update workerman to 3.3.4

Workerman/Protocols/Frame.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * This file is part of workerman.
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the MIT-LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @author    walkor<walkor@workerman.net>
+ * @copyright walkor<walkor@workerman.net>
+ * @link      http://www.workerman.net/
+ * @license   http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Workerman\Protocols;
+
+use Workerman\Connection\TcpConnection;
+
+/**
+ * Frame Protocol.
+ */
+class Frame
+{
+    /**
+     * Check the integrity of the package.
+     *
+     * @param string        $buffer
+     * @param TcpConnection $connection
+     * @return int
+     */
+    public static function input($buffer, TcpConnection $connection)
+    {
+        if (strlen($buffer) < 4) {
+            return 0;
+        }
+        $unpack_data = unpack('Ntotal_length', $buffer);
+        return $unpack_data['total_length'];
+    }
+
+    /**
+     * Decode.
+     *
+     * @param string $buffer
+     * @return string
+     */
+    public static function decode($buffer)
+    {
+        return substr($buffer, 4);
+    }
+
+    /**
+     * Encode.
+     *
+     * @param string $buffer
+     * @return string
+     */
+    public static function encode($buffer)
+    {
+        $total_length = 4 + strlen($buffer);
+        return pack('N', $total_length) . $buffer;
+    }
+}