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#!/usr/bin/env php |
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<?php |
| 3 |
/** |
| 4 |
* MCP HTTP Bridge for WordPress (PHP Implementation) |
| 5 |
* |
| 6 |
* This bridge allows MCP clients to communicate with WordPress MCP tools |
| 7 |
* via HTTP using JSON-RPC protocol. |
| 8 |
* |
| 9 |
* Usage: |
| 10 |
* # Run standalone HTTP server |
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* php mcp-http-bridge.php --port=3000 --host=localhost |
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* |
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* # Or use PHP built-in server |
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* php -S localhost:3000 mcp-http-bridge.php |
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* |
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* Configuration (Claude Desktop/Code): |
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* { |
| 18 |
* "mcpServers": { |
| 19 |
* "wordpress-metasync": { |
| 20 |
* "url": "http://localhost:3000", |
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* "transport": "http" |
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* } |
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* } |
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* } |
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* |
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* Environment Variables: |
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* WP_MCP_PORT=3000 - HTTP server port |
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* WP_MCP_HOST=localhost - HTTP server host |
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* WP_MCP_API_KEY=secret - Required API key for authentication |
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* |
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* @package Metasync |
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* @subpackage Metasync/wp-mcp-server |
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* @since 2.0.0 |
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*/ |
| 35 |
|
| 36 |
// Signal to metasync_init_mcp_server() that MCP init must not be skipped. |
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define('METASYNC_MCP_BRIDGE', true); |
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|
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// Check if running as standalone server or via PHP built-in server |
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$is_builtin_server = php_sapi_name() === 'cli-server'; |
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$is_cli = php_sapi_name() === 'cli'; |
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|
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if (!$is_builtin_server && !$is_cli) { |
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http_response_code(500); |
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die("Error: This script must be run from the command line or via PHP built-in server\n"); |
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} |
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|
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// Suppress unnecessary WordPress output |
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define('WP_CLI', true); |
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define('DOING_AJAX', true); |
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define('WP_USE_THEMES', false); |
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define('DISABLE_WP_CRON', true); |
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|
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// Determine WordPress root path |
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// Try multiple possible locations for WordPress installation |
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|
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$possible_paths = [ |
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// Docker container path |
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'/var/www/html/wp-load.php', |
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// Standard installation (5 levels up from script) |
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dirname(dirname(dirname(dirname(dirname(__FILE__))))) . '/wp-load.php', |
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// Alternative: 4 levels up |
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dirname(dirname(dirname(dirname(__FILE__)))) . '/wp-load.php', |
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// Bedrock/custom structure |
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dirname(dirname(dirname(dirname(dirname(dirname(__FILE__)))))) . '/wp-load.php', |
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]; |
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|
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$wp_load_path = null; |
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foreach ($possible_paths as $path) { |
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if (file_exists($path)) { |
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$wp_load_path = $path; |
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break; |
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} |
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} |
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|
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if (!$wp_load_path) { |
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$error_msg = "Error: Cannot find WordPress wp-load.php\nTried: " . implode(', ', $possible_paths); |
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if ($is_builtin_server) { |
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http_response_code(500); |
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die($error_msg); |
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} else { |
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fwrite(STDERR, $error_msg . "\n"); |
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exit(1); |
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} |
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} |
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|
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// Bootstrap WordPress |
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require_once $wp_load_path; |
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|
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// Verify MCP server is available |
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global $metasync_mcp_server; |
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if (!isset($metasync_mcp_server) || !$metasync_mcp_server) { |
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if ($is_builtin_server) { |
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http_response_code(500); |
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die("Error: Metasync MCP server not initialized"); |
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} else { |
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fwrite(STDERR, "Error: Metasync MCP server not initialized\n"); |
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exit(1); |
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} |
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} |
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|
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// Disable output buffering |
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ob_implicit_flush(true); |
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while (ob_get_level()) { |
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ob_end_clean(); |
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} |
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|
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// If running via PHP built-in server, handle the request immediately |
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if ($is_builtin_server) { |
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handle_http_request(); |
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exit(0); |
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} |
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|
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// Otherwise, start standalone HTTP server |
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start_standalone_server(); |
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|
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/** |
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* Start standalone HTTP server (socket-based) |
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*/ |
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function start_standalone_server() { |
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// Parse command line arguments |
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$options = getopt('', ['port:', 'host:']); |
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$port = $options['port'] ?? getenv('WP_MCP_PORT') ?: 3000; |
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$host = $options['host'] ?? getenv('WP_MCP_HOST') ?: 'localhost'; |
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|
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echo "Starting MCP HTTP Bridge (PHP)...\n"; |
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echo "WordPress version: " . get_bloginfo('version') . "\n"; |
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echo "Metasync version: " . (defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown') . "\n"; |
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echo "Listening on http://{$host}:{$port}\n"; |
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echo "Press Ctrl+C to stop\n\n"; |
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|
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// Create socket |
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$socket = @stream_socket_server("tcp://{$host}:{$port}", $errno, $errstr); |
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|
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if (!$socket) { |
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fwrite(STDERR, "Error: Could not create socket: $errstr ($errno)\n"); |
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exit(1); |
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} |
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|
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// Accept connections in loop |
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while (true) { |
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$client = @stream_socket_accept($socket, -1); |
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if (!$client) { |
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continue; |
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} |
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|
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// Read HTTP request |
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$request = ''; |
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while (!feof($client)) { |
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$line = fgets($client); |
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$request .= $line; |
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if (trim($line) === '') { |
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// Headers ended, read body if present |
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$headers = parse_http_headers($request); |
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if (isset($headers['content-length'])) { |
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$body = fread($client, (int)$headers['content-length']); |
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$request .= $body; |
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} |
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break; |
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} |
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} |
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|
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// Process request |
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$response = process_http_request($request); |
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|
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// Send response |
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fwrite($client, $response); |
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fclose($client); |
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} |
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|
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fclose($socket); |
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} |
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|
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/** |
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* Handle HTTP request (for PHP built-in server) |
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*/ |
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function handle_http_request() { |
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// Set CORS headers |
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set_cors_headers(); |
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|
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// Handle OPTIONS (preflight) |
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if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { |
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http_response_code(204); |
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exit(0); |
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} |
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|
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// Health check endpoint |
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if ($_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['REQUEST_URI'] === '/health') { |
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handle_health_check(); |
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exit(0); |
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} |
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|
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// MCP endpoint - must be POST |
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if ($_SERVER['REQUEST_METHOD'] !== 'POST') { |
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http_response_code(405); |
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header('Content-Type: application/json'); |
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echo json_encode(['error' => 'Method not allowed. Use POST for MCP requests.']); |
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exit(0); |
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} |
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|
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// Authenticate every bridge request. |
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check_authentication(); |
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|
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// Read request body |
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$request_body = file_get_contents('php://input'); |
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|
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if (empty($request_body)) { |
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http_response_code(400); |
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header('Content-Type: application/json'); |
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echo json_encode(['error' => 'Empty request body']); |
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exit(0); |
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} |
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|
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$result = process_mcp_request($request_body); |
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header('Content-Type: application/json'); |
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http_response_code($result['status']); |
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foreach ($result['headers'] as $name => $value) { |
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header($name . ': ' . $value); |
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} |
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if ($result['body'] !== null) { |
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echo json_encode($result['body']); |
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} |
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} |
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|
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/** |
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* Process HTTP request (for standalone server) |
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*/ |
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function process_http_request($http_request) { |
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$lines = explode("\r\n", $http_request); |
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$request_line = $lines[0]; |
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$parts = explode(' ', $request_line); |
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|
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$method = $parts[0] ?? 'GET'; |
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$path = $parts[1] ?? '/'; |
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|
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// Parse headers |
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$headers = parse_http_headers($http_request); |
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|
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// Set default headers |
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$response_headers = [ |
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'HTTP/1.1 200 OK', |
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'Content-Type: application/json', |
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'Access-Control-Allow-Origin: *', |
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'Access-Control-Allow-Methods: GET, POST, OPTIONS', |
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'Access-Control-Allow-Headers: Content-Type, X-API-Key', |
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]; |
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|
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// Handle OPTIONS (preflight) |
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if ($method === 'OPTIONS') { |
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$response_headers[0] = 'HTTP/1.1 204 No Content'; |
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return implode("\r\n", $response_headers) . "\r\n\r\n"; |
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} |
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|
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// Health check |
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if ($method === 'GET' && $path === '/health') { |
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$body = json_encode([ |
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'status' => 'ok', |
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'service' => 'wordpress-metasync-mcp', |
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'wordpress_version' => get_bloginfo('version'), |
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'metasync_version' => defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown', |
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'timestamp' => time() |
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]); |
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|
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$response_headers[] = 'Content-Length: ' . strlen($body); |
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return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
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} |
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|
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// MCP endpoint - must be POST |
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if ($method !== 'POST') { |
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$response_headers[0] = 'HTTP/1.1 405 Method Not Allowed'; |
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$body = json_encode(['error' => 'Method not allowed']); |
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$response_headers[] = 'Content-Length: ' . strlen($body); |
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return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
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} |
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|
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// Check authentication — deny by default when no API key is configured |
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$auth_result = authenticate_bridge_key($headers['x-api-key'] ?? ''); |
| 278 |
if (is_wp_error($auth_result)) { |
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$response_headers[0] = 'HTTP/1.1 401 Unauthorized'; |
| 280 |
$body = json_encode(['error' => $auth_result->get_error_message()]); |
| 281 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
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return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
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} |
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|
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// Extract request body |
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$body_start = strpos($http_request, "\r\n\r\n"); |
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$request_body = $body_start !== false ? substr($http_request, $body_start + 4) : ''; |
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|
| 289 |
if (empty($request_body)) { |
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$response_headers[0] = 'HTTP/1.1 400 Bad Request'; |
| 291 |
$body = json_encode(['error' => 'Empty request body']); |
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$response_headers[] = 'Content-Length: ' . strlen($body); |
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return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
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} |
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|
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$result = process_mcp_request($request_body); |
| 297 |
if ($result['status'] === 429) { |
| 298 |
$response_headers[0] = 'HTTP/1.1 429 Too Many Requests'; |
| 299 |
} elseif ($result['status'] >= 400) { |
| 300 |
$response_headers[0] = 'HTTP/1.1 ' . $result['status'] . ' Error'; |
| 301 |
} |
| 302 |
foreach ($result['headers'] as $name => $value) { |
| 303 |
$response_headers[] = $name . ': ' . $value; |
| 304 |
} |
| 305 |
$body = $result['body'] === null ? '' : json_encode($result['body']); |
| 306 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 307 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 308 |
} |
| 309 |
|
| 310 |
/** |
| 311 |
* Parse HTTP headers |
| 312 |
*/ |
| 313 |
function parse_http_headers($http_request) { |
| 314 |
$headers = []; |
| 315 |
$lines = explode("\r\n", $http_request); |
| 316 |
|
| 317 |
foreach ($lines as $line) { |
| 318 |
if (strpos($line, ':') !== false) { |
| 319 |
list($key, $value) = explode(':', $line, 2); |
| 320 |
$headers[strtolower(trim($key))] = trim($value); |
| 321 |
} |
| 322 |
} |
| 323 |
|
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return $headers; |
| 325 |
} |
| 326 |
|
| 327 |
/** |
| 328 |
* Set CORS headers |
| 329 |
*/ |
| 330 |
function set_cors_headers() { |
| 331 |
$allowed_origins = array(); |
| 332 |
if (function_exists('home_url')) { |
| 333 |
$allowed_origins[] = home_url(); |
| 334 |
} |
| 335 |
if (function_exists('site_url')) { |
| 336 |
$allowed_origins[] = site_url(); |
| 337 |
} |
| 338 |
$origin = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : ''; |
| 339 |
if (!empty($origin) && in_array($origin, $allowed_origins, true)) { |
| 340 |
header('Access-Control-Allow-Origin: ' . $origin); |
| 341 |
} |
| 342 |
header('Access-Control-Allow-Methods: GET, POST, OPTIONS'); |
| 343 |
header('Access-Control-Allow-Headers: Content-Type, X-API-Key'); |
| 344 |
} |
| 345 |
|
| 346 |
/** |
| 347 |
* Check authentication |
| 348 |
*/ |
| 349 |
function check_authentication() { |
| 350 |
$auth_result = authenticate_bridge_key($_SERVER['HTTP_X_API_KEY'] ?? ''); |
| 351 |
if (is_wp_error($auth_result)) { |
| 352 |
http_response_code(401); |
| 353 |
header('Content-Type: application/json'); |
| 354 |
echo json_encode(['error' => $auth_result->get_error_message()]); |
| 355 |
exit(0); |
| 356 |
} |
| 357 |
} |
| 358 |
|
| 359 |
/** |
| 360 |
* Handle health check |
| 361 |
*/ |
| 362 |
function handle_health_check() { |
| 363 |
global $metasync_mcp_server; |
| 364 |
|
| 365 |
$tools_count = $metasync_mcp_server->get_tool_registry()->get_tool_count(); |
| 366 |
|
| 367 |
http_response_code(200); |
| 368 |
header('Content-Type: application/json'); |
| 369 |
echo json_encode([ |
| 370 |
'status' => 'ok', |
| 371 |
'service' => 'wordpress-metasync-mcp', |
| 372 |
'wordpress_version' => get_bloginfo('version'), |
| 373 |
'metasync_version' => defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown', |
| 374 |
'tools_count' => $tools_count, |
| 375 |
'timestamp' => time() |
| 376 |
]); |
| 377 |
} |
| 378 |
|
| 379 |
/** |
| 380 |
* Authenticate a bridge request through the shared MCP server. |
| 381 |
* |
| 382 |
* @param string $provided_key API key supplied by the transport. |
| 383 |
* @return true|WP_Error |
| 384 |
*/ |
| 385 |
function authenticate_bridge_key($provided_key) { |
| 386 |
global $metasync_mcp_server; |
| 387 |
|
| 388 |
return $metasync_mcp_server->authenticate_bridge_request($provided_key); |
| 389 |
} |
| 390 |
|
| 391 |
/** |
| 392 |
* Process a raw JSON-RPC request through the shared MCP server path. |
| 393 |
* |
| 394 |
* @param string $request_body Raw JSON-RPC request body. |
| 395 |
* @return array Processing result with body, status, and headers. |
| 396 |
*/ |
| 397 |
function process_mcp_request($request_body) { |
| 398 |
global $metasync_mcp_server; |
| 399 |
|
| 400 |
return $metasync_mcp_server->process_json_rpc_request($request_body); |
| 401 |
} |
| 402 |
|
