Added support for hot reload, start, stop, restart, and virtual hosts

README.md

@@ -2106,9 +2106,72 @@ Create `config/server.json` next to your `web/` directory, or pass `--config=pat
 | `socket.js` | `"/Q/socket.js"` | Path to serve the minimal bare-WebSocket client (3KB). `false` to disable. |
 | `app` | `""` | App name — prefixes handler function names (e.g. `"Chess"` → `Chess_chat_message()`) |
 | `webserver.fallback` | null | Catch-all: `"index.html"`, `{"handler":"app/notfound"}`, or `{"file":"404.html"}` |
+| `webserver.hotReload` | `false` | Watch `classes/`, `handlers/`, `config/` for changes. Auto-restarts on class/config changes. |
 | `webserver.cgi.patterns` | [] | Regex patterns for scripts that use php-cgi (legacy compatibility) |
 | `webserver.cgi.binary` | auto | Path to php-cgi binary (auto-detected if not set) |
 
+### Virtual hosts
+
+Serve multiple domains from one server. Each host can have its own document root:
+
+```json
+{
+    "Q": {
+        "webserver": {
+            "hosts": {
+                "example.com": {
+                    "root": "/var/www/example/web"
+                },
+                "api.example.com": {
+                    "root": "/var/www/api/web"
+                },
+                "staging.example.com": {
+                    "root": "/var/www/staging/web"
+                }
+            }
+        }
+    }
+}
+```
+
+The `Host` header selects the root. Requests for unconfigured hosts use the
+default `--root` directory. WebSocket, rooms, handlers, and static files all
+respect the per-host root.
+
+### Hot reload
+
+Watch `classes/`, `handlers/`, and `config/` for file changes:
+
+```bash
+php qbixserver.php --root=./web --port=8080 --hotreload
+```
+
+Or via config:
+
+```json
+{
+    "Q": {
+        "webserver": {
+            "hotReload": true
+        }
+    }
+}
+```
+
+Handler changes take effect immediately — handlers are lazy-loaded, so the
+next request or connection picks up the new code. Class or config changes
+trigger a graceful restart (the server re-execs itself with the same arguments).
+
+Changes are logged to stderr:
+
+```
+14:32:07 hot-reload: ~ handlers/chat/message.php
+14:32:09 hot-reload: + classes/MyApp/NewFeature.php
+14:32:09 hot-reload: restarting server...
+```
+
+Polls every 2 seconds. Use in development, not production.
+
 ### Scheduler
 
 Run tasks on intervals or at specific times. Handlers are forked like HTTP
@@ -2599,8 +2662,8 @@ the full 10x performance advantage, use Linux or macOS (or WSL).
 
 **Coming next:**
 
-- **Virtual hosts** — `Q.web.hosts.$hostname` config overrides for multi-domain serving
+- **Clustering** — multi-process worker pool with shared socket for horizontal scaling
-- **Hot reload** — watch `classes/`, `handlers/`, `config/` for changes, auto-restart workers
+- **HTTP long-polling** — Socket.IO polling transport for environments that block WebSocket
 
 ---
 

qbixserver.php

@@ -38,7 +38,7 @@ foreach ($argv as $i => $arg) {
 	if ($i === 0) continue;
 	if ($arg === '--help' || $arg === '-h') {
 		echo "Qbix Server v" . QBIX_SERVER_VERSION . "\n\n";
-		echo "Usage: php qbixserver.php [options]\n\n";
+		echo "Usage: ./qbixserver.php [options]\n\n";
 		echo "Options:\n";
 		echo "  --root=DIR       Document root (default: ./web)\n";
 		echo "  --app=DIR        Qbix app directory (uses full Q framework)\n";
@@ -47,7 +47,11 @@ foreach ($argv as $i => $arg) {
 		echo "  --workers=N      Pre-fork workers (default: 0 = in-process)\n";
 		echo "  --config=FILE    JSON config file\n";
 		echo "  --pid=PATH       PID file path\n";
+		echo "  --hotreload      Watch files, auto-restart on changes\n";
 		echo "  --debug          Verbose logging\n";
+		echo "  -t               Test config and exit\n";
+		echo "  --stop           Graceful shutdown (via PID file)\n";
+		echo "  --reload         Re-exec server (via PID file)\n";
 		echo "  --version        Print version\n";
 		exit(0);
 	}
@@ -55,10 +59,26 @@ foreach ($argv as $i => $arg) {
 		echo "Qbix Server v" . QBIX_SERVER_VERSION . "\n";
 		exit(0);
 	}
+	if ($arg === '-t') {
+		$opts['test'] = true;
+		continue;
+	}
+	if ($arg === '--stop') {
+		$opts['signal'] = 'stop';
+		continue;
+	}
+	if ($arg === '--reload') {
+		$opts['signal'] = 'reload';
+		continue;
+	}
 	if ($arg === '--debug') {
 		$opts['debug'] = true;
 		continue;
 	}
+	if ($arg === '--hotreload') {
+		$opts['hotreload'] = true;
+		continue;
+	}
 	if (preg_match('/^--(\w+)=(.+)$/', $arg, $m)) {
 		$opts[$m[1]] = $m[2];
 	}
@@ -208,6 +228,66 @@ if (file_exists($appConfig)) {
 // Preload handlers if configured (Q.handlers.preload: true)
 Q::preload();
 
+// CLI flag overrides
+if (!empty($opts['hotreload'])) {
+	Q_Config::set('Q', 'webserver', 'hotReload', true);
+}
+
+// ── Signal commands (--stop, --reload) ──────────────
+
+if (!empty($opts['signal'])) {
+	$pidFile = $opts['pid'] ?: dirname($webDir) . '/qbixserver.pid';
+	if (!file_exists($pidFile)) {
+		fwrite(STDERR, "PID file not found: $pidFile\n");
+		fwrite(STDERR, "Use --pid=PATH to specify, or start the server with --pid first.\n");
+		exit(1);
+	}
+	$pid = (int) trim(file_get_contents($pidFile));
+	if ($pid <= 0 || !posix_kill($pid, 0)) {
+		fwrite(STDERR, "No running server found (PID $pid)\n");
+		@unlink($pidFile);
+		exit(1);
+	}
+	if ($opts['signal'] === 'stop') {
+		posix_kill($pid, SIGTERM);
+		echo "Sent SIGTERM to PID $pid\n";
+	} elseif ($opts['signal'] === 'reload') {
+		posix_kill($pid, SIGHUP);
+		echo "Sent SIGHUP to PID $pid\n";
+	}
+	exit(0);
+}
+
+// ── Config test (-t) ────────────────────────────────
+
+if (!empty($opts['test'])) {
+	echo "Qbix Server v" . QBIX_SERVER_VERSION . "\n";
+	echo "Config: OK\n";
+	echo "  Root:       $webDir\n";
+	echo "  Host:       {$opts['host']}\n";
+	echo "  Port:       {$opts['port']}\n";
+	$app = Q::app();
+	if ($app) echo "  App:        $app\n";
+	$ioPath = Q_Config::get('Q', 'socket', 'io', '/socket.io');
+	echo "  Socket.IO:  " . ($ioPath !== false ? $ioPath : 'disabled') . "\n";
+	$jsPath = Q_Config::get('Q', 'socket', 'js', '/Q/socket.js');
+	echo "  Socket.js:  " . ($jsPath !== false ? $jsPath : 'disabled') . "\n";
+	$hosts = Q_Config::get('Q', 'webserver', 'hosts', array());
+	if (!empty($hosts)) {
+		echo "  Vhosts:     " . implode(', ', array_keys($hosts)) . "\n";
+	}
+	$schedule = Q_Config::get('Q', 'scheduler', array());
+	if (!empty($schedule)) {
+		echo "  Scheduled:  " . implode(', ', array_keys($schedule)) . "\n";
+	}
+	$timeout = Q_Config::get('Q', 'webserver', 'requestTimeout', 30);
+	echo "  Timeout:    {$timeout}s\n";
+	$preloaded = Q::$preloadedHandlers;
+	echo "  Classes:    " . count(get_declared_classes()) . " preloaded\n";
+	echo "  Handlers:   " . ($preloaded > 0 ? "$preloaded preloaded" : "lazy") . "\n";
+	exit(0);
+}
+
 // ── PID file ────────────────────────────────────────
 
 if ($opts['pid']) {

service/README.md

@@ -0,0 +1,52 @@
+# Running Qbix Server as a Service
+
+## Linux (systemd)
+
+```bash
+# Edit paths in the service file
+sudo cp service/qbixserver.service /etc/systemd/system/
+sudo systemctl daemon-reload
+
+# Start, stop, reload
+sudo systemctl start qbixserver
+sudo systemctl stop qbixserver
+sudo systemctl reload qbixserver    # re-reads config, restarts workers
+
+# Auto-start on boot
+sudo systemctl enable qbixserver
+
+# View logs
+journalctl -u qbixserver -f
+```
+
+## macOS (launchd)
+
+```bash
+# Edit paths in the plist file
+cp service/com.qbix.server.plist ~/Library/LaunchAgents/
+
+# Start, stop
+launchctl load ~/Library/LaunchAgents/com.qbix.server.plist
+launchctl unload ~/Library/LaunchAgents/com.qbix.server.plist
+
+# View logs
+tail -f /var/log/qbixserver.log
+```
+
+For system-wide (not per-user), use `/Library/LaunchDaemons/` instead.
+
+## Manual (any platform)
+
+```bash
+# Start in background
+./qbixserver.php --root=./web --port=8080 --pid=./qbixserver.pid &
+
+# Stop
+./qbixserver.php --stop --pid=./qbixserver.pid
+
+# Reload (graceful restart)
+./qbixserver.php --reload --pid=./qbixserver.pid
+
+# Test config
+./qbixserver.php -t
+```

service/com.qbix.server.plist

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>com.qbix.server</string>
+
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/local/bin/php</string>
+        <string>/var/www/myapp/qbixserver.php</string>
+        <string>--root=./web</string>
+        <string>--port=8080</string>
+        <string>--pid=/tmp/qbixserver.pid</string>
+    </array>
+
+    <key>WorkingDirectory</key>
+    <string>/var/www/myapp</string>
+
+    <key>RunAtLoad</key>
+    <true/>
+
+    <key>KeepAlive</key>
+    <true/>
+
+    <key>StandardOutPath</key>
+    <string>/var/log/qbixserver.log</string>
+
+    <key>StandardErrorPath</key>
+    <string>/var/log/qbixserver.error.log</string>
+</dict>
+</plist>

service/qbixserver.service

@@ -0,0 +1,25 @@
+[Unit]
+Description=Qbix Server
+After=network.target
+
+[Service]
+Type=simple
+User=www-data
+Group=www-data
+WorkingDirectory=/var/www/myapp
+ExecStart=/usr/bin/php /var/www/myapp/qbixserver.php --root=./web --port=8080 --pid=/var/run/qbixserver.pid
+ExecStop=/usr/bin/php /var/www/myapp/qbixserver.php --stop --pid=/var/run/qbixserver.pid
+ExecReload=/usr/bin/php /var/www/myapp/qbixserver.php --reload --pid=/var/run/qbixserver.pid
+PIDFile=/var/run/qbixserver.pid
+Restart=on-failure
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+
+# Security hardening
+NoNewPrivileges=true
+ProtectSystem=strict
+ReadWritePaths=/var/www/myapp /var/run
+
+[Install]
+WantedBy=multi-user.target

src/Q/HotReload.php

@@ -0,0 +1,169 @@
+<?php
+/**
+ * Hot reload — watches directories for file changes and triggers
+ * a graceful server restart when detected.
+ *
+ * Uses filemtime() polling (works everywhere, no extensions needed).
+ * Watches classes/, handlers/, config/ directories.
+ *
+ * Config:
+ *   "Q": {"webserver": {"hotReload": true}}
+ *
+ * When a change is detected:
+ *   - Handler changes: no action needed (lazy-loaded, next fork loads fresh)
+ *   - Class/config changes: graceful restart via re-exec
+ *
+ * @class Q_HotReload
+ */
+class Q_HotReload
+{
+	/** @var array path => mtime snapshot */
+	static $snapshot = array();
+	/** @var float Last full scan time */
+	static $lastScan = 0;
+	/** @var array Directories to watch */
+	static $watchDirs = array();
+	/** @var boolean Whether a restart is pending */
+	static $restarting = false;
+
+	/**
+	 * Initialize: snapshot all watched files.
+	 */
+	static function init()
+	{
+		// Watch standard directories relative to each registered path
+		foreach (Q::$paths as $base) {
+			foreach (array('classes', 'handlers', 'config') as $dir) {
+				$full = $base . DS . $dir;
+				if (is_dir($full)) {
+					self::$watchDirs[] = $full;
+				}
+			}
+		}
+
+		if (empty(self::$watchDirs)) return;
+
+		self::$snapshot = self::scan();
+		self::$lastScan = microtime(true);
+	}
+
+	/**
+	 * Check for changes. Called every 2 seconds by the event loop.
+	 */
+	static function check()
+	{
+		if (self::$restarting || empty(self::$watchDirs)) return;
+
+		$current = self::scan();
+		$changes = self::diff($current);
+
+		if (empty($changes)) {
+			self::$snapshot = $current;
+			return;
+		}
+
+		// Categorize changes
+		$needsRestart = false;
+		foreach ($changes as $file => $type) {
+			$rel = self::relativePath($file);
+			if (strpos($rel, 'classes' . DS) === 0 || strpos($rel, 'config' . DS) === 0) {
+				$needsRestart = true;
+			}
+			$label = ($type === 'added') ? "\033[32m+\033[0m" :
+					 (($type === 'removed') ? "\033[31m-\033[0m" : "\033[33m~\033[0m");
+			fwrite(STDERR, date('H:i:s') . " hot-reload: $label $rel\n");
+		}
+
+		self::$snapshot = $current;
+
+		if ($needsRestart) {
+			self::restart();
+		}
+	}
+
+	/**
+	 * Scan all watched directories, return path => mtime map.
+	 */
+	static function scan()
+	{
+		$files = array();
+		foreach (self::$watchDirs as $dir) {
+			self::scanDir($dir, $files);
+		}
+		return $files;
+	}
+
+	private static function scanDir($dir, &$files)
+	{
+		$entries = @scandir($dir);
+		if (!$entries) return;
+		foreach ($entries as $e) {
+			if ($e[0] === '.') continue;
+			$path = $dir . DS . $e;
+			if (is_dir($path)) {
+				self::scanDir($path, $files);
+			} elseif (is_file($path)) {
+				$files[$path] = @filemtime($path);
+			}
+		}
+	}
+
+	/**
+	 * Compare current scan to snapshot, return changed files.
+	 */
+	static function diff($current)
+	{
+		$changes = array();
+		// Modified or added
+		foreach ($current as $path => $mtime) {
+			if (!isset(self::$snapshot[$path])) {
+				$changes[$path] = 'added';
+			} elseif ($mtime !== self::$snapshot[$path]) {
+				$changes[$path] = 'modified';
+			}
+		}
+		// Removed
+		foreach (self::$snapshot as $path => $mtime) {
+			if (!isset($current[$path])) {
+				$changes[$path] = 'removed';
+			}
+		}
+		return $changes;
+	}
+
+	/**
+	 * Get a human-readable relative path.
+	 */
+	static function relativePath($path)
+	{
+		foreach (Q::$paths as $base) {
+			if (strpos($path, $base . DS) === 0) {
+				return substr($path, strlen($base) + 1);
+			}
+		}
+		return basename($path);
+	}
+
+	/**
+	 * Graceful restart — re-exec the server process.
+	 */
+	static function restart()
+	{
+		self::$restarting = true;
+		fwrite(STDERR, date('H:i:s') . " hot-reload: restarting server...\n");
+
+		// Re-exec: replace current process with a fresh one
+		// This preserves the original command-line arguments
+		$args = $_SERVER['argv'] ?? array();
+		$php = PHP_BINARY;
+
+		if (function_exists('pcntl_exec')) {
+			pcntl_exec($php, $args);
+			// If pcntl_exec fails, fall through
+		}
+
+		// Fallback: signal the event loop to stop, then exec
+		fwrite(STDERR, date('H:i:s') . " hot-reload: stopping for manual restart\n");
+		Q_Evented::stop();
+	}
+}

src/Q/WebServer.php

@@ -347,6 +347,16 @@ class Q_WebServer
 				self::stop();
 				Q_Evented::stop();
 			});
+			Q_Evented::onSignal(SIGHUP, function () {
+				echo "\n  Reloading (SIGHUP)...\n";
+				self::stop();
+				Q_Evented::stop();
+				// Re-exec with same arguments
+				$args = $_SERVER['argv'] ?? array();
+				if (function_exists('pcntl_exec')) {
+					pcntl_exec(PHP_BINARY, $args);
+				}
+			});
 			// Reap zombie children from fork-per-request PHP execution
 			Q_Evented::onSignal(SIGCHLD, function () {
 				while (($pid = pcntl_waitpid(-1, $st, WNOHANG)) > 0) {
@@ -382,6 +392,14 @@ class Q_WebServer
 			});
 		}
 
+		// Hot reload — watch for file changes in classes/, handlers/, config/
+		if (Q_Config::get('Q', 'webserver', 'hotReload', false)) {
+			Q_HotReload::init();
+			Q_Evented::repeat(2, function () {
+				Q_HotReload::check();
+			});
+		}
+
 		Q_Evented::run();
 	}
 
@@ -539,6 +557,7 @@ class Q_WebServer
 			&& self::$keepAliveCount[$key] < $maxKeepAlive;
 
 		try {
+			$savedRoot = self::$rootDir;
 			$keepOpen = self::handleRequest($client, $parsed);
 		} catch (\Throwable $e) {
 			// Never let a request crash the event loop
@@ -553,6 +572,11 @@ class Q_WebServer
 				(self::$onRequest)($parsed['method'] ?? 'GET', $parsed['uri'] ?? '/', 500, $ms);
 			}
 			return;
+		} finally {
+			// Restore rootDir after vhost override
+			if (self::$rootDir !== $savedRoot) {
+				self::$rootDir = $savedRoot;
+			}
 		}
 		$ms = round((microtime(true) - $start) * 1000, 1);
 
@@ -779,6 +803,17 @@ class Q_WebServer
 		$method = $parsed['method'];
 		$path = $parsed['path'];
 
+		// Virtual hosts — override rootDir based on Host header
+		$host = $parsed['headers']['host'] ?? '';
+		$host = strtolower(preg_replace('/:\d+$/', '', $host)); // strip port
+		$hostConfig = Q_Config::get('Q', 'webserver', 'hosts', $host, null);
+		if ($hostConfig && isset($hostConfig['root'])) {
+			$vroot = realpath($hostConfig['root']);
+			if ($vroot && is_dir($vroot)) {
+				self::$rootDir = rtrim(str_replace(array('/', '\\'), DS, $vroot), DS) . DS;
+			}
+		}
+
 		// 1. Dashboard + Panel + WebSocket + Health (/Q/*)
 		// 1. Serve client JS files (before /Q/ check — socket.io.js is at /socket.io/)
 		$jsMap = array();
@@ -2427,14 +2462,16 @@ HTML
 	private static function resolveStatic($urlPath)
 	{
 		// Path resolution cache — avoids repeated realpath() syscalls
+		// Key includes rootDir so vhosts don't cross-contaminate
 		static $pathCache = array();
-		if (isset($pathCache[$urlPath])) {
+		$cacheKey = self::$rootDir . $urlPath;
-			$cached = $pathCache[$urlPath];
+		if (isset($pathCache[$cacheKey])) {
+			$cached = $pathCache[$cacheKey];
 			// Quick mtime check for invalidation (cheaper than realpath)
 			if ($cached === null || file_exists($cached)) {
 				return $cached;
 			}
-			unset($pathCache[$urlPath]);
+			unset($pathCache[$cacheKey]);
 		}
 
 		$rel = str_replace('/', DS, ltrim($urlPath, '/'));
@@ -2443,17 +2480,17 @@ HTML
 		$fsPath = realpath(self::$rootDir . $rel);
 		if (!$fsPath) {
 			// Cache negative results too (404s won't re-stat)
-			if (count($pathCache) < 10000) $pathCache[$urlPath] = null;
+			if (count($pathCache) < 10000) $pathCache[$cacheKey] = null;
 			return null;
 		}
 		$fsPath = str_replace(array('/','\\'), DS, $fsPath);
 		$root = rtrim(self::$rootDir, DS);
 		if ($fsPath !== $root && strncmp($fsPath, self::$rootDir, strlen(self::$rootDir)) !== 0) {
-			$pathCache[$urlPath] = null;
+			$pathCache[$cacheKey] = null;
 			return null; // path traversal
 		}
 		$result = (is_dir($fsPath) || is_file($fsPath)) ? $fsPath : null;
-		if (count($pathCache) < 10000) $pathCache[$urlPath] = $result;
+		if (count($pathCache) < 10000) $pathCache[$cacheKey] = $result;
 		return $result;
 	}
 

src/Q/WebServer/Cache.php

@@ -258,7 +258,8 @@ class Q_WebServer_Cache
 	 */
 	static function cacheKey($parsed)
 	{
-		$parts = $parsed['path'] . '?' . ($parsed['query'] ?? '');
+		$host = $parsed['headers']['host'] ?? '';
+		$parts = $host . $parsed['path'] . '?' . ($parsed['query'] ?? '');
 
 		// Include Accept-Encoding in key for compressed variants
 		$ae = $parsed['headers']['accept-encoding'] ?? '';