# 🌍 Bitip - GeoIP Lookup Service

Bitip is a professional GeoIP lookup service that provides IP geolocation data through a REST API and user-friendly web interface. Built with Express.js, TypeScript, React, and MaxMind GeoLite2 databases.

## ✨ Features

- **🔍 IP Geolocation Lookup**: Get detailed location information for any public IP address
- **🌐 Web Interface**: Clean, professional web UI with interactive maps
- **📡 REST API**: Comprehensive API for single and batch IP lookups
- **📦 .NET Client Library**: Official Bitip.Client NuGet package with strongly-typed models and async support
- **📦 Node.js Client Library**: Official @flare/bitip-client npm package with TypeScript support and modern API
- **🗺️ Interactive Maps**: Static preview and interactive map popups using OpenStreetMap/Leaflet
- **🔐 API Key Authentication**: Secure access with configurable rate limiting
- **⚡ Performance**: In-memory caching and efficient database access
- **📊 Structured Logging**: Optional integration with Seq for advanced logging
- **🐳 Docker Ready**: Production deployment with Docker and geoipupdate integration
- **🔧 Configurable**: Runtime configuration via environment variables

## 📚 Client Libraries

### .NET / C#

Official NuGet package with full async/await support and dependency injection integration:

```bash
dotnet add package Bitip.Client
```

```csharp
// Register in your DI container
services.UseBitipClient("https://your-bitip-instance.com/api", "your-api-key");

// Inject and use
public class MyService
{
    private readonly IBitipClient _bitipClient;

    public MyService(IBitipClient bitipClient)
    {
        _bitipClient = bitipClient;
    }

    public async Task<IpLocation> LookupAsync(string ip)
    {
        return await _bitipClient.GetIpLocation(ip);
    }
}
```

See [src/clients/dotnet/Bitip.Client/README.md](src/clients/dotnet/Bitip.Client/README.md) for complete documentation.

### Node.js / TypeScript

Official npm package with full TypeScript support and modern async/await API:

```bash
npm install @flare/bitip-client
```

```typescript
import { BitipClient } from '@flare/bitip-client';

// Create client instance
const client = new BitipClient({
  baseUrl: 'https://your-bitip-instance.com',
  apiKey: 'your-api-key',
});

// Perform IP lookup
const location = await client.getIpLocation('8.8.8.8');
console.log(location.country); // United States
```

See [src/clients/node/README.md](src/clients/node/README.md) for complete documentation.

### Other Languages

Use the REST API directly - see API documentation below.

## 🚀 Quick Start

### Local Development (No Docker Required)

#### Prerequisites

- Node.js >= 18.0.0
- npm >= 9.0.0
- MaxMind GeoLite2 databases (download from https://www.maxmind.com/en/geolite2/signup or use geoipupdate)

#### 1. Clone and Setup

```bash
git clone <repository-url>
cd Bitip
```

#### 2. Install Dependencies

```bash
npm run install:all
```

#### 3. Configure Environment

Create a `.env` file in the root directory:

```env
# API Keys (change these for production!)
FRONTEND_API_KEY=frontend-dev-key
EXTERNAL_API_KEYS=external-dev-key-1,external-dev-key-2

# Server Configuration
PORT=5172
BASE_PATH=/
NODE_ENV=development
ENABLE_HTTPS_SECURITY=false
LOG_LEVEL=debug  # debug | info | warning | error

# Database Path - Point to your MaxMind databases location
# Both GeoLite2-City.mmdb and GeoLite2-ASN.mmdb are required
MAXMIND_DB_PATH=D:\tools\maxmind-dbs  # Windows
# MAXMIND_DB_PATH=/usr/share/maxmind   # Linux/Mac

# Rate Limiting Configuration
FRONTEND_RATE_WINDOW_MS=60000
FRONTEND_RATE_MAX=30
EXTERNAL_RATE_WINDOW_MS=60000
EXTERNAL_RATE_MAX=1000

# Batch Configuration
BATCH_LIMIT=100
DEBOUNCE_MS=2000

# Seq Logging (Optional)
# SEQ_URL=http://localhost:5341
# SEQ_API_KEY=your-seq-api-key
```

#### 4. Start Development Servers

```bash
npm run dev
```

This will start:

- Backend API server on http://localhost:5172
- Frontend dev server on http://localhost:5173 (or next available port)
- Frontend proxies API requests to backend

#### 5. Access the Application

- **Web Interface**: http://localhost:5173 (or the port shown in console)
- **API Endpoint**: http://localhost:5172/api
- **Health Check**: http://localhost:5172/api/health

### Production Deployment (Docker)

#### Prerequisites

- Docker and Docker Compose
- MaxMind GeoLite2 account (free): https://www.maxmind.com/en/geolite2/signup

#### 1. Configure Environment

Edit `.env` file with your MaxMind credentials and logging level:

```env
GEOIPUPDATE_ACCOUNT_ID=your_account_id_here
GEOIPUPDATE_LICENSE_KEY=your_license_key_here
FRONTEND_API_KEY=your-secure-frontend-api-key-here
EXTERNAL_API_KEYS=your-secure-external-api-key-1,your-secure-external-api-key-2
LOG_LEVEL=warning  # Recommended for production (debug | info | warning | error)
```

#### 2. Start Services

```bash
docker-compose up -d
```

**Or with Docker run:**

```bash
# Build image
docker build -t bitip-geoip:latest .

# Run with custom log level
docker run -d \
  -p 5172:5172 \
  -e LOG_LEVEL=warning \
  -e FRONTEND_API_KEY=your-api-key \
  -v /path/to/maxmind-dbs:/usr/share/maxmind \
  bitip-geoip:latest
```

**Available log levels:**

- `debug` - All logs (verbose, for development/troubleshooting)
- `info` - Info + warnings + errors (default)
- `warning` - Warnings + errors only (recommended for production)
- `error` - Errors only (minimal logging)

#### 3. Access the Service

- **Web Interface**: http://localhost:5172
- **API Endpoint**: http://localhost:5172/api
- **Health Check**: http://localhost:5172/api/health

## 📖 API Documentation

### Authentication

All API requests require an API key sent via header or query parameter:

```bash
# Via Header (recommended)
curl -H "X-API-Key: your-api-key" http://localhost:5172/api/lookup?ip=8.8.8.8

# Via Query Parameter
curl "http://localhost:5172/api/lookup?ip=8.8.8.8&apikey=your-api-key"
```

### Endpoints

#### Get Current IP

```http
GET /api/ip
```

Returns the client's current IP address.

**Response:**

```json
{
  "ip": "203.0.113.42"
}
```

#### Simple IP Lookup

```http
GET /api/lookup?ip=8.8.8.8
```

Returns basic location information:

```json
{
  "ip": "8.8.8.8",
  "country": "United States",
  "country_code": "US",
  "is_in_european_union": false,
  "region": "California",
  "region_code": "CA",
  "city": "Mountain View",
  "latitude": 37.4056,
  "longitude": -122.0775,
  "timezone": "America/Los_Angeles",
  "postal_code": "94043",
  "continent_code": "NA",
  "continent_name": "North America",
  "organization": "Google LLC",
  "asn": 15169
}
```

#### Detailed IP Lookup

```http
GET /api/lookup/detailed?ip=8.8.8.8
```

Returns comprehensive MaxMind database information including all available fields.

#### Batch IP Lookup

```http
POST /api/lookup/batch
Content-Type: application/json

{
  "ips": ["8.8.8.8", "1.1.1.1", "208.67.222.222"]
}
```

**Response:**

```json
{
  "results": [
    {
      "ip": "8.8.8.8",
      "country": "United States",
      ...
    },
    {
      "ip": "1.1.1.1",
      "country": "Australia",
      ...
    }
  ]
}
```

#### Health Check

```http
GET /api/health
```

Returns service health status including database connectivity.

### Error Handling

The API returns appropriate HTTP status codes:

- `400` - Bad Request (invalid IP, private IP, validation errors)
- `401` - Unauthorized (missing or invalid API key)
- `404` - Not Found (IP not in database)
- `429` - Too Many Requests (rate limit exceeded)
- `500` - Internal Server Error
- `503` - Service Unavailable (database maintenance)

## 🛠️ Development

### Project Structure

```
Bitip/
├── src/
│   ├── backend/              # Express.js API server
│   │   ├── handlers/         # Route handlers (separated by concern)
│   │   ├── middleware/       # Express middleware (auth, rate limiting, validators, errorHandler)
│   │   ├── routes/           # API routes (declarative, minimal)
│   │   ├── services/         # Business logic (GeoIP, config, logger)
│   │   ├── tests/            # Test suite (integration + unit tests)
│   │   │   ├── integration/  # API endpoint tests (25 tests)
│   │   │   ├── unit/         # Middleware unit tests (18 tests)
│   │   │   └── setup.ts      # Test configuration and helpers
│   │   ├── types/            # TypeScript type definitions
│   │   ├── utils/            # Utilities (errors, paths)
│   │   ├── app.ts            # Express app factory (without server)
│   │   ├── server.ts         # Server startup and lifecycle
│   │   ├── index.ts          # Entry point (backward compatible)
│   │   ├── vitest.config.ts  # Test configuration
│   │   ├── nodemon.json      # Nodemon configuration
│   │   ├── tsconfig.json     # TypeScript configuration
│   │   └── package.json      # Backend dependencies
│   └── frontend/             # React web application
│       ├── src/
│       │   ├── components/   # React components (MapComponent)
│       │   ├── services/     # API client services
│       │   ├── types/        # TypeScript types
│       │   ├── App.tsx       # Main App component
│       │   ├── App.css       # Application styles
│       │   └── main.tsx      # React entry point
│       ├── index.html        # HTML template
│       ├── vite.config.ts    # Vite configuration
│       ├── tsconfig.json     # TypeScript configuration
│       └── package.json      # Frontend dependencies
├── content/                  # Content files (Overview.json, ReleaseNotes.json)
├── docs/                     # Documentation (PRD, tech stack)
├── .env                      # Environment variables (not in git)
├── .env.example              # Example environment file
├── Dockerfile                # Production Docker image
├── package.json              # Root package configuration
└── README.md
```

### Available Scripts

```bash
# Development
npm run dev              # Start both frontend and backend in dev mode
npm run dev:backend      # Start backend development server only
npm run dev:frontend     # Start frontend development server only

# Building
npm run build            # Build both frontend and backend for production
npm run build:backend    # Build backend only
npm run build:frontend   # Build frontend only

# Production
npm start                # Start production backend server (after build)

# Testing
cd src/backend
npm test                 # Run all tests once
npm run test:watch       # Run tests in watch mode
npm run test:ui          # Open Vitest UI dashboard
npm run test:coverage    # Run tests with coverage report

# Code Quality
npm run lint             # Lint both frontend and backend
npm run lint:fix         # Fix linting issues
npm run format           # Format code with Prettier

# Utilities
npm run clean            # Clean build artifacts
npm run install:all      # Install all dependencies (root + backend + frontend)
```

### Technology Stack

**Backend:**

- Express.js 5.x with TypeScript
- @maxmind/geoip2-node 6.x - GeoIP database reader
- node-cache - In-memory caching
- express-rate-limit 8.x - Rate limiting
- helmet - Security headers
- joi - Request validation
- seq-logging - Optional structured logging
- **tsup** - Modern bundler for fast builds (88ms vs ~1000ms with tsc) ⚡

**Frontend:**

- React 19.x with TypeScript
- Vite 7.x - Build tool and dev server
- Leaflet & react-leaflet - Interactive maps
- Axios - HTTP client
- OpenStreetMap - Map tiles

**Development Tools:**

- TypeScript 5.x
- ESLint & Prettier
- nodemon - Auto-restart on changes
- tsx - TypeScript execution

**Testing (100% Pass Rate):**

- Vitest 3.x - Modern testing framework with ESM support
- Supertest - HTTP assertion library for API testing (no port conflicts)
- @vitest/ui - Visual test dashboard
- @vitest/coverage-v8 - Code coverage reporting
- 43 tests (25 integration + 18 unit) - All passing

**Build System:**

- **tsup** (backend) - esbuild-based bundler with ESM support, no `.js` extensions needed
- **Vite** (frontend) - Lightning-fast HMR and optimized production builds

> 📖 See [tsup Migration Guide](docs/tsup-migration.md) for details on the modern build system.

### Architecture Highlights

**App Factory Pattern** - Production-ready architecture with clean separation:
- **[src/backend/app.ts](src/backend/app.ts)** - Creates Express app without starting server (for testing)
- **[src/backend/server.ts](src/backend/server.ts)** - HTTP server startup with graceful shutdown
- **[src/backend/index.ts](src/backend/index.ts)** - Entry point with backward compatibility

**Benefits:**
- ✅ **Testable** - App can be instantiated without port binding (eliminates test conflicts)
- ✅ **Modular** - Clean separation of concerns (app setup vs server lifecycle)
- ✅ **Production-Ready** - Industry-standard pattern used in professional applications
- ✅ **Fast Tests** - All 43 tests run in ~1 second using Supertest in-memory testing

## ⚙️ Configuration

### Environment Variables

| Variable                   | Default                | Description                                           |
| -------------------------- | ---------------------- | ----------------------------------------------------- |
| `PORT`                     | `5172`                 | Server port                                           |
| `BASE_PATH`                | `/`                    | Application base path                                 |
| `NODE_ENV`                 | `development`          | Environment mode (development/production)             |
| `ENABLE_HTTPS_SECURITY`    | `false`                | Enable HTTPS security headers (CSP, HSTS, COOP, CORP) |
| `MAXMIND_DB_PATH`          | `/usr/share/maxmind`   | MaxMind database directory                            |
| `FRONTEND_API_KEY`         | `frontend-default-key` | Frontend API key                                      |
| `EXTERNAL_API_KEYS`        | `external-default-key` | External API keys (comma-separated)                   |
| `FRONTEND_ALLOWED_ORIGINS` | `http://localhost:*`   | Allowed CORS origins for frontend (comma-separated)   |
| `FRONTEND_RATE_WINDOW_MS`  | `60000`                | Frontend rate limit window (milliseconds)             |
| `FRONTEND_RATE_MAX`        | `30`                   | Frontend rate limit max requests                      |
| `EXTERNAL_RATE_WINDOW_MS`  | `60000`                | External rate limit window (milliseconds)             |
| `EXTERNAL_RATE_MAX`        | `1000`                 | External rate limit max requests                      |
| `BATCH_LIMIT`              | `100`                  | Maximum IPs per batch request                         |
| `DEBOUNCE_MS`              | `2000`                 | Frontend input debounce delay (milliseconds)          |
| `SEQ_URL`                  | -                      | Seq logging server URL (optional)                     |
| `SEQ_API_KEY`              | -                      | Seq API key (optional)                                |

### MaxMind Database Setup

The service requires both MaxMind GeoLite2-City and GeoLite2-ASN databases. You have two options:

**Option 1: Manual Download**

1. Sign up at https://www.maxmind.com/en/geolite2/signup
2. Download both databases (`.mmdb` files):
   - GeoLite2-City.mmdb
   - GeoLite2-ASN.mmdb
3. Place them in the same directory (e.g., `D:\tools\maxmind-dbs` on Windows)
4. Set `MAXMIND_DB_PATH` environment variable to that directory

**Option 2: Using geoipupdate (Production)**

- Use the provided `docker-compose.yml` which includes geoipupdate service
- geoipupdate automatically downloads and updates both databases
- Both services share a Docker volume for database access

### Rate Limiting

Bitip implements different rate limiting for frontend and external API consumers:

- **Frontend**: More restrictive limits for web UI usage (default: 100 req/min)
- **External**: Higher limits for programmatic API access (default: 1000 req/min)

Rate limits are fully configurable via environment variables and include standard HTTP headers in responses.

### HTTPS Security Headers

The `ENABLE_HTTPS_SECURITY` variable controls security headers provided by Helmet:

- **`false` (default)**: Disables CSP, HSTS, COOP, and CORP headers - required for HTTP deployments
- **`true`**: Enables all security headers - use when deploying behind HTTPS reverse proxy (nginx, Traefik, etc.)

**Important**: If running on plain HTTP without a reverse proxy, keep this set to `false`. Browser security policies will block resources if HTTPS security headers are enabled on HTTP connections.

## 🐳 Docker Deployment

### Production Setup

The service is designed to run alongside MaxMind's geoipupdate service:

```bash
# Start both services
docker-compose up -d

# View logs
docker-compose logs -f bitip

# Stop services
docker-compose down
```

The `docker-compose.yml` includes:

- **geoipupdate**: Downloads and updates MaxMind databases
- **bitip**: Main application server (API + Web UI)
- **Shared volume**: For database access between services

### Health Monitoring

The service includes comprehensive health checks:

- Docker health check endpoint: `/api/health`
- Database connectivity verification
- Service status monitoring

## 🔧 Troubleshooting

### Common Issues

**1. Database Not Found**

- Ensure both databases are downloaded to the path specified in `MAXMIND_DB_PATH`
- Check that both `GeoLite2-City.mmdb` and `GeoLite2-ASN.mmdb` files exist in that directory
- Verify file permissions (read access required)

**2. TypeScript Errors**

- Run `npm run install:all` to ensure all dependencies are installed
- Check that Node.js version is >= 18.0.0
- Try deleting `node_modules` and reinstalling

**3. API Authentication Errors**

- Verify API key in `.env` file matches the one you're using
- Check `X-API-Key` header or `apikey` query parameter format
- Ensure API key doesn't contain extra spaces

**4. Rate Limiting**

- Check rate limit headers in API responses (`X-RateLimit-*`)
- Adjust rate limiting configuration if needed
- Use external API keys for higher limits

**5. Map Display Issues**

- Verify internet connectivity for OpenStreetMap tiles
- Check browser console for JavaScript errors
- Ensure Leaflet CSS is loading correctly

**6. Port Already in Use**

- Frontend dev server will auto-increment port (5173, 5174, etc.)
- Backend port can be changed via `PORT` environment variable
- Check for other services using the same ports

**7. Test Failures**

- All 43 tests should pass (100% success rate)
- Run tests: `cd src/backend && npm test`
- Check for environment variables in [src/backend/vitest.config.ts](src/backend/vitest.config.ts#L7)
- Ensure MaxMind databases are accessible at MAXMIND_DB_PATH

### Logs and Debugging

- Application logs are printed to console
- Use `npm run dev` for detailed development logs
- Configure Seq integration for structured logging
- Docker logs: `docker-compose logs -f bitip`

### Running Tests

Backend includes comprehensive automated test suite:

```bash
# Navigate to backend directory
cd src/backend

# Run all tests once
npm test

# Watch mode for development
npm run test:watch

# Visual UI dashboard
npm run test:ui

# Generate coverage report
npm run test:coverage
```

**Test Results:**
- ✅ 43/43 tests passing (100%)
- ⚡ Runs in ~1 second
- 📊 25 integration + 18 unit tests
- 🔍 Coverage reports in coverage/ folder

## 📦 Package Versions

**Current versions (as of project creation):**

- Major packages are on stable versions but not latest
- Consider updating for newer features and security fixes
- Check `npm outdated` for available updates
- Test thoroughly after major version updates

**Key outdated packages:**

- Express 4.x (5.x available but still beta)
- React 18.x (19.x available)
- Vite 4.x (7.x available - major update)
- Many dev dependencies have newer versions

## 📄 License

**Copyright © 2025 Tudor Stanciu. All rights reserved.**

This software is **proprietary** and confidential. Unauthorized use, copying, modification, distribution, or reverse engineering of this software, in whole or in part, is strictly prohibited without explicit written permission from the copyright holder.

### License Summary

- ✅ **Evaluation Period**: 30-day trial for evaluation purposes
- ✅ **Approved Use**: Requires explicit written approval from Tudor Stanciu
- ❌ **No Redistribution**: Cannot be distributed, sublicensed, or transferred to third parties
- ❌ **No Modification**: Cannot be modified or create derivative works without permission
- ❌ **No Commercial Use**: Cannot be used for commercial services without separate license

### Obtaining a License

For licensing inquiries, commercial use, or approval requests:

**Contact**: Tudor Stanciu
**Email**: tudor.stanciu94@gmail.com

Please include:

- Intended use case
- Organization name and size
- Expected deployment scale
- Duration of use

See [LICENSE](LICENSE) file for complete terms and conditions.

## 🙏 Acknowledgments

- **MaxMind** for providing GeoLite2 databases
- **OpenStreetMap** for map tiles
- **Leaflet** for interactive mapping
- All open-source contributors

---

**Bitip** - Professional GeoIP Lookup Service 🌍
Built with ❤️ using Express.js, React, and MaxMind GeoLite2