使用 node js 和 mongodb 的 HTML 表单认证答案

【问题标题】：HTML form authentication using node js and mongodb使用 node js 和 mongodb 的 HTML 表单认证
【发布时间】：2022-01-08 23:15:40
【问题描述】：

我有一个快速服务器，想建立一个带有身份验证表单的网站。我正在使用 mongodb，一切都很顺利。但是当我来到最后一部分，即验证用户并将其重定向到他们各自的 URL 时，我遇到了问题：它告诉用户即使输入正确的凭据也无效。这是我的 HTML：

<!DOCTYPE html>
<html>
<head>
    <title> PAL - Play and Learn | Login & Signup page </title>
</head>
<body>
<div class="container" id="container">
    <div class="form-container sign-up-container">
        <form method="post" action="signup">
            <h1>Create Account</h1><br>
            <span>or use your email for registration</span><br>
            <input type="text" id="signupUsername" placeholder="Username" />
            <input type="email" id="signupEmail" placeholder="Email" />
            <input type="password" id="signupPassword" placeholder="Password" />
            <input type="number" id="signupAge" placeholder="Age" />
            <label for="">Date of Birth</label>
            <input type="date" id="signupDOB">
            <button id="signupCont" type="submit">Sign Up</button>
        </form>
    </div>
    <div class="form-container sign-in-container">
        <form method="post" action="login">
            <h1>Sign in</h1><br>
            <span>or use your account</span><br>
            <input type="text" id="loginUsername" name="loginUser" placeholder="Username" />
            <input type="password" id="loginPassword" name="loginPass" placeholder="Password" />
            <button id="loginCont" type="submit">Sign In</button>
        </form>
    </div>
    <div class="overlay-container">
        <div class="overlay">
            <div class="overlay-panel overlay-left">
                <h1>Welcome Back!</h1>
                <p>Already created an account? Click here to login to your account!</p>
                <button class="ghost" id="signIn">Sign In</button>
            </div>
            <div class="overlay-panel overlay-right">
                <h1>Hello, Friend!</h1>
                <p>Don't have an account? Don't worry! Click here to create one.</p>
                <button class="ghost" id="signUp">Sign Up</button>
            </div>
        </div>
    </div>
</div>
</body>
<style>
@import url('https://fonts.googleapis.com/css?family=Quicksand:400,800');

* {
    box-sizing: border-box;
    font-family: 'Quicksand', sans-serif;
}

body {
    background: #f6f5f7;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
    margin: -20px 0 50px;
}

h1 {
    font-weight: bold;
    margin: 0;
}

h2 {
    text-align: center;
}

p {
    font-size: 14px;
    font-weight: 100;
    line-height: 20px;
    letter-spacing: 0.5px;
    margin: 20px 0 30px;
}

span {
    font-size: 12px;
}

a {
    color: #333;
    font-size: 14px;
    text-decoration: none;
    margin: 15px 0;
}

button {
    border-radius: 20px;
    border: 1px solid #FF4B2B;
    background-color: #FF4B2B;
    color: #FFFFFF;
    font-size: 12px;
    font-weight: bold;
    padding: 12px 45px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 80ms ease-in;
}

button:active {
    transform: scale(0.95);
}

button:focus {
    outline: none;
}

button.ghost {
    background-color: transparent;
    border-color: #FFFFFF;
}

form {
    background-color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 50px;
    height: 100%;
    text-align: center;
}

input {
    background-color: #eee;
    border: none;
    padding: 12px 15px;
    margin: 8px 0;
    width: 100%;
}

.container {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 
            0 10px 10px rgba(0,0,0,0.22);
    position: relative;
    overflow: hidden;
    width: 768px;
    max-width: 100%;
    min-height: 480px;
}

.form-container {
    position: absolute;
    top: 0;
    height: 100%;
    transition: all 0.6s ease-in-out;
}

.sign-in-container {
    left: 0;
    width: 50%;
    z-index: 2;
}

.container.right-panel-active .sign-in-container {
    transform: translateX(100%);
}

.sign-up-container {
    left: 0;
    width: 50%;
    opacity: 0;
    z-index: 1;
}

.container.right-panel-active .sign-up-container {
    transform: translateX(100%);
    opacity: 1;
    z-index: 5;
    animation: show 0.6s;
}

@keyframes show {
    0%, 49.99% {
        opacity: 0;
        z-index: 1;
    }
    
    50%, 100% {
        opacity: 1;
        z-index: 5;
    }
}

.overlay-container {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    overflow: hidden;
    transition: transform 0.6s ease-in-out;
    z-index: 100;
}

.container.right-panel-active .overlay-container{
    transform: translateX(-100%);
}

.overlay {
    background: #FF416C;
    background: -webkit-linear-gradient(to right, #FF4B2B, #FF416C);
    background: linear-gradient(to right, #FF4B2B, #FF416C);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 0 0;
    color: #FFFFFF;
    position: relative;
    left: -100%;
    height: 100%;
    width: 200%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.container.right-panel-active .overlay {
    transform: translateX(50%);
}

.overlay-panel {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 40px;
    text-align: center;
    top: 0;
    height: 100%;
    width: 50%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.overlay-left {
    transform: translateX(-20%);
}

.container.right-panel-active .overlay-left {
    transform: translateX(0);
}

.overlay-right {
    right: 0;
    transform: translateX(0);
}

.container.right-panel-active .overlay-right {
    transform: translateX(20%);
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
const container = document.getElementById('container');
const signUpButton = document.getElementById('signUp');
const signInButton = document.getElementById('signIn');

const loginUser = document.getElementById("loginUsername");
const loginPass = document.getElementById("loginPassword");
const loginCont = document.getElementById("loginCont");

const signupUser = document.getElementById("signupUsername");
const signupEmail = document.getElementById("signupEmail");
const signupPass = document.getElementById("signupPassword");
const signupAge = document.getElementById("signupAge");
const signupDOB = document.getElementById("signupDOB");
const signupCont = document.getElementById("signupCont");

signUpButton.addEventListener('click', () => {
    container.classList.add("right-panel-active");
});

signInButton.addEventListener('click', () => {
    container.classList.remove("right-panel-active");
});

loginCont.addEventListener("click", () => {
    
});

signupCont.addEventListener("click", () => {
    
});
</script>
</html>

这是我的服务器端代码：

var express = require('express');
var app = express();
var fs = require('fs');
var MongoClient = require('mongodb').MongoClient;
var bodyParser = require('body-parser')
app. use( bodyParser.json() );
app.use(bodyParser.urlencoded({ extended: true })); 

var mongo_profiles_url = 'mongodb+srv://signup:vesh2021@raspberry-target.7qt1j.mongodb.net/user-profiles?retryWrites=true&w=majority';

async function createDocument(db, db_name, clction, obj) {
  var dbo = db.db(db_name);
  dbo.collection(clction).insertOne(obj, function(err, res) {
    if (err) throw err;
    console.log("1 document inserted");
    db.close();
  });
}

app.get('/', function (req, res) {
  fs.readFile('./login-signup.html', function(err, data) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.end(data)
  });
});

app.post('/login', function (req, res) {
  var inuser = req.body.loginUser;
      inpass = req.body.loginPass;

  var myobj = { "user": inuser, "pass": inpass };
  console.log(`Login credentials: ` + JSON.stringify(myobj));

  MongoClient.connect(mongo_profiles_url).then(function(db, err) {
    if (err) throw err;
    
    var dbo = db.db("PAL");
    ob = dbo.collection("user-profiles").find(myobj).toArray();

    console.log(ob);

    if (ob.length > 0) {
      fs.readFile('./home.html', function(err, data) {
        res.writeHead(200, {'Content-Type': 'text/html'});
        res.end(data)
      });
    } else {
      console.log("Incorrect credentials given.")
    }
  });
});

app.listen(1000, function () {
    console.log("Server listening to http://localhost:1000");
});

有关详细信息，我已在同一个文件夹中创建了这两个文件。

这是我的 VSCode 控制台的快照：

我发现 mongodb 给出的响应是一个承诺，并且没有被转换为数组，因此我可以正确地进行身份验证。我用谷歌搜索了很多关于这个的，成功的机会是 0%。希望有人能帮忙。

提前致谢！

【问题讨论】：

您确定已连接到数据库吗？您是否尝试过从那里进行控制台记录？
您通过数据库中的查找操作查找返回的 Promise 仍处于挂起状态，因此当您比较 `ob.length > 0' 时，它的评估结果为 false，因此 else 始终执行。看看如何处理asynchronous javascript

标签： html node.js mongodb express

【解决方案1】：

您正在通过 find 从 MongoDB 数据库的集合中检索数据，当您这样做时，您需要使用回调函数或 Promise 处理程序。

您需要使用以下语句添加一个 Promise 处理程序 (.then) 或一个回调函数： ob = dbo.collection("user-profiles").find(myobj).toArray();

与使用 mongodb 连接语句的方式相同： MongoClient.connect(mongo_profiles_url).then(function(db, err) {

以下是官网的一些信息：

可以通过以下两种方式之一执行猫鼬查询。首先，如果你传入一个回调函数，Mongoose 将异步执行查询并将结果传递给回调。查询也有 .then() 函数，因此可以用作承诺。

希望这可以清楚并解决您遇到的问题。

【讨论】：