Student Activity

Student Activity (30-min)

Activity: Building a Basic Express Application

Step-by-Step Procedure:

1. Step 1: Initialize an Express Project:

   • Create a new folder for the project:

     bash코드 복사mkdir express-app
     cd express-app
     npm init -y
     npm install express

2. Step 2: Set Up the Application:

   • Create a file app.js and add the following:

     javascript코드 복사const express = require('express');
     const app = express();
     
     // Middleware to log requests
     app.use((req, res, next) => {
         console.log(`${req.method} ${req.url}`);
         next();
     });
     
     // Define routes
     app.get('/', (req, res) => res.send('Welcome to the Home Page'));
     app.get('/about', (req, res) => res.send('About Us'));
     app.post('/data', (req, res) => res.send('Data received'));
     
     // Start the server
     const PORT = 3000;
     app.listen(PORT, () => {
         console.log(`Server running on http://localhost:${PORT}`);
     });

3. Step 3: Test the Application:

   • Start the server:

     bash코드 복사node app.js

   • Use Postman or a browser to test:

     • GET http://localhost:3000/

     • GET http://localhost:3000/about

     • POST http://localhost:3000/data

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