# No-as-a-Service

This is a simple Ruby web service that responds with "No" in various languages. It's designed to accept both HTML and JSON requests and includes rate limiting, structured logging, and support for deployment using **Podman** and **systemd**.

## Features
- Returns "No" in multiple languages and styles.
- Supports both HTML and JSON response formats.
- Rate limiting to avoid abuse (30 requests per minute per IP).
- Logs structured output, forwarding logs to **journald** for integration with **systemd**.

## Files
- **app.rb**: The main Ruby application file with Sinatra web service.
- **Containerfile**: Instructions for building the container image using Podman.
- **no-as-a-service.service**: systemd service configuration for managing the application.

## Installation & Deployment

### Prerequisites
- **Podman**: To build and run the container.
- **systemd**: For managing the service.
- **Journald**: For logging.

### Step 1: Build the Container Image

Clone the repository or download the files, and navigate to the folder containing the `Containerfile` and `app.rb`.

Run the following command to build the container image with Podman:

```bash
podman build -t noaas .
```

### Step 2: Create the systemd Service

Copy the **`no-as-a-service.service`** file to your systemd service directory:

```bash
sudo cp no-as-a-service.service /etc/systemd/system/
```

Enable and start the service:

```bash
sudo systemctl daemon-reexec
sudo systemctl daemon-reload
sudo systemctl enable --now no-as-a-service
```

### Step 3: Accessing the Service

Once the service is running, you can access it at:

- **HTML Response**: Open a browser and visit `http://localhost:8080/`.
- **JSON Response**: Send a GET request to `http://localhost:8080/` with an `Accept: application/json` header, or append `?format=json` to the URL.

### Logs

Logs are forwarded to **Journald**. You can view logs using:

```bash
journalctl -u no-as-a-service -t noaas -f
```

### Rate Limiting

Each IP is limited to 30 requests per minute. If this limit is exceeded, the response will be a `429 Too Many Requests` status with a JSON error message.

### Customizing Language Responses

You can customize the "No" responses in various languages by modifying the `NO_RESPONSES` hash in `app.rb`.

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### License

This project is licensed under the MIT License - see the LICENSE file for details.