Skip to content
DOSE3

ExpressJS

Express.js, commonly known as Express, is a fast and minimalist web application framework for Node.js. It provides a simple and flexible set of features for building web applications and APIs. Express.js is designed to be unopinionated, allowing developers to structure and organize their applications according to their specific needs.

Structure

  • Directoryprisma/
    • …
  • Directorysrc
  • Directorytest
    • test.ts
  • .env

router

in router file you can get function from controller file and use it to make clean router

import {IRouter , Router} from 'express';
const Main_router : IRouter = Router();
import { create , get} from '../Controller/main.controller';


Main_router.get("/", get)
Main_router.post('/example',create)


export default Main_router ;

controller

//This file to make Controller process you can do anything and export it in function to use in router
import Model from "../model/main.model";
import {Request ,Response} from "express";


export async function get(req:Request,res:Response){
    res.send('welcome to expressTS')
}


export async function create(req:Request,res:Response){
    const {name , age} = req.body;
    const result = await Model.create({
        name:name,
        age:age
    })
    res.send(result)
};

model

//make schema model in mongoose example
import mongoose from "mongoose";
import { user } from "../types/type";


const model = new mongoose.Schema(
    {
        name:{
            type: String,
            required: true
        },
        age:{
            type: Number,
            required: true
        }
    },
    {
        collection: 'model',
    }
)


const Model: mongoose.Model<user> = mongoose.model("model", model)
export default Model

middleware

in middleware floder you can set header use logger check token and many things in this floder and import to use it in index.js file

db

if you use PostgreSQL you will see prisma floder and you can use it to set database

.env

you can change your port and setup your database in .env file

PORT = 8080
DATABASE_URI = '< DATABASE_URL >'
DATABASE_NAME = '< DB_NAME >'

test

test using supertest and vitest together learn more about vitest and supertest

import request from 'supertest'
import { describe, expect, test } from 'vitest'
import app from '../src/index';


describe("Test the root path",async () => {
    const response = await request(app).get("/");


    test("It should response the GET method", () => {
        expect(response.text).toBe("welcome to expressTS");
    });
    test("status should be 200" , async ()=>{
        expect(response.status).toBe(200);
    })
});

logger

🔐Security

security is the topic we concerned about so that we use sample protection there

DDOS protection

this cannot protect all of DDos attack please learn more about security

const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  limit: 100, // Limit each IP to 100 requests per `window` (here, per 15 minutes).
  standardHeaders: 'draft-7', // draft-6: `RateLimit-*` headers; draft-7: combined `RateLimit` header
  legacyHeaders: false, // Disable the `X-RateLimit-*` headers.
  // store: ... , // Use an external store for consistency across multiple server instances.
})

SQL injection protection

  • prisma can help you from SQL injection cuz it dont want to write real SQL script from your code learn more about ORM

cors protection

// in this part from middle ware you can replace your website in * to protect your site from another user
app.use(cors({
    "origin":'*',
    "methods": ['GET','POST','PUT','DELETE']
}));

LICENCE BY DOSE FROM ANOTHER PLANET