No as a Service (NaaS)

A lightweight, production-ready HTTP service that always says "no" in various formats.

Features

• Minimal dependencies (pure Rust, standard library only)
• Multiple response formats (text, JSON, XML, YAML, boolean)
• Mobile-responsive web frontend
• CORS support
• Health check endpoint
• Optimized for small binary size (~1MB)
• Container-ready with health checks

API Endpoints

• GET / - Web frontend
• GET /api/no - Returns plain text "no"
• GET /api/no?format=json - Returns {"answer": "no"}
• GET /api/no?format=bool - Returns false
• GET /api/no?format=xml - Returns XML response
• GET /api/no?format=yaml - Returns YAML response
• GET /health - Health check endpoint

Quick Start

Local Development

# Build and run locally
cd naas
cargo build --release
PORT=8080 ./target/release/naas

Visit http://localhost:8080

Container Deployment with Podman

# Build container
cd naas
BUILDAH_FORMAT=docker podman build -t naas:latest -f Containerfile .

# Run container
podman run -d \
  --name naas \
  -p 8080:8080 \
  --restart=always \
  naas:latest

# Check health
curl http://localhost:8080/health

Systemd Service Deployment

1. Setup user and directory:

# Create service user
sudo useradd -r -s /bin/false naas

# Copy application files
sudo mkdir -p /opt/naas
sudo cp -r naas/* /opt/naas/
sudo chown -R naas:naas /opt/naas

2. Install systemd service:

# Copy service file
sudo cp naas/naas.service /etc/systemd/system/

# Reload systemd and start service
sudo systemctl daemon-reload
sudo systemctl enable naas
sudo systemctl start naas

# Check status
sudo systemctl status naas

3. View logs:

sudo journalctl -u naas -f

Production Deployment to no.donothireus.com

Caddy Reverse Proxy Configuration

no.donothireus.com {
    reverse_proxy localhost:8080 {
        header_up Host {host}
        header_up X-Real-IP {remote_host}
        header_up X-Forwarded-For {remote_host}
        header_up X-Forwarded-Proto {scheme}
    }
}

Full Production Setup

1. Deploy application using systemd service (see above)

2. Configure Caddy with the above Caddyfile configuration (SSL certificates are automatic with Caddy)

3. Restart services:

sudo systemctl restart caddy
sudo systemctl restart naas

Performance

• Binary size: ~1MB (release build with optimizations)
• Memory usage: <10MB
• Startup time: <100ms
• Request latency: <1ms

Development

Building from Source

# Debug build
cargo build

# Release build with optimizations
cargo build --release

# Run tests
cargo test

Container Build Options

# Multi-platform build (if needed)
podman build --platform linux/amd64,linux/arm64 -t naas:latest .

# Build with specific Rust version
podman build --build-arg RUST_VERSION=1.75 -t naas:latest .

Security

• Runs as non-root user (UID 1000)
• Read-only container filesystem
• No new privileges
• All capabilities dropped except NET_BIND_SERVICE
• Memory and CPU limits enforced
• CORS headers properly configured

License

MIT