URL Expander and Shortener API

This is a simple Flask application that provides an API for URL expansion and shortening. The application uses two functions from the utils module: shorten_url and expand_url.

Getting Started

1. Clone the repository or download the code.
2. Install the required dependencies by running pip install -r requirements.txt.
3. Run the application by executing python app.py.

API Endpoints

The application provides the following API endpoints:

• GET /: Returns a welcome message.
• POST /shorten: Accepts a JSON object with a url field containing the long URL to be shortened. The application will return a JSON object containing the shortened URL.
• GET /expand/<short_url>: Accepts a short_url parameter. The application will return a JSON object containing the long URL if it exists, or an error message if the URL is not found.

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvements, please open an issue or submit a pull request.