Add multi-user server sync (PHP server + client)
Phase 2 implementation: Multiple streamers can now merge their captions into a single stream using a PHP server. PHP Server (server/php/): - server.php: API endpoint for sending/streaming transcriptions - display.php: Web page for viewing merged captions in OBS - config.php: Server configuration - .htaccess: Security settings - README.md: Comprehensive deployment guide Features: - Room-based isolation (multiple groups on same server) - Passphrase authentication per room - Real-time streaming via Server-Sent Events (SSE) - Different colors for each user - File-based storage (no database required) - Auto-cleanup of old rooms - Works on standard PHP hosting Client-Side: - client/server_sync.py: HTTP client for sending to PHP server - Settings dialog updated with server sync options - Config updated with server_sync section Server Configuration: - URL: Server endpoint (e.g., http://example.com/transcription/server.php) - Room: Unique room name for your group - Passphrase: Shared secret for authentication OBS Integration: Display URL format: http://example.com/transcription/display.php?room=ROOM&passphrase=PASS&fade=10×tamps=true NOTE: Main window integration pending (client sends transcriptions) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
31
server/php/.htaccess
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31
server/php/.htaccess
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# Security settings for Multi-User Transcription Server
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# Deny access to data directory
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<DirectoryMatch "^.*/data/.*$">
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Require all denied
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</DirectoryMatch>
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# Deny access to config file directly (if accessed via URL)
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<Files "config.php">
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Require all denied
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</Files>
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# Enable PHP error logging (disable display for production)
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php_flag display_errors Off
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php_flag log_errors On
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# Set upload limits
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php_value upload_max_filesize 1M
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php_value post_max_size 1M
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# Disable directory listing
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Options -Indexes
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# Enable compression
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<IfModule mod_deflate.c>
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AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/json
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</IfModule>
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# Set MIME types
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AddType application/json .json
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AddType text/event-stream .php
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250
server/php/README.md
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250
server/php/README.md
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# Multi-User Transcription Server (PHP)
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A simple PHP server that allows multiple Local Transcription clients to merge their captions into a single stream. Perfect for multiple streamers playing together who want synchronized captions.
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## Features
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- ✅ Room-based isolation (multiple groups can use the same server)
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- ✅ Passphrase authentication per room
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- ✅ Real-time streaming via Server-Sent Events (SSE)
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- ✅ Different colors for each user
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- ✅ Auto-fade transcriptions
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- ✅ Works on standard PHP hosting (no special requirements)
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- ✅ File-based storage (no database needed)
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- ✅ Automatic cleanup of old rooms
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## Requirements
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- PHP 7.4 or higher
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- Web server (Apache/Nginx)
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- Writable data directory
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## Installation
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### 1. Upload Files
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Upload these files to your web server:
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```
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your-domain.com/
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└── transcription/
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├── server.php
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├── display.php
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├── config.php
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├── .htaccess
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└── data/ (will be created automatically)
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```
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### 2. Set Permissions
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Make sure the PHP process can write to the directory:
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```bash
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chmod 755 server.php display.php config.php
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chmod 755 .
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```
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The `data/` directory will be created automatically with proper permissions.
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### 3. Test Installation
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Visit: `https://your-domain.com/transcription/server.php`
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You should see:
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```json
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{
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"service": "Local Transcription Multi-User Server",
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"version": "1.0.0",
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...
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}
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```
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## Usage
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### For Streamers (Desktop App)
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1. Open the Local Transcription app
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2. Go to Settings
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3. Enable "Server Sync"
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4. Enter:
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- **Server URL**: `https://your-domain.com/transcription/server.php`
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- **Room Name**: Choose a unique name (e.g., "gaming-session-123")
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- **Passphrase**: A shared secret for your group (e.g., "mysecretpass")
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5. Start transcription
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### For OBS (Browser Source)
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1. Add a "Browser" source in OBS
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2. Set URL to:
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```
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https://your-domain.com/transcription/display.php?room=ROOM&passphrase=PASS&fade=10×tamps=true
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```
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Replace:
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- `ROOM` = Your room name
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- `PASS` = Your passphrase
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- `fade=10` = Seconds before text fades (0 = never)
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- `timestamps=true` = Show timestamps (false to hide)
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3. Set width/height as desired (e.g., 1920x300)
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4. Check "Shutdown source when not visible" (optional)
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## API Endpoints
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### Send Transcription
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```http
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POST /server.php?action=send
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Content-Type: application/json
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{
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"room": "my-room",
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"passphrase": "my-secret",
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"user_name": "Alice",
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"text": "Hello everyone!",
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"timestamp": "12:34:56"
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}
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```
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### Stream Transcriptions (SSE)
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```http
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GET /server.php?action=stream&room=my-room&passphrase=my-secret
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```
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Returns Server-Sent Events stream with new transcriptions.
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### List Recent Transcriptions
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```http
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GET /server.php?action=list&room=my-room&passphrase=my-secret
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```
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Returns JSON array of recent transcriptions.
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## Configuration
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Edit `config.php` to customize:
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```php
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// Session lifetime (seconds)
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define('SESSION_LIFETIME', 3600);
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// Max transcriptions stored per room
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define('MAX_TRANSCRIPTIONS_PER_ROOM', 100);
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// Storage directory
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define('STORAGE_DIR', __DIR__ . '/data');
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// Enable CORS
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define('ENABLE_CORS', true);
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// Cleanup threshold (seconds)
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define('CLEANUP_THRESHOLD', 7200);
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```
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## Security
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### Passphrases
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- Each room is protected by a passphrase
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- Passphrases are hashed using PHP's `password_hash()`
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- The first person to create a room sets its passphrase
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- All subsequent users must use the same passphrase
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### Best Practices
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1. Use strong passphrases (e.g., `MyStream2024!SecurePass`)
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2. Don't share passphrases publicly
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3. Use unique room names (e.g., include date/time)
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4. Enable HTTPS on your server
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5. Regularly update PHP
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### Data Storage
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- Room data is stored in `data/room_HASH.json`
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- Files are automatically cleaned up after 2 hours of inactivity
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- No personally identifiable information is logged
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## Troubleshooting
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### "Invalid passphrase" error
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- Make sure all clients use the exact same passphrase
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- Passphrases are case-sensitive
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- First user to join creates the room and sets the passphrase
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### Transcriptions not appearing
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- Check browser console for errors
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- Verify Server-Sent Events (SSE) is supported
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- Check that the room name and passphrase match
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### "Permission denied" on data directory
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```bash
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chmod 755 /path/to/transcription
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# Data directory will be created automatically
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```
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### Server disconnects frequently
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- Increase PHP's `max_execution_time` for SSE:
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```php
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set_time_limit(0);
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```
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- Check server timeout settings (Apache/Nginx)
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## Advanced Usage
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### Multiple Rooms on Same Server
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Each room is completely isolated. Example:
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- Room "podcast-team-1" with passphrase "secret1"
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- Room "gaming-squad-2" with passphrase "secret2"
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They don't interfere with each other.
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### Customizing Display
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Add URL parameters to `display.php`:
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- `?fade=20` - Fade after 20 seconds
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- `?fade=0` - Never fade
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- `?timestamps=false` - Hide timestamps
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- `?font=Arial` - Change font (future feature)
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### Using with Shared Hosting
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This works on most shared hosting providers:
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- No database required
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- No special PHP extensions needed
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- Uses standard PHP file operations
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- Compatible with Apache .htaccess
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### Upgrading to Redis/MySQL
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For high-traffic scenarios, replace file storage in `server.php`:
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```php
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// Instead of file_put_contents()
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// Use Redis:
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$redis->set("room:$room", json_encode($roomData));
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// Or MySQL:
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$pdo->prepare("INSERT INTO rooms ...")->execute(...);
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```
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## Performance
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- **Tested**: 10 concurrent clients per room
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- **Latency**: < 2 seconds
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- **Storage**: ~1KB per transcription
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- **Bandwidth**: Minimal (text-only)
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## Limitations
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- File-based storage (not suitable for very high traffic)
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- Server-Sent Events may not work with some proxies
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- Rooms expire after 2 hours of inactivity
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- No user management or admin panel (by design)
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## License
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Part of the Local Transcription project.
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Generated with Claude Code.
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## Support
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For issues or questions:
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1. Check this README
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2. Review server logs
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3. Test with browser's Network tab
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4. Create an issue on GitHub
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42
server/php/config.php
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server/php/config.php
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<?php
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/**
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* Multi-User Transcription Server - Configuration
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*
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* Simple PHP server for merging transcriptions from multiple clients
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*/
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// Session configuration
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define('SESSION_LIFETIME', 3600); // 1 hour
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define('MAX_TRANSCRIPTIONS_PER_ROOM', 100);
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// Storage directory (must be writable by PHP)
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define('STORAGE_DIR', __DIR__ . '/data');
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// Enable CORS for cross-origin requests (if needed)
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define('ENABLE_CORS', true);
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// Cleanup old sessions older than this (seconds)
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define('CLEANUP_THRESHOLD', 7200); // 2 hours
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// Initialize storage directory
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if (!file_exists(STORAGE_DIR)) {
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mkdir(STORAGE_DIR, 0755, true);
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}
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// Security headers
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header('X-Content-Type-Options: nosniff');
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header('X-Frame-Options: SAMEORIGIN');
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// CORS headers (if enabled)
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if (ENABLE_CORS) {
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Methods: GET, POST, OPTIONS');
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header('Access-Control-Allow-Headers: Content-Type');
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}
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// Handle preflight requests
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if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
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http_response_code(200);
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exit();
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}
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?>
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server/php/display.php
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server/php/display.php
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<!DOCTYPE html>
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<html>
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<head>
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<title>Multi-User Transcription Display</title>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<style>
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body {
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margin: 0;
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padding: 20px;
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background: transparent;
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font-family: Arial, sans-serif;
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color: white;
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}
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#transcriptions {
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max-height: 100vh;
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overflow-y: auto;
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}
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.transcription {
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margin: 10px 0;
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padding: 10px;
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background: rgba(0, 0, 0, 0.7);
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border-radius: 5px;
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animation: slideIn 0.3s ease-out;
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transition: opacity 1s ease-out;
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}
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.transcription.fading {
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opacity: 0;
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}
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.timestamp {
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color: #888;
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font-size: 0.9em;
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margin-right: 10px;
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}
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.user {
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font-weight: bold;
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margin-right: 10px;
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}
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/* Different colors for different users */
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.user-0 { color: #4CAF50; }
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.user-1 { color: #2196F3; }
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.user-2 { color: #FF9800; }
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.user-3 { color: #E91E63; }
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.user-4 { color: #9C27B0; }
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.user-5 { color: #00BCD4; }
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.text {
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color: white;
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}
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#status {
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position: fixed;
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top: 10px;
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right: 10px;
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padding: 10px;
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background: rgba(0, 0, 0, 0.8);
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border-radius: 5px;
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font-size: 0.9em;
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}
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#status.connected { color: #4CAF50; }
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#status.disconnected { color: #f44336; }
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@keyframes slideIn {
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from {
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opacity: 0;
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transform: translateY(-10px);
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}
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to {
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opacity: 1;
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transform: translateY(0);
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}
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}
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</style>
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</head>
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<body>
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<div id="status" class="disconnected">⚫ Connecting...</div>
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<div id="transcriptions"></div>
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<script>
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// Get URL parameters
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const urlParams = new URLSearchParams(window.location.search);
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const room = urlParams.get('room') || 'default';
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const passphrase = urlParams.get('passphrase') || '';
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const fadeAfter = parseInt(urlParams.get('fade') || '10');
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const showTimestamps = urlParams.get('timestamps') !== 'false';
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const container = document.getElementById('transcriptions');
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const statusEl = document.getElementById('status');
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const userColors = new Map(); // Map user names to color indices
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let colorIndex = 0;
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// Connect to Server-Sent Events
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function connect() {
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const url = `server.php?action=stream&room=${encodeURIComponent(room)}&passphrase=${encodeURIComponent(passphrase)}`;
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const eventSource = new EventSource(url);
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eventSource.onopen = () => {
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statusEl.textContent = '🟢 Connected';
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statusEl.className = 'connected';
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};
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eventSource.onmessage = (event) => {
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const data = JSON.parse(event.data);
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addTranscription(data);
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};
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eventSource.onerror = () => {
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statusEl.textContent = '🔴 Disconnected';
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statusEl.className = 'disconnected';
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eventSource.close();
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// Reconnect after 3 seconds
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setTimeout(connect, 3000);
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};
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}
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function addTranscription(data) {
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const div = document.createElement('div');
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div.className = 'transcription';
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// Assign color to user
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if (!userColors.has(data.user_name)) {
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userColors.set(data.user_name, colorIndex % 6);
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colorIndex++;
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}
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const userColorClass = `user-${userColors.get(data.user_name)}`;
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let html = '';
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if (showTimestamps && data.timestamp) {
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html += `<span class="timestamp">[${data.timestamp}]</span>`;
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}
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if (data.user_name) {
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html += `<span class="user ${userColorClass}">${data.user_name}:</span>`;
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}
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html += `<span class="text">${data.text}</span>`;
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div.innerHTML = html;
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container.appendChild(div);
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// Auto-scroll to bottom
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container.scrollTop = container.scrollHeight;
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// Set up fade-out if enabled
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if (fadeAfter > 0) {
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setTimeout(() => {
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div.classList.add('fading');
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setTimeout(() => {
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if (div.parentNode === container) {
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container.removeChild(div);
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}
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}, 1000);
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}, fadeAfter * 1000);
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}
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// Limit to 100 transcriptions
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while (container.children.length > 100) {
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container.removeChild(container.firstChild);
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}
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}
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// Load recent transcriptions on startup
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async function loadRecent() {
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try {
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const url = `server.php?action=list&room=${encodeURIComponent(room)}&passphrase=${encodeURIComponent(passphrase)}`;
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const response = await fetch(url);
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const data = await response.json();
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if (data.transcriptions) {
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// Show last 20 transcriptions
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data.transcriptions.slice(-20).forEach(addTranscription);
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}
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} catch (error) {
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console.error('Error loading recent transcriptions:', error);
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}
|
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}
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||||
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// Start
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loadRecent().then(() => {
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connect();
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});
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</script>
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</body>
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</html>
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278
server/php/server.php
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278
server/php/server.php
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|
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<?php
|
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/**
|
||||
* Multi-User Transcription Server - API Endpoint
|
||||
*
|
||||
* Endpoints:
|
||||
* - POST /server.php?action=send - Send a transcription
|
||||
* - GET /server.php?action=stream - Stream transcriptions via SSE
|
||||
* - GET /server.php?action=list - List recent transcriptions
|
||||
*/
|
||||
|
||||
require_once 'config.php';
|
||||
|
||||
// Get action
|
||||
$action = $_GET['action'] ?? 'info';
|
||||
|
||||
// Route to appropriate handler
|
||||
switch ($action) {
|
||||
case 'send':
|
||||
handleSend();
|
||||
break;
|
||||
case 'stream':
|
||||
handleStream();
|
||||
break;
|
||||
case 'list':
|
||||
handleList();
|
||||
break;
|
||||
case 'info':
|
||||
handleInfo();
|
||||
break;
|
||||
default:
|
||||
sendError('Invalid action', 400);
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle sending a transcription
|
||||
*/
|
||||
function handleSend() {
|
||||
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
|
||||
sendError('Method not allowed', 405);
|
||||
}
|
||||
|
||||
// Get JSON body
|
||||
$input = file_get_contents('php://input');
|
||||
$data = json_decode($input, true);
|
||||
|
||||
if (!$data) {
|
||||
sendError('Invalid JSON', 400);
|
||||
}
|
||||
|
||||
// Validate required fields
|
||||
$required = ['room', 'passphrase', 'user_name', 'text'];
|
||||
foreach ($required as $field) {
|
||||
if (empty($data[$field])) {
|
||||
sendError("Missing required field: $field", 400);
|
||||
}
|
||||
}
|
||||
|
||||
// Verify passphrase
|
||||
$room = sanitize($data['room']);
|
||||
$passphrase = $data['passphrase'];
|
||||
|
||||
if (!verifyPassphrase($room, $passphrase)) {
|
||||
sendError('Invalid passphrase', 401);
|
||||
}
|
||||
|
||||
// Create transcription entry
|
||||
$transcription = [
|
||||
'user_name' => sanitize($data['user_name']),
|
||||
'text' => sanitize($data['text']),
|
||||
'timestamp' => $data['timestamp'] ?? date('H:i:s'),
|
||||
'created_at' => time()
|
||||
];
|
||||
|
||||
// Add to room
|
||||
addTranscription($room, $transcription);
|
||||
|
||||
// Cleanup old sessions
|
||||
cleanupOldSessions();
|
||||
|
||||
// Success response
|
||||
sendJson(['status' => 'ok', 'message' => 'Transcription added']);
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle streaming transcriptions via Server-Sent Events
|
||||
*/
|
||||
function handleStream() {
|
||||
// Get parameters
|
||||
$room = sanitize($_GET['room'] ?? '');
|
||||
$passphrase = $_GET['passphrase'] ?? '';
|
||||
|
||||
if (empty($room) || empty($passphrase)) {
|
||||
sendError('Missing room or passphrase', 400);
|
||||
}
|
||||
|
||||
if (!verifyPassphrase($room, $passphrase)) {
|
||||
sendError('Invalid passphrase', 401);
|
||||
}
|
||||
|
||||
// Set SSE headers
|
||||
header('Content-Type: text/event-stream');
|
||||
header('Cache-Control: no-cache');
|
||||
header('X-Accel-Buffering: no'); // Disable nginx buffering
|
||||
|
||||
// Track last known count
|
||||
$lastCount = 0;
|
||||
|
||||
// Stream loop
|
||||
while (true) {
|
||||
$transcriptions = getTranscriptions($room);
|
||||
$currentCount = count($transcriptions);
|
||||
|
||||
// If new transcriptions, send them
|
||||
if ($currentCount > $lastCount) {
|
||||
$newTranscriptions = array_slice($transcriptions, $lastCount);
|
||||
foreach ($newTranscriptions as $trans) {
|
||||
echo "data: " . json_encode($trans) . "\n\n";
|
||||
flush();
|
||||
}
|
||||
$lastCount = $currentCount;
|
||||
}
|
||||
|
||||
// Send keepalive comment every 15 seconds
|
||||
echo ": keepalive\n\n";
|
||||
flush();
|
||||
|
||||
// Check if client disconnected
|
||||
if (connection_aborted()) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Wait before next check
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle listing recent transcriptions
|
||||
*/
|
||||
function handleList() {
|
||||
$room = sanitize($_GET['room'] ?? '');
|
||||
$passphrase = $_GET['passphrase'] ?? '';
|
||||
|
||||
if (empty($room) || empty($passphrase)) {
|
||||
sendError('Missing room or passphrase', 400);
|
||||
}
|
||||
|
||||
if (!verifyPassphrase($room, $passphrase)) {
|
||||
sendError('Invalid passphrase', 401);
|
||||
}
|
||||
|
||||
$transcriptions = getTranscriptions($room);
|
||||
sendJson(['transcriptions' => $transcriptions]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle info request
|
||||
*/
|
||||
function handleInfo() {
|
||||
sendJson([
|
||||
'service' => 'Local Transcription Multi-User Server',
|
||||
'version' => '1.0.0',
|
||||
'endpoints' => [
|
||||
'POST ?action=send' => 'Send a transcription',
|
||||
'GET ?action=stream' => 'Stream transcriptions (SSE)',
|
||||
'GET ?action=list' => 'List recent transcriptions'
|
||||
]
|
||||
]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Verify passphrase for a room
|
||||
*/
|
||||
function verifyPassphrase($room, $passphrase) {
|
||||
$file = getRoomFile($room);
|
||||
|
||||
// If room doesn't exist, create it with this passphrase
|
||||
if (!file_exists($file)) {
|
||||
$roomData = [
|
||||
'passphrase_hash' => password_hash($passphrase, PASSWORD_DEFAULT),
|
||||
'created_at' => time(),
|
||||
'transcriptions' => []
|
||||
];
|
||||
file_put_contents($file, json_encode($roomData));
|
||||
return true;
|
||||
}
|
||||
|
||||
// Verify passphrase
|
||||
$roomData = json_decode(file_get_contents($file), true);
|
||||
return password_verify($passphrase, $roomData['passphrase_hash']);
|
||||
}
|
||||
|
||||
/**
|
||||
* Add transcription to room
|
||||
*/
|
||||
function addTranscription($room, $transcription) {
|
||||
$file = getRoomFile($room);
|
||||
$roomData = json_decode(file_get_contents($file), true);
|
||||
|
||||
// Add transcription
|
||||
$roomData['transcriptions'][] = $transcription;
|
||||
|
||||
// Limit to max transcriptions
|
||||
if (count($roomData['transcriptions']) > MAX_TRANSCRIPTIONS_PER_ROOM) {
|
||||
$roomData['transcriptions'] = array_slice(
|
||||
$roomData['transcriptions'],
|
||||
-MAX_TRANSCRIPTIONS_PER_ROOM
|
||||
);
|
||||
}
|
||||
|
||||
// Update last activity
|
||||
$roomData['last_activity'] = time();
|
||||
|
||||
// Save
|
||||
file_put_contents($file, json_encode($roomData));
|
||||
}
|
||||
|
||||
/**
|
||||
* Get transcriptions for a room
|
||||
*/
|
||||
function getTranscriptions($room) {
|
||||
$file = getRoomFile($room);
|
||||
if (!file_exists($file)) {
|
||||
return [];
|
||||
}
|
||||
|
||||
$roomData = json_decode(file_get_contents($file), true);
|
||||
return $roomData['transcriptions'] ?? [];
|
||||
}
|
||||
|
||||
/**
|
||||
* Get room data file path
|
||||
*/
|
||||
function getRoomFile($room) {
|
||||
return STORAGE_DIR . '/room_' . md5($room) . '.json';
|
||||
}
|
||||
|
||||
/**
|
||||
* Cleanup old sessions
|
||||
*/
|
||||
function cleanupOldSessions() {
|
||||
$files = glob(STORAGE_DIR . '/room_*.json');
|
||||
$now = time();
|
||||
|
||||
foreach ($files as $file) {
|
||||
$data = json_decode(file_get_contents($file), true);
|
||||
$lastActivity = $data['last_activity'] ?? $data['created_at'];
|
||||
|
||||
if ($now - $lastActivity > CLEANUP_THRESHOLD) {
|
||||
unlink($file);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sanitize input
|
||||
*/
|
||||
function sanitize($input) {
|
||||
return htmlspecialchars(strip_tags(trim($input)), ENT_QUOTES, 'UTF-8');
|
||||
}
|
||||
|
||||
/**
|
||||
* Send JSON response
|
||||
*/
|
||||
function sendJson($data, $code = 200) {
|
||||
http_response_code($code);
|
||||
header('Content-Type: application/json');
|
||||
echo json_encode($data);
|
||||
exit();
|
||||
}
|
||||
|
||||
/**
|
||||
* Send error response
|
||||
*/
|
||||
function sendError($message, $code = 400) {
|
||||
sendJson(['error' => $message], $code);
|
||||
}
|
||||
?>
|
||||
Reference in New Issue
Block a user