6. Examples

Objective

The goal of the following examples is to introduce the concepts of Express.js, EJS, and session-based authentication through simple login and registration flows.

Example 1: Simple Registration

Ask

• Create an Express application that allows users to register an account.
• A base repository can be found here.

Features

• Users can enter a username and password to register.
• The registration form submits user data.
• After successful registration, the user is redirected to a homepage.
• Uses sessions to store user state.

Tasks

• Set up the Express server.
• Create an EJS template for user registration.
• Implement form handling for user registration.
• Store users in an in-memory array.
• Redirect users after successful registration.

Example 2: Simple Login

Ask

• Create an Express application that allows users to log in with predefined credentials.
• A base repository can be found here.

Features

• Users can log in with a hardcoded username and password.
• Uses sessions to store login state.
• Users can log out, clearing their session.

Tasks

• Set up the Express server.
• Create an EJS template for user login.
• Implement login logic using form submission.
• Store session data for logged-in users.
• Redirect users appropriately based on login state.

Future Improvements

• Store users in a database instead of an in-memory array.
• Hash passwords for better security.
• Improve error handling to display proper login or registration messages.