diff --git a/HttpServer/Events/OnHandshake.php b/HttpServer/Events/OnHandshake.php
index f7a8412a..fa56861b 100644
--- a/HttpServer/Events/OnHandshake.php
+++ b/HttpServer/Events/OnHandshake.php
@@ -37,10 +37,7 @@ class OnHandshake extends Callback
 		if (0 === preg_match($patten, $secWebSocketKey) || 16 !== strlen(base64_decode($secWebSocketKey))) {
 			throw new Exception('protocol error.', 500);
 		}
-		$key = base64_encode(sha1(
-			$request->header['sec-websocket-key'] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11',
-			TRUE
-		));
+		$key = base64_encode(sha1($request->header['sec-websocket-key'] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', TRUE));
 		$headers = [
 			'Upgrade'               => 'websocket',
 			'Connection'            => 'Upgrade',
@@ -69,11 +66,24 @@ class OnHandshake extends Callback
 	}
 
 
+	/**
+	 * @param $response
+	 * @param int $code
+	 * @return false
+	 */
+	private function connect($response, $code = 101): bool
+	{
+		$response->status($code);
+		$response->end();
+		return false;
+	}
+
+
 	/**
 	 * @param SRequest $request
 	 * @param SResponse $response
 	 * @return void
-	 * @throws ComponentException
+	 * @throws Exception
 	 */
 	public function onHandler(SRequest $request, SResponse $response): void
 	{
@@ -88,7 +98,6 @@ class OnHandshake extends Callback
 	 * @param SRequest $request
 	 * @param SResponse $response
 	 * @return mixed
-	 * @throws ComponentException
 	 * @throws Exception
 	 */
 	private function execute(SRequest $request, SResponse $response): mixed
@@ -96,11 +105,8 @@ class OnHandshake extends Callback
 		try {
 			$this->resolveParse($request, $response);
 			if (isset($request->get['debug']) && $request->get['debug'] == 'test') {
-				$response->status(101);
-				$response->end();
-				return true;
+				return $this->connect($response, 101);
 			}
-
 			$router = Snowflake::app()->getRouter();
 			$node = $router->search('/' . Socket::HANDSHAKE . '::event', 'sw::socket');
 			if ($node === null) {
@@ -110,25 +116,9 @@ class OnHandshake extends Callback
 		} catch (\Throwable $exception) {
 			$this->addError($exception->getMessage() . ' ' . $exception->getFile() . ' ' . $exception->getLine());
 			return $this->disconnect($response, 500);
-		} finally {
-			$this->eventTrigger($request, $response);
 		}
 	}
 
 
-	/**
-	 * @param $request
-	 * @param $response
-	 * @throws ComponentException
-	 * @throws Exception
-	 */
-	private function eventTrigger($request, $response)
-	{
-		go(function () use ($request, $response) {
-			$manager = Snowflake::app()->getEvent();
-			$manager->trigger(Event::SERVER_HANDSHAKE, [$request, $response]);
-		});
-	}
-
 
 }
diff --git a/System/Core/Help.php b/System/Core/Help.php
index fb2a805d..ede32159 100644
--- a/System/Core/Help.php
+++ b/System/Core/Help.php
@@ -6,6 +6,7 @@ namespace Snowflake\Core;
 
 
 use Exception;
+use JetBrains\PhpStorm\Pure;
 
 
 /**
@@ -19,11 +20,13 @@ class Help
 	 * @param array $data
 	 * @return string
 	 */
-	public static function toXml(array $data)
+	#[Pure] public static function toXml(array $data): string
 	{
 		$xml = "<xml>";
 		foreach ($data as $key => $val) {
-			if (is_numeric($val)) {
+			if (is_array($val)) {
+				$xml .= "<" . $key . ">" . static::xmlChild($val) . "</" . $key . ">";
+			} else if (is_numeric($val)) {
 				$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
 			} else {
 				$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
@@ -34,6 +37,26 @@ class Help
 	}
 
 
+	/**
+	 * @param array $array
+	 * @return string
+	 */
+	private static function xmlChild(array $array): string
+	{
+		$string = '';
+		foreach ($array as $key => $value) {
+			if (is_array($value)) {
+				$string .= static::xmlChild($value);
+			} else if (is_numeric($value)) {
+				$string .= "<" . $key . ">" . $value . "</" . $key . ">";
+			} else {
+				$string .= "<" . $key . "><![CDATA[" . $value . "]]></" . $key . ">";
+			}
+		}
+		return $string;
+	}
+
+
 	/**
 	 * @param $xml
 	 * @return mixed
@@ -151,7 +174,7 @@ class Help
 	 * @param $type
 	 * @return string
 	 */
-	public static function sign(array $array, $key, $type): string
+	public static function sign(array $array, $key, $type = 'MD5'): string
 	{
 		ksort($array, SORT_ASC);
 		$string = [];
diff --git a/System/Core/Json.php b/System/Core/Json.php
index 040f6c05..6fb2049a 100644
--- a/System/Core/Json.php
+++ b/System/Core/Json.php
@@ -10,7 +10,9 @@ declare(strict_types=1);
 
 namespace Snowflake\Core;
 
+use Error;
 use Exception;
+use Throwable;
 
 /**
  * Class JSON
@@ -19,10 +21,10 @@ use Exception;
 class Json
 {
 
+
 	/**
 	 * @param $data
 	 * @return false|string
-	 * @throws Exception
 	 */
 	public static function encode($data): bool|string
 	{
@@ -49,6 +51,7 @@ class Json
 		return json_decode($data, $asArray);
 	}
 
+
 	/**
 	 * @param $code
 	 * @param string $message
@@ -85,6 +88,24 @@ class Json
 		return static::encode($params);
 	}
 
+
+	/**
+	 * @param Throwable|Error $throwable
+	 * @return bool|string
+	 * @throws Exception
+	 */
+	public static function error(Throwable|Error $throwable): bool|string
+	{
+		$array['code'] = $throwable->getCode() == 0 ? 500 : $throwable->getCode();
+		$array['message'] = $throwable->getMessage();
+		$array['param'] = [
+			'file' => $throwable->getFile(),
+			'line' => $throwable->getLine()
+		];
+		return Json::encode($array);
+	}
+
+
 	/**
 	 * @param $state
 	 * @param $body
@@ -98,5 +119,4 @@ class Json
 
 		return static::encode($params);
 	}
-
 }