Express Web Server - Assignment

A simple yet comprehensive Express.js web server demonstrating various routing techniques, including basic routes, dynamic parameters, query strings, conditional routing, regular expressions, and error handling.

Features

• ✅ Basic routing (/, /about)
• ✅ Conditional routing with next() middleware (/foo)
• ✅ Regular expression routes (/user(name)?)
• ✅ Dynamic route parameters (/user/:username)
• ✅ Query string handling (/get)
• ✅ 404 error handling

Prerequisites

• Node.js (v14 or higher)
• npm (Node Package Manager)

Installation

1. Clone the repository:

git clone https://github.com/nhapham03/MyExpressServer.git
cd ExpressServer

2. Install dependencies:

npm install

Running the Server

Start the server with:

npm start

The server will run on port 3000 by default. You can access it at http://localhost:3000

For development with auto-restart on file changes:

npm run dev

Available Routes

1. Root Path

• URL: GET /
• Response: "Hello World"
• Example: http://localhost:3000/

2. About Page

• URL: GET /about
• Response: "About page"
• Example: http://localhost:3000/about

3. Conditional Routing

• URL: GET /foo
• Response: Randomly returns either:
  • "sometimes this" (50% chance)
  • "and sometimes that" (50% chance)
• Example: http://localhost:3000/foo

4. Regular Expression Route

• URL: GET /user or GET /username
• Response: "User route matched"
• Examples:
  • http://localhost:3000/user
  • http://localhost:3000/username

5. Dynamic Route with Parameter

• URL: GET /user/:username
• Response: "Hello {username}"
• Example: http://localhost:3000/user/john → "Hello john"

6. Query String Handling

• URL: GET /get?param1=value1&param2=value2
• Response: "Check console for query parameters"
• Note: Query parameters are logged to the console
• Example: http://localhost:3000/get?name=John&age=25

7. 404 Error Handler

• URL: Any undefined route
• Response: "404 - Not Found"
• Example: http://localhost:3000/nonexistent

Project Structure

express-web-server/
├── server.js           # Main application file
├── server.test.js      # Test suite
├── package.json        # Project dependencies
└── README.md          # Documentation

Author

Created as part of a Node.js/Express.js learning assignment.

License

ISC

Video Demonstration

[https://youtu.be/PMrY1dqfNkM]

The video demonstrates:

• Server startup
• All route functionalities