在Mac的本地主机上尝试使用Node.js和MongoDB实现登录功能
在Mac的本地主机上尝试使用Node.js和MongoDB进行登录功能的实现。
因为想要创建Web服务，所以将在本地主机上尝试登录功能。我将使用MongoDB和Node.js。省略了Node.js安装的说明。
从MongoDB的安装到启动
安装前的准备工作
brew tap mongodb/brew
安装
brew install mongodb-community
创建储存空间
sudo mkdir /var/lib/mongodb
生成日志
sudo touch /var/log/mongodb.log
启动
sudo mongod --dbpath /var/lib/mongodb --logpath /var/log/mongodb.log
实现登录功能
首先，我们先安装模块。
npm安装express
npm安装monogodb
我认为以下代码可以实现注册和登录。
const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const MongoClient = require('mongodb').MongoClient;
const http = require('http').Server(app);
const url = 'mongodb://localhost:27017';
const dbName = 'myMongo';
const connectOption = {
useNewUrlParser: true,
useUnifiedTopology: true,
}
const transactionKururiDownload = async (data, res) => {
let client;
let login = false;
try {
client = await MongoClient.connect(url, connectOption);
const db = client.db(dbName);
const collection = db.collection('account');
await collection.find({}).toArray( (err, docs) => {
for (const doc of docs) {
if (doc.mail == data.mail) {
if (doc.password == data.password) {
login = true;
res.sendFile(__dirname + "/index.html");
}
}
}
if (!login) {
res.send("login error");
}
});
} catch (error) {
console.log(error);
} finally {
// client.close();
}
};
const transactionKururiInsert = async (data, res) => {
let client;
data = Object.assign(data, {date: new Date() });
try {
client = await MongoClient.connect(url, connectOption);
const db = client.db(dbName);
const collection = db.collection('account');
const a = await collection.updateOne({mail:data.mail, password:data.password, name:data.name, date:data.date}, {$set:data}, true );
if (a.result.n == 0) {
await collection.insertOne(data);
}
} catch (error) {
console.log(error);
} finally {
client.close();
}
};
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.get('/', (req, res) => {
res.sendFile(__dirname + "/login.html");
});
app.get('/signup', (req, res) => {
res.sendFile(__dirname + "/signup.html");
});
app.post('/signup', async (req, res) => {
let client;
let exist = false;
try {
client = await MongoClient.connect(url, connectOption);
const db = client.db(dbName);
const collection = db.collection('account');
await collection.find({}).toArray( (err, docs) => {
console.log(docs);
for (const doc of docs) {
if (doc.mail == req.body.mail){
console.log(req.body.mail);
exist = true;
}
}
let user = {mail:"", name:"", password:""};
if (!exist && req.body.mail != "" && req.body.password != "") {
user["mail"] = req.body.mail;
user["password"] = req.body.password;
user["name"] = user.mail.substr(0, user.mail.indexOf("@"));
transactionKururiInsert(user, res);
res.sendFile(__dirname + "/signuped.html");
} else {
res.sendFile(__dirname + "/signuperror.html");
}
});
} catch (error) {
console.log(error);
} finally {
// client.close();
}
});
app.post('/', (req, res) => {
let user = {
mail:"", name:"", password:""
};
user["mail"] = req.body.mail;
user["password"] = req.body.password;
user["name"] = user.mail.substr(0, user.mail.indexOf("@"));
transactionKururiDownload(user, res);
});
http.listen(8080, () => {
console.log('listening on :8080');
});
<html>
<head>
<title>login</title>
</head>
<body style="width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center;">
<form action="" method="post">
<h1>login</h1>
<table>
<tr>
<td>mail</td>
<td><input id="mail" name="mail" type="mail" /></td>
</tr>
<tr>
<td>password</td>
<td><input id="password" name="password" type="password" /></td>
</tr>
</table>
<button>send</button>
</form>
<br>
<a href="signup">sign up</a>
</body>
</html>
<html>
<head>
<title>signup</title>
</head>
<body style="width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center;">
<form action="" method="post">
<h1>signup</h1>
<table>
<tr>
<td>mail</td>
<td><input id="mail" name="mail" type="mail" /></td>
</tr>
<tr>
<td>password</td>
<td><input id="password" name="password" type="password" /></td>
</tr>
</table>
<button>send</button>
</form>
</body>
</html>
<!Doctype html>
<html>
<head>
<title>logined</title>
</head>
<body style="width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center;">
<h1>Success signup!</h1>
<a href="/">please login</a>
</body>
</html>
<!Doctype html>
<html>
<head>
<title>error</title>
</head>
<body style="width: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center;">
<h1>signup error</h1>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title>test</title>
</head>
<body>
login success!
</body>
</html>