Resend the session cookie periodically to prevent early logout

서버단에는 세션 쿠키가 살아 있는데 클라이언트단에서 먼저 만료되지 않도록
일정한 시간 간격으로 세션 쿠키를 재전송해 주도록 한다.
특정한 환경에서 로그인이 풀리는 빈도를 줄이는 데 도움이 될 수 있다.

common/framework/session.php

@@ -231,7 +231,7 @@ class Session
 		}
 		elseif ($must_refresh)
 		{
-			return self::refresh();
+			return self::refresh(true);
 		}
 		elseif ($must_resend_keys)
 		{
@@ -453,9 +453,10 @@ class Session
 	 * This method can be used to invalidate old session cookies.
 	 * It is called automatically when someone logs in or out.
 	 *
+	 * @param bool $set_session_cookie
 	 * @return bool
 	 */
-	public static function refresh()
+	public static function refresh($set_session_cookie = false)
 	{
 		// Get session parameters.
 		$domain = self::getDomain() ?: preg_replace('/:\\d+$/', '', strtolower($_SERVER['HTTP_HOST']));
@@ -492,7 +493,7 @@ class Session
 		}
 		
 		// Pass control to _setKeys() to send the keys to the client.
-		return self::_setKeys();
+		return self::_setKeys($set_session_cookie);
 	}
 	
 	/**
@@ -1100,9 +1101,10 @@ class Session
 	/**
 	 * Set session keys.
 	 * 
+	 * @param bool $set_session_cookie
 	 * @return bool
 	 */
-	protected static function _setKeys()
+	protected static function _setKeys($set_session_cookie = false)
 	{
 		// Get session parameters.
 		list($lifetime, $refresh_interval, $domain, $path, $secure, $samesite) = self::_getParams();
@@ -1116,6 +1118,12 @@ class Session
 			'httponly' => true,
 			'samesite' => $samesite,
 		);
+		
+		// Refresh the main session cookie.
+		if ($set_session_cookie)
+		{
+			self::_setCookie(session_name(), session_id(), $options);
+		}
 
 		// Set or destroy the HTTP-only key.
 		if (isset($_SESSION['RHYMIX']['keys'][$alt_domain]['key1']))