console.log(requrl.query);
fs.readFile('../data/person.json', 'utf8', (err, data) => {
console.log(data)
if (err) {
console.log(1);
} else {
let obj = JSON.parse(data)
// console.log(obj)
for (let i = 0; i < obj.length; i++) {
if (obj[i].username == requrl.query.username && obj[i].password == requrl.query.password) {
return res.end('1')
} else if (obj[i].username == requrl.query.username && obj[i].password != requrl.query.password) {
return res.end('3')
}
}
}
})
}
})
server.listen(3000, () => {
console.log("伺服器已啟動")
})
四:Ajax請求
1./register頁面
<script src="../js/jquery-3.4.0.js"></script>
<script>
$('#btn').on('click', () => {
$.ajax({
url: '/register',
type: 'POST',
data: {
username: $('#username').val(),
password: $('#password').val()
},
success: function (res) {
switch (res) {
case '1':
$('#ts').text('使用者註冊成功');
$('#ts').css('color', 'green');
window.location.href = './login.html';
break;
case '2':
$('#ts').text('使用者註冊失敗');
$('#ts').css('color', 'red');
break;
case '3':
$('#ts').text('該使用者已註冊').fadeOut(2000);
$('#ts').css('color', 'red');
break;
case '4':
$('#ts').text('未知錯誤')
$('#ts').css('color', 'red');
break;
}
}
})
})
</script>
2./login頁面
<script src="../js/jquery-3.4.0.js"></script>
<script>
$('button').on('click', () => {
$.ajax({
url: '/login',
type: 'GET',
data: {
username: $('#username').val(),
password: $('#password').val()
},
success: function (res) {
switch (res) {
case '1':
$('#wz').text('登陸成功')
$('#wz').css('color', 'green');
window.location.href = './index.html'
break;
case '2':
$('#wz').text('登入失敗');
$('#wz').css('color', 'red');
break;
case '3':
$('#wz').text('密碼錯誤');
$('#wz').css('color', 'red');
break;
case '4':
$('#wz').text('未知錯誤');
$('#wz').css('color', 'red');
break;
}
}
})
})
</script>
五:建立json存放資料
六:開啟node執行測試app.js檔案
如果沒有node的可以自行去官網下載安裝包,安裝步驟next->next->…(參考傻瓜式教程)
一般預設為3000埠,程式碼中有說明,node開啟以後在網址中輸入localhost:3000/就可以訪問了,感興趣的同學可以下去試一試,另外程式碼中還有不少需要改進的地方,希望讀者能夠及時指正,一起進步