☕ Teaverse Node.js + AWS Snippets

A professional and production-ready snippet collection for building Node.js applications using Express.js, AWS SDK, S3, DynamoDB, Multer, and EJS.
Designed to speed up development and reduce repetitive coding when building full-stack or backend applications integrated with AWS cloud services.

Instructions - Step 1

npm init -y; npm i ejs nodemon express; npm install aws-sdk dotenv multer; npm install uuid
Add "start": "nodemon index.js" to your package.json
Create index.js in the root directory
Create a .env with tea-env (remove spaces and edit table name)
In index.js run snippets in order: tea-1 → tea-5, then tea-8 (edit PORT to ${PORT})
Create index.ejs in views/index.ejs, add HTML:5 structure
Inside the <body> tag, insert snippets tea-form-save and tea-form-delete
Add tea-6 → tea-7 edit save and edit id delete

Instructions - Step 2 (Deploy)

ssh -i "key.pem" ubuntu@54.251.186.201
Upload LOCAL -> Ubuntu(delete node-modules): scp -i "folder\key.pem" -r "folder_code" ubuntu@54.251.186.201:/home/ubuntu/
Install dependencies: cd /home/ubuntu/<Folder_Project> and npm install
Run by PM2: pm2 start index.js
sudo env PATH=PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup systemd -u ubuntu --hp /home/ubuntu
pm2 save

📦 Snippet Overview

Prefix	Title	Description
`tea-1`	Import-Libraries-1	Import core libraries (Express, AWS SDK, Multer, etc.)
`tea-2`	AWS-Configuration-2	Configure AWS SDK, S3, and DynamoDB
`tea-3`	Multer-Configuration-3	Setup Multer to handle image uploads with type filtering
`tea-4`	Express-App-Initialization	Initialize Express app and setup EJS as the view engine
`tea-5`	Route-Render-Homepage-5	Route to render homepage using data from DynamoDB
`tea-6`	Route-Upload-Save-6	Route to upload image to S3 and save data to DynamoDB
`tea-7`	Route-Delete-7	Route to delete selected employees from DynamoDB
`tea-8`	Start-Server-8	Start the Express server
`tea-form-save`	Form-Template-Tea-Form-Save	HTML form template to add a new employee
`tea-form-delete`	Form-Template-Tea-Form-Delete	HTML form template to delete selected employees
`tea-env`	Environment-Config-Tea-Env	Sample `.env` file for AWS setup
`tea-ec2-deploy`	Deploy Node.js App to EC2	Instructions to deploy your app to AWS EC2 using SSH + PM2

💡 Full Example Code

🔹 Import Libraries

const express = require('express');
const AWS = require('aws-sdk');
const path = require('path');
const multer = require('multer');
require('dotenv').config();
const { v4: uuidv4 } = require('uuid');

🔹 AWS Configuration

AWS.config.update({
  accessKeyId: process.env.AWS_ACCESS_KEY_ID,
  secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
  region: process.env.AWS_REGION
});

const s3 = new AWS.S3();
const dynamo = new AWS.DynamoDB.DocumentClient();
const bucketName = process.env.AWS_S3_BUCKET_NAME;
const tableName = process.env.DYNAMO_TABLE_NAME;

🔹 Multer Configuration

const storage = multer.memoryStorage();

function checkFileType(file, cb) {
  const fileTypes = /jpeg|jpg|png|gif/;
  const extname = fileTypes.test(path.extname(file.originalname).toLowerCase());
  const mimetype = fileTypes.test(file.mimetype);
  if (extname && mimetype) return cb(null, true);
  cb('Error: Images Only');
}

const upload = multer({
  storage,
  limits: { fileSize: 2 * 1024 * 1024 },
  fileFilter(req, file, cb) {
    checkFileType(file, cb);
  }
});

🔹 Express App Initialization

const app = express();
const PORT = 3000;

app.use(express.json({ extended: false }));
app.use(express.static('/views'));

app.set('view engine', 'ejs');
app.set('views', './views');

🔹 Route: Render Homepage

app.get('/', async (req, res) => {
  try {
    const params = { TableName: tableName };
    const data = await dynamo.scan(params).promise();
    res.render("index.ejs", { data: data.Items });
  } catch (error) {
    console.log(error);
    res.status(500).send("Lỗi server");
  }
});

🔹 Route: Save Employee + Upload Image to S3

app.post('/save', upload.single('hinhanh'), async (req, res) => {
  try {
    const manhansu = Number(req.body.manhansu);
    const hoten = req.body.hoten;
    const namsinh = Number(req.body.namsinh);
    const phongban = req.body.phongban;

    const hinhanh = req.file?.originalname.split('.');
    const fileType = hinhanh[hinhanh.length - 1];
    const filePath = `${manhansu}_${Date.now().toString()}.${fileType}`;

    const paramsS3 = {
      Bucket: bucketName,
      Key: filePath,
      Body: req.file.buffer,
      ContentType: req.file.mimetype
    };

    s3.upload(paramsS3, async (error, data) => {
      if (error) {
        console.log(error);
        return res.status(500).send("Lỗi Server");
      }

      const paramsDynamo = {
        TableName: tableName,
        Item: { manhansu, hoten, namsinh, phongban, hinhanh: data.Location }
      };

      await dynamo.put(paramsDynamo).promise();
      return res.redirect("/");
    });

    console.log(filePath);
  } catch (error) {
    console.log(error);
    res.status(500).send("Lỗi server");
  }
});

🔹 Route: Delete Selected Employees

app.post('/delete', upload.fields([]), (req, res) => {
  const selectedbox = Object.keys(req.body);

  if (!selectedbox || selectedbox.length <= 0) {
    return res.redirect('/');
  }

  try {
    function onDeleteItem(length) {
      const params = {
        TableName: tableName,
        Key: { manhansu: Number(selectedbox[length]) },
      };

      dynamo.delete(params, (err) => {
        if (err) {
          console.error('Lỗi xoá dữ liệu: ', err);
          return res.status(500).json({ message: 'Internal Server Error' });
        } else {
          if (length > 0) {
            onDeleteItem(length - 1);
          } else {
            return res.redirect('/');
          }
        }
      });
    }

    onDeleteItem(selectedbox.length - 1);
  } catch (error) {
    console.error('Lỗi server: ', error);
    return res.status(500).json({ message: 'Internal Server Error' });
  }
});

🔹 Start Server

app.listen(PORT, () => {
  console.log(`Server đang chạy tại PORT: ${PORT}`);
});

🔹 .env Configuration

AWS_REGION=ap-southeast-1
AWS_ACCESS_KEY_ID=YOUR_ACCESS_KEY
AWS_SECRET_ACCESS_KEY=YOUR_SECRET_KEY
DYNAMO_TABLE_NAME=nhansu1
AWS_S3_BUCKET_NAME=bucketnguyenquan

🔹 Deploy to EC2 (PM2)

# SSH vào EC2
ssh -i "your-key.pem" ubuntu@<PUBLIC_IPV4_EC2>

# Cập nhật hệ thống
sudo apt update && sudo apt upgrade -y

# Cài Node.js 18
curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install -y nodejs

# Cài PM2
sudo npm install -g pm2

# Upload code (xóa node_modules trước)
scp -i "your-key.pem" -r "your-project" ubuntu@<PUBLIC_IPV4_EC2>:/home/ubuntu/

# Vào thư mục & cài dependencies
cd /home/ubuntu/your-project
npm install

# Chạy bằng PM2
pm2 start index.js
sudo env PATH=$PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup systemd -u ubuntu --hp /home/ubuntu
pm2 save

# Kiểm tra
pm2 list

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