public function set_rewrite()
  {
		if (!defined('G_INDEX_SCRIPT'))
		{
			return false;
		}

		$request_main = $this->request_main;

		if (!$request_main OR $this->index_script == $request_main)
		{
			$this->controller = 'main';
			$this->action = 'index';

			return $this;
		}

  		$request = explode('?', $request_main, 2);

  		if (count($request) == 1)
  		{
  			$request = explode('&', $request_main, 2);
  		}

		$uri = array(
			'first' => array_shift($request),
			'last' => ltrim(implode($request), '?')
		);

		if ($uri['last'])
		{
			parse_str($uri['last'], $query_string);

			foreach ($query_string AS $key => $val)
			{
				if (!$_GET[$key])
				{
					if (! strstr($val, '%'))
					{
						$_GET[$key] = $val;
					}
					else
					{
						$_GET[$key] = urldecode($val);
					}
				}
			}
		}

        /************************************
         * 修改部份
         * 过滤首尾符号
         ***********************************/
        $uri['first'] = trim($uri['first'], $this->params['sep_act']);
		$request = explode($this->params['sep_act'], $uri['first']);
        /**end******************************/

		$uri['first'] = array(
			'pattern' => '',
			'args' => $request
		);

		$__app_dir = $this->default_vars['app_dir'];	// 应用目录
		$this->controller = $this->default_vars['controller'];	// 控制器
		$this->action = $this->default_vars['action'];	// 动作

		$args_var_str = '';

		// 删除空值
		foreach ($uri['first']['args'] AS $key => $val)
		{
			if (strstr($val, $this->params['sep_value']) AND !$start_key)
			{
				$start_key = $key;
			}
			else if ($start_key)
			{
				$uri['first']['args'][$start_key] .= $this->params['sep_act'] . $val;

				unset($uri['first']['args'][$key]);
			}
		}

		// 网址解析
        /************************************
         * 修改部份
         * app_dir/controller/action/id
         * app_dir/ajax/controller/action/id
         ***********************************/
        $args_count = count($uri['first']['args']);
        if ($args_count < 5)
        {
            for ($i=0; $i<(5-$args_count); $i++)
            {
                $uri['first']['args'][] = '';
            }
        }
        
        list($_app, $_controller, $_action, $_id, $_ajax) = $uri['first']['args'];
        
        $route_rules = array(
            "{$_app}/{$_controller}/{$_action}/{$_id}/{$_ajax}",
            "{$_app}/{$_controller}/{$_action}/{$this->default_vars['action']}/{$_id}",
            "{$_app}/{$_controller}/{$_action}/{$this->default_vars['action']}",
            "{$_app}/{$_controller}/{$_action}/{$_id}",
            "{$_app}/{$_controller}/{$this->default_vars['action']}/{$_action}",
            "{$_app}/{$_controller}/{$this->default_vars['action']}",
            "{$_app}/{$this->default_vars['controller']}/{$_controller}/{$_action}",
            "{$_app}/{$this->default_vars['controller']}/{$this->default_vars['action']}/{$_controller}",
            "{$_app}/{$this->default_vars['controller']}/{$this->default_vars['action']}",
            "{$this->default_vars['app_dir']}/{$this->default_vars['controller']}/{$_app}/{$_controller}",
            "{$this->default_vars['app_dir']}/{$this->default_vars['controller']}/{$this->default_vars['action']}/{$_app}",
            "{$this->default_vars['app_dir']}/{$this->default_vars['controller']}/{$this->default_vars['action']}",
        );
        
        foreach ($route_rules as $key => $rule)
        {
            if (strpos($rule, '//') !== false) {
                continue;
            }
            
            if (substr($rule, -1) === '/') {
                continue;
            }
            
            list($_app, $_controller, $_action, $_id, $_ajax) = explode('/',$rule);
            
            if ($_ajax === null) {
            
                $_controller_file = ROOT_PATH . 'app/' . $_app . '/' . $_controller . '.php';
                if (file_exists($_controller_file)  
                      AND !strstr($_action, '=') 
                      AND !strstr($_action, '__') 
                      AND !strstr($_action, '-') 
                      AND !strstr($_action, '.')) {
                
                    $__app_dir = $_app; //应用目录
                    $this->controller = $_controller; //控制器
                    $this->action = $_action; //动作
                    $args_var_str = $_id; //参数
                    $__app_dir = $_app;
                    break;
                }
            
            } else {
                $_controller_file = ROOT_PATH . 'app/' . $_app . '/' . $_controller . '/' . $_action . '.php';
                if (file_exists($_controller_file)  
                      AND !strstr($_id, '=') 
                      AND !strstr($_id, '__') 
                      AND !strstr($_id, '-') 
                      AND !strstr($_id, '.')) {
                
                    $__app_dir = $_app; //应用目录
                    $this->controller = $_controller . '/' . $_action; //控制器
                    $this->action = $_id; //动作
                    $args_var_str = $_ajax; //参数
                    break;
                }
            }
        
        }
        /**end******************************/
        
        $this->app_dir = ROOT_PATH . 'app/' . $__app_dir . '/';
        $_GET['c'] = $this->controller;
        $_GET['act'] = $this->action;
        $_GET['app'] = $__app_dir;

		if ($args_var_str)
		{
			if (substr($args_var_str, 0, strlen($this->params['sep_var'])) == $this->params['sep_var'])
			{
				$args_var_str = substr($args_var_str, strlen($this->params['sep_var']));
			}

			if (!strstr($args_var_str,'-'))
			{
				$_GET['id'] = urldecode($args_var_str);
			}

			$uri['last'] = explode($this->params['sep_var'], $args_var_str);

			foreach ($uri['last'] as $val)
			{
				@list($k, $v) = explode($this->params['sep_value'], $val, 2);

				if ($k)
				{
					if (! strstr($v, '%'))
					{
						$_GET[$k] = $v;
					}
					else
					{
						$_GET[$k] = urldecode($v);
					}
				}
			}
		}

		foreach ($_GET AS $key => $val)
		{
			if (strstr($key, '/'))
			{
				unset($_GET[$key]);
			}
		}

		return $this;
  }