# @objectstack/plugin-hono-server

HTTP Server adapter for ObjectStack using Hono.

## Features

- **Standard Runtime**: Uses the unified `HttpDispatcher` and standard Hono adapter via `@objectstack/hono`.
- **Fast**: Built on Hono, a high-performance web framework.
- **Full Protocol Support**: Automatically provides all ObjectStack Runtime endpoints (Auth, Data, Metadata, etc.).
- **Middleware**: Supports standard Hono middleware.
- **Wildcard CORS**: Supports wildcard patterns in CORS origins (compatible with better-auth).

## Usage

```typescript
import { ObjectKernel } from '@objectstack/runtime';
import { HonoServerPlugin } from '@objectstack/plugin-hono-server';

const kernel = new ObjectKernel();

// Register the server plugin
kernel.use(new HonoServerPlugin({
  port: 3000,
  restConfig: {
      api: {
          apiPath: '/api/v1' // Customize API prefix
      }
  }
}));

await kernel.start();
```

## CORS Configuration

The Hono server plugin supports flexible CORS configuration with wildcard pattern matching.

### Basic CORS

```typescript
kernel.use(new HonoServerPlugin({
  port: 3000,
  cors: {
    origins: ['https://app.example.com'],
    credentials: true
  }
}));
```

### Wildcard Patterns (better-auth compatible)

```typescript
// Subdomain wildcards
kernel.use(new HonoServerPlugin({
  cors: {
    origins: ['https://*.objectui.org', 'https://*.objectstack.ai'],
    credentials: true
  }
}));

// Port wildcards (useful for development)
kernel.use(new HonoServerPlugin({
  cors: {
    origins: 'http://localhost:*'
  }
}));

// Comma-separated patterns
kernel.use(new HonoServerPlugin({
  cors: {
    origins: 'https://*.objectui.org,https://*.objectstack.ai,http://localhost:*'
  }
}));
```

### Environment Variables

CORS can also be configured via environment variables:

```bash
# Single origin
CORS_ORIGIN=https://app.example.com

# Wildcard patterns (comma-separated)
CORS_ORIGIN=https://*.objectui.org,https://*.objectstack.ai

# Disable CORS
CORS_ENABLED=false

# Additional options
CORS_CREDENTIALS=true
CORS_MAX_AGE=86400
```

### Disable CORS

```typescript
kernel.use(new HonoServerPlugin({
  cors: false  // Completely disable CORS
}));
```

### Bearer token auth (`set-auth-token`)

The CORS middleware always includes `set-auth-token` in `Access-Control-Expose-Headers`
so that `@objectstack/plugin-auth`'s `bearer()` plugin can deliver rotated session
tokens to cross-origin and mobile clients. `Authorization` is included in
`Access-Control-Allow-Headers` by default so `Authorization: Bearer <token>`
requests succeed preflight.

You can contribute additional exposed / allowed headers — `exposeHeaders`
entries you supply are **merged** with the `set-auth-token` default:

```typescript
kernel.use(new HonoServerPlugin({
  cors: {
    origins: ['https://app.example.com'],
    credentials: true,
    exposeHeaders: ['X-Request-Id'],           // in addition to set-auth-token
    allowHeaders: ['Content-Type', 'Authorization', 'X-Tenant-Id'],
  },
}));
```

## Architecture

This plugin wraps `@objectstack/hono` to provide a turnkey HTTP server solution for the Runtime. It binds the standard `HttpDispatcher` to a Hono application and starts listening on the configured port.

## License

Apache-2.0. See [LICENSING.md](../../../LICENSING.md).
