# rproxy

rproxy is a high-performance reverse proxy server written in C. It routes HTTP and WebSocket requests to upstream services based on hostname, with support for SSL/TLS termination and connection pooling.

## Features

- Reverse proxy routing by hostname
- SSL/TLS support for upstream connections
- WebSocket proxying
- Connection pooling and idle timeout management
- Real-time monitoring and statistics
- Web-based dashboard for metrics visualization
- SQLite-based persistent statistics storage
- Epoll-based event handling for high concurrency

## Dependencies

- GCC
- OpenSSL (libssl, libcrypto)
- SQLite3
- cJSON library

## Build

```bash
make
```

This compiles the source files in `src/` and produces the `rproxy` executable.

## Configuration

Configuration is defined in `proxy_config.json`:

```json
{
  "port": 9998,
  "reverse_proxy": [
    {
      "hostname": "example.com",
      "upstream_host": "127.0.0.1",
      "upstream_port": 5000,
      "use_ssl": false,
      "rewrite_host": true
    }
  ]
}
```

- `port`: Listening port for incoming connections
- `reverse_proxy`: Array of routing rules
  - `hostname`: Host header to match for routing
  - `upstream_host`: Target server hostname/IP
  - `upstream_port`: Target server port
  - `use_ssl`: Enable SSL for upstream connection
  - `rewrite_host`: Rewrite Host header to upstream hostname

## Usage

```bash
./rproxy [config_file]
```

If no config file is specified, defaults to `proxy_config.json`.

## Endpoints

- Dashboard: `http://localhost:{port}/rproxy/dashboard`
- API Stats: `http://localhost:{port}/rproxy/api/stats`

## Architecture

- **main.c**: Entry point, event loop, signal handling
- **connection.c**: Connection management, epoll handling
- **http.c**: HTTP request/response parsing
- **ssl_handler.c**: SSL/TLS connection handling
- **monitor.c**: System and per-vhost statistics collection
- **dashboard.c**: Web dashboard generation
- **config.c**: JSON configuration parsing
- **buffer.c**: Circular buffer implementation
- **logging.c**: Logging utilities

## Testing

```bash
make test
```

Runs unit tests for core components.